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List different starting methods of three phase synchronous motor. Explain any one of them.

in Electrical Engineering

List different starting methods of three phase synchronous motor. Explain any one of them.

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List the speed control methods of three phase induction motor and explain any one method.

List the speed control methods of three phase induction motor and explain any one method.

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List any two direct methods of level measurement. Explain Hydrostatic method of level measurement. Give one advantage and one disadvantage of it.

List any two direct methods of level measurement. Explain Hydrostatic method of level measurement. Give one advantage and one disadvantage of it.

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List the methods of Line Support Erection and explain in brief any one.

List the methods of Line Support Erection and explain in brief any one.

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What are the different methods for the starting of a synchronous motor ?

What are the different methods for the starting of a synchronous motor ?

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State the various lighting calculations methods and describe any one of them.

State the various lighting calculations methods and describe any one of them.

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State the different methods of improving string efficiency. Explain any one method in detail.

State the different methods of improving string efficiency. Explain any one method in detail.

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Classify different lighting calculation methods and explain any one.

Classify different lighting calculation methods and explain any one.

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Describe any two methods of starting synchronous motors.

Describe any two methods of starting synchronous motors.

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Name any two methods of starting synchronous motors.

Name any two methods of starting synchronous motors.

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State methods of starting of synchronous motor.

State methods of starting of synchronous motor.

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State the purpose of lighting control. List different types of dimmers. Explain any two dimmers with suitable diagrams.

State the purpose of lighting control. List different types of dimmers. Explain any two dimmers with suitable diagrams.

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List different torques in synchronous motor.

List different torques in synchronous motor.

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Explain the reason for a single phase induction motor being not self-starting.

Explain the reason for a single phase induction motor being not self-starting.

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Explain with a neat circuit diagram only the Scott connection scheme for the conversion of three-phase supply to two-phase supply. Name one application of the same.

Explain with a neat circuit diagram only the Scott connection scheme for the conversion of three-phase supply to two-phase supply. Name one application of the same.

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Classify various electric heating methods and explain them briefly.

Classify various electric heating methods and explain them briefly.

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List any two non-contact type level measurement methods.

List any two non-contact type level measurement methods.

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List the various errors occurred in dynamometer type wattmeter and describe the way of compensating any one type of error.

List the various errors occurred in dynamometer type wattmeter and describe the way of compensating any one type of error.

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What are the basic principles of three phase synchronous motor?

What are the basic principles of three phase synchronous motor?

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What are the principles of three-phase synchronous motor?

What are the principles of three-phase synchronous motor?

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Three phase induction motor can never run on synchronous speed. Justify.

Three phase induction motor can never run on synchronous speed. Justify.

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State why three phase induction motor never runs on synchronous speed.

State why three phase induction motor never runs on synchronous speed.

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List different types of faults occured on a power system. Draw necessary sketches (any four)

List different types of faults occured on a power system. Draw necessary sketches (any four)

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List different transmission line components used for power transmission. (any four)

List different transmission line components used for power transmission. (any four)

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Mention the methods for starting an induction motor?

Mention the methods for starting an induction motor?

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Explain the conditions for setting up negative phase sequence currents in an alternator. Draw the protective scheme to detect them and operate the CB.

Explain the conditions for setting up negative phase sequence currents in an alternator. Draw the protective scheme to detect them and operate the CB.

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Explain hunting and phase swinging in synchronous motor.

Explain hunting and phase swinging in synchronous motor.

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A plant consists of two 10 MVA generators of reactance 18% each and two 5 MVA generators of 12% each. All are connected to bus bar to supply a load through three step up transformers of 8 MVA each having reactance of 8%. Determine fault MVA on HV side of any one transformer.

A plant consists of two 10 MVA generators of reactance 18% each and two 5 MVA generators of 12% each. All are connected to bus bar to supply a load through three step up transformers of 8 MVA each having reactance of 8%. Determine fault MVA on HV side of any one transformer.

