Computer Programming MCQs

5739 MCQs  (Page 51 of 574)

In a DC motor the inter-pole winding is connected in________________?
A. series with field winding
B. series speed armature winding
C. parallel big field winding
D. parallel with armature winding
Armature reaction in dc motor results___________?
A. decrease in speed
B. increase in speed
C. short circuit
D. open circuit
Which of the following test can be performed on DC series motor?
A. swinburne test
B. hopkinson test
C. brake test
D. field test
Ward Leonard method of speed control is basically a______________?
A. field control method
B. armature controlled method
C. field diverter
D. frequency control method
Kingdom Protoctista includes_______________?
A. Prokaryotic organisms
B. Unicellular organisms
C. Fungi
D. Eu-cariotiquic organisms
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
In a four-pole D.C. machine____________?
A. All the four poles are north poles
B. Alternate poles are north and south
C. All the four poles are south poles
D. Two north poles follow two south poles
In lap winding, the number of brushes is always_____________?
A. Double the number of poles
B. Same as the number of poles
C. Half the number of poles
D. Two
The bearings used to support the rotor shafts are generally______________?
A. Ball bearings
B. Bush bearings
C. Magnetic bearmgs
D. Needle bearings