Related Questions

Equation of time which is the difference between apparent solar time and mean solar time at any instant, vanishes during one year
A Once
B Twice
C Thrice
D Four times
In case of a shell and tube heat exchanger, the effect of L/D on inside film heat transfer co-efficient (hi) vanishes after a Reynold number of
A 1000
B 3000
C 5000
D 10000
In case the back e.m.f. and the speed of a D.C. motor are doubled, the torque developed by the motor will
A Remain unchanged
B Reduce to one-fourth value
C Increase four folds
D Be doubled
If the speed of a D.C. shunt motor is increased, the back e.m.f. of the motor will
A Increase
B Decrease
C Remain same
D Become zero
Of the 120 households in an area, 55 have cars, 35 have motor bikes, and 20 have both cars and motor bikes. How many of the households in the area have neither cares nor motor bikes?
A 110
B 90
C 50
D 30
A motor pool has 300 vehicles of which 30% are trucks. 20% of all the vehicles in the motor pool are diesel, including 15 trucks. What percent of the motor pool is composed of vehicles that are neither trucks nor diesel?
A 165%
B 90%
C 65%
D 10%
By looking at which part of the motor, it can be easily confirmed that a particular motor is D.C. motor?
A Frame
B Shaft
C Commutator
D Stator
One D.C. motor drives another D.C. motor. The second D.C. motor when excited and driven
A Runs as a generator
B Does not run as a generator
C Also runs as a motor comes to stop after sometime
D None of these
Flywheel is used with D.C. compound motor to reduce the peak demand by the motor, compound motor will have to be
A Level compounded
B Under compounded
C Cumulatively compounded
D Differentially compounded
A synchronous motor installed at the receiving end substation operates with such an excitation that it takes power at lagging power factor. Now if the applied voltage of the synchronous motor goes down, the power factor of the synchronous motor will
A remain same
B go down
C improve
D none of the above

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