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Why is a synchronous motor self-starting?

Why is a synchronous motor self-starting?

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Explain the principle of working of a three-phase induction motor.

Explain the principle of working of a three-phase induction motor.

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List the conditions for parallel operation of three-phase transformers.

List the conditions for parallel operation of three-phase transformers.

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List any four applications of BLDC motor.

List any four applications of BLDC motor.

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List various losses occurring in synchronous motor.

List various losses occurring in synchronous motor.

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Give some methods available for measuring three-phase power.

Give some methods available for measuring three-phase power.

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State the function of strain gauge. Give its types and explain the working of any one type of it.

State the function of strain gauge. Give its types and explain the working of any one type of it.

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Explain the thermal triggering method of SCR. Enlist different triggering methods of SCR.

Explain the thermal triggering method of SCR. Enlist different triggering methods of SCR.

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Give the specification of a three-phase transformer as per IS 1180 (Part 1) 1989 (any four).

Give the specification of a three-phase transformer as per IS 1180 (Part 1) 1989 (any four).

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Describe the method of converting a three-phase to a two-phase transformer by neat diagram. State any two applications.

Describe the method of converting a three-phase to a two-phase transformer by neat diagram. State any two applications.

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State any four advantages of having stationary armature in case of three phase alternator.

State any four advantages of having stationary armature in case of three phase alternator.
Answer : In a three-phase alternator, having a stationary armature (i.e., the armature is fixed and the rotor rotates) provides several advantages: 1. **Simplified Design**: A stationary ... seen in machines with rotating armatures. This leads to lower maintenance requirements and longer operational life....

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in Electrical Engineering

Explain the different controlling methods for enhancing interior applications.

Explain the different controlling methods for enhancing interior applications.

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Write any two differences between single-phase and three-phase transformers.

Write any two differences between single-phase and three-phase transformers.

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Explain with the help of a neat diagram the working of a 3-phase autotransformer. Write any two applications.

Explain with the help of a neat diagram the working of a 3-phase autotransformer. Write any two applications.

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Define slip and synchronous speed of 3 phase induction motor.

Define slip and synchronous speed of 3 phase induction motor.

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What is the construction and working principle of single phase synchronous motor?

What is the construction and working principle of single phase synchronous motor?

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Where is 3 phase synchronous motor used?

Where is 3 phase synchronous motor used?

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Explain with the help of a neat diagram the following methods of speed control for a DC series motor: (i) Field diverter method. (ii) Tapped field method.

Explain with the help of a neat diagram the following methods of speed control for a DC series motor: (i) Field diverter method. (ii) Tapped field method.

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A 3 φ I.M. has synchronous speed of 250rpm and 4% slip at full load. The rotor has a resistance of 0.02Ω/ph and stand still reactance of 0.15Ω/ph. Calculate i) The speed at which max torque is developed. ii) The ratio of maximum to F. L. torque. iii) The ratio of maximum to starting torque.

A 3 φ I.M. has synchronous speed of 250rpm and 4% slip at full load. The rotor has a resistance of 0.02Ω/ph and stand still reactance of 0.15Ω/ph. Calculate i) The speed at which max torque is developed. ii) The ratio of maximum to F. L. torque. iii) The ratio of maximum to starting torque.

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Explain Star and Delta connected three-phase balanced circuits.

Explain Star and Delta connected three-phase balanced circuits.

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Draw the power flow diagram of three phase induction motor.

Draw the power flow diagram of three phase induction motor.
Answer : The power flow diagram of a three-phase induction motor shows how electrical power is transformed into mechanical power and how it is distributed through various stages of the motor. Here's a ... motor. The input power is used to produce mechanical power, with losses occurring at various stages....

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Draw the torque slip characteristics of three phase induction motor.

Draw the torque slip characteristics of three phase induction motor.

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State working principle of three phase induction motor.

State working principle of three phase induction motor.

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