|
A 4-point starter is used to start and control the speed of a ___
|
|
0
|
174
|
August 28, 2021
|
|
A cumulatively compounded dc motor runs at a ___
|
|
0
|
153
|
August 28, 2021
|
|
Direct-on-line (DOL) starters are not suitable for starting large ___
|
|
0
|
120
|
August 28, 2021
|
|
In a dc motor, if armature current is increased, keeping field current constant ___
|
|
0
|
164
|
August 28, 2021
|
|
If an additional resistance is connected in series with a ___
|
|
0
|
134
|
August 28, 2021
|
|
In a dc motor if the brushes are given a backward shift, then ___
|
|
0
|
350
|
August 28, 2021
|
|
For very sensitive and wide speed control, the preferable control method is ___
|
|
0
|
350
|
August 28, 2021
|
|
In an electric motor, the electromagnetic torque developed is ___
|
|
0
|
176
|
August 28, 2021
|
|
If the voltage applied across the armature of a dc motor is reduced by ___
|
|
0
|
151
|
August 28, 2021
|
|
Torque developed by the armature of a dc motor is proportional to which one of the following?
|
|
0
|
168
|
August 28, 2021
|
|
A dc shunt motor is fitted with a field regulator for ___
|
|
0
|
250
|
August 28, 2021
|
|
A dc motor develops the maximum mechanical power when the ___
|
|
0
|
168
|
August 28, 2021
|
|
A motor used for punching machine is usually subjected to ___
|
|
0
|
169
|
August 28, 2021
|
|
In a dc compound motor the field regulator is ___
|
|
0
|
170
|
August 28, 2021
|
|
The dc motor, that has poorest speed regulation, is ___
|
|
0
|
120
|
August 28, 2021
|
|
In a dc motor, energy conversion would not have been possible but for ___
|
|
0
|
185
|
August 28, 2021
|
|
Running the machine at no load is inadvisable for ___
|
|
0
|
238
|
August 28, 2021
|
|
The main factor that leads to unstable parallel operation of flat or ___
|
|
0
|
144
|
August 28, 2021
|
|
A differentially compounded dc motor with interpoles and with brushes on the ___
|
|
0
|
193
|
August 28, 2021
|
|
A dc shunt motor may have rising speed-torque characteristic due to ___
|
|
0
|
165
|
August 28, 2021
|
|
If the field circuit resistance of a dc shunt generator exceeds its ___
|
|
0
|
151
|
August 28, 2021
|
|
A dc series motor must not be started on no load because it would ___
|
|
0
|
133
|
August 28, 2021
|
|
The slight curature at the lower end of the OCC of a self excited dc generator is ___
|
|
0
|
120
|
August 28, 2021
|
|
In comparison to shunt and compound motors, a dc series motor develops ___
|
|
0
|
260
|
August 28, 2021
|
|
The polarity of the interpole is the ___
|
|
0
|
130
|
August 28, 2021
|
|
If N is the speed of a dc series motor and ___
|
|
0
|
175
|
August 28, 2021
|
|
The interpoles in dc machines have a tapering shape in order to ___
|
|
0
|
139
|
August 28, 2021
|
|
A PMDC commutator motor has a no-load speed of 6,000 rpm when connected to ___
|
|
0
|
891
|
August 28, 2021
|
|
Due to magnetic saturation, the flux per pole in a ___
|
|
0
|
144
|
August 28, 2021
|
|
What happens to the speed when the flux is reduced by 10% in a ___
|
|
0
|
212
|
August 28, 2021
|