Electric Drives Three Phase Induction Motors Online Exam Quiz
Electric Drives Three Phase Induction Motors GK Quiz. Question and Answers related to Electric Drives Three Phase Induction Motors. MCQ (Multiple Choice Questions with answers about Electric Drives Three Phase Induction Motors
The slope of the V-I curve is 5°. Calculate the value of resistance. Assume the relationship between voltage and current is a straight line.
Options
A : .3254 ?
B : .3608 ?
C : .3543 ?
D : .3443 ?
A 50 Hz, 4poles, a single phase induction motor is rotating in the clockwise direction at a speed of 1425 rpm. The slip of motor in the direction of rotation & opposite direction of the motor will be respectively.
Options
A : 0.05, 0.95
B : 0.04, 1.96
C : 0.05, 1.95
D : 0.05, 0.02
Calculate the moment of inertia of the thin spherical shell having a mass of 73 kg and diameter of 36 cm.
Options
A : 1.56 kgm2
B : 1.47 kgm2
C : 1.38 kgm2
D : 1.48 kgm2
An 8-pole, 3-phase, 50 Hz induction motor is operating at a speed of 720 rpm. The frequency of the rotor current of the motor in Hz is __________
Options
A : 2
B : 4
C : 3
D : 1
Calculate the active power in a 788 ? resistor with 178 A current flowing through it.
Options
A : 24.96 MW
B : 24.44 MW
C : 24.12 MW
D : 26.18 MW
Calculate the active power in a 487 H inductor.
Options
A : 2482 W
B : 1545 W
C : 4565 W
D : 0 W
A 3-phase induction motor runs at almost 1000 rpm at no load and 950 rpm at full load when supplied with power from a 50 Hz, 3-phase supply. What is the corresponding speed of the rotor field with respect to the rotor?
Options
A : 30 revolution per minute
B : 40 revolution per minute
C : 60 revolution per minute
D : 50 revolution per minute
Calculate the moment of inertia of the disc having a mass of 54 kg and diameter of 91 cm.
Options
A : 5.512 kgm2
B : 5.589 kgm2
C : 5.487 kgm2
D : 5.018 kgm2
The frame of an induction motor is made of _________
Options
A : Aluminum
B : Silicon steel
C : Cast iron
D : Stainless steel
A three-phase slip ring induction motor is fed from the rotor side with the stator winding short-circuited. The frequency of the current flowing in the short-circuited stator is ____________
Options
A : Slip frequency
B : Supply frequency
C : The frequency corresponding to rotor speed
D : Zero
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