ATT Week 12 Exam ACTUAL
QUESTIONS AND CORRECT ANSWERS
Rigidity is determined by what three factors? - CORRECT ANSWER Rotor shape, rotor
weight, and rotor speed.
Any machine that has a spinning or rotating shaft and uses electricity as the input or output is
______________. - CORRECT ANSWER Rotating Machinery
What are the two categories of rotating machinery? - CORRECT ANSWER Motor and
generator.
A __________ uses an electrical input and converts it to a rotating mechanical output. - CORRECT
ANSWER motor
A __________ uses a rotating mechanical input and convert it to an electrical output. - CORRECT
ANSWER generator
What is the term for voltage produced in a motor that opposes the applied voltage? - CORRECT
ANSWER CMEF
What type incremental motor uses digital pulses? - CORRECT ANSWER Stepper
What type of incremental motor uses specific magnitudes of voltage? - CORRECT
ANSWER Analog
__________ is best described as a twisting action. - CORRECT ANSWER Torque
Torque is the highest in a __________ condition. - CORRECT ANSWER locked
Horsepower is the power rate corresponding to the rate of conversion of ___________ per min or
___________ per sec - CORRECT ANSWER 33,000 ft-Ib; 550 ft-Ib/sec
, What is another metric (not Ft-lb) used to measure torque? - CORRECT ANSWER Newton
meter
RPM and CEMF are _____________ to each other, and ____________________ to torque and load. -
CORRECT ANSWER proportional; inversely proportional
If RPM increases, what happens to generator output voltage? - CORRECT ANSWER Increases.
In a motor, if applied voltage decreases, what happens to RPM? - CORRECT
ANSWER Decreases.
Motors operate on the principles of magnetism that have to do with ____________________. -
CORRECT ANSWER attraction and repulsion
DC generators operate on the principle of magnetism that has to do with
_________________________ to produce voltage. - CORRECT ANSWER passing a conductor
through a magnetic field
What type of power do generators produce? - CORRECT ANSWER AC or DC
If power in = power out, how efficient is said motor/generator? - CORRECT ANSWER 100%
How is efficiency calculated? - CORRECT ANSWER Pout/Pin x 100
What's the conversion formula for ft/lbs to watts? - CORRECT ANSWER W = ft/lbs x 1.356
What is the principle of magnetism that allows a generator to power its own stator windings and still
generate an output voltage? - CORRECT ANSWER Retentivity
Motor speed and CEMF are __________ proportional. - CORRECT ANSWER directly
QUESTIONS AND CORRECT ANSWERS
Rigidity is determined by what three factors? - CORRECT ANSWER Rotor shape, rotor
weight, and rotor speed.
Any machine that has a spinning or rotating shaft and uses electricity as the input or output is
______________. - CORRECT ANSWER Rotating Machinery
What are the two categories of rotating machinery? - CORRECT ANSWER Motor and
generator.
A __________ uses an electrical input and converts it to a rotating mechanical output. - CORRECT
ANSWER motor
A __________ uses a rotating mechanical input and convert it to an electrical output. - CORRECT
ANSWER generator
What is the term for voltage produced in a motor that opposes the applied voltage? - CORRECT
ANSWER CMEF
What type incremental motor uses digital pulses? - CORRECT ANSWER Stepper
What type of incremental motor uses specific magnitudes of voltage? - CORRECT
ANSWER Analog
__________ is best described as a twisting action. - CORRECT ANSWER Torque
Torque is the highest in a __________ condition. - CORRECT ANSWER locked
Horsepower is the power rate corresponding to the rate of conversion of ___________ per min or
___________ per sec - CORRECT ANSWER 33,000 ft-Ib; 550 ft-Ib/sec
, What is another metric (not Ft-lb) used to measure torque? - CORRECT ANSWER Newton
meter
RPM and CEMF are _____________ to each other, and ____________________ to torque and load. -
CORRECT ANSWER proportional; inversely proportional
If RPM increases, what happens to generator output voltage? - CORRECT ANSWER Increases.
In a motor, if applied voltage decreases, what happens to RPM? - CORRECT
ANSWER Decreases.
Motors operate on the principles of magnetism that have to do with ____________________. -
CORRECT ANSWER attraction and repulsion
DC generators operate on the principle of magnetism that has to do with
_________________________ to produce voltage. - CORRECT ANSWER passing a conductor
through a magnetic field
What type of power do generators produce? - CORRECT ANSWER AC or DC
If power in = power out, how efficient is said motor/generator? - CORRECT ANSWER 100%
How is efficiency calculated? - CORRECT ANSWER Pout/Pin x 100
What's the conversion formula for ft/lbs to watts? - CORRECT ANSWER W = ft/lbs x 1.356
What is the principle of magnetism that allows a generator to power its own stator windings and still
generate an output voltage? - CORRECT ANSWER Retentivity
Motor speed and CEMF are __________ proportional. - CORRECT ANSWER directly
