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IC World > IC Volume 1 > Flashcards

IC Volume 1 Flashcards

0
Q

What is the purpose of tags?

A

To prevent the improper operation of a component, piece of equipment, system, or portion of system when isolated or in an abnormal condition.

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1
Q

Danger- shock hazard signs are used when?

A

Voltages are between 30 and 500 volts

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2
Q

Caution tag

A

A yellow tag used as a precautionary measure to provide temporary special instructions or to indicate that unusual caution must be exercised to operate equipment.

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3
Q

Danger tag

A

Commonly called the red tag, is used to prevent the operation of equipment that could jeopardize the safety of personnel or endanger the equipment.

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4
Q

Out-of-calibration

A

Orange labels used to identify instruments that are out of calibration and will not give accurate measurements.

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5
Q

Out-of-commission

A

A red label used to identify instruments that will not indicate correct measurements because they are defective or isolated from the system.

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6
Q

What is the circuit designation of salinity cells?

A

SB

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7
Q

What is the circuit designation of anemometers?

A

HD/HE

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8
Q

What kind of electrical distribution systems found on navy ships?

A

Ungrounded

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9
Q

What is a reason for an ungrounded system?

A

An ungrounded system is to achieve max system reliability and continuity of electrical power under combat conditions.

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10
Q

What is the perfect ungrounded system?

A

It is when the insulation is perfect on all cables, switchboards, circuit breakers, generators, and load equipment; no filter capacitors are connected between ground and conductors.

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11
Q

The more resistance the…

A

Better the system is insulated; therefore, less current will flow between the conductor and the ground.

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12
Q

What are interlock switches?

A

Used to prevent technical and maintenance personnel from coming into contact with electrical potentials in excess of 30V

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13
Q

Isolated receptacle circuits are used to?

A

Help reduce the inherent hazard of leakage currents where portable tools and appliances are plugged in and out.

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14
Q

Safety gloves with label color red

A

Class 0

1,000V

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15
Q

Safety gloves color label white

A

Class 1

7,500V

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16
Q

Safety gloves color label yellow

A

Class 2

17,000V

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17
Q

Safety gloves color label green

A

Class 3

26,500V

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18
Q

CO2 gas extinguisher

A

Effective on any type of fire, particularly electrical fires

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19
Q

PKP

A

(Potassium bicarbonate) very effective on class Bravo fires. Not recommended for electrical fires because it causes corrosion of electrical components.

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20
Q

Soda-acid

A

Effective only on class A fires. Not recommended for electrical fires- acts as a conductor, not effective on burning compounds.

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21
Q

Foam

A

Very effective on burning compounds such as oil and similar minerals. Not satisfactory for electrical fire; good conductor or electricity.

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22
Q

Halon 1301

A

Effective on all classes of fire except class D. It is colorless, odorless gas the does not conduct electricity or leave residue.

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23
Q

1 milliamperes (0.001 amp)

A

Shock is possible

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24
Q

10 milliamperes (0.01 amp)

A

Lose voluntary control of muscles

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25
Q

100 milliamperes (0.1 amps)

A

Shock usually fatal if it is sustained for 1 second or more

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26
Q

Abrasions

A

Skin is rubbed or scrapped off

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27
Q

Incisions

A

Wounds made with a sharp instrument such as knives or razors.

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28
Q

Lacerations

A

Wounds are torn rather than cut

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29
Q

Punctures

A

Objects that penetrate into the tissue leaving an opening

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30
Q

Never place a meter near?

A

A strong magnetic field

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31
Q

What are lead-acid batteries used for?

A

Emergency power source power source for IC systems

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32
Q

What equipment are lead-acid batteries commonly used in?

A

Gyrocompasses and automatic telephone exchanges

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33
Q

What are Alkaline storage batteries used for?

A

Bus failure alarms

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34
Q

Types of batteries

A

Lead-acid
Alkaline
Dry-cell batteries

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35
Q

Cable marking meaning for C-

A

Interior communications

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36
Q

Cable marking meaning for D-

A

Degaussing

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37
Q

Cable marking meaning for G-

A

Fire control

38
Q

Cable marking meaning for L-

A

Ships service lighting

39
Q

Cable marking meaning for N-

A

Navigational lighting

40
Q

Cable marking meaning for P-

A

Ships service power

41
Q

Cable marking meaning for R-

A

Electronics

42
Q

Cable marking meaning for CP-

A

Casualty Power

43
Q

Cable marking meaning for EL-

A

Emergency Lighting

44
Q

Cable marking meaning for EP

A

Emergency Power

45
Q

Cable marking meaning for FL-

A

Night Flight

46
Q

Cable marking meaning for MC-

A

Coolant pump power

47
Q

Cable marking meaning for MS-

A

Minesweeping

48
Q

Cable marking meaning for PP-

A

Propulsion Power

49
Q

Cable marking meaning for SF-

A

Special Frequency Power

50
Q

What temp can you operate lead-acid battery?

