SINGLE PHASE MOTORS1

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