7.7 - Electrical Wiring Interconnection System Flashcards by Joshua McDonnell

How would you identify a spare wire in a bundle?

Identify a spare wire in a bundle by the ‘‘spare wire’’ label and an insulating end cap NSA936601 at each end

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What does EWIS stand for?

EWIS = Electrical Wiring Interconnection System

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What is EWIS training based on?

EWIS training is based on EASA AMC 20-22 and FAA 120-94

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The Aging Transport Systems Rulemaking Advisory Committee ATSRAC is a _____________

The Aging Transport Systems Rulemaking Advisory Committee ATSRAC is a Federal Advisory Committee

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What should the minimum bend radius of a wire in a loom be?

The minimum radius of a bend in a wire loom is no less than 10X the outside diameter of the largest wire in the loom

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Insulation is checked by using how much operating voltage?

Insulation is checked by using twice the operating voltage

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What happens when the Voltmeter is connected across an open circuit?

When a Voltmeter is connected across an open circuit in a supply cable the Meter will indicate Voltage less than the supply Voltage

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Primary Conductors are required to carry _____ currents

Primary Conductors are required to carry lighting currents

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When using an ohmmeter to check a shorted resistor in a circuit, the meter will read …

When using an ohmmetere to check a shorted resistor in a circuit, the meter will read Zero ohms

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Composite panel bonding test uses ______________

Composite panel bonding test uses an Insulation resistance tester

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What type of Voltage does an Insulation resistance tester use?

Insulation resistance tester uses DC voltage

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What is the Max bonding value for Primary conductors?

Max bonding value for Primary conductors is 0.05 Ohms

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How are circuit tests on aircraft carried out? (in what order)

Circuit tests on aircraft are carried out in the following order.
Bonding, continuity, Insulation, functional (BCIF)

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Exceeding 200 degrees C. Use a __________ cable

Exceeding 200 degrees C. Use a Nickel-plated cable

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Oxide on exposed _____-plated cable in an insulator

Oxide on exposed silver-plated cable in an insulator

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Knuckling on older type electrical cables is caused by …

Knuckling on older type electrical cables is caused by excessive pull through forces

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Ohmmeter leads resistance should be less than ?

Ohmmeter leads resistance should be less than 1 ohm

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To find high resistance or open circuit, do a ________ check?

To find high resistance or open circuit, do a continuity check

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Equipment cable is ______________________

Equipment cable is flexible and suitable for soldering

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What happens if Silver coated connector encounters Glycol de-icing fluid?

Silver coated connector encounters Glycol de-icing fluid causes a fire hazard

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Aluminium oxide layer becomes _________ as temperature is increased

Aluminium oxide layer becomes thicker as temperature is increased

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What is the max temperature rating of tin coated copper cable?

Max temperature rating of tin coated copper cable is 135 degrees C

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Insulation resistance for wiring in the wheel-well area is what?

Insulation resistance for wiring in the wheel well area is more than 2 megaohms

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Interconnect cable has insulation ______ than airframe cable

Interconnect cable has insulation thinner than airframe cable

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What can a Hot stamped cable cause?

Hot stamped cable can cause wet arc tracking

When crimping wires onto a terminal, how far should the wire extend beyond the crimp?

Crimping wires onto a terminal, the wire should extend 0.8mm or 1/32 inch beyond the crimp

What ATA chapter would deal with Crimping electrical wires?

Crimping electrical wires. ATA chapter 20

What 2 things should be considered when choosing a cable?

When choosing a cable, consider current carrying capacity and allowable voltage drop

A crimped electrical terminal is suspected of high resistance. How would you verify this without disconnecting the circuit?

Measure the millivolt drop across the connection with a millivolt meter

How can insulation grip be adjusted on an AMP PIDG crimping tool?

Insulation grip can be adjusted on an AMP PIDG crimping tool by adjusting the pins

What colour is the following: 22-18 Gauge 16-14 Gauge 12-10 Gauge

How is the pin released and extracted from a Rear release connector?

Rear release connector, the pin will be released from the rear and extracted from the rear

When carrying out a millivolt drop check on a circuit, the approximate guide for correct reading is

When carrying out a millivolt drop check on a circuit, the approximate guide for correct reading is 5 millivolts for every 10 amps flowing

What is the minimum number of strands in a cable?

Minimum number of strands in a cable is 19

Over what interval does a cable have an identification tag?

Cable has an identification tag every 15 inches

Over what interval should a wire be supported?

Wires should be supported at intervals no more than 24 inches

What is the allowable bend radius for RF / Coax cable?

Allowable bend radius for RF / Coax cable is, not less than 6x the outside of the diameter of the Coax cable

What is the clearance that should be kept between wires and moving parts?

Half an inch clearance from any moving parts

Where are Zip Ties not allowed?

Zip Ties aren't allowed near motion / control areas

What is a triaxial cable?

A triaxial cable is one which has a double shielded wire and a single core

Hot wire stamping can cause ?

Hot wire stamping can cause Dry arc tracking

When might Red plague happen?

Red plague happens with Silver plated conductors

In high temperature areas, what wire should be used?

In high temperature areas use Nickel plated copper wire

In fire zones, what wire should be used?

In fire zones use Nickel clad copper wire

The slack allowed in a wire bundle should not exceed ?

The slack allowed in a wire bundle should not exceed 1/2 inch

A blue AMP Amphenol (PIG) crimped connector should show ? dimples

A blue AMP Amphenol (PIG) crimped connector should show 2 dimples

The current carrying capacity and allowable voltage drop

22 - 18 gauge

The correct tool was used on the terminal

5 millivolts for every 10 amps flowing

Extend 0.8 mm or 1/32 inch beyond the crimp

American Wire Gauge

Both the crimping tool and size of cable to be used

Multimeter set to AC volts

Yes by adjusting the pins

Horizontal

The bleed valve opens and the ram retracts

Measure the millivolt drop across the connection with a millivolt meter

Released from the rear and extracted from the rear

Conductivity

1. An HT lead is a) single core screened b) multi core screened c) single core unscreened

c) single core unscreened

2. A 14 gauge cable when compared to an 18 gauge cable has a) lower current rating b) higher current rating c) the same current rating

b) higher current rating

3 An interconnect cable has what insulation? a) thinner than airframe cable b) thicker than airframe cable c) same thickness as airframe cable

a) thinner than airframe cable

4. Max temperature of tin coated copper cable? a) 135oC b) 200oC c) 260oC

a) 135oC

5. Plug pins are numbered a) from the outside in - clockwise b) from the inside out - anticlockwise c) from the inside out - clockwise

