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AIRFRAME Flashcards

1
Q

Which of the following are found in laminated integral electrically windshield system

A

4

- Autotransformer, - heat control relay, -heat control toggle system, and - indicating light

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2
Q

What nondestructive checking method is normally used to ensure that the correct amount of swaging has taken place when installing swaged-type terminals on A/C control cable

A

Use a terminal gauge to check the diameter of the swaged portion of the terminal

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3
Q

The dihedral of a wing may be measured by placing a straightedge and level protractor on the

A

Front spar

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4
Q

What is the minimum edge distance allowed for aluminum alloy single lap sheet splices containing a single row of rivets as compared to a joint with multiple rows, all rivets being equal in diameter

A

The minimum edge distance for the single row is equal to that for the multiple row

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5
Q

Which rivet is used for riveting nickel alloys

A

Monel

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6
Q

Where is the landing gear safety switch usually located

A

On the main gear shock strut

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7
Q

Internal leakage in a brake master cylinder unit can cause

A

The pedal to slowly creep down while pedal pressure is applied

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8
Q

After installation of a rebuilt hydraulic hand pump, it is found that the handle cannot be moved in the pumping direction (pressure stroke). The most likely cause is an incorrectly installed

A

Hand pump outport check valve

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9
Q

A/C flight control trim systems must be designed and installed so that the

A

Pilot can determine the relative position of the trim tab from the cockpit

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10
Q

(Fig 14) 1 hour after an oxygen system was charged for a leakage check, the oxygen pressure gauge read 460 psi @ 63 F; 6 hours later the temperature was 51 F. (A 5 psi change is the maximum allowable in a 6 hour period). What pressure gauge readings would be acceptable to remain within the allowable limits?

A

445 to 450 psi

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11
Q

The addition of avionics and associated antenna systems forward of the CG (center of gravity) limit will effect

A

Empty weight and useful load

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12
Q

Which of the following connects vacuum to the deicer boots when the systems is not in operation, to hold the boots tightly against the leading edges in flight

A

Distributor valve

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13
Q

Which statement concerning the 100 hour inspection of an airplane equipped with a push pull type control system is true

A

The threaded rod ends should be checked for the amount of thread engagement by means of the inspection hole provided

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14
Q

Bonding connections should be tested for

A

Resistance value

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15
Q

A relay is

A

A magnetically operated switch

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16
Q

(Fig. 10) The trunnion nut on an aircraft landing gear requires a torque of 320 inch pounds. To reach the nut, a 2 inch straight adapter must be used on an 18 inch torque wrench. How many foot pounds will be indicated on the torque wrench when the required torque of the nut is reached

A

24

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17
Q

What is one advantage of piston type hydraulic motors over electric motors

A

There is no fire hazard if the motor is stalled

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18
Q

The type of electric wire terminals used for most A/C applications in addition to providing good current carrying capabilities are designed primarily

A

To prevent circuit failure due to terminal disconnection

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19
Q

Which is considered good practice concerning the installation of acrylic plastics

A

When rivets are used, adequate spacer or other satisfactory means to prevent excessive tightening of the frame to the plastic should be provided

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20
Q

When patching a plywood skin, abrupt changes in cross sectional areas which will develop dangerous stress concentration should be avoided by using

A

Circular or elliptical patches

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21
Q

Fiberglass laminate damage that extends completely through one facing and into the core

A

Requires the replacement of the damaged core and facing

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22
Q

Select the alternative which best describes the function of the flute section of a twist drill

A

Forms the cutting edges of the drill point

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23
Q

The oxyacetylene flame for silver soldering should be

A

Neutral

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24
Q

A/C flight control trim systems must be designed and installed so that the

A

Pilot can determine the relative position of the trim tab from the cockpit

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25
Q

The addition of avionics and associated antenna systems forward of the CG (center of gravity) limit will effect

A

Empty weight and useful load

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26
Q

Which of the following connects vacuum to the deicer boots when the systems is not in operation, to hold the boots tightly against the leading edges in flight

A

Distributor valve

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27
Q

Which statement concerning the 100 hour inspection of an airplane equipped with a push pull type control system is true

A

The threaded rod ends should be checked for the amount of thread engagement by means of the inspection hole provided

