Ele
Q no 1 . In …………. Machines , the size of the shaft is decided by the crictical speed which depends on the deflection of the shaft .
a ) small
b ) medium
c ) large
d ) any of the above
explanation
answer c ) large
Q no 2 . The length of air gap to be provided in …………is primarily determined by power factor consideration .
a ) d.c series motor
b ) d.c shunt motor
c ) induction motor
d ) synchronous motor
explanation
answer c ) induction motor
Q no 3 . commercial available medium size machines have a speed range of ……
a ) 200 to 400 r.p.m
b ) 600 to 1000 r.p.m
c ) 1000 to 1500 r.p.m
d ) 2000 to 2500 r.p.m
explanation
answer d ) 2000 to 2500 r.p.m
Q no 4 . The action of electromagnetic machines can be related to which of the following basic principles ?
a ) Induction
b ) Interaction
c ) alignment
d ) all of the above
explanation
answer d ) all of the above
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