c) from the inside out - clockwise

6. Equipment wire a) is flexible and suitable for soldering b) can be used for interconnect wiring c) has thicker insulation than interconnect wire

a) is flexible and suitable for soldering

7. In the wiring code shown, what does the number 6 (4th number from the left) represent? 1EF6B22 NMS V a) Cable size b) Cable number c) Circuit function

b) Cable number

8. An aluminium oxide layer on a conductor will do what when the temperature is increased? a) Become thicker b) Become thinner c) Remain the same

a) Become thicker

9. What is a coaxial cable? a) Two or more conductors b) A twisted pair of conductors c) A single shielded cable

c) A single shielded cable

10. ‘X’ on a cable indicates a) emergency power b) control system c) AC power

c) AC power

11. What must you be careful with a hot stamped cable? a) Wet arc tracking b) Corrosion c) Peeling of the insulation

a) Wet arc tracking

12. What is the effect of aluminium oxide on aluminium electrical cable? a) Provides strength b) Reduces resistance c) Insulates

c) Insulates

13. Composition of silver solder is a) tin and lead b) tin, lead and silver c) tin, lead, silver and antimony

c) tin, lead, silver and antimony

14. What amperage is an 18 swg cable? a) 10 amp b) 5 amp c) 1 amp

a) 10 amp

15. A co-axial cable is better than a normal cable because a) there is an electrostatic field around it which helps to reduce the electromagnetic field b) weight for weight it can carry more signal c) it has less resistance

a) there is an electrostatic field around it which helps to reduce the electromagnetic field

16. What is the danger if a silver coated connector comes into contact with glycol de icing fluid a) Fire hazard b) Corrosion c) Wet arc tracking

a) Fire hazard

17. The conductor in tersil cable is a) tinned copper b) nickel plated copper c) stainless steel

b) nickel plated copper

18. A cable is marked NYVIN 22. The 22 represents the a) current rating b) current/weight ratio c) cross sectional area

c) cross sectional area

19. Copper is an inferior conductor to aluminium when comparing a) weight for weight b) CSA with CSA c) load for load

weight for weight Aluminium is better than copper when you compare weight to weight

20. Silver plated copper wire has a maximum working temp of a) 260 oC b) 200 oC c) 300 oC

b) 200 oC Nickel - 260 Silver - 200 Tin 135

21. For an electrical cable to be fireproof it must be able to stand 1100 deg C for a) 10 mins b) 15 mins c) 20 mins

b) 15 mins

22. Oxide on exposed silver plated wires is a) non corrosive b) an insulator c) a conductor

b) an insulator

23. In a front release connector the pin will be a) released from the front and extracted from the rear b) released from rear and extracted from the front c) released from the front and extracted from the front

a) released from the front and extracted from the rear

24. What cable would you use where temperatures are going to exceed 200 degrees C? a) Aluminium b) Silver plated c) Nickel plated

c) Nickel plated

25. A dry joint in soldering is caused by a) flux not used b) components not hot enough c) wrong solder used

b) components not hot enough

26. The type of flux to be used When soft soldering on aircraft is a) active b) non-active c) either active or non-active

b) non-active

27. To carry out an insulation test on a wire rated at 115 volts you would use a) a 500 volt meggar b) a 250 volt meggar c) a 115 volt meggar

b) a 250 volt meggar

28. A wire clamped vertically at one end and horizontally at the other end should have a bend radius of no less than a) 10 times the diameter of the wire b) 3 times the diameter of the wire c) 5 times the diameter of the wire

b) 3 times the diameter of the wire

29. A dry joint when soldering is caused by a) too much flux b) too little heat c) too large an iron

b) too little heat

30. With a rear release connecter, the pin will be a) released from the front and extracted from the rear b) released from the rear and extracted from the rear c) released from the rear and extracted from the front

b) released from the rear and extracted from the rear

31. The maximum operating temperature for a nickel plated copper or aluminium connector is a) 135oC b) 200 oC c) 260 oC

c) 260 oC

32. What gauge of pin would a yellow plastic insert / extract tool be used on? a) 12 - 10 b) 22 - 18 c) 16 - 14

a) 12 - 10

33. Can the insulation grip be adjusted on a PIDG crimp tool? a) No b) Yes by turning a knob c) Yes by adjusting the pins

c) Yes by adjusting the pins

34. What gauge of pin would a red plastic insert / extract tool be used on? a) 12 - 10 b) 22 - 18 c) 16 - 14

b) 22 - 18

35. What cable would you use where temperatures are going to exceed 200oC? a) Tinned copper or aluminium b) Silver plated copper or aluminium c) Nickel plated copper or aluminium

c) Nickel plated copper or aluminium

36.The maximum value of bonding of a secondary structure is a) 1 kilohm b) 1 megohm c) 1 ohm

c) 1 ohm

37. What gauge of pin would a blue plastic insert / extract tool be used on? a) 12 - 10 b) 22 - 18 c) 16 – 14

c) 16 – 14

38. The insulation resistance for wiring in undercarriage wheelwells should normally be not less than a) 10 megohms b) 5 megohms c) 2 megohms

c) 2 megohms

39. Circuit tests on aircraft should be carried out in the following order a) continuity, bonding, functional, insulation b) functional, bonding, continuity, insulation c) bonding, continuity, insulation, functional

c) bonding, continuity, insulation, functional

40. After the normal function test of an individual circuit has been completed and the circuit switched off a) a second function test must be carried out to verify the first b) the fuse should be removed and the circuit again switched on to check the isolation of the circuit concerned c) a duplicate check must be carried out in accordance with AWN 3

b) the fuse should be removed and the circuit again switched on to check the isolation of the circuit concerned

41. A 250 volt megger should not be used a) in fuel tanks b) on electronic equipment c) on radio aerials

b) on electronic equipment

42. If the leads of a megger are held apart a) the spring will return the needle to the zero stop b) if the handle was turned the metre would read infinity c) the spring will return the needle to infinity

b) if the handle was turned the metre would read infinity

43. What causes knuckling on older type electrical cables? a) Excessive pull through forces b) Over-temperature soldering c) Applying cable ties too tightly

a) Excessive pull through forces

44. To find a high resistance or open circuit, carry out a) a bonding check b) a milli-volt drop test c) a continuity check

c) a continuity check

45. The maximum bonding resistance on an aircraft primary structure should be a) 0.001 ohms b) 0.01 ohms c) 0.05 ohms

c) 0.05 ohms

46. One megohm is equal to a) 1,000 ohms b) 100,000 ohms c) 1,000,000 ohms

c) 1,000,000 ohms

47. Before effecting a crimp, the bare ends of a cable should be a) twisted lightly in the direction of the lay b) straightened out c) tightly twisted

