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Electrical Test > Electrical Test > Flashcards

Electrical Test Flashcards

1
Q

In single phase AC motors what are starting capacitors used for?

A

To cause a phase shift between the windings

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2
Q

Collision lights and position lights should or should not be connected to the same switch?

A

No

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3
Q

Is the rotor in the ac induction motor connected to an external circuit electrically?

A

No

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4
Q

Are automatic circuit breakers used on Aircraft?

A

No

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5
Q

Conduit and dusting cables with talc reduce …..?

A

Potential damage

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6
Q

Synchronous AC motor speed by frequency of current

A

The motor speed is determined by frequency of input current

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7
Q

What type of wire terminals?

A

Ring type not U type

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8
Q

In motors, the counter EMF ___ the applied EMF

A

Opposes

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9
Q

How are volt meters connected?

A

Parallel to load

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10
Q

In AC electric motors friction in bearings cause

A

Cause power loss

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11
Q

normal rating x derating factor (high inrush current)

A

Derated switches used with high inrush current

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12
Q

Aircraft electrical strand-ed wire is more ____ and less ____

A

More flexible / less fatigue

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13
Q

Universal motor AC / DC use grommets ___ or less from ___

A

3/8 “ or less from edge

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14
Q

Wire bundles ____” min from ____ ____

A

1/2 inch min from control cables

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15
Q

How are amp meters connected?

A

In series

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16
Q

Motor brakes are applied by a ___ which is released by ____

A

Spring / released by magnet

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17
Q

Residual voltage is caused by __

A

Magnetism in field shoes

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18
Q

Type of test equipment (LED readout) :

A

B.I.T.E (built in test equipment) types of BITE: avtosyn, magnesyn, selsyne

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19
Q

In electric motors the ___ reverses the ____ of input current.

A

The communtator reverses the polarity of input current

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20
Q

In electric generator, the _____ reverses the polarity of ___ current

A

The communtator reverses the polarity of output current

21
Q

Dc motor rotation reversed by

A

Changing the polarity of field of armature

22
Q

____ disengage motor from load

A

Clutches

23
Q

Reversible split field motor means it has ____sets of field windings (spdt?)

A

2 sets of field windings Single Pole Double Throw

24
Q

Junction box in fire zone is composed of what metal

A

Stainless steel

25
Q

What stud size used for electrical terminal strip

A

Size #10 stud

26
Q

Which are put in series and which are put in parallel:

Rheostat
Switch
Potentiometer
Position lights

A

In series: rheostat / switch
In parallel: potentiometer / position lights

27
Q

What is used to protect from too much current?

A

Circuit breakers

28
Q

Intermittent duty means less than ___ min

A

2 minutes

29
Q

Wire identifying codes are :

A

Identifying marks printed every 15 inches

30
Q

Megometer used to measure ___ resistance

A

High resistance

31
Q

Compound motor operates the

A

Hydraulic pump

32
Q

Diode checking when disconnected from

A

Disconnected from circuit

33
Q

Switch nominal rating when

A

Contacts closed

34
Q

____ spray cools the generator

A

CSD OIL SPRAY

35
Q

How many splices per segment

A

1 for every 2 terminals

36
Q

Current limiter reduces generator voltage when

A

Safe current load is exceeded ( Prepware says can take overload for short period )

37
Q

A conduit is used for ___

A

Mechanical protection

38
Q

Transformers are used for

A

Step up / step down AC voltage

39
Q

An AC induction motor slip has percent difference in

A

Speed of stator and rotor fields

40
Q

What prevents radio interference

A

(BRASS) Conduit

41
Q

Conduit has no end fittings it has

A

Flared ends

42
Q

What can be used for circuit protection

A

Current limiters / fumes / circuit breakers

43
Q

Wire selection criteria based on

A

Current capacity and voltage drop

44
Q

What are the color codes and their respective wire size (used for crimp terminals)

A

22-18 RED

14-16 BLUE

10-12 YELLOW

45
Q

An amp meter in generator output lead with no current limiter gives you the ______ rating

A

100% of generator rating

46
Q

Derating factor is used to

A

Obtain a reasonable switch efficiency and service life

47
Q

What are the colors of aircraft position lights

A

White = tail

Red = left

Green = right

48
Q

Can wires be under flammable fluid lines?

A

NOOOO must be OVER

49
Q

Stator is ___ in armature

A

Stationary in armature

Electrical Test (1 decks)

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