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

Correct Answer: it develops hysteresis torque which is extremely steady both in amplitude and phase

Bissoy MCQ
#Electrical Engineering #Single Phase Induction Motors

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 room of 36 people. 20 players play chase while 28 players play poker. How many players play both?
A 45
B 20
C 12
D 28
All Argentine footballers are skillful. All skillful players are good players, All good players enjoy high salary. If the above pieces of information are true, then it can safely be concluded that --
A There is no Argentine footballer who does not enjoy high salary
B Only those who are good players , enjoy high salary
C All who enjoy high salary are Argentine footballers
D All strong players are Argentine footballers
A hysteresis motor works on the principle of
A hysteresis loss
B magnetisation of rotor
C eddy current loss
D electromagnetic induction
In a hysteresis motor, the rotor must have
A retentivity
B resistivity
C susceptibility
D none of the above
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
The rotor of a hysteresis motor is made of
A aluminium
B cast iron
C chrome steel
D copper
Hysteresis is desirable in Schmitt-trigger, because
A Energy is to be stored/discharged in parasitic capacitances.
B Effects of temperature would be compensated.
C Devices in the circuit should be allowed time for saturation and desaturation.
D It would prevent noise from causing false triggering.
'Cox' chart which is useful in the design of a distillation column (particularly suitable for petroleum hydrocarbons) is a plot of the
A Temperature vs. log (vapor pressure)
B Vapor pressure vs. log (temperature)
C Log (temperature) vs. log (vapor pressure)
D Vapor pressure vs. temperature

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