A. zoom
B. hum
C. ringing
D. buzz
Related Mcqs:
- Noise level test in a transformer is a______________?
A. special test
B. routine test
C. type test
D. none of the above - The noise resulting from vibrations of laminations set by magnetic forces, is termed as_________________?
A. magnetostrication
B. boo
C. hum
D. zoom - Which of the following is the main advantage of an auto-transformer over a two winding transformer?
A. Hysteresis losses are reduced
B. Saving in winding material
C. Copper losses are negligible
D. Eddy losses are totally eliminated - The changes in volume of transformer cooling oil due to variation of atmospheric temperature during day and night is taken care of by which part of transformer?
A. Conservator
B. Breather
C. Bushings
D. Buchholz relay - The degree of mechanical vibrations produced by the laminations of a transformer depends on____________?
A. tightness of clamping
B. gauge of laminations
C. size of laminations
D. all of the above - In a transformer the energy is conveyed from primary to secondary_________?
A. through cooling coil
B. through air
C. by the flux
D. none of the above - While conducting short-circuit test on a transformer the following side is short circuited?
A. High voltage side
B. Low voltage side
C. Primary side
D. Secondary side - The use of higher flux density in the transformer design____________?
A. reduces weight per kVA
B. reduces iron losses
C. reduces copper losses
D. increases part load efficiency - Which of the following does not change in an ordinary transformer ?
A. Frequency
B. Voltage
C. Current
D. Any of the above - Which type of winding is used in 3 phase shell-type transformer?
A. Circular type
B. Sandwich type
C. Cylindrical type
D. Rectangular type
