# Electrical Engineering Questions And Answers :: Dc Motors: part2

Electrical Engineering : Dc Motors QUESTIONS AND ANSWERS :: part2 : 11 to 15

Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :

 11.The starting resistance of a D.C. motor is generally low around 500 Q 1000 Q infinitely large ANSWER : : low Explanation :
 12.Which D.C. motor will be suitable alongwith flywheel for intermittent light and heavy loads? Series motor Shunt motor Cumulatively compounded motor Differentially compounded motor ANSWER : : Cumulatively compounded motor Explanation :
 13.In a D.C. series motor, if the armature current is reduced by 50%, the torque of the motor will be equal to 100% of the previous value 50% of the previous value 25% of the previous value 10% of the previous value ANSWER : : 25% of the previous value Explanation :
 14.If a D.C. shunt motor is working at no load and if shunt field circuit suddenly opens nothing will happen to th� motor this will make armature to take heavy current, possibly burning it this will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses (d) motor will run at very slow speed this will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses (d) motor will run at very slow speed ANSWER : D.C. series motors are used Explanation :
 15.In case-the conditions for maximum power for a D.C. motor are established, the efficiency of the motor will be 100% around 90% anywhere between 75% and 90% less than 50% ANSWER : : less than 50% Explanation :

More Dc Motors QUESTIONS AND ANSWERS available in next pages

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