MMET 301 Final Exam Questions With
Correct Answers
Force - CORRECT ANSWER✔✔-A push or pull exerted on an object
| | | | | | | | | |
Friction - CORRECT ANSWER✔✔-A force that opposes motion
| | | | | | |
Torque - CORRECT ANSWER✔✔-Force * Distance
| | | | |
RPM - CORRECT ANSWER✔✔-revolutions per minute
| | | | |
Power - CORRECT ANSWER✔✔-the rate at which work is done
| | | | | | | | |
Efficiency - CORRECT ANSWER✔✔-= Power out / Power In
| | | | | | | |
Electric motors - CORRECT ANSWER✔✔-current creates
| | | | | |
electromagnetic field |
Types of Electric motors - CORRECT ANSWER✔✔-AC & DC motors
| | | | | | | | |
,AC ( Alternating Current) Motors - CORRECT ANSWER✔✔-- Found in
| | | | | | | | | |
homes |
- Current travels in both directions
| | | | | |
- Low voltage
| |
Single phase AC motor - CORRECT ANSWER✔✔-only one voltage
| | | | | | | | |
waveform is applied to motor | | | |
Three phase AC motors - CORRECT ANSWER✔✔-three wires supply
| | | | | | | | |
voltage to motor | |
Rotor - CORRECT ANSWER✔✔-The rotating member of an electric
| | | | | | | | |
motor
Stator - CORRECT ANSWER✔✔-stationary outer shell of electric motor
| | | | | | | |
Synchronous speed - CORRECT ANSWER✔✔-Rotational speed of stator's
| | | | | | |
magnetic field
| |
Slip - CORRECT ANSWER✔✔-Difference between actual rotor and
| | | | | | | |
Synchronous speed |
,Speed-torque curve - CORRECT ANSWER✔✔-shows torque values | | | | | | |
critical for motor selection| | |
Locked rotor torque - CORRECT ANSWER✔✔-torque at zero speed, used
| | | | | | | | |
for accelerating the load
| | | |
Pull-up torque - CORRECT ANSWER✔✔-minimum torque during
| | | | | | |
acceleration from rest the speed where breakdown occurs | | | | | | |
Breakdown torque - CORRECT ANSWER✔✔-torque produced by motor
| | | | | | | |
just before it stops turning due to heavy load and application
| | | | | | | | | |
shaded pole motor - CORRECT ANSWER✔✔-copper loop surrounds
| | | | | | | |
each stator pole | |
Split -phase motor - CORRECT ANSWER✔✔-two sets of stator windings
| | | | | | | | | |
in the motor
| |
capacitor - start motor - CORRECT ANSWER✔✔-has start and run
| | | | | | | | | |
windings
capacitor - start capacitor - run motor - CORRECT ANSWER✔✔-uses two
| | | | | | | | | |
capacitor to provide magnetic field shift
| | | | | |
, permanent split - capacitor motor - CORRECT ANSWER✔✔-identical
| | | | | | | |
main and auxiliary windings to provide starting torque
| | | | | | |
Frequency - CORRECT ANSWER✔✔-the number of times in once second
| | | | | | | | |
an alternating current voltage switches
| | | | |
USA Hertz - CORRECT ANSWER✔✔-60 Hz
| | | | |
Causes of motor overheating - CORRECT ANSWER✔✔-- changes of
| | | | | | | | |
energy |
- over work
| | |
- improper motor size
| | | |
- incorrect voltage
| | |
- repeated starts
| | |
- poor ventilation
| |
constant - torque load - CORRECT ANSWER✔✔-demand for horsepower
| | | | | | | |
that is in direct proportion to the speed of the load
| | | | | | | | | | |
variable - torque load - CORRECT ANSWER✔✔-
| | | | | |
Correct Answers
Force - CORRECT ANSWER✔✔-A push or pull exerted on an object
| | | | | | | | | |
Friction - CORRECT ANSWER✔✔-A force that opposes motion
| | | | | | |
Torque - CORRECT ANSWER✔✔-Force * Distance
| | | | |
RPM - CORRECT ANSWER✔✔-revolutions per minute
| | | | |
Power - CORRECT ANSWER✔✔-the rate at which work is done
| | | | | | | | |
Efficiency - CORRECT ANSWER✔✔-= Power out / Power In
| | | | | | | |
Electric motors - CORRECT ANSWER✔✔-current creates
| | | | | |
electromagnetic field |
Types of Electric motors - CORRECT ANSWER✔✔-AC & DC motors
| | | | | | | | |
,AC ( Alternating Current) Motors - CORRECT ANSWER✔✔-- Found in
| | | | | | | | | |
homes |
- Current travels in both directions
| | | | | |
- Low voltage
| |
Single phase AC motor - CORRECT ANSWER✔✔-only one voltage
| | | | | | | | |
waveform is applied to motor | | | |
Three phase AC motors - CORRECT ANSWER✔✔-three wires supply
| | | | | | | | |
voltage to motor | |
Rotor - CORRECT ANSWER✔✔-The rotating member of an electric
| | | | | | | | |
motor
Stator - CORRECT ANSWER✔✔-stationary outer shell of electric motor
| | | | | | | |
Synchronous speed - CORRECT ANSWER✔✔-Rotational speed of stator's
| | | | | | |
magnetic field
| |
Slip - CORRECT ANSWER✔✔-Difference between actual rotor and
| | | | | | | |
Synchronous speed |
,Speed-torque curve - CORRECT ANSWER✔✔-shows torque values | | | | | | |
critical for motor selection| | |
Locked rotor torque - CORRECT ANSWER✔✔-torque at zero speed, used
| | | | | | | | |
for accelerating the load
| | | |
Pull-up torque - CORRECT ANSWER✔✔-minimum torque during
| | | | | | |
acceleration from rest the speed where breakdown occurs | | | | | | |
Breakdown torque - CORRECT ANSWER✔✔-torque produced by motor
| | | | | | | |
just before it stops turning due to heavy load and application
| | | | | | | | | |
shaded pole motor - CORRECT ANSWER✔✔-copper loop surrounds
| | | | | | | |
each stator pole | |
Split -phase motor - CORRECT ANSWER✔✔-two sets of stator windings
| | | | | | | | | |
in the motor
| |
capacitor - start motor - CORRECT ANSWER✔✔-has start and run
| | | | | | | | | |
windings
capacitor - start capacitor - run motor - CORRECT ANSWER✔✔-uses two
| | | | | | | | | |
capacitor to provide magnetic field shift
| | | | | |
, permanent split - capacitor motor - CORRECT ANSWER✔✔-identical
| | | | | | | |
main and auxiliary windings to provide starting torque
| | | | | | |
Frequency - CORRECT ANSWER✔✔-the number of times in once second
| | | | | | | | |
an alternating current voltage switches
| | | | |
USA Hertz - CORRECT ANSWER✔✔-60 Hz
| | | | |
Causes of motor overheating - CORRECT ANSWER✔✔-- changes of
| | | | | | | | |
energy |
- over work
| | |
- improper motor size
| | | |
- incorrect voltage
| | |
- repeated starts
| | |
- poor ventilation
| |
constant - torque load - CORRECT ANSWER✔✔-demand for horsepower
| | | | | | | |
that is in direct proportion to the speed of the load
| | | | | | | | | | |
variable - torque load - CORRECT ANSWER✔✔-
| | | | | |
