The load cycle for a motor driving a power press will be________________?

Related Mcqs:

1. A transformer coupled class A power amplifier has a load of 100 O on the secondary. If the turn ratio is 10:1, what is the value of load appearing on the primary?

   A. 5 kO
   B. 20 kO
   C. 100 kO
   D. 10 kO

2. When the load is above _______________ a synchronous motor is found to be more economical?

   A. 2 kW
   B. 20 kW
   C. 50 kW
   D. 100 kW

3. In jaw crushers a motor has to often start against ____________________ load?

   A. heavy
   B. medium
   C. normal
   D. low

4. In which of the following applications the load on motor changes in cyclic order ?

   A. Electric shovels
   B. Cranes
   C. Rolling mills
   D. All of the above

5. ________________ motor is a constant speed motor?

   A. Synchronous motor
   B. Schrage motor
   C. Induction motor
   D. Universal motor

6. A wound rotor induction motor is preferred, as compared to squirrel cage induction motor, when major consideration is____________________?

   A. slop speed operation
   B. high starting torque
   C. low windage losses
   D. all of the above

7. What will be the collector efficiency of a power amplifier having zero signal power dissipation of 5 watts and a.c. power output of 2 watts ?

   A. 20%
   B. 80%
   C. 40%
   D. 50%

8. The maximum a.c. power output from a class A power amplifier is 10 W. What should be the minimum power rating of the transistor used ?

   A. 10 W
   B. 15 W
   C. 5 W
   D. 20 W

9. The output power of a transistor amplifier is more than the input power because the additional power is supplied by__________________?

   A. Transistor
   B. Biasing circuit
   C. Collector supply VCC
   D. None of the above

10. A single stage transistor amplifier with collector load RC and emitter resistance RE has a d.c. load of ________________________?

    A. RC
    B. RC || RE
    C. RC – RE
    D. RC + RE