Electrical Engineering Questions And Answers :: Dc Motors: part4



Electrical Engineering : Dc Motors QUESTIONS AND ANSWERS :: part4 : 1 to 5

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

1.The armature voltage control of D.C. motor provides

constant voltage drive
constant current drive
constant torque drive
none of the above

2.Which of the following loss in a D.C. generator varies significantly with the load current ?

Field copper loss
Windage loss
Armature copper loss
None of the above

3.Which of the following motors is most suitable for signalling devices and many kinds of timers ?

D.C. shunt motor
D.C. series motor
Induction motor
Reluctance motor

4.If the speed of a D.C. shunt motor is increased, the back e.m.f. of the motor will

increase
decrease
remain same
become zero

5.If a D.C. motor designed for 40�C ambient temperature is to be used for 50�C ambient temperature, then the motor

of lower H.P. should be selected
of higher H.P. should be selected
can be used for 50�C ambient temperature also
is to be derated by a factor recom-mended by manufacturer and select the next higher H.P. motor

More Dc Motors QUESTIONS AND ANSWERS available in next pages

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