What is a conveyor motor?

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asked Mar 11, 2018 by anonymous

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asked May 1, 2018 by anonymous

The motor used for electric traction is

The motor used for electric traction is (1) D.C. shunt motor (3) D.C. series motor (2) D.C. compound motor (4) Synchronous motor

Last answer: The motor used for electric traction is D.C. series motor

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1.0k views 1 answer

asked Mar 11, 2018 by anonymous

Which type of motor is used in lift?

Last answer: Synchronous motor

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61 views 1 answer

asked Mar 11, 2018 by anonymous

Why DC motor is used for traction?

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67 views 0 answers

asked Mar 11, 2018 by anonymous

Which motor is used in traction system?

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57 views 0 answers

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

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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asked Mar 15, 2018 by anonymous

What is the RPM of a DC motor?

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asked Mar 15, 2018 by anonymous

What is the back EMF of a dc motor?

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asked Mar 10, 2018 by anonymous

What is a servo motor and how does it work?

Last answer: It is a simple electrical motor that is operated by AC or DC signal in order to provide a precise angular motion for a given electrical signal.

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80 views 1 answer

asked Dec 16, 2017 by anonymous

What is the rotor of a motor?

Last answer: Rotor is the rotating or moving part in motor and generator.

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115 views 1 answer

asked Aug 18, 2019 by anonymous

What would happen if a DC motor was supplied with AC ?

Last answer: With three phase induction motor, humming and not rotate, but if single phase universal motor like air blower, home mixture, motor run on constant speed..speed variation not possible...

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91 views 2 answers

asked Mar 20, 2018 by anonymous

What will happen if the back e.m.f. of a D.C. motor vanishes suddenly?

Last answer: The armature may burn if the back e.m.f. of a D.C. motor vanishes suddenly.

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381 views 1 answer

asked Mar 15, 2018 by anonymous

What can cause high amperage on a motor?

Last answer: High amperage can result in a motor when the amount of load increases. when load increases , it reduces the rotor speed which increases the slip at constant synchronous speed ... , as a result more current shall have been drawn to maintain the additional load.

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asked Aug 28, 2019 by anonymous

What is the difference between Generator and Motor?

Last answer: If a rotating machine delivers a power as output it is called generator. If power required to rotate a machine it is called motor.

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98 views 3 answers

asked 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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773 views 1 answer

asked Mar 17, 2018 by anonymous

What is the definition of induction motor?

Last answer: its working on magnetic base made by coils and its work with 1 phase or 3 phase ac or dc supply

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asked Mar 17, 2018 by anonymous

What is the function of induction motor?

Last answer: while you give supply to motor its motor run on magnet base

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asked Mar 16, 2018 by PRAGATI

What is wire in motor

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asked Mar 15, 2018 by anonymous

What is the principle of synchronous motor?

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asked Mar 15, 2018 by anonymous

What is the use of synchronous motor?

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asked Mar 15, 2018 by anonymous

What is the principle of AC motor?

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asked Mar 15, 2018 by anonymous

What is the principle of DC motor?

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asked Mar 15, 2018 by anonymous

What is back EMF of synchronous motor?

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asked Mar 15, 2018 by anonymous

What is the back EMF of the motor?

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asked Mar 10, 2018 by anonymous

What is an electric motor drive?

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asked Mar 3, 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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128 views 1 answer

asked Dec 16, 2017 by anonymous

What is the use of an electric motor?

Last answer: Electrical motors are use for converting electrical energy to mechanical energy. It may be use in fans, pumps, washing machine, cranes, trains, factories, industries etc.

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72 views 1 answer

asked Aug 9, 2017 by anonymous

what is AC motor?

AC motor

Last answer: AC motor AC motor have two types one is Induction motor and second is synchronous motor. Induction motor have two types one is single phase induction motor and second is three phase ... self starting motor so using external motor or we have to start it as induction motor.

