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1) __________________ has relatively wider range of speed control? a. Synchronous motor b. Ship ring induction motor c. Squirrel cage induction motor d. D.C. shunt motor
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2) Rotor of a motor is usually supported on ___________________ bearings? a. ball or roller b. needle c. bush d. thrust
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3) The size of an excavator is usually expressed in terms of_________________? a. ‘crowd’ motion b. angle of swing c. cubic metres d. travel in metres
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4) _________________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
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5) Which of the following is essentially needed while selecting a motor ? a. Pulley b. Starter c. Foundation pedal d. Bearings
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6) In a paper mill where constant speed is required________________? a. synchronous motors are preferred b. A.C. motors are preferred c. individual drive is preferred d. group drive is preferred
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7) For blowers which of the following motor is preferred ? a. D.C. series motor b. D.C. shunt motor c. Squirrel cage induction motor d. Wound rotor induction motor
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8) Reluctance motor is a________________? a. variable torque motor b. low torque variable speed motor c. self starting type synchronous motor d. low noise, slow speed motor
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9) A reluctance motor_________________? a. is provided with slip rings b. requires starting gear c. has high cost d. is compact
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10) ___________________is preferred for synthetic fibre mills? a. Synchronous motor b. Reluctance motor c. Series motor d. Shunt motor
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