A

Operate lower than 125

Store below 96

51
Q

Continuity on a multimeter

A

If continuity exist the meter beeps twice if it is in touch hold mode

52
Q

Fuses

A

A protective device used to open an electric circuit when current flow exceeds a safe value.

53
Q

Cartridge fuse

A

Consists of a zinc-alloy link enclosed in a fiber, plastic, ceramic, or glass cylinder

54
Q

Solenoids

A

Used for electrically operating hydraulic valve actuator, carbon pile voltage regulators, power relays, and mechanical clutches.

55
Q

Advantage of using solenoids?

A

It’s mechanical movement can be accomplished at a considerable distance from the control.

56
Q

What are power relays?

A

Also known as contractors, use relatively small amount of electrical power to control the switching of a large amount of power.

57
Q

Series type relays

A

Operated by circuit current flowing through the coil or coils

58
Q

What is a control relay?

A

Usually known as a simple relay. Frequently used in the control of low-power circuits or other relays.

59
Q

What is a clapper relay?

A

Has multiple sets of contacts. As the circuit is energized, the clapper is pulled to a magnetic coil.

60
Q

Thermal time delay relay

A

Constructed to produce a delay action when energized.

61
Q

Latch-in relay

A

Designed to lock the contacts in the de-energized position until the relay is either manually or electrical reset.

62
Q

AC shunt relay

A

The basic function of the relay is to make or break an electrical control circuit when the coil is energized.

63
Q

Primary factors in causing heat stress conditions

A

Excessive steam and water leaks
Boiler air casing leaks
Missing or deteriorated lagging on steam piping, valves, and machinery

64
Q

Double hearing protection should be worn when

A

Noise levels are greater than 104db

65
Q

hearing protection should be worn when

A

Noise levels are greater than 84db

66
Q

Circuit breaker purposes

A
  • to provide circuit protection
  • to preform normal switching operations
  • to isolate a defective circuit while repairs are being made
67
Q

Overload relays

A

Provided in motor controllers to protect the motor from excessive currents

68
Q

Types of thermal overload relays

A
  • bimetal type
  • single metal type
  • induction type
69
Q

Types of cables

A
  • watertight cables
  • armored cables
  • non- flexing service
70
Q

Watertight cables

A

Standard cable in which all spaces under the impervious sheath are filled with material. Prevents the flow of water through the cable if one end of the cable is exposed to water under pressure.

71
Q

Armored cable

A

Cable that has an outer shield of braided aluminum or steel.

72
Q

Types of general use cables

A
  • LSDSGA 3
  • LSDCOP 2
  • LSMSCA 30
73
Q

LSDSGA 3

A

Low smoke, double conductor, shipboard, general use, armored, conductor size approximately 3000 circular coils.

74
Q

LSDCOP 2

A

Low smoke, double conductor, oil resistant, portable, conductor size approximately 2000 circular mils

75
Q

LSMSCA 30

A

Low smoke, multiple conductor, shipboard, control armored, 30 conductors

76
Q

Watertight with circuit integrity non- flexing service is used for?

A
  • power and lighting
  • control
  • electronic, communication, and instrumentation
77
Q

Watertight, non- flexing service is used for?

A
  • power and lighting

- electronic, communication, and instrumentation

78
Q

Non-watertight with circuit integrity, non- flexing service is used for?

A

-electronic, communication, and instrumentation

79
Q

Non-watertight, non- flexing service

A
  • power and lighting
  • control
  • electronic, communication, and instrumentation
80
Q

Non-watertight, flexing service

A
  • power and lighting
  • control
  • electronic, communication, and instrumentation
81
Q

When you are working on energized equipment, what safety procedures should you follow?

A

Make sure to have a CPR qualified person there

82
Q

Fiber optics is what?

A

The study of light, its composition, how it travels, it’s effect on objects, and how it enables us to see

83
Q

What are the three parts of fiber optics?

A

Core
Cladding
Buffer

84
Q

How many microns does the buffer have?

A

900

85
Q

How many microns does the acrylate coating have?

A

250

86
Q

How many microns does the cladding (glass) have?

A

125

87
Q

How many microns does the core (glass) have?

A

8-10 (sm)
50 (mm)
62.5 (mm)

88
Q

Fiber core

A

Optical Transmision path, will be denser than the cladding in order to minimize the loss of light.

89
Q

Fiber cladding

A

Surrounds the core and provides the reflective surface that allows light to propagate along the core to the distance end.

90
Q

Fiber coating

A

Usually one or more layers of polymer or acrylate material

91
Q

IC systems that are essential to the safety of the ship and ship personnel are assigned what readiness classification?

A

Class 1

92
Q

What are the three permanently installed power distribution systems aboard ship?

A

Emergency
Casualty
Ships service

93
Q

Most AC power distribution systems are rated at?

A

450 volts
3- phase
60 hz
3- wire ungrounded system

IC World (5 decks)

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