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28
Q

Bonding connections should be tested for

A

Resistance value

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29
Q

A relay is

A

A magnetically operated switch

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30
Q

(Fig. 10) The trunnion nut on an aircraft landing gear requires a torque of 320 inch pounds. To reach the nut, a 2 inch straight adapter must be used on an 18 inch torque wrench. How many foot pounds will be indicated on the torque wrench when the required torque of the nut is reached

A

24

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31
Q

What is one advantage of piston type hydraulic motors over electric motors

A

There is no fire hazard if the motor is stalled

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32
Q

The type of electric wire terminals used for most A/C applications in addition to providing good current carrying capabilities are designed primarily

A

To prevent circuit failure due to terminal disconnection

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33
Q

Which is considered good practice concerning the installation of acrylic plastics

A

When rivets are used, adequate spacer or other satisfactory means to prevent excessive tightening of the frame to the plastic should be provided

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34
Q

When patching a plywood skin, abrupt changes in cross sectional areas which will develop dangerous stress concentration should be avoided by using

A

Circular or elliptical patches

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35
Q

Fiberglass laminate damage that extends completely through one facing and into the core

A

Requires the replacement of the damaged core and facing

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36
Q

Select the alternative which best describes the function of the flute section of a twist drill

A

Forms the cutting edges of the drill point

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37
Q

The oxyacetylene flame for silver soldering should be

A

Neutral

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38
Q

In installations where the ammeter is in the generator or alternator lead, & the regulator system does not limit the maximum current that the generator or alternator can deliver, the ammeter can be redlined at what percent of the generator or alternator rating

A

100%

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39
Q

Which repair would require a landing gear retraction test ?

A

Gear downlock microswitch

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40
Q

A universal propeller protractor used to measure the degrees of aileron travel should be zeroed

A

With aileron in the neutral position

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41
Q

A radar altimeter determines altitude by

A

Transmitting a signal and receiving back a reflected signal

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42
Q

Which instruments are connected to an A/C’s static pressure system only?

A

Vertical speed indicator & altimeter

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43
Q

Washing in the left wing of a monoplane, for purposes of rigging corrections after flight test, will have what effect on the lift and drag of what wing ?

A

Both drag and lift will increase due to increased angle of attack (AOA)

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44
Q

An airplane which has good longitudinal stability should have a minimum tendency to

A

Pitch

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45
Q

When considering an alteration, the criteria upon which the selection of electric cable size should be based are

A

Current carrying capacity and allowable voltage drop

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46
Q

An antiskid system is

A

An electrohydraulic system

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47
Q

The proper fire extinguishing agent to use on an A/C brake fire is

A

Dry powder chemical

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48
Q

Chattering of the hydraulic pump during operation is an indication

A

That air is entering the pump

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49
Q

Acetylene at a line pressure above 15 PSI

A

Is dangerously unstable

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50
Q

Where is fuel pressure taken for the pressure warning signal on most A/C engines

A

Fuel pressure line of the carburetor

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51
Q

Very often, repairs to a control surface require static rebalancing of the control surface. Generally, flight control balance condition may be determined by

A

The behavior of the trailing edge when the surface is suspended from its hinge points

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52
Q

Light reflection smoke detectors

A

Sense light reflected from smoke particles passing through a chamber

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53
Q

In some A/C with several fuel tanks, the possible danger of allowing the fuel supply in one tank to become exhausted before the selector valve is switched to another tank is prevented by the installation of

A

Fuel pressure warning signal system

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54
Q

If control cables are adjusted properly and the control surfaces tend to vibrate, the probable cause is

A

Worn attachment fittings

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55
Q

What type of remote reading fuel quantity indicating system has several probes installed in each fuel tank

A

Electronic

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56
Q

The oxyacetylene flame used for aluminum welding should be

A

Be neutral and soft

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57
Q

The classification for fiberglass reinforcement material that has high resistivity and the most common is

A

“ E “ stands for electrical glass

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58
Q

A/C which operate only AC generators (alternators) as a primary source of electrical power normally provide current suitable for battery charging through the use of

A

Step-down transformer and a rectifier

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59
Q

When installing pneumatic surface bonded type deicer boots

A

Remove all paint from the area to be covered by the deicer boot

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60
Q

The types of extinguishing agents for A/C interior fires are

A

4

  • Water
  • Dry chemical
  • Carbon dioxide
  • Halogenated hydrocarbons
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61
Q

