The value of the capacitor in a capacitor start motor controls the__________.

by

1 Answer

Answer :

The value of the capacitor in a capacitor start motor controls the starting torque

by

Related questions

The optimum percentage of excess air for combustion depends upon the__________ of the fuel.(A) Type (solid, liquid or gaseous)(B) Calorific value(C) Sulphur content(D) Ignition temperature

Description : The optimum percentage of excess air for combustion depends upon the__________ of the fuel. (A) Type (solid, liquid or gaseous) (B) Calorific value (C) Sulphur content (D) Ignition temperature

Last Answer : (A) Type (solid, liquid or gaseous)

Is there any relation between the capacitances of two capacitors used in two value capacitor start capacitor run motor?

Description : Is there any relation between the capacitances of two capacitors used in two value capacitor start capacitor run motor?

Last Answer : Ans: Starting capacitor has about 10 – 15 times high capacity than the value of running capacitor.

Reduction in the value of capacitance of a capacitor -start motor, results in reduced:

Description : Reduction in the value of capacitance of a capacitor -start motor, results in reduced: (A) noise (B) speed (C) starting torque (D) armature reaction

Last Answer : A

Explain the working of a single phase capacitor start induction motor.

Description : Explain the working of a single phase capacitor start induction motor. 

Last Answer : Single phase capacitor start induction motor https://youtu.be/31lvvzU5Puc

In the capacitor-start, capacitor-run single-phase induction motor

Description : In the capacitor-start, capacitor-run single-phase induction motor (A) two capacitors are connected across the main winding (B) when the centrifugal switch opens, the permanent capacitor is left ... left in the main winding circuit (D) two capacitors are connected across the auxiliary winding.

Last Answer : In the capacitor-start, capacitor-run single-phase induction motor when the centrifugal switch opens, the permanent capacitor is left in the auxiliary winding circuit

A capacitor start, capacitor run single phase induction motor is basically a : -

Description : A capacitor start, capacitor run single phase induction motor is basically a : -  a) ac series motor b) dc series motor c) 2 phase induction motor d) 3 phase induction motor

Last Answer : A capacitor start, capacitor run single phase induction motor is basically a : -  2 phase induction motor 

In a capacitor start single-phase induction motor, the capacitor is connected in: ...

Description : In a capacitor start single-phase induction motor, the capacitor is connected in:  (A) series with the main winding (B) series with the auxiliary winding (C) series with both the windings (D) parallel with the auxiliary winding .

Last Answer : In a capacitor start single-phase induction motor, the capacitor is connected in: series with the auxiliary winding 

. The most widely used crude topping column in refineries is the__________ column.(A) Bubble-cap(B) Packed bed(C) Fluidised bed(D) Perforated plate

Description : . The most widely used crude topping column in refineries is the__________ column. (A) Bubble-cap (B) Packed bed (C) Fluidised bed (D) Perforated plate

Last Answer : (A) Bubble-cap

The length of the tube necessary for the boundary layer to reach thecentre of the tube and for fully developed flow to be established is called the__________ length.(A) Equivalent(B) Transition(C) Prandtl mixing(D) None of these

Description : The length of the tube necessary for the boundary layer to reach thecentre of the tube and for fully developed flow to be established is called the __________ length. (A) Equivalent (B) Transition (C) Prandtl mixing (D) None of these

Last Answer : (B) Transition

The secondary lymphoid tissues include the__________ and_____________ a. Thymus; Bone Marrow b. Bone Marrow; Tonsils c. Spleen; Thymus d. Spleen; Lymph Nodes

Description : The secondary lymphoid tissues include the__________ and_____________ a. Thymus; Bone Marrow b. Bone Marrow; Tonsils c. Spleen; Thymus d. Spleen; Lymph Nodes

Last Answer : d. Spleen; Lymph Nodes

Blades of disc harrow are sharpened from the_______ side penetrate more readily than blades sharpened from the__________ side a) convex, concave c) concave, convex b) Front, rear d) Rear, front

Description : Blades of disc harrow are sharpened from the_______ side penetrate more readily than blades sharpened from the__________ side a) convex, concave c) concave, convex b) Front, rear d) Rear, front

Last Answer : c) concave, convex

TIIC is sponsored by the__________. A. Government of Karnataka. B. Government of Andhra Pradesh. C. Government of Kerala. D. Government of Tamil Nadu.

