Book #1

Question 1

What type of wire, when ran in free air, can carry the most current?

Answer 1

Bare Copper

Question 2

What secondary terminal should be grounded?

Answer 2

X0

Question 3

The proper method of cutting the armored covering off armored cable is:

Answer 3

Diagonally across the weave with a hacksaw

Question 4

Anti-short bushings are used for protecting conductors in

Answer 4

AC

Question 5

A device for measuring the diameter of a motor shaft is:

Answer 5

Micrometer

Question 6

What is used to prevent scaffolding from toppling due to high center of gravity

Answer 6

Outriggers

Question 7

A point in the wiring system where current is taken to supply utilization equipment is called:

Answer 7

An outlet

Question 8

A three phase supply may be obtained by using two transformers if:

Answer 8

An open delta connection is used

Question 9

The functions of grease in the bearings of an electrical motor is to:

Answer 9

Reduce heat from mechanical friction

Question 10

What is the proper termination procedure when installing free air rated single conductors for a feeder installation with a calculated load of 400 amps

Answer 10

Aluminum to Aluminum Plates

Question 11

While working at a motor control center, a 208 volt magnetic starter for a 15 HP motor is humming louder than the adjacent starters. Which component requires repair?

Answer 11

Shading Coil

Question 12

Service conduit connected to an underground supply system shall be sealed with a suitable compound to prevent:

Answer 12

the entrance of moisture

Question 13

Three way switches may be connected only in

Answer 13

the ungrounded circuit conductor

Question 14

What is another term for root means square

Answer 14

Effective Value

Question 15

What type of single phase motor would best be suited to be used for a domestic refrigerator?

Answer 15

Capacitor start

Question 16

An ohmmeter is connected across a discharged capacitor anf the needle stabalizes at approximately 100K ohms. The Cap is?

Answer 16

Leaky
shorted = Zero
Good= infinite

Question 17

A 75 KVA outdoor, pole mounted transformer is usually cooled by means of:

Answer 17

Refined mineral oil

Question 18

A shading coil in a magnetic switch is intended to:

Answer 18

reduce chattering

Question 19

An atom that has lost or gained electrons:

Answer 19

is said to be ionized

Question 20

What two quantities comprise the total power of an AC circuit?

Answer 20

True power and reactive power

Question 21

A DC generator is a rotating machine that converts:

Answer 21

Mechanical energy to electrical energy

Question 22

The centrifugal switch in a single phase motor serves the purpose of:

Answer 22

opening the start winding when the motor has almost reached running speed

Question 23

A safety precaution to follow when using a potential transformer is to:

Answer 23

Ground the secondary

Question 24

The drawings most often used in maintenance work are:

Answer 24

Schematics and wiring diagrams

Question 25

The type of diagram that is consulted to find location and interconnection of parts is called a:

Answer 25

Wiring Diagram