|
Which motor should be used for centrifugal pumps?
|
|
0
|
144
|
September 24, 2021
|
|
In Field's test for series motors one motor drives the other machine as ___
|
|
0
|
168
|
September 24, 2021
|
|
Which of the following motors, on removal of load, will run at the highest speed?
|
|
0
|
149
|
September 24, 2021
|
|
While starting a differential compound motor, it is best to short the series field in ___
|
|
0
|
178
|
September 24, 2021
|
|
What is the effect produced by the electric current in an electric motor?
|
|
0
|
256
|
September 24, 2021
|
|
The speed of a series motor at ___
|
|
0
|
131
|
September 24, 2021
|
|
A 230 V D.C. shunt motor takes 32 A at ___
|
|
0
|
251
|
September 24, 2021
|
|
D.C. generators are normally designed for maximum efficiency around
|
|
0
|
168
|
September 24, 2021
|
|
D.C. shunt motors are used for ___
|
|
0
|
136
|
September 24, 2021
|
|
Which of the following methods of braking is used in rolling mills?
|
|
0
|
215
|
September 24, 2021
|
|
Which of the following can be used to control the speed of a D.C. motor?
|
|
0
|
206
|
September 24, 2021
|
|
Which of the following motors is most suitable for signalling devices and many kinds of timers?
|
|
0
|
160
|
September 24, 2021
|
|
The plugging gives the ___
|
|
0
|
162
|
September 24, 2021
|
|
As there is no back e.m.f. at the instant of starting, a D.C. motor, in order to ___
|
|
0
|
113
|
September 24, 2021
|
|
Which of the following motor has the poorest speed regulation?
|
|
0
|
198
|
September 24, 2021
|
|
In D.C. machines the residual magnetism is ___
|
|
0
|
147
|
September 24, 2021
|
|
Which of the following motor is preferred for operation in highly explosive atmosphere?
|
|
0
|
170
|
September 24, 2021
|
|
The power mentioned on the name plate of ___
|
|
0
|
177
|
September 24, 2021
|
|
A shearing machine has cyclic load consisting of ___
|
|
0
|
297
|
September 24, 2021
|
|
In a D.C. shunt motor, under the conditions of ___
|
|
0
|
163
|
September 24, 2021
|
|
If a D.C. motor is connected across the A.C. supply it ___
|
|
0
|
218
|
September 24, 2021
|
|
Differentially compound D.C. motors can ___
|
|
0
|
131
|
September 24, 2021
|
|
Which of the following, in a D.C. motor, can sustain the maximum temperature rise?
|
|
0
|
262
|
September 24, 2021
|
|
The main disadvantage of Hopkinson's test for finding efficiency of ___
|
|
0
|
177
|
September 24, 2021
|
|
Regenerative braking on D.C. shunt motors is ___
|
|
0
|
152
|
September 24, 2021
|
|
In which of the following tests only one motor is required?
|
|
0
|
159
|
September 24, 2021
|
|
A D.C. series motor, as compared to shunt and compound motors, has ___
|
|
0
|
157
|
September 24, 2021
|
|
Which of the following motor has high starting torque?
|
|
0
|
148
|
September 24, 2021
|
|
In electric motors carbon brushes are ___
|
|
0
|
130
|
September 24, 2021
|
|
Which of the following D.C. motors has the least drop in speed between no-load and nominal load?
|
|
0
|
148
|
September 24, 2021
|