Description : TIIC is sponsored by the__________. A. Government of Karnataka. B. Government of Andhra Pradesh. C. Government of Kerala. D. Government of Tamil Nadu.

Last Answer : D. Government of Tamil Nadu.

A single-phase induction motor having a relatively high starting torque, is the ___________. A. shaded pole motor B. wound-rotor motor C. capacitor-start motor D. resistance-start motor

Description : A single-phase induction motor having a relatively high starting torque, is the ___________. A. shaded pole motor B. wound-rotor motor C. capacitor-start motor D. resistance-start motor

Last Answer : Answer: C

Differentiate between “capacitor start “and “capacitor start capacitor run“ induction motor?

Description : Differentiate between “capacitor start “and “capacitor start capacitor run“ induction motor?

Last Answer : In capacitor start motor, capacitor is connected in series with the starting winding. But it will be disconnected fro m the supply, when the motor picks up its speed. But ... capacitor are not disconnected, but always connected in the supply .so it has high starting and running torque.

Give application of capacitor start capacitor run Induction motor

Description : Give application of capacitor start capacitor run Induction motor

Last Answer : Ceiling fan, air conditioner, blowers, table fans, conveyors etc

How is the direction of a capacitor start Induction motor be reversed?

Description : How is the direction of a capacitor start Induction motor be reversed?

Last Answer : The direction of rotation can be reversed by interchanging the terminals of either the main winding or the starting winding.

Why is the starting torque of a capacitor start induction motor high?

Description : Why is the starting torque of a capacitor start induction motor high?

Last Answer : Ans: The capacitor C in the starting winding is so chosen that Is leads Im by 75 degree. Since the starting torque is directly proportional to Sin Ф, and it is quite high in capacitor-start induction motor.

Reduction in the capacitance of a capacitor-start motor, results in reduced (A) Noise. (B) Speed. (C) Starting torque. (D) Armature reaction.

Description : Reduction in the capacitance of a capacitor-start motor, results in reduced (A) Noise. (B) Speed. (C) Starting torque. (D) Armature reaction.

Last Answer : Ans: C Reduction in the capacitance reduces starting voltage, which results in reduced starting torque.

In a capacitor start single-phase induction motor, the capacitor is connected (A) in series with main winding. (B) in series with auxiliary winding. (C) in series with both the windings. (D) in parallel with auxiliary winding.

Description : In a capacitor start single-phase induction motor, the capacitor is connected (A) in series with main winding. (B) in series with auxiliary winding. (C) in series with both the windings. (D) in parallel with auxiliary winding.

Last Answer : Ans: B To make single phase motor self start. We split the phases at 90 degree. Hence, motor behaves like a two phase motor.

A ceiling fan uses (A) split-phase motor. (B) capacitor start and capacitor run motor. (C) universal motor. (D) capacitor start motor.

Description : A ceiling fan uses (A) split-phase motor. (B) capacitor start and capacitor run motor. (C) universal motor. (D) capacitor start motor.

Last Answer : Ans: D To give starting torque and to maintain speed.

As compared to a split phase motor, a capacitor start motor has _____.

Description :  As compared to a split phase motor, a capacitor start motor has _____.

Last Answer :  As compared to a split phase motor, a capacitor start motor has higher starting torque.

For a single phase capacitor start induction motor, which of the following statements is valid?

Description : For a single phase capacitor start induction motor, which of the following statements is valid?  A) The capacitor is used for power factor improvement B) The direction of rotation can be ... rotation cannot be changed D) The direction of rotation can be changed by interchanging the supply terminals

Last Answer : For a single phase capacitor start induction motor, which of the following statements is valid?  A) The capacitor is used for power factor improvement B) The direction of rotation can be ... cannot be changed D) The direction of rotation can be changed by interchanging the supply terminals

To reverse the direction of rotation of a capacitor start motor while it is running we should?