a) twisted lightly in the direction of the lay

48. The leads of a bonding tester a) have critical lengths and the resistance of the leads is accounted for b) are supplied in 60 foot and 6 foot lengths but can be varied due to wear c) are interchangeable, one 60 foot long having two prongs and a 6 foot one with a single prong

a) have critical lengths and the resistance of the leads is accounted for

49. The number of the dots impressed on the insulation of the pre-insulated connectors during crimping indicates that a) the crimp is properly formed b) the correct tool was used to effect the connection c) the correct connector has been used

b) the correct tool was used to effect the connection

50. The pressure of the insulation crimp jaws on the PIDG crimping tool can be changed by a) varying the torque applied to the handles b) changing the position of the pins c) using different coloured crimping pliers and terminations

b) changing the position of the pins

51. When referring to fuses, HRC means a) hot running capacity b) high running current c) high rupture capacity

c) high rupture capacity

52. High temperature solder is used where the operating temperature is high. It is an alloy of a) lead / copper / antimony b) tin / zinc / antimony / silver c) tin / lead / antimony / silver

c) tin / lead / antimony / silver

53. A flux is used in soldering to a) etch the metal surface for more adhesion b) dissolve oxides c) prevent solder spikes

b) dissolve oxides

54. The test equipment normally used to carry out a continuity test on an electrical cable is a) a high tension circuit tester b) a low reading ohmmeter c) an ammeter

b) a low reading ohmmeter

55. If all three prongs on a bonding tester were shorted together, the metre would read a) zero b) FSD c) off-scale high

a) zero

56. A hole is placed in the lowest point of electrical cable conduit a) to allow for pull-through of the cables b) to allow for drainage of moisture c) to secure the conduit to a piece of aircraft structure

b) to allow for drainage of moisture

57. The soldering method where molten solder is pumped from the bottom of a bath through a slot so that a stationary wave of solder appears on the surface is known as the a) standing wave bath method b) stationary wave method c) rotary bath method

a) standing wave bath method

58. A fire resistant cable is proof tested by exposure to a standard fire for a) 5 minutes b) 15 minutes c) 30 minutes

a) 5 minutes

59. When making a small soldered electrical connection, using flux-cored solder a) the soldering iron should be loaded with solder and then applied to the connection b) the connection should be heated first and then solder applied c) the soldering iron and solder should be applied simultaneously to the connection

c) the soldering iron and solder should be applied simultaneously to the connection

60. Silver solder melts within the range a) 200° C - 400° C b) 400° C - 550° C c) 600° C - 850° C

c) 600° C - 850° C

61. An open circuit on an ohmmeter would be indicated by a reading of a) infinite resistance b) zero resistance c) a negative resistance

a) infinite resistance

62. The leads of an ohmmeter should be replaced if their resistance is greater than a) 0.05 ohms b) 0.5 ohms c) 1 ohm

c) 1 ohm

63. Which electrical measuring device needs a power source a) a voltmeter b) an ammeter c) an ohmmeter

c) an ohmmeter

64. When measuring voltage or current with a digital multimeter, the indication is a) peak values b) RMS values c) Average values

b) RMS values

65. On a multimeter, what colour lead is connected to the Common socket a) red b) black c) green

b) black

66. A voltage drop across a component is measured by placing the meter in a) parallel with the component b) series with he component c) series with the power source

a) parallel with the component

67. A resurfaced soldering iron cannot be used effectively until after the working face has been a) fluxed b) polished c) tinned

c) tinned

68. One purpose for schematic diagrams is to show the a) functional location of components within a system b) physical location of components within a system c) size and shape of components within a system

a) functional location of components within a system

69. Which of the following could be a primary cause of HIRF protection failure? a) Unserviceable radio filters b) Broken or missing static wicks c) Corrosion on bonding leads

a) Unserviceable radio filters

70. When checking a diode forward bias function, the positive lead of the ohmmeter should be placed on the a) anode and the negative lead to the cathode b) cathode and the negative lead to the anode c) cathode and the negative lead the earth

a) anode and the negative lead to the cathode

71. An avometer can measure alternating current because it has a a) moving coil b) moving iron c) bridge rectifier circuit

c) bridge rectifier circuit

72. When clamping cable looms containing co-axial cables a) avoid distortion to the co-axial cable to maintain the dielectric constant b) distortion of the outer sheath is allowed providing the inner cable is not affected c) the clamps must be no more than 1 metre apart

a) avoid distortion to the co-axial cable to maintain the dielectric constant

73. When fitting coaxial cable connectors it is important to a) fit the correct lock nuts b) not damage any seals fitted c) make sure the outer cup is fitted the correct way round

b) not damage any seals fitted

74. A crimped electrical connection is suspected to be high resistance. How would you verify this without disconnecting the circuit? a) Measure the resistance with a 250 volt megger b) Measure the resistance with an ohmmeter c) Measure the millivolt drop across the connection with a millivolt meter

c) Measure the millivolt drop across the connection with a millivolt meter

75. How would you measure continuity of a coaxial cable? a) With a 250 volt megger b) With a safety ohmmeter c) With a reflectometer

c) With a reflectometer

76. Before using a bonding tester, the 6 foot lead has the two prongs shorted together with a piece of metal. What would the indicator read? a) Full scale left b) Full scale right c) Zero at the centre

b) Full scale right

77. When using a megger to test insulation resistance, capacitive filters should be disconnected for what reason? a) Remove the risk of damage to the megger b) Remove the spurious readings caused by the capacitors charging and discharging c) Prevent damage to the filters

c) Prevent damage to the filters

78. In order to maintain HIRF protection, bonding checks between airframe and electrical components carrying voltages greater than 50V RMS or dc should not exceed: a) 1 M ohm b) 1 ohm c) 0.05 ohm

b) 1 ohm

79. Ribbon cables affected by mutual impedance and current loop leakage should be protected by a) Shielding each individual conductor b) Connecting all conductors to a common earth c) Earthing each alternate conductor to separate points

c) Earthing each alternate conductor to separate points

80. On a long co-axial cable how would you check for discontinuities and shorts in situ? a) Safety ohmmeter b) Time domain reflectometer c) Continuity tester

b) Time domain reflectometer

81. What is the minimum bend radius of a loom adequately supported at a terminal block? a) 8 x diameter b) 3 x diameter c) 10 x diameter

b) 3 x diameter

82. How are front release pins removed? a) The tool is Inserted from the front and the pin is removed from the front b) The tool is inserted from the front and the pin is removed from the rear c) The tool is inserted from the rear and the pin Is removed from the front

