Related Questions

Copper, even though costly, finds use in the windings of electrical machines because
A Copper points offer low contact resistance
B Copper can be easily soldered and welded
C Copper windings are less bulky and the machines become compact
D All of the above
Multilayer helical windings are commonly used in the transformers as high voltage windings
A upto 20 kV
B upto 50 kV
C upto 80 kV
D for 110 kV and above
The insulation between windings and grounded core and the insulation between the windings of the same phase is
A minor insulation
B major insulation
C either of the above
D none of the above
Silicon steel is used in electrical machines because it has
A Low coercivity
B Low retentivity
C Low hysteresis loss
D High coercivity
Braille, the universally accepted 'system' of writing used by blind persons, consists of sixty-three characters
A catalog
B method
C committee
D punctuation
Before adapting to changes in value , many prefer to ___, to ___ the universally agreed on principles that have been upheld for centuries .
A innovate .... protect
B resist ... defend
C ponder .... subvert
D vacillate ..... publicize
Which calendar is being universally followed?
A Christian Era
B Julian Calendar
C Gregorian Calendar
D Saka Era
If 18 identical machines required 40 days to complete a job, how many fewer days would have been required to do the job if 6 additional machines of the same type had been used from the beginning?
A 10
B 13.33
C 16
D 26.66
Laminated cores, in electrical machines, are used to reduce
A Copper loss
B Eddy current loss
C Hysteresis loss
D All of the above
If it takes 4 days for 3 machines to do a certain job, it will take two machines to do the same job in -
A 6 days
B 4 days
C 5 days
D 2 days

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