|
In D.C. motor which of the following can sustain the maximum temperature rise?
|
|
0
|
250
|
September 24, 2021
|
|
These days D.C. motors are widely used in ___
|
|
0
|
218
|
September 24, 2021
|
|
When two D.C. series motors are connected in ___
|
|
0
|
324
|
September 24, 2021
|
|
According to Fleming's left hand rule, when the forefinger points in ___
|
|
0
|
221
|
September 24, 2021
|
|
The direction of rotation of a D.C. series motor can be ___
|
|
0
|
239
|
September 24, 2021
|
|
Speed control by the variation of flux, in a ___
|
|
0
|
243
|
September 24, 2021
|
|
The generated e.m.f. and the current are in the opposite direction in case of ___
|
|
0
|
515
|
September 24, 2021
|
|
Which of the following methods is most effective in finding out the no load losses in a large D.C. shunt motor?
|
|
0
|
349
|
September 24, 2021
|
|
A motor for punching machine is ___
|
|
0
|
201
|
September 24, 2021
|
|
The mechanical power developed by a D.C. motor is ___
|
|
0
|
391
|
September 24, 2021
|
|
In a D.C. motor constant torque is ___
|
|
0
|
326
|
September 24, 2021
|
|
In a motor, energy conversion would not have been possible but ___
|
|
0
|
207
|
September 24, 2021
|
|
In a D.C. motor if the back e.m.f. is ___
|
|
0
|
210
|
September 24, 2021
|
|
In the D.C. motor the iron losses occur in ___
|
|
0
|
209
|
September 24, 2021
|
|
In variable speed motor ___
|
|
0
|
236
|
September 24, 2021
|
|
In a D.C. generator, the iron losses mainly take place in ___
|
|
0
|
199
|
September 24, 2021
|
|
In a manual shunt motor starter ___
|
|
0
|
212
|
September 24, 2021
|
|
The losses occurring in a D.C. generator are ___
|
|
0
|
174
|
September 24, 2021
|
|
Which motor should not be started on no-load?
|
|
0
|
240
|
September 24, 2021
|
|
The armature voltage control of D.C. motor provides ___
|
|
0
|
335
|
September 24, 2021
|
|
The speed of a D.C. shunt motor can be ___
|
|
0
|
181
|
September 24, 2021
|
|
Buses, trains, trolleys, hoists, cranes require high starting torque and ___
|
|
0
|
322
|
September 24, 2021
|
|
If the supply voltage for a D.C. motor is increased, which of the following will decrease?
|
|
0
|
274
|
September 24, 2021
|
|
In Ward Leonard method of speed control of a D.C. motor, change in ___
|
|
0
|
246
|
September 24, 2021
|
|
The ratio of starting torque to fullload torque is ___
|
|
0
|
173
|
September 24, 2021
|
|
Which D.C. motor Will have least percentage increase of ___
|
|
0
|
240
|
September 24, 2021
|
|
To get the speed of D.C. motor below the normal without wastage of ___
|
|
0
|
198
|
September 24, 2021
|
|
Which D.C. motor is preferred for elevators?
|
|
0
|
297
|
September 24, 2021
|
|
Speed ,control by varying the armature circuit resistance, in a ___
|
|
0
|
285
|
September 24, 2021
|
|
Which losses can be determined by performing the retardation test?
|
|
0
|
179
|
September 24, 2021
|