Last Answer : The direction of rotation of universal motor can be reversed the by reversing the flow of current through either armature winding or field winding.
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247 views
1 answer
asked
Mar 20, 2018
by
anonymous
The direction of rotation of an inverter fed 3-phase ac motor is reversed by (A) a mechanical reversing switch (B) reversing the input dc link voltage (C) operating the inverter as a rectifier (D) changing the sequence of switching
Last Answer : The direction of rotation of an inverter fed 3-phase ac motor is reversed by changing the sequence of switching
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153 views
1 answer
asked
Apr 28, 2018
by
anonymous
Last Answer : In case of a shaded pole motor the direction of rotation of the motor is from main pole to shaded pole.
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338 views
1 answer
asked
Mar 20, 2018
by
anonymous
Last Answer : The direction of rotation of an hysteresis motor is determined by position of shaded pole with respect to main pole.
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230 views
1 answer
asked
Mar 20, 2018
by
anonymous
Last Answer : In repulsion motor direction of rotation of motor is the same as that of brush shift.
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116 views
1 answer
asked
Mar 20, 2018
by
anonymous
Last Answer : In a split phase motor the starting winding is connected through a centrifugal switch.
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117 views
1 answer
asked
Mar 20, 2018
by
anonymous
Last Answer : In a split phase motor, the running winding should have low resistance and high inductance.
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99 views
1 answer
asked
Mar 20, 2018
by
anonymous
Last Answer : The direction of rotation of a D.C. series motor can be changed by interchanging field terminals.
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184 views
1 answer
asked
Mar 20, 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
1 answer
asked
Mar 18, 2018
by
anonymous
how can we reverse the direction of rotation of three phase induction motor ?
Last Answer : The direction of rotation of three phase induction motor can be reversed by plugging i.e by changing any two out of three phases of the supply to the stator of the Induction motor terminal.
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137 views
1 answer
asked
Oct 4, 2017
by
anonymous
Split phase induction motor
Last Answer : Split phase induction motor : There are two windings used in split phase induction motor. It is a type of single-phase induction motor. There are two winding one is called main winding and ... motor have low starting torque it is used for small fans, blowers, centrifugal pumps, grinders etc.
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230 views
1 answer
asked
Sep 20, 2018
by
anonymous
Last Answer : In split phase motor main winding is of thick wire placed at the bottom of the slots.
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83 views
1 answer
asked
Mar 20, 2018
by
anonymous
In a synchronous machine, if the field flux axis ahead of the armature field axis in the direction of rotation, the machine is operating as (1) synchronous motor (2) synchronous generator (3) asynchronous motor (4) asynchronous generator
Last Answer : In a synchronous machine, if the field flux axis ahead of the armature field axis in the direction of rotation, the machine is operating as synchronous generator
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599 views
1 answer
asked
May 1, 2018
by
anonymous
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.
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130 views
1 answer
asked
Mar 20, 2018
by
anonymous
In a single-phase induction motor, the operating direction is determined by the ________ A) Rotor B) Stator C) Starting circuit D) None of these
Last Answer : In a single-phase induction motor, the operating direction is determined by the Starting circuit
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127 views
1 answer
asked
Apr 29, 2018
by
anonymous
Last Answer : Single phase induction motor usually operates on 0.6 power factor lagging.
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126 views
1 answer
asked
Mar 20, 2018
by
anonymous
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.
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230 views
1 answer
asked
Mar 20, 2018
by
anonymous
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?
Last Answer : 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 at the slot edge where coil enters or comes out of the slot.
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116 views
1 answer
asked
Mar 20, 2018
by
anonymous
Last Answer : In a single phase motor the centrifugal switch disconnects auxiliary winding of the motor.
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269 views
1 answer
asked
Mar 20, 2018
by
anonymous
Last Answer : In a capacitor start motor, the phase displacement between starting and running winding can be nearly 90°.
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207 views
1 answer
asked
Mar 20, 2018
by
anonymous
Which statement is true concerning a split-phase induction motor? A. Motor rotation can be reversed without changing the windings or leads. B. Motor speed can be readily adjusted from zero to full ... proper wiring. D. Motor rotation can be reversed by reversing the leads on the starting winding.
Last Answer : Answer: D
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2 views
1 answer
List different starting methods of three phase synchronous motor. Explain any one of them.
Last Answer : Different Starting Methods of Three Phase Synchronous Motor: As synchronous motor is not self starting, different methods of starting are as follows: 1) By using an Induction (Pony) motor 2) ... . The rotor gets pulled into synchronism and starts running at constant speed as a synchronous motor.
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156 views
1 answer
asked
May 7, 2020
by
anonymous
State suitable single phase motor for following applications: (i) Table fan (ii) Mixers and Grinders
Last Answer : Application Suitable Single Phase Motor Table Fan 1) Capacitor split phase motor 2) Capacitor start capacitor run motor Mixers and Grinders 1) Universal motor 2) A.C. Series motor
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96 views
1 answer
asked
May 7, 2020
by
anonymous
Explain with neat circuit diagrams the procedures to perform no load and blocked rotor tests on three phase induction motor.
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127 views
0 answers
asked
Apr 16, 2020
by
anonymous
Explain the need and steps to conduct the reduced voltage running up test on the three phase induction motor.
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206 views
0 answers
asked
Apr 16, 2020
by
anonymous
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.
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259 views
6 answers
asked
Sep 2, 2019
by
anonymous
working principle of single phase motor
Last Answer : The Stator of single phase induction motor houses two windings 1. Main (Running) winding 2. Auxiliary (Starting ) winding Rotor of single phase induction motor is ... with starting winding or a capacitor may be permanently connected in series with Auxiliary (Starting ) winding.
