Which of the following statements regarding single-phase induction motoris correct ?
Which of the following statements regarding single-phase induction motoris correct ?
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
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
The purpose of stator winding in the compensated repulsion motor is to
The purpose of stator winding in the compensated repulsion motor is to
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
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
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 ?
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
The speed of a universal motor is generally reduced by using
The speed of a universal motor is generally reduced by using
In a hysteresis motor, the rotor must have
In a hysteresis motor, the rotor must have
A repulsion motor is equipped with
A repulsion motor is equipped with
Most of the fractional horsepower motors have either
Most of the fractional horsepower motors have either
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 relatively high starting torque ?
Which of the following motor will give relatively high starting torque ?
A single-phase induction motor is
A single-phase induction motor is
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
Speed control of a universal motor is achieved by
Speed control of a universal motor is achieved by
The rotor of a hysteresis motor is made of
The rotor of a hysteresis motor is made of
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
The speed of a universal motor is usually reduced by using
The speed of a universal motor is usually reduced by using
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
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 motor is normally free from mechanical and magnetic vibrations ?
Which motor is normally free from mechanical and magnetic vibrations ?
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
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
Which of the following statements regarding repulsion-start induction motor is incorrect ?
Which of the following statements regarding repulsion-start induction motor is incorrect ?
Which of the following motors can be used for unity power factor ?
Which of the following motors can be used for unity power factor ?
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
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
Which type of load is offered by cranes and hoists ?
Which type of load is offered by cranes and hoists ?
In split phase motor main winding is of
In split phase motor main winding is of
A centrifugal switch is used to disconnect starting winding when motor has
A centrifugal switch is used to disconnect starting winding when motor has
In a split phase motor, the running winding should have
In a split phase motor, the running winding should have
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
The speed control of universal motor used for sewing machines is by
The speed control of universal motor used for sewing machines is by
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
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 ?
In repulsion motor, zero torque is developed when
In repulsion motor, zero torque is developed when
A.C. series motor as compared to D.C. series motor has
A.C. series motor as compared to D.C. series motor has
A hysteresis motor works on the principle of
A hysteresis motor works on the principle of
The range of efficiency for shaded pole motors is
The range of efficiency for shaded pole motors is
Short-circuiter is used in
Short-circuiter is used in
Which of the following motors is used in mixies ?
Which of the following motors is used in mixies ?
The motor used on small lathes is usually
The motor used on small lathes is usually
Which of the following motors has highest starting torque ?
Which of the following motors has highest starting torque ?
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
The capacitors used in single-phase capacitor motors have no
The capacitors used in single-phase capacitor motors have no
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
Which of the following statements regarding hysteresis motor is in incorrect ?
Which of the following statements regarding hysteresis motor is in incorrect ?
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
In a shaded pole motor, the shading coil usually consist of
In a shaded pole motor, the shading coil usually consist of
The rotor developed by a single-phase motor at starting is
The rotor developed by a single-phase motor at starting is
In repulsion motor direction of rotation of motor
In repulsion motor direction of rotation of motor
Which of the following statements regarding a reluctance motor is incorrect ?
Which of the following statements regarding a reluctance motor is incorrect ?
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
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 ?
In repulsion motor, maximum torque is developed when
In repulsion motor, maximum torque is developed when
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
Which of the following motor will have relatively higher power factor ?
Which of the following motor will have relatively higher power factor ?
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 split-phase motor auxiliary winding is of
In split-phase motor auxiliary winding is of
A shaded pole motor does not possess
A shaded pole motor does not possess
The motor used for the compressors is
The motor used for the compressors is
The power factor of a single-phase induction motor is usually
The power factor of a single-phase induction motor is usually
Which of the following motor will give the highest starting torque ?
Which of the following motor will give the highest starting torque ?
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 ?
Which of the following motors will operate at high power factor ?
Which of the following motors will operate at high power factor ?
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
In which single-phase motor, the rotor has no teeth or winding ?
In which single-phase motor, the rotor has no teeth or winding ?
Locked rotor current of a shaded pole motor is
Locked rotor current of a shaded pole motor is
Single phase induction motor usually operates on
Single phase induction motor usually operates on
A universal motor can run on
A universal motor can run on
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
Which of the following motors is inherently self starting ?
Which of the following motors is inherently self starting ?
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 statements regarding reluctance-start motor is incorrect ?
Which of the following statements regarding reluctance-start motor is incorrect ?
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
A schrage motor can run on
A schrage motor can run on
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
In A.C. series motor compensating winding is employed to
In A.C. series motor compensating winding is employed to
A shaded pole motor can be used for
A shaded pole motor can be used for
In a split phase motor
In a split phase motor
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 applications always have some load whenever switched on ?
Which of the following applications always have some load whenever switched on ?
The repulsion start induction run motor is used because of
The repulsion start induction run motor is used because of
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
For which of the applications a reluctance motor is preferred ?
For which of the applications a reluctance motor is preferred ?
Which of the following statements regarding two value capacitor motor is incorrect ?
Which of the following statements regarding two value capacitor motor is incorrect ?
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 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 ?
Which of the following motors has two separate windings on the motor ?
Which of the following motors has two separate windings on the motor ?
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
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
If the capacitor of a single-phase motor is short-circuited
If the capacitor of a single-phase motor is short-circuited
Which of the following motors is preferred for tape-recorders?
Which of the following motors is preferred for tape-recorders?
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.
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?
Burning out of winding is due to
Burning out of winding is due to
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
Torque developed by a single phase induction motor at starting is
Torque developed by a single phase induction motor at starting is
In a single phase motor the centrifugal switch
In a single phase motor the centrifugal switch
In capacitor start single-phase motors
In capacitor start single-phase motors
The direction of rotation of an hysteresis motor is determined by
The direction of rotation of an hysteresis motor is determined by
A universal motor is one which
A universal motor is one which
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
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 used in tape-recorders ?
Which of the following motors is used in tape-recorders ?
The electric motor used in portable drills is
The electric motor used in portable drills is