What is the approximate drag load on an antenna with a frontal area of .137 square feet installed on an A/C with a speed of 275 mph

A

3.387 pounds

D= .000327 X A X V2

D = .000327 x ( .137 ) x 275 2 = 3.387

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62
Q

What is the condition of the refrigerant as it leaves the evaporator of a vapor cycle cooling system

A

Low pressure vapor

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63
Q

The air cycle cooling system produces cold air by

A

Extracting heat energy across an expansion turbine

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64
Q

Which section of a turbine engine provides high pressure bleed air to an air cycle machine for pressurization and air conditioning

A

Turbine compressor

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65
Q

What is normally used to bond non continuous stainless steel A/C components

A

Copper jumpers

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66
Q

Which channel of an autopilot detects changes in pitch attitude of an A/C

A

Elevator

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67
Q

A fully integrated autopilot controls the A/C around how many axis

A

3

  • Longitudinal axis (roll)
  • Lateral axis (pitch)
  • Vertical (yaw)
68
Q

The over voltage control automatically protects the generator system with excessive voltage is present by

A

Opening the shunt field circuit

69
Q

The pin section of an AN/MS connector is normally installed on

A

The ground side of a circuit

70
Q

When adding a rheostat to a light circuit to control the light intensity, it should be connected in

A

Series with the light

71
Q

An A/C integral fuel tank in

A

Is part of the A/C structure

72
Q

After installation of a rebuilt hydraulic hand pump, it is found that the handle cannot be moved in the pumping direction (pressure stroke). The most likely cause is an incorrectly installed

A

Hand pump output check valve

73
Q

Why are centrifugal type boost pumps used in fuel systems of A/C operating at high altitude

A

To supply fuel under pressure to engine driven pumps

74
Q

Movement about the longitudinal axis (roll) in a helicopter is effected by movement of the

A

Cyclic pitch control

75
Q

How would an airspeed indicator be marked to show the best rate of climb speed (one engine inoperative)

A

A blue radial line

76
Q

Which of the following would be most useful to locate and troubleshoot an internal fuel leak in an A/C fuel

A

A fuel system schematic

77
Q

If no scratches are visible after transparent plastic enclosure materials have been cleaned, their surfaces should be

A

Covered with a thin coat of wax

78
Q

A fuel pressure warning switch contacts close and warning light is turned on when

A

The fuel pressure drops below specified limits

79
Q

The primary function of the flap overload valve is to

A

Prevent the flaps from being lowered at airspeeds which would impose excessive structural loads

80
Q

Excessive wear on both of the sides of a control cable pulley groove is evidence of

A

Pulley misalignment

81
Q

A DD rivet is heat treated before use to

A

Soften to facilitate riveting

82
Q

A pressurization controller uses

A

3

  • Barometric pressure
  • cabin altitude
  • cabin rate of change
83
Q

Rivet gauge, or traverse pitch, is the distance between the

A

Centers of rivets in adjacent rows

84
Q

What does a rectifier do

A

Changes alternating current (AC) into direct current (DC)

85
Q

What is a cause of generator brush arcing

A

Low spring tension

86
Q

When checking a freon system, a steady stream of bubbles in the sight gauge indicates the charge is

A

Low

87
Q

Which of the following regulates the vacuum of the air pump to hold the deicing boots deflated when the pneumatic deicing system is off

A

Suction relief valve

88
Q

The cabin pressure of an A/C in flight is maintained at the selected altitude by

A

Controlling the rate at which air leaves the cabin

89
Q

What is the condition of the refrigerant as it enters the evaporator of a vapor cycle cooling system

A

Low pressure liquid

90
Q

In a hovering helicopter equipped with a tail rotor, directional control is maintained by

A

Varying the pitch of the tail rotor blades

91
Q

When approved, splices may be used to repair manufactured harnesses or installed wiring. The maximum # of splices permitted between any two connections is

A

One

92
Q

An emergency locator transmitter (ELT) battery must be capable of furnishing power for signal transmission for at least

A

48 hours

93
Q

Why are the iron cores of most coils laminated

A

To reduce the effects of eddy currents

94
Q

What is one check for proper operation of a pitot/static tube heater after replacement

A

Ammeter reading

95
Q

What is the primary purpose of the crossfeed system

A

To allow the feeding of any engine from any tank

96
Q

The strength and stiffness of a properly constructed composite buildup depends primarily on