b) The tool is inserted from the front and the pin is removed from the rear

83. If a co-axial cable clamp is over tightened so as to compress the di-electric, how will the capacitance change? a) Increase b) Decrease c) Stay the same

b) Decrease

84. What is the minimum bend radius of a single co-axial cable? a) 3xdiameter b) 6 x diameter c) 10 x diameter

b) 6 x diameter

85. What is the maximum resistance between the main earth system and a metal plate on which the earthing device (tyre) is resting? a) 1 megohm b) 10 megohms c) 100 megohms

b) 10 megohms

86. What is the primary purpose of bonding of metallic parts of an aircraft? a) To prevent lightening strikes b) To carry provide a return path for electrical two-wire system c) To prevent high potential differences between metallic parts from building up

c) To prevent high potential differences between metallic parts from building up

87. What is the reason for a primary bonding connection’s large cross-sectional area? a) To carry lightening discharge current should the need arise b) To maintain the airframe at the same potential throughout c) To carry the static discharge current to the conducting nose wheel

a) To carry lightening discharge current should the need arise

88. The three electrical checks carried out on aircraft are (1) continuity (2) bonding (3) insulation. What is the order in which they are executed? a) 1-2-3 b) 2-3-1 c) 2-1-3

c) 2-1-3

89. When an engine is not in direct electrical contact with its mounting, how should it be bonded? a) With at least one primary conductor b) With at least two primary conductors, one each side of the engine c) With at least two primary conductors on one side of the engine

b) With at least two primary conductors, one each side of the engine

90. When carrying out a serviceability check on a bonding tester - short together the three prongs of both probes and ensure which of the following? a) A full scale reading is obtained is obtained b) A zero reading c) The meter reads 0.1 ohm

b) A zero reading

91. When an earth-return terminal assembly has to be replaced which of the following checks must be carried out? a) Bonding and milli-volt drop tests b) Bonding and insulation resistance tests c) Bonding and continuity tests

a) Bonding and milli-volt drop tests

92. If the leads of a bonding tester are damaged, what is the procedure? a) A new lead may be manufacturers using the correct current rated cable b) Provided that the damage is situated dose to the end of the leads the cable may be shortened c) The damaged leads and the tester should be returned to the manufacturer for repair and calibration

c) The damaged leads and the tester should be returned to the manufacturer for repair and calibration

93. When carrying out milli-volt drop checks on a circuit, what is an approximate guide for a correct reading? a) 10 milli-volts for every 15 amps flowing b) 5 milli-volts for every 10 amps flowing c) 10 milli-volts for every 5 amps flowing

b) 5 milli-volts for every 10 amps flowing

94. When refueling an aircraft from a tanker, why are the aircraft and tanker bonded together? a) To enable the aircraft re-fuel pumps to be operated from the tanker electrical supply b) To maintain the aircraft and tanker at the same electrical potential c) To discharge static electricity from the aircraft to the tanker

b) To maintain the aircraft and tanker at the same electrical potential

95. When carrying out a continuity test on a circuit when a known resistance exists, what instrument would you use? a) A multimeter b) A high resistance insulation tester c) A lamp and battery

a) A multimeter

96. Effective continuity is not possible unless which of the following conditions exists? a) All circuit earths are disconnected b) The portion of the circuit under test must constitute a simple series circuit with no parallel paths c) All manually operated switches must be off

b) The portion of the circuit under test must constitute a simple series circuit with no parallel paths

97. Why is a low voltage supply used for continuity testing? a) To avoid damage to the wiring b) To avoid breaking down a high resistance film that might exist between contacting surfaces c) To prevent fuses “blowing” and lamps burning out

c) To prevent fuses “blowing” and lamps burning out

98. When replacing a bonding connection and the original conductor cannot be matched exactly, which of the following replacements would you use? a) One manufactured from the same type of material, but of greater cross sectional area should be selected b) One manufactured from any conducting material of the same cross sectional area be used c) One manufactured from any piece of Nyvin cable having the correct current capacity may be used

a) One manufactured from the same type of material, but of greater cross sectional area should be selected

99. How do you reduce or remove electrostatic charges which may build up on fibre glass surfaces? a) The surface is impregnated with copper strips b) The surface is treated with a special conductive paint c) No special treatment is necessary because fibre glass is an insulator

b) The surface is treated with a special conductive paint

100. If bridging strips or bonding cords are fractured, what action may be taken? a) A new conductor should be fitted b) The broken ends can be soldered c) The broken ends can be repaired with an “in-line” splice

a) A new conductor should be fitted

101. An Insulation test is carried out on a group of cables and a low reading obtained. What action would you take? a) Change or renew all the cables involved in the test b) Break the circuit down and carry out further checks c) A low reading would be expected because the cables are in parallel

b) Break the circuit down and carry out further checks

102. Immediately after carrying out an insulation check, which of the following applies? a) A continuity check must be carried out before switching on the circuit for the first time b) The readings observed and the atmospheric conditions at the time should be noted and compared to previous readings c) The observed readings should be noted and an independent check carried out by another engineer

b) The readings observed and the atmospheric conditions at the time should be noted and compared to previous readings

103. When using a digital meter to test a diode , a correct operation of the diode is indicated by a volt drop of a) 0.3v to 0.7v b) 1.5v to 2v c) 2.5v to 2.8v

a) 0.3v to 0.7v

104. The recommended insulation resistance of a DC motor is a) 0.5 megohms b) 2 megohms c) 5 megohms

a) 0.5 megohms

105. Live AC circuits to be checked for open circuits by the use of a) ohmmeter set to megohms b) ammeter set to amps c) multimeter set to AC volts

c) multimeter set to AC volts

106. A millivolt drop check is to be carried out on a heavy duty relay. The Millivolt meter would be connected to the relay a) when contacts are open and power is on b) when contacts closed and power is on c) when contacts open and power off

b) when contacts closed and power is on

107. When using bonding tester a) ensure prongs penetrate anodised layer b) ensure prongs do not penetrate anodising layer c) an anodised component cannot be tested

a) ensure prongs penetrate anodised layer

108. How many primary bonding conductors are required on an engine? a) 2 on one side b) 1 on each side c) 1 only

b) 1 on each side

109. Bonding value for secondary structure is a) 1 ohm b) 0.5 ohms c) 0.05 ohms

a) 1 ohm

110. 'E' on a wire, under ATA 100 is a a) phase indication b) system ID code c) cable size

b) system ID code

111. To prevent wet arc tracking a) cables should not be stretched b) cable grips should be tight c) ensure hot stamp printing is controlled

c) ensure hot stamp printing is controlled

112. When splicing a cable with a solder ferrule, the operation is finished when a) the solder has melted b) the solder and insulation have formed c) the solder sleeve disappears

