In a shaded pole motor, the shading coil usually consist of
In a shaded pole motor, the shading coil usually consist of
Most of the fractional horsepower motors have either
Most of the fractional horsepower motors have either
The running winding of a single phase motor on testing with Meggar is found to be ground. Most probable location of the ground will be
The running winding of a single phase motor on testing with Meggar is found to be ground. Most probable location of the ground will be
Which of the following motors can be used for unity power factor ?
Which of the following motors can be used for unity power factor ?
The motor used on small lathes is usually
The motor used on small lathes is usually
In a capacitor start single-phase motor, when capacitor is replaced by a resistance
In a capacitor start single-phase motor, when capacitor is replaced by a resistance
A.C. series motor as compared to D.C. series motor has
A.C. series motor as compared to D.C. series motor has
In a A.C. series motor armature coils are usually connected to commutator
In a A.C. series motor armature coils are usually connected to commutator
A repulsion motor is equipped with
A repulsion motor is equipped with
In which single-phase motor, the rotor has no teeth or winding ?
In which single-phase motor, the rotor has no teeth or winding ?
Two-value capacitor motor finds increased application as compressor motor in small home air-conditioners because
Two-value capacitor motor finds increased application as compressor motor in small home air-conditioners because
When a D.C. series motor is connected to A.C. supply, the power factor will be low because of
When a D.C. series motor is connected to A.C. supply, the power factor will be low because of
In case of high speed universal motor which of the following needs more attention ?
In case of high speed universal motor which of the following needs more attention ?
Which of the following motors can be run on AC. as well as D.C. supply ?
Which of the following motors can be run on AC. as well as D.C. supply ?
In repulsion motor, maximum torque is developed when
In repulsion motor, maximum torque is developed when
In a universal motor, the most common cause of brush sparking is
In a universal motor, the most common cause of brush sparking is
Which of the following motors is used in tape-recorders ?
Which of the following motors is used in tape-recorders ?
Burning out of winding is due to
Burning out of winding is due to
Which of the following motor will have relatively higher power factor ?
Which of the following motor will have relatively higher power factor ?
In A.C. series motor compensating winding is employed to
In A.C. series motor compensating winding is employed to
Which of the following statements regarding single-phase induction motoris correct ?
Which of the following statements regarding single-phase induction motoris correct ?
In repulsion motor direction of rotation of motor
In repulsion motor direction of rotation of motor
Which of the following motors is inherently self starting ?
Which of the following motors is inherently self starting ?
As hysteresis motors are free from mechanical and magnetic vibrations therefore these are considered as suitable for
As hysteresis motors are free from mechanical and magnetic vibrations therefore these are considered as suitable for
Which of the following applications always have some load whenever switched on ?
Which of the following applications always have some load whenever switched on ?
Which of the following statements regarding two value capacitor motor is incorrect ?
Which of the following statements regarding two value capacitor motor is incorrect ?
A shaded pole motor can be used for
A shaded pole motor can be used for
The rotor of a hysteresis motor is made of
The rotor of a hysteresis motor is made of
Which of the following motors will operate at high power factor ?
Which of the following motors will operate at high power factor ?
In capacitor start single-phase motors
In capacitor start single-phase motors
After the starting winding of a single phase induction motor is disconnected from supply, it continues to run only on
After the starting winding of a single phase induction motor is disconnected from supply, it continues to run only on
In repulsion motor, zero torque is developed when
In repulsion motor, zero torque is developed when
In a capacitor start and run motors the function of the running capacitor in series with the auxiliary winding is to
In a capacitor start and run motors the function of the running capacitor in series with the auxiliary winding is to
Direction of rotation of a split phase motor can be reversed by reversing the connection of
Direction of rotation of a split phase motor can be reversed by reversing the connection of
A capacitor-start single phase induction motor is switched on to supply with its capa-citor replaced by an inductor of equivalent reactance value. It will
A capacitor-start single phase induction motor is switched on to supply with its capa-citor replaced by an inductor of equivalent reactance value. It will
A single-phase induction motor is
A single-phase induction motor is
Which of the following statements regarding a reluctance motor is incorrect ?
