TWT is basically a(n) A) Amplifier B) An oscillator C) Wideband amplifier D) Tuned amplifier
Last Answer : TWT is basically a(n) Wideband amplifier
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Jun 18, 2018
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anonymous

Last Answer : Slip-rings in a synchronous motor carry direct current.
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Mar 20, 2018
by
anonymous

Last Answer : The efficiency of a properly designed synchronous motor will usually fall in range 85 to 95%.
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1 answer
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Mar 20, 2018
by
anonymous

A synchronous motor has better power factor as compared to that of an equivalent induction motor. This is mainly because?
Last Answer : A synchronous motor has better power factor as compared to that of an equivalent induction motor. This is mainly because stator supply is not required to produce magnetic field.
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Mar 20, 2018
by
anonymous

Last Answer : A synchronous motor running with normal excitation adjusts to load increases essentially by increase in armature current.
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Mar 20, 2018
by
anonymous

Last Answer : The operating speed of a synchronous motor can be changed to new fixed value by changing frequency.
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Mar 20, 2018
by
anonymous

Last Answer : A synchronous motor can develop synchronous torque at synchronous speed.
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Mar 20, 2018
by
anonymous

Last Answer : In case one phase of a three-phase synchronous motor is short-circuited the motor will not start.
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Mar 20, 2018
by
anonymous
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Last Answer : In a synchronous motor, the armature current has large values for high and low excitation.
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Mar 20, 2018
by
anonymous

Last Answer : The size of a synchronous motor decreases with the increase in flux density.
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Mar 20, 2018
by
anonymous

Last Answer : The duration of sudden short-circuit test on a synchronous motor is usually about one second.
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1 answer
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Mar 20, 2018
by
anonymous

The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as?
Last Answer : The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequency is known as pull-in torque.
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Mar 20, 2018
by
anonymous

Last Answer : The construction of a synchronous motor resembles an alternator.
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1 answer
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Mar 20, 2018
by
anonymous

Last Answer : If the field winding of an unloaded salient pole synchronous motor is open circuited, the motor will stop.
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258 views
1 answer
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Mar 20, 2018
by
anonymous

The maximum torque which a synchronous motor will develop at rest for any angular position of the rotor, at rated stator supply voltage and frequency, is known as?
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106 views
0 answers
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Mar 20, 2018
by
anonymous

Last Answer : The coupling angle or load angle of synchronous motor is defined as the angle between the rotor and the stator poles of opposite polarity.
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Mar 20, 2018
by
anonymous

Last Answer : If the synchronous motor, properly synchronised to the supply is running on no load and is having negligible loss then the stator current will be zero.
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Mar 20, 2018
by
anonymous

Last Answer : The armature current of the synchronous motor has large values for low and high excitation.
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Mar 20, 2018
by
anonymous

Which motor have more efficiency, synchronous motor or induction motor?
Last Answer : Synchronous motor has more efficiency.
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Mar 18, 2018
by
anonymous

If we change the excitation of synchronous machine will it affect on motor speed?
Last Answer : No, If we change the excitation of synchronous machine it will not affect on motor speed.
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Mar 18, 2018
by
anonymous

How can we reverse the direction of rotation of synchronous motor?
Last Answer : By reversing supply phase sequence we can reverse the direction of rotation of synchronous motor.
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305 views
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Mar 18, 2018
by
anonymous
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An electric motor in which both stator field and rotor rotates with same speed is called?
Last Answer : An electric motor in which both stator field and rotor rotates with same speed is called synchronous motor.
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Mar 18, 2018
by
anonymous

What is the maximum value of torque angle in synchronous motor?
Last Answer : The maximum value of torque angle in synchronous motor is 90 degrees electrical.
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Mar 18, 2018
by
anonymous

If the load of the normally excited synchronous motor is increased the power factor will?
Last Answer : If the load of the normally excited synchronous motor is increased the power factor will become lagging.
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Mar 18, 2018
by
anonymous
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Hunting in synchronous motor cannot be due to?
Last Answer : Hunting in synchronous motor cannot be due to windage friction.
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1 answer
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Mar 18, 2018
by
anonymous

The synchronous motor which works on leading power factor and does not drive any mechanical load is called?
Last Answer : The synchronous motor which works on leading power factor and does not drive any mechanical load is called synchronous condenser.
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163 views
1 answer
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Mar 18, 2018
by
anonymous

