19 + Mcqs in Machine Ratings Page 1 McqOptions

Explore topic-wise MCQs in Electrical Machines.

In the lab, two students X and Y conducted the experiments to verify the name plate ratings of the transformer.But student X conducted the same at higher frequency. The kVA reading of student X will be ___________

Auto transformer rating is chosen so as to have best performance when the analogous two winding transformer has ___________

A 200V, 10 hp, 4 poles, 60 Hz, Y-connected induction motor had full load slip of 5%. Then the rotor speed of the motor with respect to stator is?

For a separately excited dc machine of 25 kW, 250 V and armature resistance of 0.25 ohms, is running at 3000 rpm with supply of 255 V. The electromagnetic power produced at the armature in kilo watts is?

A 3-phase, five limbed shell type transformer, star connected, 200V, 50 Hz, 100 kVA will have ___________

While conducting lab experiments on DC machine loading, the students are given a machine with its rating as 100 kW maximum rating. Then the _____________

The desired voltage regulation for a single phase, 50 Hz transformer is zero. Its pu ohmic drop is 4% and pu reactive drop is 4%. The required power factor angle for the operation in degrees is?

If the dimension of a single phase transformer is made sqrt(3) times less than the original structure, then what is new no load current rating of the transformer?

Refer the diagram; a single-phase supply of 100V, 50Hz is fed to the step-up transformer having primary impedance of 1 ohms and secondary impedance 20 ohms. What is the power consumed by the load of 5 ohms?

A_200V,_10_HP,_4_POLES,_60_HZ,_Y-CONNECTED_INDUCTION_MOTOR_HAD_FULL_LOAD_SLIP_OF_5%._THEN_THE_ROTOR_SPEED_OF_THE_MOTOR_WITH_RESPECT_TO_STATOR_IS?$

In the lab, two students X and Y conducted the experiments to verify the name plate ratings of the transformer.But student X conducted the same at higher frequency. The kVA reading of student X will be$

Auto_transformer_rating_is_chosen_so_as_to_have_best_performance,_when_the_analogous_two_winding_transformer_has$

If two alternators A and B are operated in parallel having per unit synchronous reactance as 0.02 ohms and 0.05 ohms respectively.Then what the ratio of contributing loading of machine A to B?

For a separately excited dc machine of 25 kW, 250 V and armature resistance of 0.25 ohms, is running at 3000 rpm with supply of 255 V.

A 3-phase, five limbed shell type transformer, star connected, 200V, 50 Hz, 100 kVA will have

While conducting lab experiments on DC machine loading, the students are given a machine with its rating as 100 kW maximum rating. Then

The desired voltage regulation for a single phase, 50 Hz transformer is zero. Its pu ohmic drop is 4% and pu reactive drop is 4%. The required power factor angle for the operation in degrees

For a single phase, 50 Hz transformer, if the open circuit test is conducted at 40 Hz. What is the variation in the no-load power factor of the transformer?

If the dimension of a single phase transformer is made sqrt(3) times less than the original structure,then what is new no load current rating of the transformer?