Att EXAM REAL EXAM QUESTIONS AND
CORRECT DETAILIED ANSWERS
(VERIFIED ANSWERS) 2025 NEW
UPDATE
This schematic represents what type of rotating machine? - Answers - ✔✔Separately
excited DC generator
How is a pulsating DC output eliminated in DC generators? - Answers - ✔✔Using a
multiple-loop armature
What part of a motor allows reversing the magnetic poles in the rotor? - Answers -
✔✔Commutator and brushes
What principle of magnetism allows a generator to power its own stator windings and
still generate an output voltage? - Answers - ✔✔Retentivity
In a generator, when the armature rotation is parallel to the stator magnetic field, what is
the output voltage? - Answers - ✔✔zero
In the motor's voltage source circuit, what is the purpose of IC1? - Answers -
✔✔Voltage regulator
In the motor's voltage source circuit, what is the purpose of R8? - Answers -
✔✔Manual speed control
In the automatic speed control circuit, what happens to the frequency output of ISO1 if
the load on M2 increases? - Answers - ✔✔decrease
In the automatic speed control circuit, what happens to the output of U2 if the load on
M2 decreases? - Answers - ✔✔increase
During troubleshooting of a motor-generator set, if the set is not rotating, what is the
probable faulted area? - Answers - ✔✔Motor and motor circuits
What principle of magnetism allows the use of electromagnet stators? - Answers -
✔✔Passing a current through a conductor produces a magnet
This schematic represents what type of rotating machine? - Answers - ✔✔Series DC
motor
, What principle of magnetism do motors operate on? - Answers - ✔✔Attraction and
repulsion
In the motor's voltage source circuit, what is the purpose of U1? - Answers -
✔✔Difference amplifier
In a motor, it is important to know that the starting current _______ - Answers - ✔✔is
higher than the running current.
What principle of magnetism do generators operate on? - Answers - ✔✔Passing a
conductor through a magnetic field produces voltage
How do you troubleshoot an automatic speed control circuit in a motor-generator set? -
Answers - ✔✔Signal tracing circuits
What is the primary difference between a DC motor and DC generator? - Answers -
✔✔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? - Answers - ✔✔Decreases
What principle of magnetism allows the use of electromagnet stators? - Answers -
✔✔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? - Answers - ✔✔None
In the revolving-field generator, there are no sliding contacts in the _______ - Answers -
✔✔AC output circuit.
In a Delta connected alternator, the line voltage equals the _______ - Answers -
✔✔phase voltage
In three-phase alternators, the windings are connected in either a Wye or _______
configuration. - Answers - ✔✔Delta
An AC generator is also known as a/an _______ - Answers - ✔✔alternator.
The principle of _______ is used for all motors and generators - Answers -
✔✔magnetism
In a Wye connected alternator, the line voltage is equal to _______ - Answers -
✔✔phase voltage x 1.73
CORRECT DETAILIED ANSWERS
(VERIFIED ANSWERS) 2025 NEW
UPDATE
This schematic represents what type of rotating machine? - Answers - ✔✔Separately
excited DC generator
How is a pulsating DC output eliminated in DC generators? - Answers - ✔✔Using a
multiple-loop armature
What part of a motor allows reversing the magnetic poles in the rotor? - Answers -
✔✔Commutator and brushes
What principle of magnetism allows a generator to power its own stator windings and
still generate an output voltage? - Answers - ✔✔Retentivity
In a generator, when the armature rotation is parallel to the stator magnetic field, what is
the output voltage? - Answers - ✔✔zero
In the motor's voltage source circuit, what is the purpose of IC1? - Answers -
✔✔Voltage regulator
In the motor's voltage source circuit, what is the purpose of R8? - Answers -
✔✔Manual speed control
In the automatic speed control circuit, what happens to the frequency output of ISO1 if
the load on M2 increases? - Answers - ✔✔decrease
In the automatic speed control circuit, what happens to the output of U2 if the load on
M2 decreases? - Answers - ✔✔increase
During troubleshooting of a motor-generator set, if the set is not rotating, what is the
probable faulted area? - Answers - ✔✔Motor and motor circuits
What principle of magnetism allows the use of electromagnet stators? - Answers -
✔✔Passing a current through a conductor produces a magnet
This schematic represents what type of rotating machine? - Answers - ✔✔Series DC
motor
, What principle of magnetism do motors operate on? - Answers - ✔✔Attraction and
repulsion
In the motor's voltage source circuit, what is the purpose of U1? - Answers -
✔✔Difference amplifier
In a motor, it is important to know that the starting current _______ - Answers - ✔✔is
higher than the running current.
What principle of magnetism do generators operate on? - Answers - ✔✔Passing a
conductor through a magnetic field produces voltage
How do you troubleshoot an automatic speed control circuit in a motor-generator set? -
Answers - ✔✔Signal tracing circuits
What is the primary difference between a DC motor and DC generator? - Answers -
✔✔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? - Answers - ✔✔Decreases
What principle of magnetism allows the use of electromagnet stators? - Answers -
✔✔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? - Answers - ✔✔None
In the revolving-field generator, there are no sliding contacts in the _______ - Answers -
✔✔AC output circuit.
In a Delta connected alternator, the line voltage equals the _______ - Answers -
✔✔phase voltage
In three-phase alternators, the windings are connected in either a Wye or _______
configuration. - Answers - ✔✔Delta
An AC generator is also known as a/an _______ - Answers - ✔✔alternator.
The principle of _______ is used for all motors and generators - Answers -
✔✔magnetism
In a Wye connected alternator, the line voltage is equal to _______ - Answers -
✔✔phase voltage x 1.73