A

The orientation of the plies to the load direction

97
Q

Internal leakage in a brake master cylinder unit can cause

A

The pedal to slowly creep down while pedal pressure is applied

98
Q

Where is the landing gear safety switch usually located

A

On the main gear shock strut

99
Q

A turn coordinator instrument indicates

A

Both roll and yaw

100
Q

One of the main advantages of skydrol is it’s

A

Wide operating temperature

101
Q

The function of the condenser in a freon cooling system is to

A

Transfer heat from the freon gas to ambient air

102
Q

Where is information found concerning acceptable species substitutions for wood materials used in A/C repair

A

AC 43 -13 -1B

103
Q

Dihedral angle of a wing may be measured by placing a straightedge and level protractor on the

A

Front spar

104
Q

To be eligible for recharging, a DOT 3HT oxygen cylinder must have been hydrostatically tested every 3 years and be retired from service after

A

24 years or 4380 filling cycles

105
Q

Which of the following connects vacuum to the deicer boots when the systems is not in operation, to hold the boots tightly against the leading edges in flight

A

Distributor valve

106
Q

Which seals are used with petroleum base hydraulic fluids

A

Buna-n

107
Q

The sharpest bend that can be placed in a piece of metal with out critically weakening the part is called the

A

Minimum radius of bend

108
Q

What type of valve is used in the brake actuating line to isolate the emergency brake system from the normal power brake control valve system

A

Shuttle valve

109
Q

Shallow scratches in sheet metal may be repaired by

A

Burnishing

110
Q

What is the primary purpose of an autopilot

A

To relieve the pilot of control of the A/C during long periods of flight

111
Q

What method is usually employed to control the temperature of an anti icing system using surface combustion heaters

A

Thermo cycling switches

112
Q

Where electric cables must pass through holes in bulkheads, formers, ribs, firewalls, etc., the wires should be protected from chafing by

A

By using a suitable grommet

113
Q

In an electronic type fuel quantity indicating system, the tank sensing unit is a

A

Capacitor

114
Q

Oil canning of the sides of aluminum or steel electrical junction boxes is considered to be

A

Shorting hazard

115
Q

The sight line on a sheet metal flat layout to be bent in a cornice or box is measured and marked

A

One radius from the bend tangent line that is placed under the brake

116
Q

When servicing an air conditioning system that has lost all of its freon, it is necessary to

A

Check oil and add as necessary, evacuate the system, and and add freon

117
Q

One purpose of the freewheeling unit required between the engine and the helicopter transmission is to

A

Automatically disengage the rotor from the engine in case of an engine failure

118
Q

The inductor type inverter output voltage is controlled by the

A

DC stator field current

119
Q

If the control stick of an A/C with properly rigged flight controls is moved forward (fwd.) and to the right, the left aileron will move

A

Down and the elevator will move down

120
Q

Which of the following is most likely to cause thermal runaway in a nickel cadmium battery

A

Excessive current draw from the battery

121
Q

When flags such as NAV, HDG, or GS are displayed on an HSI, the indication is

A

That the function is inoperative

122
Q

Which characteristics apply to A\C hydraulic systems

A

3
- minimum maintenance requirements

  • lightweight
  • simple to inspect
123
Q

Why does the fenwal fire detection system use spot detectors wired parallel between two separate circuits

A

A short may exist in either circuit without causing a false fire warning

124
Q

Movement of an airplane along its lateral axis (roll) is also movement

A

Around or about the longitudinal axis controlled by the ailerons

125
Q

When dope proofing the parts of the A/C structure that came in contact with doped fabric, which of the following provide an acceptable protective coating

A

Aluminum foil
and
Cellulose tape

126
Q

Long range navigation (LORAN) systems determines A/C location by

A

Means of pulsed signals from ground stations

127
Q

Composite inspections conducted by means of acoustic emission monitoring

A

Pick up the “ noise “ of corrosion or other deterioration occurring

128
Q

An A/C pressurization cycle is normally considered to be

A

One complete series of events or operations that recur regularly

129
Q

How is a shunt wound DC generator connected

A

Both fields are shunted across the armature

130
Q

What is likely to occur if unhydrated wash primer is applied to unpainted aluminum and then about 30 to 40 minutes later a finish topcoat, when the humidity is low