Last Answer : To reverse the direction of rotation of a capacitor start motor while it is running we should disconnect motor from the supply till it stops then reconnect it to supply with reversed connection of main or auxiliary winding.

In a capacitor start single-phase motor, when capacitor is replaced by a resistance?

Last Answer : In a capacitor start single-phase motor, when capacitor is replaced by a resistance motor will continue to run in same direction.

A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by...

Description : A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by an inductor of equivalent reactance value. It will?

Last Answer : A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by an inductor of equivalent reactance value. It will not start at all.

In a capacitor start motor, the phase displacement between starting and running winding can be nearly?

Last Answer : In a capacitor start motor, the phase displacement between starting and running winding can be nearly 90°.

If the centrifugal switch of a two-value capacitor motor using two capacitors fails to open then?

Last Answer : If the centrifugal switch of a two-value capacitor motor using two capacitors fails to open then Electrolytic capacitor will, in all probability, suffer break down.

Two-value capacitor motor finds increased application as compressor motor in small home air-conditioners because?

Last Answer : Two-value capacitor motor finds increased application as compressor motor in small home air-conditioners because it has low starting as well as running currents at relatively high power factor.

In a two value capacitor motor, the capacitor used for running purposes is?

Last Answer : In a two value capacitor motor, the capacitor used for running purposes is paper spaced oil filled type.

The value of starting capacitor of a fractional horse power motor will be?

Last Answer : The value of starting capacitor of a fractional horse power motor will be 300 uF .

Why is a capacitor used in a single phase motor and not in three phase motor ?

Description : Why is a capacitor used in a single phase motor and not in three phase motor ?

Last Answer : In 1-phase induction motor capacitor work is generate the auxiliary winding current than excite the main winding to rotor starts rotate. After rotor start rotating about 75% of their speed than auxiliary ... emf to start the motor.so,in 3-phase induction motor is self start induction motor.

The synchronous motor can be used as a capacitor

Description : The synchronous motor can be used as a capacitor • By increasing excitation • By decreasing excitation • By increasing speed • By decreasing speed

Last Answer : The synchronous motor can be used as a capacitor By increasing excitation

What is the main function in the use of a capacitor for starting a single phase motor? A. Reduce radio interference B. Split the phase to establish a rotating magnetic field C. Reduce the phase angle D. Prolong the life of the starting contacts

Description : What is the main function in the use of a capacitor for starting a single phase motor? A. Reduce radio interference B. Split the phase to establish a rotating magnetic field C. Reduce the phase angle D. Prolong the life of the starting contacts

Last Answer : Answer: B

A single-phase induction motor starts, comes up to about 75% rated speed, slows down to a lower speed, and accelerates again. The problem is most likely in the ____________. A. starting winding B. running winding C. starting capacitor D. running centrifugal switch

Description : A single-phase induction motor starts, comes up to about 75% rated speed, slows down to a lower speed, and accelerates again. The problem is most likely in the ____________. A. starting winding B. running winding C. starting capacitor D. running centrifugal switch

Last Answer : Answer: B

As shown in the illustration, which of the listed types of motor controllers and starters is indicated? EL-0012 A. Across-the-line B. Capacitor C. Autotransformer D. Part-winding

Description : As shown in the illustration, which of the listed types of motor controllers and starters is indicated? EL-0012 A. Across-the-line B. Capacitor C. Autotransformer D. Part-winding

Last Answer : Answer: C

What is the function of capacitor in single phase induction motor?

Description : What is the function of capacitor in single phase induction motor?

Last Answer : To make phase difference between starting and running winding, to improve PF and to get more torque

In a ceiling fan employing capacitor run motor?

Last Answer : In a ceiling fan employing capacitor run motor secondary winding surrounds the primary winding.

If the capacitor of a single-phase motor is short-circuited?

Last Answer : If the capacitor of a single-phase motor is short-circuited the motor will not start.

