Question is ⇒ In a single phase motor the centrifugal switch, Options are ⇒ (A) disconnects auxiliary winding of the motor, (B) disconnects main winding of the motor, (C) reconnects the main winding the motor, (D) reconnects the auxiliary winding of the motor, (E) , Leave your comments or Download question paper.

Question is ⇒ In a single phase motor the centrifugal switch, Options are ⇒ (A) disconnects auxiliary winding of the motor, (B) disconnects main winding of the motor, (C) reconnects the main winding the motor, (D) reconnects the auxiliary winding of the motor, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	In a single phase motor the centrifugal switch
A.	disconnects auxiliary winding of the motor [Correct Answer]
B.	disconnects main winding of the motor [Wrong Answer]
C.	reconnects the main winding the motor [Wrong Answer]
D.	reconnects the auxiliary winding of the motor [Wrong Answer]
View Answer 11 -7 Explanation:- Answer : A Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

Previous question Next question

Also Read Similar Questions Below :

⇒ If a D.C. series motor is operated on A.C. supply, it will
spark excessively
have poor efficiency
have poor power factor
all of the above

⇒ If a single-phase motor runs hot the probable cause cannot be
blown fuses
low voltage
high voltage
shorted stator coils

⇒ Which of the following statements regarding hysteresis motor is in incorrect ?
It is extremely sensitive to fluctuations in supply voltage
Its high starting torque is due Lo its high rotor hysteresis loss
It is extremely quiet in operation
It accelerates from rest to full-speed almost instantaneously

⇒ In a repulsion motor, brushes are connected
to starting winding
to the external supply
to stator winding
together by a jumper wire

⇒ When a universal motor is operated on no-load, its speed is limited by
supply voltage frequency
armature reaction
windage and friction
weight of the armature

⇒ Two-value capacitor motor finds increased application as compressor motor in small home air-conditioners because
it is comparatively cheaper
it has almost non-destructible capacitor
it has lovv starting as well as running currents at relatively high power factor
it is quiet in operation

⇒ Centrifiigal switch disconnects the auxiliary winding of the motor at about ____percent of synchronous s'peed
30 to 40
70 to 80
80 to 90
100

⇒ The purpose of stator winding in the compensated repulsion motor is to
provide mechanical balance
improve power factor and provide better speed regulation
prevent hunting in the motor
eliminate armature reaction

⇒ Which of the following motors is generally used in toys ?
Reluctance motor
Hysteresis motor
Shaded-pole motor
Two-value capacitor motor

⇒ The direction of rotation of an SHADED POLE motor is determined by
interchanging the supply leads
position of shaded pole with respect to main pole
retentivity of the rotor material
none of these

⇒ In a shaded pole motor, the shading coil usually consist of
a single turn of heavy wire which is in parallel with running winding
a single turn of heavy copper wire which is short-circuited and carries only induced current
a multilayer fine gauge copper wire in parallel with running winding
none of the above

⇒ Short-circuiter is used in
repulsion induction motor
repulsion motor
repulsion start induction run motor
none of the above

⇒ In a hysteresis motor, the rotor must have
retentivity
resistivity
susceptibility
none of the above

⇒ A repulsion motor is equipped with
slip rings
commutator
both (a) and (b)
none of the above

⇒ Which motor is relatively free from mechanical and magnetic vibrations ?
Shaded-pole motor
Universal motor
Reluctance motor
Hysteresis motor

⇒ Which of the following single-phase induction motors is generally used in time phonographs ?
Resistance start
Capacitor start capacitor run
Shaded pole
Universal

⇒ In capacitor start single-phase motors
current in the starting winding leads the voltage
current in the starting winding lags the voltage
current in the starting winding is in phase with voltage in running winding
none of the above

⇒ Which of the following motors is generally used for electric shavers ?
Universal motor
Shaded-pole motor
Reluctance motor
Hysteresis motor

⇒ Which of the following motors is preferred for tape-recorders ?
Shaded pole motor
Hysteresis motor
Two value capacitor motor
Universal motor

⇒ What could be the size of a universal motor for use in vacuum cleaners ?
2 H.P.
1 H.P.
3/4 H.P.
1/4 H.P.

⇒ The speed with which magnetic field of an induction motor rotates is called
shaft speed
effective speed
synchronous speed
slip speed

⇒ The repulsion-start induction-run motor is used because of
good power factor
high efficiency
minimum cost
high starting torque

⇒ If the capacitor of a single-phase motor is short-circuited
the motor will not start
the motor will run
the motor will run in reverse direction
the motor will run in the same direction at reduced r.p.m.

⇒ The power factor of a single-phase induction motor is usually
lagging
always leading
unity
unity to 0:8 leading

⇒ Shading coils, in case of a shaded pole motor, are used to
protect against sparking
reduce windage losses
reduce friction losses
produce rotating magnetic field.

⇒ The range of efficiency for shaded pole motors is
95% to 99%
80% to 90%
50% to 75%
5% to 35%

⇒ Whic,h statement about resistancestart split-phase motor is incorrect ?
It is non-reversible
The main winding has low resistance but high reactance
It has two stator windings called main and starting windings
Starting winding has high resistance but low reactance

⇒ A single-phase capacitor-start motor will take starting current nearly
four to six times the full load current
three times the full load current
twice the full load current
same as full load current

⇒ Which of the following motors is used for unity power factor ?
Hysteresis motor
Schrage motor
Universal motor
Reluctance motor

⇒ The motor used on small lathes is usually
universal motor
D.C. shunt motor
single-phase capacitor run motor
3-phase synchronous motor