Related Questions

If the area of hysteresis loop of a material is large, the hysteresis loss in this material will be
A Zero
B Small
C Large
D None of the above
In a hysteresis motor, the rotor must have
A retentivity
B resistivity
C susceptibility
D none of the above
A hysteresis motor works on the principle of
A hysteresis loss
B magnetisation of rotor
C eddy current loss
D electromagnetic induction
The direction of rotation of an hysteresis motor is determined by
A interchanging the supply leads
B position of shaded pole with respect to main pole
C retentivity of the rotor material
D none of these
Which of the following statements regarding hysteresis motor is in incorrect ?
A It is extremely sensitive to fluctuations in supply voltage
B Its high starting torque is due to its high rotor hysteresis loss
C It is extremely quiet in operation
D It accelerates from rest to full-speed almost instantaneously
Hysteresis motor is particularly useful for high-quality record players and tape-recorders because
A it revolves synchronously
B it is not subject to any magnetic or mechanical vibrations
C it can be easily manufactured in extremely small sizes of up to 1 W output
D it develops hysteresis torque which is extremely steady both in amplitude and phase
A wound rotor induction motor is preferred, as compared to squirrel cage induction motor, when major consideration is
A Slop speed operation
B High starting torque
C Low windage losses
D All of the above
When the stator windings are connected in such a fashion that the number of poles are made half, the speed of the rotor of a synchronous motor
A remains same as the original value
B decreases to half the original value
C tends to becomes zero
D increases to two times the original value
Of the 120 households in an area, 55 have cars, 35 have motor bikes, and 20 have both cars and motor bikes. How many of the households in the area have neither cares nor motor bikes?
A 110
B 90
C 50
D 30
A motor pool has 300 vehicles of which 30% are trucks. 20% of all the vehicles in the motor pool are diesel, including 15 trucks. What percent of the motor pool is composed of vehicles that are neither trucks nor diesel?
A 165%
B 90%
C 65%
D 10%

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