The damping winding in synchronous motor is generally used to?
Last Answer : The damping winding in synchronous motor is generally used to provide starting torque and prevent hunting.
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157 views
1 answer
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Mar 18, 2018
by
anonymous

If the field of synchronous motor is under excited, power factor will be?
Last Answer : If the field of synchronous motor is under excited, power factor will be lagging.
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1 answer
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Mar 18, 2018
by
anonymous

An unexcited single phase synchronous motor is ?
Last Answer : An unexcited single-phase synchronous motor is reluctance motor.
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1 answer
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Mar 18, 2018
by
anonymous

A synchronous motor can be made self starting by providing?
Last Answer : A synchronous motor can be made self-starting by providing damper bar.
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1 answer
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Mar 18, 2018
by
anonymous

In a synchronous motor which losses varies with load?
Last Answer : In a synchronous motor, copper losses varies with load.
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Mar 18, 2018
by
anonymous

The back emf of synchronous motor depends on?
Last Answer : The back emf of synchronous motor depends on load angle.
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1 answer
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Mar 18, 2018
by
anonymous

Synchronous motor always runs at which speed?
Last Answer : Synchronous motor always runs at synchronous speed.
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Mar 18, 2018
by
anonymous

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.
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1 answer
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Mar 18, 2018
by
anonymous

The synchronous motor will develop maximum power when the load angle is?
Last Answer : The synchronous motor will develop maximum power when the load angle is 900.
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226 views
1 answer
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Mar 18, 2018
by
anonymous
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what will happen when excitation of an unloaded salient pole synchronous motor suddenly gets disconnected?
Last Answer : When excitation of an unloaded salient pole synchronous motor suddenly gets disconnected the motor will stop.
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1 answer
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Mar 18, 2018
by
anonymous

Three phase synchronous motor will have how many sliprings?
Last Answer : Three phase synchronous motor will have two sliprings.
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Mar 18, 2018
by
anonymous
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When the stator windings are connected in such a fashion that the number of poles are made half, the speed of the rotor of a synchronous motor?
Last Answer : When the stator windings are connected in such a fashion that the number of poles are made half, the speed of the rotor of a synchronous motor increases to two times the original value.
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1 answer
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Mar 20, 2018
by
anonymous

106 views
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asked
Nov 11, 2018
by
Ganesh

Which type of motor would you recommend for using in a steel mill and on an electric vehicle? Explain your answer
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Mc Master Motor
Last Answer : The McMaster motor is based on the principle of the rotary engine. The McMaster motor is the centerpiece of a totally new way of looking at motorized transportation which involves the ... McMaster motor will be considerably cheaper to operate once its unique fuel sources are commercially developed.
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DC MOTOR MCQ
Last Answer : 101. Which of the following loss in a D.C. generator is dissipated in the form of heat? (a) Mechanical loss (b) Core loss (c) Copper loss (d) All of the above Ans: d 102. Which of the following ... (b) does not run as a generator (c) also runs as a motor comes to stop after sometime Ans: a
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3 answers

What is the purpose of Overload Protection in a motor circuit?
Last Answer : Ans. The Overload Protection is used in a motor circuit to protect it from sustained over currents.
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1 answer

What is a motor?
Last Answer : Ans. Motor is a machine which converts electrical energy into mechanical energy.
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1 answer

What is Motor Brake ?
Last Answer : The most commonly used brakes are friction brakes. They work on the principle that friction can be used in converting the mechanical energy of an object in motion into heat energy. This ... with an electronic motor brakes. These brakes are also suitable for power-generating machines like windmills.
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Write the steps to rewind an electric motor
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MCQ on Motor Control Center
Last Answer : 1. MCC stands for ______ a. Motor Control Center b. Motor Control Cost c. Machine Components Center d. None of the above Answer : a. Motor Control Center 2. MCC contains _____ a. Fuse b. MCB c. ... a) Start the motor b) Accelerate the motor c) Decelerate the motor d) Stop the motor Answer : a
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Explain how cooling is achieved in pipe ventilated type during motor enclosures
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May 24, 2021
by
izoh

Basic electrical engineering
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Explain the necessity of starter for D.C. motor. State various types of D.C. motor starter.
Last Answer : Necessity of Starter for D.C. Motor: Armature current is given by equation Ia = (V−Eb)/Ra i) If the motor is at standstill or rest, back emf Eb is zero (as Eb= ZNP/(60A), at start speed N ... . Types of D.C. motor starters: i) Two point starter ii)Three point starter iii) Four point starter
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1 answer
asked
May 22, 2020
by
anonymous