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asked Aug 6, 2017 by anonymous

what is the difference between synchronous and asynchronous motor?

Last answer: Asynchronous motors and syncrouns motor are called as dc machines. and also syncrouns motor called as induction motor. Asynonymous motor as are rotates with constant speed we not able to operate . ... It is able to operate. These are a small difference between syncrouns and asynchronous motors.

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237 views 2 answers

asked Aug 18, 2019 by anonymous

What will happen if the induction motor runs at synchronous speed ?

Last answer: Since there is always slip present in rotor it cannot run at synchronous speed no current will be developed hence no torque will developed

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76 views 3 answers

asked Mar 20, 2018 by anonymous

Centrifugal switch disconnects the auxiliary winding of the motor at about what percent of synchronous speed?

Last answer: Centrifugal switch disconnects the auxiliary winding of the motor at about 70 to 80 percent of synchronous speed.

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141 views 1 answer

asked Mar 18, 2018 by anonymous

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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279 views 1 answer

asked Mar 15, 2018 by anonymous

What are the advantages of DC series motor?

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asked Mar 15, 2018 by anonymous

What will happen if you increase the current in the motor?

Last answer: Increasing current means increasing frequency of the motor because current is directly proportional to rotations of the motor rotor

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144 views 1 answer

asked Mar 15, 2018 by anonymous

What are the parts of AC motor?

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asked Dec 16, 2017 by anonymous

What are the speed control methods of dc motor?

Last answer: Field control of DC motor Armature control of DC motor

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150 views 2 answers

asked Sep 2, 2019 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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128 views 6 answers

asked May 8, 2018 by anonymous

In a double squirrel cage induction motor, good starting torque is produced as

In a double squirrel cage induction motor, good starting torque is produced as (A) Large current flows through the outer high resistance winding. (B) Large current flows through the inner high resistance winding. (C) Small current flows through the outer high resistance winding. (D) Large current flows through the inner low resistance winding.

Last answer: In a double squirrel cage induction motor, good starting torque is produced as Large current flows through the outer high resistance winding.

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92 views 1 answer

asked May 3, 2018 by anonymous

The rotor impedance of a slip ring induction motor is (0.1 + j0.6)Ohm/ ph . The resistance/ph to be inserted

The rotor impedance of a slip ring induction motor is (0.1 + j0.6)Ohm/ ph . The resistance/ph to be inserted into rotor to get maximum torque at starting should be

Last answer: The rotor impedance of a slip ring induction motor is (0.1 + j0.6)Ohm/ ph . The resistance/ph to be inserted into rotor to get maximum torque at starting should be 0.5 Ohm

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125 views 1 answer

asked May 3, 2018 by anonymous

A 200 V dc shunt motor is running at 1000 rpm and drawing a current of 10 A. Its armature winding resistance

A 200 V dc shunt motor is running at 1000 rpm and drawing a current of 10 A. Its armature winding resistance is 2 Ohm. It. is braked by plugging. The resistance to be connected in series with armature to restrict armature current to 10 A, is

Last answer: A 200 V dc shunt motor is running at 1000 rpm and drawing a current of 10 A. Its armature winding resistance is 2 Ohm. It. is braked by plugging. The resistance to be connected in series with armature to restrict armature current to 10 A, is 36 Ohm

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175 views 1 answer

asked May 1, 2018 by anonymous

The speed of a three-phase induction motor is controlled by variable voltage variable frequency control

The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque (1) Decreases (2) Increases (3) Remains constant (4) None of the above

Last answer: The speed of a three-phase induction motor is controlled by variable voltage variable frequency control (i.e. keeping V/f constant). As the frequency is reduced, the slip at maximum torque Increases

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119 views 1 answer

asked Apr 30, 2018 by anonymous

A separately excited dc motor operating in first quadrant is fed from 3-phase semi -converter free -wheeling

