A. fans
B. blowers
C. sound equipment
D. mixer grinders
Related Mcqs:
- Which motor is normally free from mechanical and magnetic vibrations ?
A. Split phase motor
B. Universal motor
C. Hysteresis motor
D. Shaded pole motor - Which of the following single-phase motors is suitable for timing and control purposes ?
A. Reluctance motor
B. Series motor
C. Repulsion motor
D. Universal motor - 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 - A hysteresis motor works on the principle of__________?
A. hysteresis loss
B. magnetisation of rotor
C. eddy current loss
D. electromagnetic induction - 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 - In a hysteresis motor, the rotor must have____________?
A. retentivity
B. resistivity
C. susceptibility
D. none of the above - The rotor of a hysteresis motor is made of___________?
A. aluminium
B. cast iron
C. chrome steel
D. copper - The shaded pole motor is used for__________?
A. high starting torque
B. low starting torque
C. medium starting torque
D. very high starting torque - Which of the following motors is used in tape-recorders ____________?
A. Hysteresis motor
B. Reluctance motor
C. Capacitor-run motor
D. Universal motor