b) the solder and insulation have formed

113. How do you prevent earth loops forming on screened cables? a) Do not earth the screen b) Earth both ends of the screen c) Earth one end of the screen

c) Earth one end of the screen

114. When carrying out a bonding test in the presence of an anodic coating, what should you do? a) Take account of the resistance of the coating b) Disregard the resistance of the coating c) Penetrate the coating so a good electrical contact is made

c) Penetrate the coating so a good electrical contact is made

115. When crimping wires, the wires should be a) lightly twisted b) twisted c) straight

a) lightly twisted

116. Why are copper wires used in electrical systems? a) They do not give off a magnetic field b) They have high permeability c) They have a low resistance to current

c) They have a low resistance to current

117. When crimping wires, the wire should a) extend 0.8 mm beyond the crimp b) be flush with the crimp c) be beneath the crimp

a) extend 0.8 mm beyond the crimp

118. 1EF6B22NMSV What does the B mean a) Segment letter b) Circuit function c) Cable number

a) Segment letter

Q1. What is the maximum number of electrical wire terminals that can be installed on one stud ? (a) Two terminals per stud. (b) Three terminals per stud. (c) Four terminals per stud.

Q2. A relay with a moving core is usually known as a: - (a) solenoid. (b) polarised relay. (c) proximity switch

(a) solenoid.

Q3 If a fuse is rated at 10 amps and is 33 A.W.G., a fuse rated at 20 amps will have a thickness of: - (a) 28 A.W.G. (b) 38 A.W.G. (c) 42 A.W.G.

(a) 28 A.W.G.

Q4 The target of the reed switch is a: - (a) mica strip. (b) magnet. (c) ferrous plate

(b) magnet.

Q5 A copper generator cable gauge 14 might be replaced by an aluminium cable gauge 12 16 14

Q6 Circuit board edge connections are sometimes known as: - (a) finger contacts. (b) strip contacts. (c) sliding contacts.

(a) finger contacts.

Q7. A triaxial cable is one which has a: - (a) single shielded wire and two cores. (b) double shielded wire and a single core. (c) single shielded wire and a single core.

(b) double shielded wire and a single core.

Q8 On a long co-ax cable how would you check for discontinuities and shorts a) Safety Ohmmeter b) Time Domain Reflectometer c) Continuity tester

b) Time Domain Reflectometer

Q9 When installing electrical wiring parallel to a fuel line, the wiring should be a) in metal conduit. b) in a non-conductive fire-resistant sleeve. c) above the fuel line.

c) above the fuel line.

Q10 In-line splices must be; a) Only used in groups of three b) Only used on coaxial cables c) Spread evenly along the length of the loom.

c) Spread evenly along the length of the loom.

Q11 The combined effects of insulation damage and fluid contamination gives rise to: (a) electromagnetic interference (b) wet arc tracking (c) current surges

(b) wet arc tracking

Q12 The effects of hot wire stamping with the wire part number can give rise to; (a) electromagnetic interference (b) Dry arc tracking (c) current surges

(b) Dry arc tracking

Q13 Coaxial cables are normally used for: (a) digital signals (b) motors and generators (c) radio-frequency (RF) signals.

Q14 Trip-free circuit-breaker contacts: (a) can always be closed whilst a fault exists (b) cannot be closed whilst a fault exists (c) are only used during maintenance.

(b) cannot be closed whilst a fault exists

Q15 For a given wire size, when installed in a loom it will be able to safely conduct: (a) more current compared to a wire in free circulating air (b) less current compared to a wire in free circulating air (c) the same current compared to a wire in free circulating air.

(b) less current compared to a wire in free circulating air

Q16 Aluminium wire especially at high altitudes is (a) More brittle than copper wire (b) Less brittle than copper wire (c) Less brittle than copper wire but only at high altitudes

(a) More brittle than copper wire

Q17 Red plague happens with (a) Red spiders in hot moist climates (b) Red fleas in hot moist climates (c) Silver plated conductors

Q18 In high temperature areas I would use (a) Nickel plated copper wire (b) Silver plated copper wire Less brittle than copper wire (c) Tin plated copper Aluminium wire

(a) Nickel plated copper wire

Q19 In fire zones I would use (a) Nickel clad copper wire (b) Nickel plated copper wire (c) Tin plated Aluminium wire

(a) Nickel clad copper wire

Q20 Which of the following cable types is suitable for soldering (a) Equipment wire (b) Interconnect wire (c) Airframe wire

(a) Equipment wire

Q21 Glycol can cause a fire in the presence of (a) Silver plated copper wire (b) Nickel plated copper wire (c) Tin plated copper Aluminium

(a) Silver plated copper wire

Q22 The slack allowed in a wire bundle should not exceed (a) ½ inch (b) 1 inch (c) No slack is allowed

(a) ½ inch

Q23 In order to ensure that the correct tool was used, a blue AMP Amphenol (PIG) crimped connector should show (a) 3 Dimples on the crimped connector (b) 2 dimples on the crimped connector (c) 1 dimple on the crimped connector

(b) 2 dimples on the crimped connector

Q24 Plug pins are numbered (a ) from the outside in - clockwise ( b) from the outside in - anticlockwise ( c) from the inside out - clockwise

( c) from the inside out - clockwise

Q25 Plugs/Connectors should be separated/reconnected (a) by hand (b) Using a plumbers flexible pliers (c) By hand or using a dedicated connector wrench

Q26 What type of cable clamps can be used in fuel tanks (a) Rubber clamps (b) Plastic clamps (c) Metal Clamps

(b) Plastic clamps

1. A lightning strike will normally damage how many areas of the aircraft ? (a) One. (b) Two. (c) Three.

(b) Two.

2. The tong tester should only be used on: - (a) double cables. (b) triple cables. (c) single cables.

3. How is damaged co-axial cable repaired ? (a) With insulation tape or an insulation sleeve. (b) By making up a new cable in the workshop. (c) By removing the cable and fitting one which has the same part number.

(b) By making up a new cable in the workshop.

4. What is the first safety precaution to take when preparing to use an ohmmeter to continuity check a circuit ? (a) Ensure that the correct documentation has been referenced. (b) Ensure that the ohmmeter is serviceable. (c) Remove all power from the circuit and discharge any capacitors.

5. What is the minimum voltage rating for general aircraft wiring ? (a) 115 V. (b) 208 V. (c) 600 V.

6. An aircraft electrical installation is described as being of the "single wire type", what does this mean ? (a) That only one type of wire is used throughout the entire electrical system of the aircraft. (b) That only one wire is used to support the supply of electrical power to the user and the return path is via the metallic structure of the aircraft. (c) Only one type of wire is used throughout the electrical system of the aircraft but wires of size 0 or greater may be of aluminium conductor.

