Electrical Engineering Questions And Answers :: Dc Motors: part4



Electrical Engineering : Dc Motors QUESTIONS AND ANSWERS :: part4 : 21 to 25

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

21.In a manual shunt motor starter

over load relay is connected in series and no volt relay in parallel with the load
over load relay is connected in paral´┐Żlel and no volt relay in series with the load
over load relay and no volt relay are both connected in series with the load
over load relay and no volt relay are both connected in parallel with the load

22.Why are the D.C. motors preferred for traction applications ?

Torque and speed are inversely proportional to armature current
Torque is proportional to armature current
Torque is proportional to square root of armature current
The speed is inversely proportional to the torque and the torque is proportional to square of armature current

23.The plugging gives the

zero torque braking
smallest torque braking
highest torque braking
none of the above

24.Which of the following losses are significantly reduced by laminating the core of a D.C. generator ?

Hysteresis losses
Eddy current losses
Copper losses
Windage losses

More Dc Motors QUESTIONS AND ANSWERS available in next pages

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