Computer Programming MCQs

A. High inductance arid low resistance
B. Low inductance and high resistance
C. Low inductance and low resistance
D. High inductance and high resistance

A. Sr2x2 = 1
B. Sr2 = x2
C. R2 = sx2
D. R2 = s2x2

A. Supply frequency
B. Supply voltage
C. Copper losses in motor
D. None of the above

A. Rotor leakage reactance
B. Stator reactance
C. The reactive lagging magnetizing current necessary to generate the magnetic flux
D. All of the above

A. It is run on load
B. It is run in reverse direction
C. It is run on voltage higher than the rated voltage
D. E.m.f. is injected in the rotor circuit

A. Graphite
B. Grease
C. Mineral oil
D. Molasses

A. Reduces starting torque as well as maximum torque
B. Increases starting torque as well as maximum torque
C. Increases starting torque but maxi-mum torque remains unchanged
D. Increases starting torque but maxi-mum torque decreases

A. Decreases the rotor current
B. Increases the rotor current
C. Rotor current becomes zero
D. Rotor current rernains same

A. Slip ring type
B. Squirrel cage type
C. Any of the above
D. None of the above

A. Resistance rise method
B. Thermometer method
C. Embedded temperature method
D. All above methods