(b) That only one wire is used to support the supply of electrical power to the user and the return path is via the metallic structure of the aircraft.

7. Which one of the following items can be used when testing a live circuit for continuity ? (a) Volt meter. (b) Ohmmeter. (c) Continuity checker.

(a) Volt meter.

8. Which type of aircraft equipment must not be meggered ? (a) Relay coils. (b) Gas discharge lamps such as flourescent tubes. (c) Equipment containing semiconductors.

9. Aircraft grounding lugs normally will be found: - (a) in the electrical equipment bay. (b) located on the landing gear. (c) at the tail.

(b) located on the landing gear.

10. The number of circuits which can be completed through the poles of a switch is identified by the term: - (a) toggle. (b) throw. (c) position.

(b) throw.

11. The bonding tester is designed to have an accurate measurement of resistance in the range of 0 to: - (a) 0.01 ohms. (b) 0.1 ohms. (c) 10 ohms

(b) 0.1 ohms.

12. The maximum permissible milli-volt drop across a connection that is being tested for high resistance is: - (a) 50 mV/10 amps. (b) 30 mV/10 amps. (c) 5 mV/10 amps.

13. To prevent electrical interference of other systems, unscreened radio aerial cable should be separated from any other unscreened cable by a distance (a) 18 inches. (b) 28 inches. (c) 8 inches.

(a) 18 inches.

14. Solder will only adhere to: - (a) clean metal. (b) smooth metal. (c) rough metal.

(a) clean metal.

15. What is the maximum number of electrical wire terminals that can be installed on one stud ? (a) Two terminals per stud. (b) Three terminals per stud. (c) Four terminals per stud.

16. A relay with a moving core is usually known as a: - (a) solenoid. (b) polarised relay. (c) proximity switch.

(a) solenoid.

17. If a fuse is rated at 10 amps and is 33 A.W.G., a fuse rated at 20 amps will have a thickness of: - (a) 28 A.W.G. (b) 38 A.W.G. (c) 42 A.W.G.

(a) 28 A.W.G.

18. The target of the reed switch is a: - (a) mica strip. (b) magnet. (c) ferrous plate

(b) magnet.

19. A properly crimped cable should have good electrical: - (a) resistance. (b) insulation. (c) conductivity.

20. Two wires are connected to a common terminal. Which parts of their ATA 100 wire codes will be different ? (a) The wire number. (b) The segment letter. (c) The wire number prefix.

(b) The segment letter.

21. When a designer provides a cable, consideration must be given to the volts drop across it and its: - (a) insulation. (b) reactance. (c) r.m.s. value.

(a) insulation.

22. Circuit board edge connections are sometimes known as: - (a) finger contacts. (b) strip contacts. (c) sliding contacts.

(a) finger contacts.

23. A triaxial cable is one which has a: - (a) single shielded wire and two cores. (b) double shielded wire and a single core. (c) single shielded wire and a single core.

(b) double shielded wire and a single core.

24. A wire clamped vertically at one end and horizontally at the other end should have a bend radius of no less than a) 10 times the diameter of the wire b) 3 times the diameter of the wire c) 5 times the diameter of the wire

b) 3times the diameter of the wire

25. On a long co-ax cable how would you check for discontinuities and shorts a) Safety Ohmmeter b) Time Domain Reflectometer c) Continuity tester

b) Time Domain Reflectometer

26. (1)Electrical circuit protection devices are rated based on the amount of current that can be carried without overheating the wiring insulation. (2) A 'trip free' circuit breaker makes it impossible to manually hold the circuit closed when excessive current is flowing. Regarding those statements, a) only No. 1 is true. b) only No. 2 is true. c) both No. 1 and No. 2 are true.

c) both No. 1 and No. 2 are true.

27. When installing electrical wiring parallel to a fuel line, the wiring should be a) in metal conduit. b) in a non-conductive fire-resistant sleeve. c) above the fuel line.

c) above the fuel line.

28. Wires and cables that carry high power and/or high frequencies are shielded to prevent: (a) the wire or cable being the cause of electromagnetic interference (b) the wire or cable being affected by electromagnetic interference (c) wet arc tracking.

(a) the wire or cable being the cause of electromagnetic interference

29. Two or more separate wires within the same insulation and protective sheath is referred to as a: (a) screened wire (b) coaxial cable (c) cable.

30. Fuses have a rating that determines the: (a) maximum current it can carry without opening (b) minimum current it can carry without opening (c) time taken for the fuse to rupture

(a) maximum current it can carry without opening

31. Conductors must have low insulation resistance to minimize: (a) current surges (b) electromagnetic interference (c) IR losses.

32. The combined effects of insulation damage and fluid contamination gives rise to: (a) electromagnetic interference (b) wet arc tracking (c) current surges

(b) wet arc tracking

33. For a given AWG, the wire will have a specified: (a) diameter and hence a known conductance (b) length (c) screening.

(a) diameter and hence a known conductance

34. Coaxial cables are normally used for: (a) digital signals (b) motors and generators (c) radio-frequency (RF) signals.

35. Trip-free circuit-breaker contacts: (a) can always be closed whilst a fault exists (b) cannot be closed whilst a fault exists (c) are only used during maintenance.

(b) cannot be closed whilst a fault exists

36. Limiting resistors are connected: (a) momentarily in series (b) momentarily in parallel (c) permanently in series.

37. The white collar just below a circuit-breaker button provides visual indication of the: (a) circuit-breaker trip current (b) system being protected (c) circuit-breaker being closed or tripped.

(a) circuit-breaker trip current

38. Secondary bonding is designed for: (a) carrying lightning discharges through the aircraft (b) keeping all the structure at the same potential (c) discharging static electricity from the aircraft to atmosphere.

(b) keeping all the structure at the same potential

39. Some electrical installations use aluminium wires or cables to: (a) reduce EMI (b) save cost (c) save weight.

40. Visual inspection of wiring installations: (a) enables obvious faults to be identified and the appropriate action(s) taken (b) checks for adequate insulation resistance between conductors (c) checks the continuity of the earth return path back to the power supply(s).

(a) enables obvious faults to be identified and the appropriate action(s) taken

41. In terms of bonding, composite material has a: (a) high resistance and is unsuitable for bonding (b) low resistance and is unsuitable for bonding (c) high resistance and is suitable for bonding.

(a) high resistance and is unsuitable for bonding

42. For a given wire size, when installed in a loom it will be able to safely conduct: (a) more current compared to a wire in free circulating air (b) less current compared to a wire in free circulating air (c) the same current compared to a wire in free circulating air.

