Electrical Engineering Questions And Answers :: Electrical Machine Design: part4



Electrical Engineering : Electrical Machine Design 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.In a D.C. machine, the value of peripheral speed should not, normally, exceed

10 m/s
20 m/s
30 m/s
40 m/s

2.In a D.C. machine the current per brush arm should not be more than

100 A
200 A
300 A
400 A

3.In a D.C. machine the number of brush arms is _____ the number of poles.

less than
equal to
greater than
none of the above

4.In D.C. machines, ir order to prevent excessive distortion of field form by the armature reaction, the field mmf must be made

equal to that of armature mmf
less in comparison with the arma�ture mmf
large in comparison with the arma-ture mmf
none of the above

5.______ brushes are fragile and cause excessive wear of commutator,

Natural graphite
Hard carbon
Electro graphitic
Metal graphite

More Electrical Machine Design QUESTIONS AND ANSWERS available in next pages

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