1|Page
ATT TEST 10 LATEST UPDATE 2025 200+ QUESTIONS AND
100% CORRECT ANSWERS (VERIFIED ANSWERS) |GRADED
A+
In the motor's voltage source circuit, what is the purpose of IC1? - ANSWER:
Voltage regulator
In the motor's voltage source circuit, what is the purpose of R8? - ANSWER:
Manual speed control
In the automatic speed control circuit, what happens to the frequency output of
ISO1 if the load on M2 increases? - ANSWER: decrease
In the automatic speed control circuit, what happens to the output of U2 if the load
on M2 decreases? - ANSWER: increase
During troubleshooting of a motor-generator set, if the set is not rotating, what is
the probable faulted area? - ANSWER: Motor and motor circuits
What principle of magnetism allows the use of electromagnet stators? - ANSWER:
Passing a current through a conductor produces a magnet
This schematic represents what type of rotating machine? - ANSWER: Series DC
motor
This schematic represents what type of rotating machine? - ANSWER: Separately
excited DC generator
How is a pulsating DC output eliminated in DC generators? - ANSWER: Using a
multiple-loop armature
What part of a motor allows reversing the magnetic poles in the rotor? -
ANSWER: Commutator and brushes
What principle of magnetism allows a generator to power its own stator windings
and still generate an output voltage? - ANSWER: Retentivity
In a generator, when the armature rotation is parallel to the stator magnetic field,
what is the output voltage? - ANSWER: zero
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What principle of magnetism do motors operate on? - ANSWER: Attraction and
repulsion
In the motor's voltage source circuit, what is the purpose of U1? - ANSWER:
Difference amplifier
In a motor, it is important to know that the starting current _______ - ANSWER:
is higher than the running current.
What principle of magnetism do generators operate on? - ANSWER: Passing a
conductor through a magnetic field produces voltage
How do you troubleshoot an automatic speed control circuit in a motor-generator
set? - ANSWER: Signal tracing circuits
What is the primary difference between a DC motor and DC generator? -
ANSWER: The power source to the rotor is replaced in a generator with a load.
In U1, if the non-inverting input voltage remains constant and the inverting input
voltage increases, what happens to the output voltage? - ANSWER: Decreases
What principle of magnetism allows the use of electromagnet stators? - ANSWER:
Passing a current through a conductor produces a magnet
What level of voltage is produced in an AC generator when the armature
movement is parallel to the stator field? - ANSWER: None
In the revolving-field generator, there are no sliding contacts in the _______ -
ANSWER: AC output circuit.
In a Delta connected alternator, the line voltage equals the _______ - ANSWER:
phase voltage
In three-phase alternators, the windings are connected in either a Wye or _______
configuration. - ANSWER: Delta
An AC generator is also known as a/an _______ - ANSWER: alternator.
ATT TEST 10 LATEST UPDATE 2025 200+ QUESTIONS AND
100% CORRECT ANSWERS (VERIFIED ANSWERS) |GRADED
A+
In the motor's voltage source circuit, what is the purpose of IC1? - ANSWER:
Voltage regulator
In the motor's voltage source circuit, what is the purpose of R8? - ANSWER:
Manual speed control
In the automatic speed control circuit, what happens to the frequency output of
ISO1 if the load on M2 increases? - ANSWER: decrease
In the automatic speed control circuit, what happens to the output of U2 if the load
on M2 decreases? - ANSWER: increase
During troubleshooting of a motor-generator set, if the set is not rotating, what is
the probable faulted area? - ANSWER: Motor and motor circuits
What principle of magnetism allows the use of electromagnet stators? - ANSWER:
Passing a current through a conductor produces a magnet
This schematic represents what type of rotating machine? - ANSWER: Series DC
motor
This schematic represents what type of rotating machine? - ANSWER: Separately
excited DC generator
How is a pulsating DC output eliminated in DC generators? - ANSWER: Using a
multiple-loop armature
What part of a motor allows reversing the magnetic poles in the rotor? -
ANSWER: Commutator and brushes
What principle of magnetism allows a generator to power its own stator windings
and still generate an output voltage? - ANSWER: Retentivity
In a generator, when the armature rotation is parallel to the stator magnetic field,
what is the output voltage? - ANSWER: zero
, 2|Page
What principle of magnetism do motors operate on? - ANSWER: Attraction and
repulsion
In the motor's voltage source circuit, what is the purpose of U1? - ANSWER:
Difference amplifier
In a motor, it is important to know that the starting current _______ - ANSWER:
is higher than the running current.
What principle of magnetism do generators operate on? - ANSWER: Passing a
conductor through a magnetic field produces voltage
How do you troubleshoot an automatic speed control circuit in a motor-generator
set? - ANSWER: Signal tracing circuits
What is the primary difference between a DC motor and DC generator? -
ANSWER: The power source to the rotor is replaced in a generator with a load.
In U1, if the non-inverting input voltage remains constant and the inverting input
voltage increases, what happens to the output voltage? - ANSWER: Decreases
What principle of magnetism allows the use of electromagnet stators? - ANSWER:
Passing a current through a conductor produces a magnet
What level of voltage is produced in an AC generator when the armature
movement is parallel to the stator field? - ANSWER: None
In the revolving-field generator, there are no sliding contacts in the _______ -
ANSWER: AC output circuit.
In a Delta connected alternator, the line voltage equals the _______ - ANSWER:
phase voltage
In three-phase alternators, the windings are connected in either a Wye or _______
configuration. - ANSWER: Delta
An AC generator is also known as a/an _______ - ANSWER: alternator.
