A. water pumps
B. jaw crushers
C. centrifugal blowers
D. none of the above
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Related Mcqs:
- 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...
- _________________method of starting a three phase induction motor needs six terminals ?
- A. Star-delta B. Resistance starting C. Auto-transformer D. None of the above...
- The cost of an induction motor will increase as________________?
- A. horsepower rating increases but r.p.m. decreases B. horsepower rating decreases but r.p.m. increases C. horsepower rating and operating speed increases D. horsepower rating and operating speed decreases...
- ________________ motor is a constant speed motor?
- A. Synchronous motor B. Schrage motor C. Induction motor D. Universal motor...
- In squirrel cage induction motors which of the following methods of starting cannot be used ?
- A. Resistance in rotor circuit B. Resistance in stator circuit C. Auto-transformer starting D. Star-delta starting...
- In ________________ method of staging three phase induction motors the starting voltage is not reduced?
- A. auto-transformer B. star-delta C. slip ring D. any of the above...
- For three-phase induction motors which of the following is the least efficient method of speed control ?
- A. Cascade control B. Pole changing C. Rheostat control D. Combination of cascade and pole changing...
- The practical illustration of the phenomenon of mutual induction is____________?
- A. A.C generator B. D.C dynamo C. induction coil D. transformer...
- 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...
- In series motor which of the following methods can be used for changing the flux per pole ?
- A. Tapped field control B. Diverter field control C. Series-parallel control D. Any of the above...
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