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167 views
1 answer
asked
Aug 21, 2019
by
anonymous
Explain the working of a single phase capacitor start induction motor.
Last Answer : Single phase capacitor start induction motor https://youtu.be/31lvvzU5Puc
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393 views
2 answers
asked
Jul 30, 2019
by
anonymous
State any four advantages of three phase induction motor.
Last Answer : Advantages of three phase induction motor https://youtu.be/27OIOCKN05U
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136 views
2 answers
asked
Jul 30, 2019
by
anonymous
The slip of 400 V, three phase, 4 -pole induction motor when rotating at 1440 rpm is
Last Answer : The slip of 400 V, three phase, 4 -pole induction motor when rotating at 1440 rpm is 4 percent
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361 views
1 answer
asked
Apr 29, 2018
by
anonymous
What is the slip (as a percentage) when a 6 pole single phase induction motor operating on 220 V and 60 Hz is rotating at speed of 1140 rpm? A) 60% B) 5% C) 10% D) None of these
Last Answer : What is the slip (as a percentage) when a 6 pole single phase induction motor operating on 220 V and 60 Hz is rotating at speed of 1140 rpm? A) 60% B) 5% C) 10% D) None of these
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125 views
1 answer
asked
Apr 29, 2018
by
anonymous
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Last Answer : Reason is kinetic energy
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285 views
2 answers
asked
Mar 20, 2018
by
anonymous
Last Answer : If a single phase induction motor runs slower than normal, the most likely defect is worn bearings.
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170 views
1 answer
asked
Mar 20, 2018
by
anonymous
Last Answer : Starting winding of a single phase motor of a refrigerator is disconnected from the circuit by means of a magnetic relay.
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215 views
1 answer
asked
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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253 views
1 answer
asked
Mar 20, 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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160 views
1 answer
asked
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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95 views
1 answer
asked
Mar 18, 2018
by
anonymous
How is a three phase cage induction motor self starting?
Last Answer : Any type of induction motor is self starting. Because the reason for torqe production require two flux displaced by some angle theta.If theta is constant with time then torqe will be constant;if ... torqe also pulsating. In induction motor this angle theta is not pulsating.so it is self starting
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155 views
1 answer
asked
Mar 17, 2018
by
anonymous
How does a single phase induction motor work?
Last Answer : As we know that single phase induction is not self started because for self started we require atleast two revolving field but single phase induction motor has only one. So we provide extra ... 1phase IM classified as split phase IM, capacitor start capacitor run, capacitor start induction run.
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124 views
1 answer
asked
Mar 17, 2018
by
anonymous
What is mean by plugging in three phase induction motor?
Last Answer : Plugging in three-phase induction motor means interchanging of any two phases of a stator for quick stopping.
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153 views
1 answer
asked
Mar 3, 2018
by
anonymous
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explain the working of single phase induction motor.
Last Answer : Stator has two winding namely main winding and auxiliary winding.when single phase ac supply is given to the motor,its produces alternating field.this field cut by a cage rotor.so some emf ... due to this emf,rotor flux produced.the interaction between two fluxes produce torque.so rotor rotates.
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186 views
1 answer
asked
Oct 24, 2017
by
anonymous
Single Phase Induction Motor
Last Answer : Single Phase Induction Motor Single phase induction motor is mostly used in home, office, shop and many single phase appliances like pumps, ... torque and silent operation. It is uses where silent operation is required.
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528 views
1 answer
asked
Aug 9, 2017
by
anonymous
speed control methods of three phase induction motor?
Last Answer : Speed control of three phase induction motor
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363 views
2 answers
asked
Aug 9, 2017
by
anonymous
Last Answer : In split-phase motor auxiliary winding is of thin wire placed at the top of the slots.
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72 views
1 answer
asked
Mar 20, 2018
by
anonymous
The direction of rotation of a DC propulsion motor can be reversed by __________. A. reversing the field connections B. reversing the field and the armature connections C. wiring the field and armature in parallel D. wiring the field and armature in series
Last Answer : Answer: A
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3 views
1 answer
The direction of rotation of hysteresis motor is reversed by (A) Shift shaded pole with respect to main pole (B) Reversing supply lead (C) Either A or B (D) Neither A nor B
Last Answer : Ans: A This motor used single phase, 50Hz supply and stator has two windings. These are connected continuously from starting to running.
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23 views
1 answer
Why is the tip of my finger developing this split?
Last Answer : You are morphing into a cloven hoofed animal. The fingernail is just the first part of your body to become cloven; eventually it will occur on your other fingers, then toes. It's important to note that a ... Devil, sometimes used as a symbol or mark of the Devil. So you're on your way down .
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0 views
1 answer
asked
Mar 2
by
anonymous
How to Repair Split Ends
Last Answer : How to Repair Split Ends Do you have small wisps of hair sticking out from the ends of your locks? These are split ends. Not only do they ruin a great hairstyle, but split ends also make your hair ... 't be a problem. Follow these tips so you'll never have to split with your sleek, beautiful hair.
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14 views
1 answer
How to Split Wood
Last Answer : How to Split Wood Splitting wood correctly is important for a number of reasons. First, it will be easier to stack and store firewood if they were all regularly-sized. Second, it will be easier ... completely split the wood. Split the wood logs smaller and smaller until they are in the desired size.
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7 views
1 answer
asked
May 10, 2021
by
anonymous
How to Build a Split Rail Fence ?
Last Answer : How to Build a Split Rail Fence A split rail fence is one of the oldest methods of fencing, originating from the Old West days. The great thing about this type of fence is that it's also easy to ... a split rail fence. It's not hard to construct, and you'll be pleasantly surprised with the result.
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7 views
1 answer
asked
May 7, 2021
by
anonymous