A

Corrosion

131
Q

What maintains normal windshield temperature control in an electrically heated windshield system

A

Thermistors

132
Q

What should be used to melt the ice in a turbine engine if the compressor is immobile because of ice

A

Hot air

133
Q

The only practical method of maintaining a constant voltage output from an A/C generator under varying conditions of speed and load is to vary the

A

Strength of the magnetic field

134
Q

The poles of a generator are laminated to

A

Reduce eddy current losses

135
Q

Fairleads should never deflect the alignment of a cable more than

A

3 degrees

136
Q

The cabin pressurization modes of operation are

A

3 (D- U- I)

  • Differential
  • unpressurized
  • isobaric
137
Q

Which statement concerning soldering is correct

A

Joints in electric wire to be soldered should be mechanically secure prior to soldering

138
Q

Turbine engine exhaust gas temperatures are measured by using

A

Chromel / alumel thermocouples

139
Q

What physical factors are involved in the aspect ratio of airplane wings

A

Span and chord

140
Q

Aluminum wire must be stripped very carefully because

A

Individual strands will break easily after being nicked

141
Q

Major adjustments on equipment such as regulators, contractors, and inverters are best accomplished outside the airplane on test benches with necessary instruments and equipment. Adjustment procedure should be as outlined by

A

The equipment manufacturer

142
Q

In a gaseous oxygen system, which of the following are vented to blow out plugs in the fuselage skin

A

Pressure relief valves

143
Q

The cabin pressure control setting has a direct influence upon the

A

Outflow valve opening

144
Q

A/C pressure fueling systems instructional procedures are normally placarded on the

A

Fuel control panel access door

145
Q

When routing a fuel line between two rigidly mounted fittings the line should

A

Have at least one bend between such fittings

146
Q

Which statement is true in regard to welding heat treated magnesium

A

The welded section does not have the strength of the original metal

147
Q

What type of selector valve is one of the most commonly used in hydraulic systems to provide for simultaneous flow of fluid into and out of a connected actuating unit

A

Four port, closed center valve

148
Q

True or false

A/C instruments are color-coded to direct attention to operational ranges and limitations

A

True

149
Q

If a brake debooster is used in a brake system, it’s position in the system will be

A

Between the brake control valve and the brake actuating cylinder

150
Q

Two possible sources of heat for the operation of a wing thermal anti-icing system are

A

Combustion heater and exhaust gases

151
Q

What icing condition may occur when there is no visible moisture present

A

Carburetor ice

152
Q

In the diluter demand oxygen regulator, when does the demand valve operate

A

When the user breathes

153
Q

A/C instruments should be marked and graduated in accordance with (IAW)

A

The specific A/C maintenance or flight manual

154
Q

An A/C oxygen bottle may be considered airworthy if it has been hydrostatically tested and identified

A
  • the test date
  • DOT number
  • serial number stamped on the cylinder near the neck
155
Q

What is the main purpose of servo in an autopilot system

A

Move the control surface as commanded

156
Q

Which of the following are characteristics of a chemical or solid state oxygen system

A
  • A volume storage capacity about 3 times that of compressed oxygen
  • The system generators are inert below 400 degrees F even under severe impact
157
Q

Two types of hydraulic fluids currently being used in civil A/C are

A
  • Mineral base and phosphate ester base
158
Q

Hydraulic system accumulators serve which of the following functions

A

3

  • Dampen pressure surges
  • Supplement the system pump when demand is beyond the pump’s capacity
  • Store power for limited operation of components if the pump is not operating
159
Q

A landing gear position and warning system will provide a warning in the cockpit when the throttle is

A

Retarded and gear is not down and locked

160
Q

What should be checked when a shock strut bottoms during a landing

A

Fluid level

161
Q

The primary purpose of stall strips is to

A

Stall the inboard portion of the wings first

162
Q

Microswitches are used primarily as limit switches to

A

Control electrical units automatically

163
Q

A common cause of slow actuation of hydraulic components is

A

Internal leakage in the actuating unit

164
Q

Phosphate ester base hydraulic fluid is very susceptible to contamination from

A

Water in the atmosphere

165
Q

How may the antiknock characteristic of a fuel be improved

A

By adding a knock inhibitor

166
Q

A fully charged hydraulic accumulator provides

A

A source for additional hydraulic power when heavy demands are placed on the system

A & P (1 decks)

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