(b) less current compared to a wire in free circulating air

43. Bonding is categorized as primary or secondary determined by the: (a) use of composite or metal structure (b) locations of static wicks (c) magnitude of current being conducted.

44. The use of composite materials for aircraft structures results in: (a) less natural paths for bonding (b) more natural paths for bonding (c) higher probability of a lightning strike.

(a) less natural paths for bonding

45. Bonding is made between components and structure using: (a) coaxial cable (b) purpose-made straps (c) general-purpose wiring.

(b) purpose-made straps

46. Static electricity is discharged from the aircraft to atmosphere through: (a) composite structure (b) earth stations (c) static wicks.

Question Number. 1. In a front release connector the pin will be. Option A. released from rear and extracted from the front. Option B. released from the front and extracted from the front. Option C. released from the front and extracted from the rear.

Option C. released from the front and extracted from the rear.

Question Number. 2. A wire clamped vertically at one end and horizontally at the other end should have a bend radius of no less than. Option A. 3 times the diameter of the wire. Option B. 5 times the diameter of the wire. Option C. 10 times the diameter of the wire.

Option A. 3 times the diameter of the wire.

Question Number. 3. Glycol deicer fluid in contact with a silver cable can cause. Option A. a fire. Option B. disintegration of the cable insulation. Option C. corrosion.

Option A. a fire.

Question Number. 4. With a rear release connector, the pin will be. Option A. released from the front and extracted from the rear. Option B. released from the rear and extracted from the front. Option C. released from the rear and extracted from the rear.

Option C. released from the rear and extracted from the rear.

Question Number. 5. The maximum operating temperature for a nickel plated copper or aluminium connector is. Option A. 260°C. Option B. 135°C. Option C. 200°C.

Option A. 260°C. 135 is tin - note 1 in 135 kind of similar to t in tin

Question Number. 6. What gauge of pin would a yellow plastic insert/extract tool be used on?. Option A. 16 - 14. Option B. 12 - 10. Option C. 22 - 18.

Option B. 12 - 10.

Question Number. 7. Can the insulation grip be adjusted on a PIDG crimp tool?. Option A. No. Option B. Yes by turning a knob. Option C. Yes by adjusting the pins.

Option C. Yes by adjusting the pins.

Question Number. 8. What gauge of pin would a red plastic insert/extract tool be used on?. Option A. 12 - 10. Option B. 22 - 18. Option C. 16 - 14.

Option B. 22 - 18.

Question Number. 9. What cable would you use where temperatures are going to exceed 200°C?. Option A. Tinned copper or aluminium. Option B. Silver plated copper or aluminium. Option C. Nickel plated copper or aluminium.

Option C. Nickel plated copper or aluminium.

Question Number. 10. How long should a fireproof cable last in a fire?. Option A. 5 minutes. Option B. 50 minutes. Option C. 15 minutes.

Option C. 15 minutes.

Question Number. 11. What gauge of pin would a blue plastic insert / extract tool be used on?. Option A. 12 - 10. Option B. 16 - 14. Option C. 22 - 18.

Option B. 16 - 14.

Question Number. 12. The insulation resistance for wiring in undercarriage wheel-wells should normally be not less than. Option A. 10 megohms. Option B. 5 megohms. Option C. 2 megohms.

Option C. 2 megohms.

Question Number. 13. What causes knuckling on older type electrical cables?. Option A. Over-temperature soldering. Option B. Applying cable ties too tightly. Option C. Excessive pull through forces.

Option C. Excessive pull through forces.

Question Number. 14. To find a high resistance or open circuit, carry out. Option A. a milli-volt drop test. Option B. a continuity check. Option C. a bonding check.

Option B. a continuity check.

Question Number. 15. The maximum bonding resistance on an aircraft primary structure should be. Option A. 0.01 ohms. Option B. 0.001 ohms. Option C. 0.05 ohms.

Option C. 0.05 ohms.

Question Number. 16. Before effecting a crimp, the bare ends of a cable should be. Option A. tightly twisted. Option B. twisted lightly in the direction of the lay. Option C. straightened out.

Option B. twisted lightly in the direction of the lay.

Question Number. 17. The number of the dots impressed on the insulation of the pre-insulated connectors during crimping indicates that. Option A. the correct connector has been used. Option B. the correct tool was used to effect the connection. Option C. the crimp is properly formed.

Option B. the correct tool was used to effect the connection.

Question Number. 18. The pressure of the insulation crimp jaws on the PIDG crimping tool can be changed by. Option A. varying the torque applied to the handles. Option B. using different coloured crimping pliers and terminations. Option C. changing the position of the pins.

Option C. changing the position of the pins.

Question Number. 19. When referring to fuses, HRC means. Option A. high rupture capacity. Option B. hot running capacity. Option C. high running current.

Option A. high rupture capacity.

Question Number. 20. When wiring an electrical component to a plug, the live wire is coloured. Option A. blue. Option B. green and yellow. Option C. brown.

Option C. brown.

Question Number. 21. A hole is placed in the lowest point of electrical cable conduit. Option A. to allow for pull-through of the cables. Option B. to secure the conduit to a piece of aircraft structure. Option C. to allow for drainage of moisture.

Option C. to allow for drainage of moisture.

Question Number. 22. The minimum distance between electrical cable splices is. Option A. 3 feet. Option B. 12 inches. Option C. 500 mm.

Option C. 500 mm.

Question Number. 23. A fire resistant cable is proof tested by exposure to a standard fire for. Option A. 30 minutes. Option B. 5 minutes. Option C. 15 minutes.

Option B. 5 minutes.

Question Number. 24. When fitting coaxial cable connectors it is important to. Option A. fit the correct lock nuts. Option B. make sure the outer cup is fitted the correct way round. Option C. not damage any seals fitted.

Option C. not damage any seals fitted.

Question Number. 25. When inserting pins into a front release connector the inserting tool should be used with the gap facing which direction?. Option A. The centre of the connector. Option B. Either direction. Option C. The outside of the connector.

Option C. The outside of the connector.

Question Number. 26. When using a hydraulic crimping tool, after completing the crimping operation, the crimp is formed when when. Option A. the bypass valve opens and the ram returns to neutral. Option B. the foot pedal force is at maximum. Option C. the bypass valve closes and the ram returns to neutral.

Option A. the bypass valve opens and the ram returns to neutral.

Question Number. 27. The type of binding tape used for cables in temperatures above 260°C is which of the following?. Option A. Nomex. Option B. Teflon. Option C. Nylon.

Option B. Teflon.