Which of the following statements regarding a reluctance motor is incorrect ?
Which of the following single-phase induction motors is generally used in time phonographs?
Which of the following single-phase induction motors is generally used in time phonographs?
In split-phase motor auxiliary winding is of
In split-phase motor auxiliary winding is of
The motor used for the compressors is
The motor used for the compressors is
The electric motor used in portable drills is
The electric motor used in portable drills is
A hysteresis motor works on the principle of
A hysteresis motor works on the principle of
Which of the following statements regarding hysteresis motor is in incorrect ?
Which of the following statements regarding hysteresis motor is in incorrect ?
A schrage motor can run on
A schrage motor can run on
A universal motor is one which
A universal motor is one which
Which of the following single-phase motors has relatively poor starting torque ?
Which of the following single-phase motors has relatively poor starting torque ?
Which of the following motors is used for unity power factor ?
Which of the following motors is used for unity power factor ?
Which of the following motors is preferred for tape-recorders?
Which of the following motors is preferred for tape-recorders?
Which of the following motors has two separate windings on the motor ?
Which of the following motors has two separate windings on the motor ?
Which of the following motors is used in a situation where load increases with speed ?
Which of the following motors is used in a situation where load increases with speed ?
The wattage rating for a ceiling fan motor will be in the range
The wattage rating for a ceiling fan motor will be in the range
The rotor slots, in an induction motor, are usually not quite parallel to the shaft because it
The rotor slots, in an induction motor, are usually not quite parallel to the shaft because it
Hysteresis motor is particularly useful for high-quality record players and tape-recorders because
Hysteresis motor is particularly useful for high-quality record players and tape-recorders because
In a split phase motor
In a split phase motor
In a two value capacitor motor, the capacitor used for running purposes is
In a two value capacitor motor, the capacitor used for running purposes is
In a split phase motor, the running winding should have
In a split phase motor, the running winding should have
The repulsion start induction run motor is used because of
The repulsion start induction run motor is used because of
Centrifugal switch disconnects the auxiliary winding of the motor at about ____ percent of synchronous speed
Centrifugal switch disconnects the auxiliary winding of the motor at about ____ percent of synchronous speed
The rotor developed by a single-phase motor at starting is
The rotor developed by a single-phase motor at starting is
Speed torque characteristic of a repulsion induction motor is similar to that of a D.C.
Speed torque characteristic of a repulsion induction motor is similar to that of a D.C.
The speed/load characteristics of a universal motor is same as that of
The speed/load characteristics of a universal motor is same as that of
If a D.C. series motor is operated on A.C. supply, it will
If a D.C. series motor is operated on A.C. supply, it will
In case of a shaded pole motor the direction of rotation of the motor is
In case of a shaded pole motor the direction of rotation of the motor is
To reverse the direction of rotation of acapacitor start motor while it is running we should
To reverse the direction of rotation of acapacitor start motor while it is running we should
Which of the following motor will give the highest starting torque ?
Which of the following motor will give the highest starting torque ?
The speed of a universal motor is usually reduced by using
The speed of a universal motor is usually reduced by using
Which of the following statements regarding reluctance-start motor is incorrect ?
Which of the following statements regarding reluctance-start motor is incorrect ?
A centrifugal switch is used to disconnect starting winding when motor has
A centrifugal switch is used to disconnect starting winding when motor has
The value of starting capacitor of a fractional horse power motor will be
The value of starting capacitor of a fractional horse power motor will be
Which of the following motors is used in mixies ?
Which of the following motors is used in mixies ?
The speed control of universal motor used for sewing machines is by
The speed control of universal motor used for sewing machines is by
Which of the following single-phase motors is suitable for timing and control purposes ?
Which of the following single-phase motors is suitable for timing and control purposes ?
