WorksheetsSINGLE PHASE MOTORS1
Total questions: 12
Worksheet time: 6mins
All of the following single phase induction motors has a centrifugal switch EXCEPT:
A. Capacitor run
B. Capacitor start
C. Capacitor start-run
D. Split phase
The two variables used in calculating synchronous speed are:
A. Voltage and current
B. Current and frequency
C. Frequency and voltage
D. Frequency and number of poles
The construction of the universal motor is similar to the construction of:
A. Shaded pole motor
B. Single phase induction motor
C. Permanent magnet motor
D. DC series motor
Friction losses and Windage losses are:
A. Mechanical Losses
B. Iron Losses
C. Copper Losses
D. All
Hysteresis and eddy current losses are also called:
A. Friction losses
B. Core losses
C. Copper losses
D. Mechanical losses
Which of the following is NOT a single phase motor?
A.Repulsion motor
B. Universal motor
C. Compound motor
D. Split phase motor
Which of the following losses is minimized by using laminated sheets of steel?
A. Mechanical losses
B. Core losses
C. Copper losses
D. Friction and winding losses
. The Synchronous Speed (Ns) of a two-pole motor operating at 50 Hz is:
A. 6000 RPM
B. 1500 RPM
C. 3000 RPM
D. 9000 RPM
What type of motor is shown in the figure?
A. Shunt motor
B. Capacitor run motor
C. Repulsion motor
D.Shaded pole motor
One horsepower is equivalent to:
A. 546 watt
B. 646 watt
C. 746 watt
D.846 watt
The two coils of a single phase induction motor are known as:
A. Main and shunt
B. Shunt and series
C. Shunt and auxiliary
D. Main and auxiliary
Which motor has high torque?
A. Spilt phase motor
B. Capacitor start motor
C. Capacitor run motor
D. Shaded pole motor
