Related Questions

A company paid tk.500000 in merit raises to employees whose performances were rated A, B, or C. Each employee rated A received twice the amount of the rated C.each employee rated B received 150% of the amount of the raise thst was paid to each employee rated C. if 50 workers were rated A,100rated B and 150 were rated C, how much was the raise paid to each employee rated B?
A Tk. 740
B Tk. 1250
C Tk. 1875
D Tk. 2500
A separately excited generator as compared to a self-excited generator
A Is amenable to better voltage control
B Is more stable
C Has exciting current independent of load current
D Has all above features
When load on an over-excited or under excited synchronous motor is increased, rate of change of its armature current as compared with that of power factor is
A more
B less
C equal
D twice
The losses occurring in a D.C. generator are given below. Which loss is likely to have highest proportion at rated load of the generator?
A Hysteresis loss
B Field copper loss
C Armature copper loss
D Eddy current loss
Two pipes A and B together can fill a cistern in 4 hours. Had they been opened separately, then B would have taken 6 hours more than A to fill the cistern. How much time will be taken by A to fill the cistern separately?
A 1 hour
B 2 hours
C 6 hours
D 8 hours
The demagnetizing component of armature reaction in a D.C. generator
A Reduces generator e.m.f.
B Increases armature speed
C Reduces interpoles flux density
D Results in sparking trouble
Armature reaction in a generator results in
A Demagnetization of leading pole tip and magnetization of trailing pole tip
B Demagnetization of trailing pole tip and magnetization of leading pole tip
C Demagnetizing the center of all poles
D Magnetizing the center of all poles
As a result of armature reaction, the reduction in the total mutual air gap flux in a D.C. generator is approximately
A 40 percent
B 25 percent
C 10 percent
D 5 percent
If a self excited D.C. generator after being installed, fails to build up on its first trial run, the first thing to do is to
A reverse the field connections
B increase the field resistance
C increase the speed of primemover
D check armature insulation resistance
The series field of a short-shunt D.C. generator is excited by
A external current
B armature current
C shunt current
D load current

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