Ans- Regenerative braking
2. The slip s for reversal of an induction motor is
Ans- s1= 2-S
3.staring current of a motar is kept low to
Ans- avoid excessive heating
4. Advantage of PWN inverter over square wave inverted is
Ans- 10w order harmonics are eliminated
5. Motors commenly used for drive in printer is a
Ans- stepper motar
6. Zone of electric drive below base speed is
Ans- constant torque region
7. The term 'slip power recovery' is associated with
Ans- 3 phase cage rotar induction motar and 3 phase slip ring induction motor
8. A typical active load is
Ans- Hoist
9. Frequency of voltage generator by alternator having 4 poles and rotating at 1800 rpm is
Ans - N= (120 f / P)
f = (N× p) =(1800×4)/120
= 60Hz
10.________ drive is also called as line shaft drive
Ans - Group drive