Can we use the synchronous motor as the synchronous capacitor?

Description : Can we use the synchronous motor as the synchronous capacitor?

Last Answer : Yes, we can use the synchronous motor as the synchronous capacitor when the synchrnous motor is overexcited.

The lobe of the brain that is the largest and controls abstract thought is the ____________ lobe. a) frontal The frontal lobe also controls information storage or memory and motor function.

Description : The lobe of the brain that is the largest and controls abstract thought is the ____________ lobe. a) frontal The frontal lobe also controls information storage or memory and motor function ... and other cortical areas. d) occipital The occipital lobe is responsible for visual interpretation.

Last Answer : a) frontal The frontal lobe also controls information storage or memory and motor function.

For process boilers , combustion air fans must meet the following requirements ___ a. The fan motor shall be driven by a variable speed drive b. The fan motor shall include controls that limit the fan motor demand to no more than 30 %. c. Both a. & b. d. None of the above

Description : For process boilers , combustion air fans must meet the following requirements ___ a. The fan motor shall be driven by a variable speed drive b. The fan motor shall include controls that limit the fan motor demand to no more than 30 %. c. Both a. & b. d. None of the above

Last Answer : c. Both a. & b.

Why do we use capacitor-start induction motors in applications requiring high starting torque in preference to repulsion induction motors?

Description : Why do we use capacitor-start induction motors in applications requiring high starting torque in preference to repulsion induction motors?

Last Answer : Capacitors are easily available, cheaper and reliable. Repulsion-induction motors posses a special commutator and brushes that require maintenance. Most manufacturers have stopped making them.

Why capacitor –start induction motors advantageous?

Description : Why capacitor –start induction motors advantageous?

Last Answer : In capacitor start induction motors capacitor is connected in series with the auxiliary winding. When speed of the motor approaches to 75 to 80% of the synchronous speed the starting winding gets ... torque is proportional to phase angle ά and hence such motors produce very high starting torque.

Give applications of Capacitor start Induction run motors.

Description : Give applications of Capacitor start Induction run motors.

Last Answer : Drilling machine, centrifugal pump, grinders , refrigerator etc

Why do we use capacitor-start induction motors in applications requiring high starting torque in preference to repulsion induction motors?

Description : Why do we use capacitor-start induction motors in applications requiring high starting torque in preference to repulsion induction motors?

Last Answer : Ans : Capacitors are easily available, cheaper and reliable. Repulsion-induction motors posses a special commutator and brushes that require maintenance. Most manufacturers have stopped making them.

In a capacitor start and run motors the function of the running capacitor in series with the auxiliary winding is to?

Last Answer : In a capacitor start and run motors the function of the running capacitor in series with the auxiliary winding is to improve power factor.

In capacitor start single-phase motors?

Last Answer : In capacitor start single-phase motors current in the starting winding leads the voltage.

Voltage build up in an isolated induction generator depends on A. Capacitor bank value B. Residual magnetism of the rotor iron C. Residual magnetism of the stator iron a) A, B b) A, B, C c) B d) A, C

Description : Voltage build up in an isolated induction generator depends on A. Capacitor bank value B. Residual magnetism of the rotor iron C. Residual magnetism of the stator iron a) A, B b) A, B, C c) B d) A, C

Last Answer : Ans: A

The value of the capacitance depends upon the________________? A.voltage applied B. thickness of the capacitor plates C. geometry of the capacitor D. dinsity of the capacitor plates

Description : The value of the capacitance depends upon the________________? A.voltage applied B. thickness of the capacitor plates C. geometry of the capacitor D. dinsity of the capacitor plates

Last Answer : Ans: C

What is the value of the capacitor in the astern valve position circuit shown in the illustration? EL-0099 A. 100 kFarad B. 0.5 microfarad C. 0.5 millifarad D. 50 kFarad

Description : What is the value of the capacitor in the astern valve position circuit shown in the illustration? EL-0099 A. 100 kFarad B. 0.5 microfarad C. 0.5 millifarad D. 50 kFarad

Last Answer : Answer: B