Electrical Machine Design - Study Mode

[#106] In D.C. machines the width of the duct is usually
Correct Answer

(D) 10 mm

[#107] The efficiency of a machine should be as ______ as possible to reduce the operating cost.
Correct Answer

(A) high

[#108] Which of the following methods is used for air cooling of turbo-alternators ?
Correct Answer

(D) All of the above

[#109] In a Weston frequency meter, the magnetic axes of the two fixed coils are
Correct Answer

(B) Perpendicular

[#110] A practical formula for determining the thickness of insulation between low voltage and high voltage windings is
Correct Answer

(D) 5 + 0.9 kV mm