Electrical Machine Design - Study Mode
[#96] Helical windings are used in
Correct Answer
(B) power transformers
[#97] Transformers with a capacity of up to _____ have a cooling radiator system with natural cooling
Correct Answer
(D) 10 MVA
[#98] In a single phase power factor meter the phase difference between the currents in the two pressure coils is
Correct Answer
(C) exactly 90°
[#99] In self cooled motors the cooling time constant is about ______ than the heating time constant because cooling conditions are worse at standstill.
Correct Answer
(A) 2 to 3 times greater
[#100] The power of a n-phase circuit can be measured by using a minimum of
Correct Answer
(A) (n – 1) wattmeter elements