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Level 2 Module 2 Motors: Theory and
Application. Exam Questions And Answers
100% Pass.
Any exposed live parts must be guarded if they are operating at ___. - Answer✔50V or more
between terminals
Which of the following are most likely to use dynamic braking ___? - Answer✔Forklifts
In a DC series motor, how much of its full-load torque is developed at starting? - Answer✔500%
For a given number of poles, which of the following determines the speed of an AC motor? -
Answer✔Frequency
Which of the following motors is used where the required starting torque is high and speed
control is desirable ? - Answer✔Compound
The synchronous speed at which a four pole,60Hz induction motor operates is ____. -
Answer✔1,800 rpm
Slip is best defined as ____. - Answer✔The difference between the synchronous speed and the
speed of the rotor in an induction motor
Which of the following motors operate on the principle of the rotating magnetic field? -
Answer✔Induction motors
Horsepower is used to rate the ___. - Answer✔Output capacity of a motor
How many motor designs does NEMA designate? - Answer✔5
In a split-phase motor, how much greater is the starting current when compared to the full-load
current? - Answer✔6 to 8 times
The capacitor-start motor is the single-phase motor type that has the ___. - Answer✔Highest
starting torque
The wound rotor induction motor is used ___. - Answer✔For speed control and to limit starting
current
Which of the following is true of the shaded-pole motors? - Answer✔They have a low starting
torque, a low efficiency, and a high noice level.
1|Page
Level 2 Module 2 Motors: Theory and
Application. Exam Questions And Answers
100% Pass.
Any exposed live parts must be guarded if they are operating at ___. - Answer✔50V or more
between terminals
Which of the following are most likely to use dynamic braking ___? - Answer✔Forklifts
In a DC series motor, how much of its full-load torque is developed at starting? - Answer✔500%
For a given number of poles, which of the following determines the speed of an AC motor? -
Answer✔Frequency
Which of the following motors is used where the required starting torque is high and speed
control is desirable ? - Answer✔Compound
The synchronous speed at which a four pole,60Hz induction motor operates is ____. -
Answer✔1,800 rpm
Slip is best defined as ____. - Answer✔The difference between the synchronous speed and the
speed of the rotor in an induction motor
Which of the following motors operate on the principle of the rotating magnetic field? -
Answer✔Induction motors
Horsepower is used to rate the ___. - Answer✔Output capacity of a motor
How many motor designs does NEMA designate? - Answer✔5
In a split-phase motor, how much greater is the starting current when compared to the full-load
current? - Answer✔6 to 8 times
The capacitor-start motor is the single-phase motor type that has the ___. - Answer✔Highest
starting torque
The wound rotor induction motor is used ___. - Answer✔For speed control and to limit starting
current
Which of the following is true of the shaded-pole motors? - Answer✔They have a low starting
torque, a low efficiency, and a high noice level.
1|Page