The power factor of a single-phase induction motor is usually
The power factor of a single-phase induction motor is usually
Locked rotor current of a shaded pole motor is
Locked rotor current of a shaded pole motor is
Which motor is normally free from mechanical and magnetic vibrations ?
Which motor is normally free from mechanical and magnetic vibrations ?
The purpose of stator winding in the compensated repulsion motor is to
The purpose of stator winding in the compensated repulsion motor is to
Which type of load is offered by cranes and hoists ?
Which type of load is offered by cranes and hoists ?
The capacitors used in single-phase capacitor motors have no
The capacitors used in single-phase capacitor motors have no
If a particular application needs high speed and high starting torque, then which of the following motor will bepreferred ?
If a particular application needs high speed and high starting torque, then which of the following motor will bepreferred ?
The direction of rotation of an hysteresis motor is determined by
The direction of rotation of an hysteresis motor is determined by
Speed control of a universal motor is achieved by
Speed control of a universal motor is achieved by
In a hysteresis motor, the rotor must have
In a hysteresis motor, the rotor must have
The starting winding of a single-phase motor is placed in
The starting winding of a single-phase motor is placed in
Which of the following statements regarding repulsion-start induction motor is incorrect ?
Which of the following statements regarding repulsion-start induction motor is incorrect ?
The range of efficiency for shaded pole motors is
The range of efficiency for shaded pole motors is
The shaded pole motor is used for
The shaded pole motor is used for
In a ceilingfan employing capacitor run motor
In a ceilingfan employing capacitor run motor
Single phase induction motor usually operates on
Single phase induction motor usually operates on
If the centrifugal switch of a two-value capacitor motor using two capacitors fails to open then
If the centrifugal switch of a two-value capacitor motor using two capacitors fails to open then
In a capacitor start motor, the phase displacement between starting and running winding can be nearly
In a capacitor start motor, the phase displacement between starting and running winding can be nearly
A universal motor can run on
A universal motor can run on
If starting winding of a single-phase induction motor is left in the circuit, it will
If starting winding of a single-phase induction motor is left in the circuit, it will
In case of a reluctance motor, when the load is increased so that it cannot maintain synchronous speed the motor will
In case of a reluctance motor, when the load is increased so that it cannot maintain synchronous speed the motor will
Which of the following motors has highest starting torque ?
Which of the following motors has highest starting torque ?
If a single phase induction motor runs slower than normal, the most likely defect is
If a single phase induction motor runs slower than normal, the most likely defect is
If the capacitor of a single-phase motor is short-circuited
If the capacitor of a single-phase motor is short-circuited
For which of the applications a reluctance motor is preferred ?
For which of the applications a reluctance motor is preferred ?
If the centrifugal switch does not open at 70 to 80 percent of synchronous speed of motor, it would result in
If the centrifugal switch does not open at 70 to 80 percent of synchronous speed of motor, it would result in
In split phase motor main winding is of
In split phase motor main winding is of
In a single phase motor the centrifugal switch
In a single phase motor the centrifugal switch
In a shaded pole single-phase motor, the revolving field is produced by the use of
In a shaded pole single-phase motor, the revolving field is produced by the use of
Torque developed by a single phase induction motor at starting is
Torque developed by a single phase induction motor at starting is
The direction of rotation of universal motor can be reversed the by reversing the flow of current through
The direction of rotation of universal motor can be reversed the by reversing the flow of current through
Short-circuiter is used in
Short-circuiter is used in
A shaded pole motor does not possess
A shaded pole motor does not possess
The speed of a universal motor is generally reduced by using
The speed of a universal motor is generally reduced by using
The wattage of motor for driving domestic sewing machine will be around
The wattage of motor for driving domestic sewing machine will be around
Which of the following motor will give relatively high starting torque ?
Which of the following motor will give relatively high starting torque ?
Starting winding of a single phase motor of a refrigerator is disconnected from the circuit by means of a
Starting winding of a single phase motor of a refrigerator is disconnected from the circuit by means of a
