Kaitlyn Hickey
Quiz by , created more than 1 year ago

Quiz on ER-2241, created by Kaitlyn Hickey on 14/02/2018.

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Kaitlyn Hickey
Created by Kaitlyn Hickey about 6 years ago
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ER-2241

Question 1 of 29

1

Suitable brush pressure for DC generators is usually between_____

Select one of the following:

  • 1 & 2 psi

  • 2&3 psi

  • 3&4 psi

  • 4&5 psi

Explanation

Question 2 of 29

1

In the case of a generator, the voltage regulation is determined by the resistance of the _______

Select one of the following:

  • Field winding

  • Shunt winding

  • Armature winding

  • Compensation winding

Explanation

Question 3 of 29

1

The value of field resistance that will limit field current to a value insufficient for voltage build up is called_____

Select one of the following:

  • Saturation resistance

  • Critical field resistance

  • Zero output limit

  • Field saturation

Explanation

Question 4 of 29

1

Interpole coils consist of ______

Select one of the following:

  • Small number of turns of large gage wire

  • Small number of turns of small gage wire

  • Large number of turns of large gag wire

  • Large number of turns of small gage wire

Explanation

Question 5 of 29

1

Interpole coils are connected

Select one of the following:

  • Across the armature

  • Across the series field

  • In series with the armature

  • In series with the shunt field

Explanation

Question 6 of 29

1

A 100KW DC generator is operating at full load; it requires 125KW to turn the generator. What is the efficiency of the generator?

Select one of the following:

  • 30%

  • 50%

  • 80%

  • 95%

Explanation

Question 7 of 29

1

The position at which there is no voltage in the armature is

Select one of the following:

  • Equalizer area

  • Excitation

  • Neutral plane

  • Location of the field poles

Explanation

Question 8 of 29

1

Which of the following is not a type of DC generator

Select one of the following:

  • Compound

  • Electro-magnetic

  • Shunt

  • Series

Explanation

Question 9 of 29

1

The winding that provides high voltage and low current is

Select one of the following:

  • Frog-leg

  • Lap wound

  • Wave wound

  • Lap-wave wound

Explanation

Question 10 of 29

1

The winding that provides moderate voltage and current is?

Select one of the following:

  • Frog-leg wound

  • Lap wound

  • Wave wound

  • Lap-wave wound

Explanation

Question 11 of 29

1

The item that ride against the commutator to make electrical connection are

Select one of the following:

  • Field windings

  • Armature windings

  • Brush

  • Pole pieces

Explanation

Question 12 of 29

1

The magnetic field is sometimes provide by electromagnets. This is done by windings that are wound around the

Select one of the following:

  • Brushes

  • Pole piece

  • Armature

  • Case

Explanation

Question 13 of 29

1

A device that converts mechanical input into DC electrical output is a

Select one of the following:

  • Alternator

  • Generator

  • Motor

  • Inverter

Explanation

Question 14 of 29

1

The rotating part of the generator is called the

Select one of the following:

  • Stator

  • Field

  • Armature

  • Exciter

Explanation

Question 15 of 29

1

The components of a DC generator that converts the armature AC and DC is the

Select one of the following:

  • Commutator

  • Alternator

  • Converter

  • Field

Explanation

Question 16 of 29

1

The winding that provides low voltage and high current is

Select one of the following:

  • Frog-leg wound

  • Lap wound

  • Wave wound

  • Lap-wave wound

Explanation

Question 17 of 29

1

In a compound generator, the setting of the setting of the amount of current in the series and shunt field windings determine the

Select one of the following:

  • Complexing

  • Compounding

  • Exciting

  • Differential

Explanation

Question 18 of 29

1

In a generator the series field diverter is also called the

Select one of the following:

  • Series field shunt rheostat

  • Series field series rheostat

  • Series field exciter

  • Shunt field exciter

Explanation

Question 19 of 29

1

Counter-torque is caused by the magnetic attraction between the field poles and the

Select one of the following:

  • Statot

  • Stator winding

  • Interpole

  • Armature

Explanation

Question 20 of 29

1

Armature reaction is the bending of the stator magnetic field by the _____ magnetic field

Select one of the following:

  • Armature

  • Stator

  • Interpoles

  • Stator windings

Explanation

Question 21 of 29

1

Series field windings are connected in series with the armature. They are wound with

Select one of the following:

  • Many turns large wire

  • Many turns small wire

  • Few turns large wire

  • Few turns small wire

Explanation

Question 22 of 29

1

The output of a shunt generator is usually controlled by the amount of

Select one of the following:

  • Field excitation

  • Input voltage

  • Input torque

  • Armature excitation current

Explanation

Question 23 of 29

1

A generator contains both series and shunt windings is called a

Select one of the following:

  • Self-excited generator

  • Separately excited generator

  • Complex generator

  • Compound generator

Explanation

Question 24 of 29

1

A generator is self-exited when

Select one of the following:

  • An outside source of AC is used to produce magnetism in the pole pieces

  • An outside source of DC is used to produce magnetism in the pole pieces

  • An initial voltage is produced by residual magnetism in the pole pieces

  • An initial voltage is produced in the series field to increase voltage

Explanation

Question 25 of 29

1

The CEC states that a generator shall be equipped with an indicating switch or circuit breaker except when

Select one of the following:

  • The generator is compounding

  • The generator is equipped with a governor

  • The drive means can be readily shut down and is not in parallel

  • The generator is arranged in parallel

Explanation

Question 26 of 29

1

When a 2 pole circuit breaker is used to protect a 3 wire DC generator, it must be installed so as to disconnect

Select one of the following:

  • Each armature lead

  • each series field winding lead

  • Each shunt field winding leaf

  • Source power

Explanation

Question 27 of 29

1

At what point in a DC generator system must the ground be attached

Select one of the following:

  • Each armature lead

  • Individual service

  • On interior services

  • One or more supply stations

Explanation

Question 28 of 29

1

When a 4 pole circuit breaker is used to protect a 3-wire DC generator, the breaker must be connected

Select one of the following:

  • In series with the armature

  • In parallel with the armature

  • That it is actuated by the entire armature current

  • In parallel with the shunt field

Explanation

Question 29 of 29

1

When a DC machine is cumulative compound

Select one of the following:

  • The series and shunt field aid each other in the production of magnetism

  • The series and shunt field are connected in series with each other

  • The series and shunt field oppose each other in the production of magnetism

  • The series and shunt field are connected in parallel with each other

Explanation

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