In a universal motor, the most common cause of brush sparking is

In a split phase motor

A. the starting winding is connected through a centrifugal switch

B. the running winding is connected through a centrifugal switch

C. both starting and running windings are connected through a centrifugal switch

D. centrifugal switch is used to control supply voltage

In a ceilingfan employing capacitor run motor

A. secondary winding surrounds the primary winding

B. primary winding surrounds the secondary winding

C. both are usual arrangements

D. none of the above

Which type of load is offered by cranes and hoists ?

A. Gradually varying load

B. Non-reversing, no-load start

C. Reversing, light start

D. Reversing, heavy start

Which of the following motors is preferred for tape-recorders?

A. Shaded pole motor

B. Hysteresis motor

C. Two value capacitor motor

D. Universal motor