1. Rotor of a motor is usually supported on _________ bearings. A. Ball or roller B. Needle C. Bush D. Thrust Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
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 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
3. For derris and winches which of the following drives can be used? A. Pole changing squirrel cage motors B. D.C. motors with Ward-Leonard control C. A.C. slip ring motors with variable resistance D. Any of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
4. Which of the following motors is preferred for traction work? A. Universal motor B. D.C. series motor C. Synchronous motor D. Three-phase induction motor Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
5. Belted slip ring induction motor is almost invariably used for A. Water pumps B. Jaw crushers C. Centrifugal blowers D. None of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
6. Which feature, while selecting a motor for centrifugal pump, will be of least significance? A. Starting characteristics B. Operating speed C. Horse power D. Speed control Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
7. While selecting an electric motor for a floor mill, which electrical characteristics will be of least significance? A. Running characteristics B. Starting characteristics C. Efficiency D. Braking Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
8. Which of the following motors is preferred when quick speed reversal is the main consideration? A. Squirrel cage induction motor B. Wound rotor induction motor C. Synchronous motor D. D.C. motor Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
9. 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 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
10. ________ need frequent starting and stopping of electric motors, A. Paper mills B. Grinding mills C. Air-conditioners D. Lifts and hoists Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