Question Number. 28. What is the minimum bend radius of a loom adequately supported at a terminal block?. Option A. 10 * diameter. Option B. 8 * diameter. Option C. 3 * diameter.

Option C. 3 * diameter.

Question Number. 29. How are front release pins removed?. Option A. The tool is inserted from the front and the pin is removed from the front. Option B. The tool is inserted from the rear and the pin Is removed from the front. Option C. The tool is inserted from the front and the pin is removed from the rear.

Option A. The tool is inserted from the front and the pin is removed from the front.

Question Number. 30. If a co-axial cable clamp is over tightened so as to compress the dielectric, how will the capacitance change?. Option A. Stay the same. Option B. Increase. Option C. Decrease.

Option B. Increase.

Question Number. 31. What is the minimum bend radius of a single co-axial cable?. Option A. 10 * diameter. Option B. 8 * diameter. Option C. 6 * diameter.

Option C. 6 * diameter.

Question Number. 32. What is wet arc tracking?. Option A. A fault caused by hot stamp printing. Option B. A fault caused by insulation damage. Option C. A fault caused by 'knuckling through'.

Option A. A fault caused by hot stamp printing.

Question Number. 33. When using a heat shrink gun, what should the temperature of the gun be set to?. Option A. 100° below the heat shrink temperature. Option B. 15° below the heat shrink temperature. Option C. 100° above the heat shrink temperature.

Option C. 100° above the heat shrink temperature.

Question Number. 34. In an electrical cable 1EF6B22NMS, what does the letter E represent?. Option A. Circuit function. Option B. Cable size. Option C. Segment letter.

Option A. Circuit function.

Question Number. 35. On a coaxial cable, cable impedance is. Option A. proportional to length. Option B. not effected by length. Option C. inversely proportional to length.

Option B. not effected by length.

Question Number. 36. A secondary earth is. Option A. not less than 0.5mm cross sectional area. Option B. 18 AWG. Option C. 22 AWG.

Option B. 18 AWG.

Question Number. 37. E' on a wire, under ATA 100 is a. Option A. phase indication. Option B. system ID code. Option C. cable size.

Option B. system ID code.

Question Number. 38. To prevent wet arc tracking. Option A. cable grips should be tight. Option B. ensure hot stamp printing is controlled. Option C. cables should not be stretched.

Option B. ensure hot stamp printing is controlled.

Question Number. 39. When splicing a cable with a soldered joint, the operation is finished when. Option A. the solder has melted. Option B. the solder sleeve disappears. Option C. the solder and insulation have formed.

Option C. the solder and insulation have formed.

Question Number. 40. When manufacturing an electrical connector the unused holes are. Option A. filled with connectors. Option B. filled with connectors and blanked. Option C. covered with blanks.

Option B. filled with connectors and blanked.

Question Number. 41. Co-axial cable is preferred to airframe cable in which application?. Option A. Where the diameter of cable is not important. Option B. High frequency interference. Option C. Low frequency interference.

Option A. Where the diameter of cable is not important.

Question Number. 42. Forward release electrical connectors are removed by the wire being. Option A. pushed forwards. Option B. twisted to the right. Option C. pulled backwards.

Option C. pulled backwards.

Question Number. 43. When crimping wires, the wires should be. Option A. straight. Option B. lightly twisted. Option C. twisted.

Option B. lightly twisted.

Question Number. 44. Why are copper wires used in electrical systems?. Option A. They have high permeability. Option B. They do not give off a magnetic field. Option C. They have a low resistance to current.

Option C. They have a low resistance to current.

Question Number. 45. When crimping wires, the wire should. Option A. be flush with the crimp. Option B. extend 0.8 mm beyond the crimp. Option C. be beneath the crimp.

Option B. extend 0.8 mm beyond the crimp.

Question Number. 46. 1EF6B22 NMSV. What does the B mean?. Option A. Segment letter. Option B. Cable number. Option C. Circuit function.

Option A. Segment letter.

Question Number. 47. A white/blue insertion-extraction tool would be used on a cable of what size?. Option A. 10. Option B. 22. Option C. 16.

Option C. 16.

Question Number. 48. The value of the insulation resistance of an electric motor compared to its supply leads is. Option A. greater. Option B. same. Option C. smaller.

Option C. smaller.

Question Number. 49. According to ATA 100, a symbol code 'X' on a wiring number denotes. Option A. a warning circuit. Option B. a ground circuit. Option C. AC power.

Option C. AC power.

Question Number. 50. When securing wire after it leaves an LRU, cable bundle bends should be not less than?. Option A. minimum radius of five times the outside diameter of the cable, or cable bundle. Option B. minimum radius of three times the outside diameter of the cable, or cable bundle. Option C. minimum radius of eight times the outside diameter of the cable, or cable bundle.

Option C. minimum radius of eight times the outside diameter of the cable, or cable bundle.

Question Number. 51. When terminating an aluminium cable, what preparations would be carried out before crimping?. Option A. Degrease stripped cable. Option B. Just terminate. Option C. Apply a mixture of 50% petroleum jelly and zinc oxide.

Option C. Apply a mixture of 50% petroleum jelly and zinc oxide.

Question Number. 52. An in-line splice should be positioned on the. Option A. terminal of the loom. Option B. outside of the loom. Option C. outer surface of the loom for easy inspection.

Option C. outer surface of the loom for easy inspection.

Question Number. 53. A conductor after being crimped. The maximum amount of conductor which protrudes from the terminal end should be Option A. 1/32 inch. Option B. 1/8 inch. Option C. 1/16 inch.

Option A. 1/32 inch. Note 1/32 inch = 0.8mm

Question Number. 54. Two or more operations should be performed to strip wire with hand operated wire stripper if the total stripping length exceeds. Option A. 0.50 in. Option B. 0.75 inch. Option C. 0.25 in.

Option B. 0.75 inch.

Question Number. 55. A cable loom should be protected by conduit when fed through the. Option A. main equipment centre. Option B. wheelwell door. Option C. cargo compartment ceiling.

Option B. wheelwell door.

Question Number. 56. The size of proper conduit for electrical wires must be. Option A. 75% larger than the maximum diameter of wires. Option B. 25% larger than the maximum diameter of wires. Option C. 100% larger than the average diameter of wires.

Option B. 25% larger than the maximum diameter of wires.

Question Number. 57. Blue metal extract tool would be used with contacts sized. Option A. 16. Option B. 12. Option C. 22.

Option A. 16.

Question Number. 58. A Silver coated conductor in an unpresurised area is subject to moisture and has a damaged coating would be likely to cause. Option A. Wet Arc Tracking. Option B. Knuckling Through. Option C. Red Plague.

Option C. Red Plague.