att test 10
att test 10 Questions and Answers
Question 1
This schematic represents what type of rotating machine?
Correct Answer
Separately excited DC generator
Question 2
How is a pulsating DC output eliminated in DC generators?
Correct Answer
Using a multiple-loop armature
Question 3
What part of a motor allows reversing the magnetic poles in the rotor?
Correct Answer
Commutator and brushes
Question 4
What principle of magnetism allows a generator to power its own stator windings and
still generate an output voltage?
Correct Answer
Retentivity
Question 5
In a generator, when the armature rotation is parallel to the stator magnetic field,
what is the output voltage?
Correct Answer
zero
Page 1 of 38
, att test 10
Question 6
In the motor's voltage source circuit, what is the purpose of IC1?
Correct Answer
Voltage regulator
Question 7
In the motor's voltage source circuit, what is the purpose of R8?
Correct Answer
Manual speed control
Question 8
In the automatic speed control circuit, what happens to the frequency output of ISO1
if the load on M2 increases?
Correct Answer
decrease
Question 9
In the automatic speed control circuit, what happens to the output of U2 if the load
on M2 decreases?
Correct Answer
increase
Question 10
During troubleshooting of a motor-generator set, if the set is not rotating, what is the
probable faulted area?
Correct Answer
Motor and motor circuits
Page 2 of 38
, att test 10
Question 11
What principle of magnetism allows the use of electromagnet stators?
Correct Answer
Passing a current through a conductor produces a magnet
Question 12
This schematic represents what type of rotating machine?
Correct Answer
Series DC motor
Question 13
What principle of magnetism do motors operate on?
Correct Answer
Attraction and repulsion
Question 14
In the motor's voltage source circuit, what is the purpose of U1?
Correct Answer
Difference amplifier
Question 15
In a motor, it is important to know that the starting current _______
Correct Answer
is higher than the running current.
Question 16
What principle of magnetism do generators operate on?
Correct Answer
Passing a conductor through a magnetic field produces voltage
Page 3 of 38
, att test 10
Question 17
How do you troubleshoot an automatic speed control circuit in a motor-generator
set?
Correct Answer
Signal tracing circuits
Question 18
What is the primary difference between a DC motor and DC generator?
Correct Answer
The power source to the rotor is replaced in a generator with a load.
Question 19
In U1, if the non-inverting input voltage remains constant and the inverting input
voltage increases, what happens to the output voltage?
Correct Answer
Decreases
Question 20
What principle of magnetism allows the use of electromagnet stators?
Correct Answer
Passing a current through a conductor produces a magnet
Question 21
What level of voltage is produced in an AC generator when the armature movement
is parallel to the stator field?
Correct Answer
None
Page 4 of 38
att test 10 Questions and Answers
Question 1
This schematic represents what type of rotating machine?
Correct Answer
Separately excited DC generator
Question 2
How is a pulsating DC output eliminated in DC generators?
Correct Answer
Using a multiple-loop armature
Question 3
What part of a motor allows reversing the magnetic poles in the rotor?
Correct Answer
Commutator and brushes
Question 4
What principle of magnetism allows a generator to power its own stator windings and
still generate an output voltage?
Correct Answer
Retentivity
Question 5
In a generator, when the armature rotation is parallel to the stator magnetic field,
what is the output voltage?
Correct Answer
zero
Page 1 of 38
, att test 10
Question 6
In the motor's voltage source circuit, what is the purpose of IC1?
Correct Answer
Voltage regulator
Question 7
In the motor's voltage source circuit, what is the purpose of R8?
Correct Answer
Manual speed control
Question 8
In the automatic speed control circuit, what happens to the frequency output of ISO1
if the load on M2 increases?
Correct Answer
decrease
Question 9
In the automatic speed control circuit, what happens to the output of U2 if the load
on M2 decreases?
Correct Answer
increase
Question 10
During troubleshooting of a motor-generator set, if the set is not rotating, what is the
probable faulted area?
Correct Answer
Motor and motor circuits
Page 2 of 38
, att test 10
Question 11
What principle of magnetism allows the use of electromagnet stators?
Correct Answer
Passing a current through a conductor produces a magnet
Question 12
This schematic represents what type of rotating machine?
Correct Answer
Series DC motor
Question 13
What principle of magnetism do motors operate on?
Correct Answer
Attraction and repulsion
Question 14
In the motor's voltage source circuit, what is the purpose of U1?
Correct Answer
Difference amplifier
Question 15
In a motor, it is important to know that the starting current _______
Correct Answer
is higher than the running current.
Question 16
What principle of magnetism do generators operate on?
Correct Answer
Passing a conductor through a magnetic field produces voltage
Page 3 of 38
, att test 10
Question 17
How do you troubleshoot an automatic speed control circuit in a motor-generator
set?
Correct Answer
Signal tracing circuits
Question 18
What is the primary difference between a DC motor and DC generator?
Correct Answer
The power source to the rotor is replaced in a generator with a load.
Question 19
In U1, if the non-inverting input voltage remains constant and the inverting input
voltage increases, what happens to the output voltage?
Correct Answer
Decreases
Question 20
What principle of magnetism allows the use of electromagnet stators?
Correct Answer
Passing a current through a conductor produces a magnet
Question 21
What level of voltage is produced in an AC generator when the armature movement
is parallel to the stator field?
Correct Answer
None
Page 4 of 38
