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

Related Mcqs:

1. For which of the following applications motor has to start with high acceleration ?

   A. Oil expeller B. Floor mill C. Lifts and hoists D. Centrifugal pump...

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

   A. variable load B. continuous C. continuous but periodical D. intermittent and variable load...

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. 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...

8. In a single stage transistor amplifier, RC and RL represent collector resistance and load resistance respectively. The transistor sees a d.c. load of _____________________?

   A. RC + RL B. RC || RL C. RL D. RC...

9. If RC and RL represent the collector resistance and load resistance respectively in a single stage transistor amplifier, then a.c. load is____________________?

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

10. The d.c. load of a transistor amplifier is generally_______________ that of a a.c. load?

    A. The same as B. Less than C. More than D. None of the above...