ATT Test 10 Questions and Correct
Answers
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
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
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.
The principle of _______ is used for all motors and generators - Answer-magnetism
In a Wye connected alternator, the line voltage is equal to _______ - Answer-phase voltage x 1.73
In balanced Wye loads, all the resistors are _______ - Answer-equal
A single-phase alternator physically resembles a _______ - Answer-single-phase AC motor
Answers
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
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
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.
The principle of _______ is used for all motors and generators - Answer-magnetism
In a Wye connected alternator, the line voltage is equal to _______ - Answer-phase voltage x 1.73
In balanced Wye loads, all the resistors are _______ - Answer-equal
A single-phase alternator physically resembles a _______ - Answer-single-phase AC motor
