ATT Test
ATT TEST 10 ACTUAL EXAM COMPLETE QUESTIONS
AND CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) ALREADY GRADED A+2025
This schematic represents what type of rotating machine? -Correct Answer ✔Separately
excited DC generator
How is a pulsating DC output eliminated in DC generators? -Correct Answer ✔Using a
multiple-loop armature
What part of a motor allows reversing the magnetic poles in the rotor? -Correct Answer
✔Commutator and brushes
What principle of magnetism allows a generator to power its own stator windings and
still generate an output voltage? -Correct Answer ✔Retentivity
In a generator, when the armature rotation is parallel to the stator magnetic field, what is
the output voltage? -Correct Answer ✔zero
In the motor's voltage source circuit, what is the purpose of IC1? -Correct Answer
✔Voltage regulator
In the motor's voltage source circuit, what is the purpose of R8? -Correct Answer
✔Manual speed control
In the automatic speed control circuit, what happens to the frequency output of ISO1 if
the load on M2 increases? -Correct Answer ✔decrease
In the automatic speed control circuit, what happens to the output of U2 if the load on
M2 decreases? -Correct Answer ✔increase
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
What principle of magnetism allows the use of electromagnet stators? -Correct Answer
✔Passing a current through a conductor produces a magnet
This schematic represents what type of rotating machine? -Correct Answer ✔Series DC
motor
1|Page
, ATT Test
What principle of magnetism do motors operate on? -Correct Answer ✔Attraction and
repulsion
In the motor's voltage source circuit, what is the purpose of U1? -Correct Answer
✔Difference amplifier
In a motor, it is important to know that the starting current _______ -Correct Answer ✔is
higher than the running current.
What principle of magnetism do generators operate on? -Correct Answer ✔Passing a
conductor through a magnetic field produces voltage
How do you troubleshoot an automatic speed control circuit in a motor-generator set? -
Correct Answer ✔Signal tracing circuits
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.
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
What principle of magnetism allows the use of electromagnet stators? -Correct 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? -Correct Answer ✔None
In the revolving-field generator, there are no sliding contacts in the _______ -Correct
Answer ✔AC output circuit.
In a Delta connected alternator, the line voltage equals the _______ -Correct Answer
✔phase voltage
In three-phase alternators, the windings are connected in either a Wye or _______
configuration. -Correct Answer ✔Delta
An AC generator is also known as a/an _______ -Correct Answer ✔alternator.
The principle of _______ is used for all motors and generators -Correct Answer
✔magnetism
In a Wye connected alternator, the line voltage is equal to _______ -Correct Answer
✔phase voltage x 1.73
2|Page
ATT TEST 10 ACTUAL EXAM COMPLETE QUESTIONS
AND CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) ALREADY GRADED A+2025
This schematic represents what type of rotating machine? -Correct Answer ✔Separately
excited DC generator
How is a pulsating DC output eliminated in DC generators? -Correct Answer ✔Using a
multiple-loop armature
What part of a motor allows reversing the magnetic poles in the rotor? -Correct Answer
✔Commutator and brushes
What principle of magnetism allows a generator to power its own stator windings and
still generate an output voltage? -Correct Answer ✔Retentivity
In a generator, when the armature rotation is parallel to the stator magnetic field, what is
the output voltage? -Correct Answer ✔zero
In the motor's voltage source circuit, what is the purpose of IC1? -Correct Answer
✔Voltage regulator
In the motor's voltage source circuit, what is the purpose of R8? -Correct Answer
✔Manual speed control
In the automatic speed control circuit, what happens to the frequency output of ISO1 if
the load on M2 increases? -Correct Answer ✔decrease
In the automatic speed control circuit, what happens to the output of U2 if the load on
M2 decreases? -Correct Answer ✔increase
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
What principle of magnetism allows the use of electromagnet stators? -Correct Answer
✔Passing a current through a conductor produces a magnet
This schematic represents what type of rotating machine? -Correct Answer ✔Series DC
motor
1|Page
, ATT Test
What principle of magnetism do motors operate on? -Correct Answer ✔Attraction and
repulsion
In the motor's voltage source circuit, what is the purpose of U1? -Correct Answer
✔Difference amplifier
In a motor, it is important to know that the starting current _______ -Correct Answer ✔is
higher than the running current.
What principle of magnetism do generators operate on? -Correct Answer ✔Passing a
conductor through a magnetic field produces voltage
How do you troubleshoot an automatic speed control circuit in a motor-generator set? -
Correct Answer ✔Signal tracing circuits
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.
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
What principle of magnetism allows the use of electromagnet stators? -Correct 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? -Correct Answer ✔None
In the revolving-field generator, there are no sliding contacts in the _______ -Correct
Answer ✔AC output circuit.
In a Delta connected alternator, the line voltage equals the _______ -Correct Answer
✔phase voltage
In three-phase alternators, the windings are connected in either a Wye or _______
configuration. -Correct Answer ✔Delta
An AC generator is also known as a/an _______ -Correct Answer ✔alternator.
The principle of _______ is used for all motors and generators -Correct Answer
✔magnetism
In a Wye connected alternator, the line voltage is equal to _______ -Correct Answer
✔phase voltage x 1.73
2|Page
