12268315
Descrição
Quiz por Kaitlyn Hickey, atualizado more than 1 year ago
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Criado por Kaitlyn Hickey
aproximadamente 6 anos atrás
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Questão 1
Questão
Suitable brush pressure for DC generators is usually between_____
Responda
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1 & 2 psi
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2&3 psi
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3&4 psi
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4&5 psi
Questão 2
Questão
In the case of a generator, the voltage regulation is determined by the resistance of the _______
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Field winding
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Shunt winding
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Armature winding
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Compensation winding
Questão 3
Questão
The value of field resistance that will limit field current to a value insufficient for voltage build up is called_____
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Saturation resistance
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Critical field resistance
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Zero output limit
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Field saturation
Questão 4
Questão
Interpole coils consist of ______
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Small number of turns of large gage wire
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Small number of turns of small gage wire
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Large number of turns of large gag wire
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Large number of turns of small gage wire
Questão 5
Questão
Interpole coils are connected
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Across the armature
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Across the series field
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In series with the armature
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In series with the shunt field
Questão 6
Questão
A 100KW DC generator is operating at full load; it requires 125KW to turn the generator. What is the efficiency of the generator?
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30%
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50%
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80%
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95%
Questão 7
Questão
The position at which there is no voltage in the armature is
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Equalizer area
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Excitation
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Neutral plane
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Location of the field poles
Questão 8
Questão
Which of the following is not a type of DC generator
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Compound
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Electro-magnetic
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Shunt
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Series
Questão 9
Questão
The winding that provides high voltage and low current is
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Frog-leg
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Lap wound
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Wave wound
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Lap-wave wound
Questão 10
Questão
The winding that provides moderate voltage and current is?
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Frog-leg wound
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Lap wound
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Wave wound
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Lap-wave wound
Questão 11
Questão
The item that ride against the commutator to make electrical connection are
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Field windings
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Armature windings
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Brush
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Pole pieces
Questão 12
Questão
The magnetic field is sometimes provide by electromagnets. This is done by windings that are wound around the
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Brushes
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Pole piece
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Armature
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Case
Questão 13
Questão
A device that converts mechanical input into DC electrical output is a
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Alternator
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Generator
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Motor
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Inverter
Questão 14
Questão
The rotating part of the generator is called the
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Stator
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Field
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Armature
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Exciter
Questão 15
Questão
The components of a DC generator that converts the armature AC and DC is the
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Commutator
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Alternator
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Converter
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Field
Questão 16
Questão
The winding that provides low voltage and high current is
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Frog-leg wound
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Lap wound
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Wave wound
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Lap-wave wound
Questão 17
Questão
In a compound generator, the setting of the setting of the amount of current in the series and shunt field windings determine the
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Complexing
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Compounding
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Exciting
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Differential
Questão 18
Questão
In a generator the series field diverter is also called the
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Series field shunt rheostat
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Series field series rheostat
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Series field exciter
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Shunt field exciter
Questão 19
Questão
Counter-torque is caused by the magnetic attraction between the field poles and the
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Statot
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Stator winding
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Interpole
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Armature
Questão 20
Questão
Armature reaction is the bending of the stator magnetic field by the _____ magnetic field
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Armature
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Stator
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Interpoles
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Stator windings
Questão 21
Questão
Series field windings are connected in series with the armature. They are wound with
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Many turns large wire
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Many turns small wire
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Few turns large wire
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Few turns small wire
Questão 22
Questão
The output of a shunt generator is usually controlled by the amount of
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Field excitation
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Input voltage
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Input torque
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Armature excitation current
Questão 23
Questão
A generator contains both series and shunt windings is called a
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Self-excited generator
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Separately excited generator
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Complex generator
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Compound generator
Questão 24
Questão
A generator is self-exited when
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An outside source of AC is used to produce magnetism in the pole pieces
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An outside source of DC is used to produce magnetism in the pole pieces
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An initial voltage is produced by residual magnetism in the pole pieces
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An initial voltage is produced in the series field to increase voltage
Questão 25
Questão
The CEC states that a generator shall be equipped with an indicating switch or circuit breaker except when
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The generator is compounding
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The generator is equipped with a governor
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The drive means can be readily shut down and is not in parallel
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The generator is arranged in parallel
Questão 26
Questão
When a 2 pole circuit breaker is used to protect a 3 wire DC generator, it must be installed so as to disconnect
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Each armature lead
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each series field winding lead
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Each shunt field winding leaf
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Source power
Questão 27
Questão
At what point in a DC generator system must the ground be attached
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Each armature lead
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Individual service
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On interior services
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One or more supply stations
Questão 28
Questão
When a 4 pole circuit breaker is used to protect a 3-wire DC generator, the breaker must be connected
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In series with the armature
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In parallel with the armature
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That it is actuated by the entire armature current
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In parallel with the shunt field
Questão 29
Questão
When a DC machine is cumulative compound
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The series and shunt field aid each other in the production of magnetism
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The series and shunt field are connected in series with each other
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The series and shunt field oppose each other in the production of magnetism
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The series and shunt field are connected in parallel with each other
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