Electri Motors

Chapter 3.2: Electric Motors Part–I: Objective type questions and answers | |The synchronized speed of a motor with 6 poles and operating at 50 Hz frequency is ___. | | |a) 1500 b) 1000 c) 3000 d) 750 | | |The efficiency figures for verve efficient motors (in comparison with standard efficiency motor) can be generally higher by____%.| | | | | |a) 1% b) 3-7% c) 10% and above d) 8-10% | | |The part consumption, in case of centrifugal loads (like pump, fan, blower etc.), symmetrical to ____. | | |a) speed b) square of speed c) cube of speed d) not applicable | | |Which types of following motors are most efficient? | | |a) TEFC b) SPDP c) twain d) None | | |What determines the thermal loading on the motor? | | |a) relations/Load cycle b) Temperature of the winding ! | | |c) Age of the motor d) close conditions | | |Unbalance in voltages at motor terminals is caused by ____. | | |a) fork over single phase loads disproportionately b) Use of different...If you evil to get a full essay, order it on our website: BestEssayCheap.com

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