Electrical

Question 1

What tool is used to check a motor or generator armature for shorts and opens under load conditions

Answer 1

A growler

Question 2

When using a growler what indication will occur when a short exists between an armature segment

Answer 2

the blade will begin to vibrate and chatter

Question 3

How is the output voltage of an alternator controlled

Answer 3

By varying the field current that excites the alternator

Question 4

What instrument are used to monitor electrical system loads

Answer 4

Ammeters and voltmeters

Question 5

How would you identify a specific wire in a wire bundle

Answer 5

By the identification code markings on the wire

Question 6

What tool would you use to determine the size of an unmarked wire

Answer 6

Wire gauge

Question 7

What color are the navigation lights on the wingtips

Answer 7

The left wingtip is red the right is green

Question 8

Name several types of electrical devices that would be considered intermittent loads on an electrical system

Answer 8

Landing gear, cowl and wing flap motors, radio transmitter

Question 9

Why would it be necessary to analyze an electrical system before increased the load on the system

Answer 9

determine the generator capacity, wire size, and protective device capacity will not be exceeded

Question 10

What factors should be considered when determining the wire size for a particular application

Answer 10

The system voltage, permissible voltage drop, current to be carried, wire length and whether the load is continuous or intermittent

Question 11

What is the relationship between the inside diameter of a conduit and the outside diameter of the wire bundle inside it

Answer 11

must be 25% larger than the wire bundle

Question 12

What is the maximum number of terminal lugs that can be placed on a single terminal strip stud

Answer 12

Four

Question 13

Under what condition must a switch be debated from its nominal rating

Answer 13

When used with inductive circuits, circuits with high in-rush current and with DC motors

Question 14

At what point do electric motors draw the most current

Answer 14

When starting

Question 15

Circuit breakers are designed to open before what condition occurs

Answer 15

Before the wire emits smoke

Question 16

At what point in a circuit should the protective device be located

Answer 16

As close to the power source as possible

Question 17

What type of circuit breaker may not be used in an aircraft

Answer 17

An automatic resetting type

Question 18

What part of an aircraft is identified by a white navigation light

Answer 18

The tail

Question 19

What could cause an AC electric motor to run too slowly

Answer 19

Lack of lubrication, defective wiring, or low applied voltage

Question 20

What should be done when making bonding or grounding connections between dissimilar materials

Answer 20

Use a suitable washer so that any corrosion will occur on the washer

Question 21

Prior to making a continuity check what must be done to an electrical circuit

Answer 21

The power must be turned off

Question 22

What could cause an AC electric motor run to fast

Answer 22

Excessive applied voltage or shorted field windings

Question 23

What are the three most common faults that occur in an electrical circuit

Answer 23

Open circuit

Shorted circuit

Low power in circuit

Question 24

In AC power system how is DC obtained for battery charging

Answer 24

By rectifiers

Question 25

How long should bonding jumper wires be made

Answer 25

Large enough to handle return current flow and short enough to prevent an increase in resistance

Question 26

What is a SPDT switch

Answer 26

Single switch, double throw switch

Question 27

What is meant by flashing the field of a generator

Answer 27

Restoring the residual magnetism to the frame of the generator

Question 28

What are 3 types of voltage regulators used with aircraft generators

Answer 28

Carbon-pile, solid state and vibrator