A separately excited dc motor operating in first quadrant is fed from 3-phase semi -converter free -wheeling diode is open circuited, then the motor : (A) can be operated in first quadrant (B) can be operated in first & second quadrants (C) can be operated in first & fourth quadrants (D) cannot be operated

Last answer: A separately excited dc motor operating in first quadrant is fed from 3-phase semi -converter free -wheeling diode is open circuited, then the motor : can be operated in first & fourth quadrants

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170 views 1 answer

asked Apr 29, 2018 by anonymous

Torque developed by a three-phase, 400V, induction motor is 100 N -m. If the applied voltage is reduced to

Torque developed by a three-phase, 400V, induction motor is 100 N -m. If the applied voltage is reduced to 200-V, the d'veloped torque will be

Last answer: Torque developed by a three-phase, 400V, induction motor is 100 N -m. If the applied voltage is reduced to 200-V, the d'veloped torque will be 25 N -m

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92 views 1 answer

asked Apr 29, 2018 by anonymous

A 400 V, 50 Hz three-phase induction motor rotates at 1440 rpm on full -load. The motor is wound for

Last answer: A 400 V, 50 Hz three-phase induction motor rotates at 1440 rpm on full -load. The motor is wound for 4 poles

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117 views 1 answer

asked Apr 29, 2018 by anonymous

The function of a brush and commutator arrangement in a dc motor is to

The function of a brush and commutator arrangement in a dc motor is to (1) produce unidirectional torque (2) produce unidirectional current in the armature (3) help in changing the direction of rotation of the armature (4) reduce sparking

Last answer: The function of a brush and commutator arrangement in a dc motor is to produce unidirectional torque

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1.4k views 1 answer

asked Apr 29, 2018 by anonymous

In a DC motor, it is important to place the brushes along ______

In a DC motor, it is important to place the brushes along ______ A) Magnetic Neutral Axis B) Normal Geometric Axis C) Nominal Geometric Axis D) None of these

Last answer: In a DC motor, it is important to place the brushes along Magnetic Neutral Axis

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65 views 1 answer

asked Apr 29, 2018 by anonymous

In a single-phase induction motor, the operating direction is determined by the ________

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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78 views 1 answer

asked Apr 28, 2018 by anonymous

In a single-phase induction motor when the rotor is stationary and voltage is applied to the stator, then

In a single-phase induction motor when the rotor is stationary and voltage is applied to the stator, then (A) the flux is constant (B) the flux first decreases and then increases in the same direction (C) the flux increases and decreases in the opposite direction with the same magnitude (D) current flows through the rotor

Last answer: In a single-phase induction motor when the rotor is stationary and voltage is applied to the stator, then the flux first decreases and then increases in the same direction

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75 views 1 answer

asked Apr 28, 2018 by anonymous

The effect of increasing load on a synchronous motor running with normal excitation is

The effect of increasing load on a synchronous motor running with normal excitation is (A) Increase both its Ia and power factor. (B) Decrease Ia, but increase power factor. (C) Increase Ia, but decrease power factor (D) Decrease both Ia and power factor.

Last answer: The effect of increasing load on a synchronous motor running with normal excitation is Increase Ia, but decrease power factor

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401 views 1 answer

asked Apr 28, 2018 by anonymous

An 8-pole, 50Hz, three-phase induction motor is running at 705rpm and has a rotor copper loss of 5kW.

An 8-pole, 50Hz, three-phase induction motor is running at 705rpm and has a rotor copper loss of 5kW. Its rotor input is (A) 5.06 kW (B) 0.3 kW (C) 100 kW (D) 83.33 kW

Last answer: An 8-pole, 50Hz, three-phase induction motor is running at 705rpm and has a rotor copper loss of 5kW. Its rotor input is 83.33 kW

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129 views 1 answer

asked Apr 28, 2018 by anonymous

In a 3-phase slip-ring induction motor, the slip at some speed is 0.05. The speed is reduced by inserting an

In a 3-phase slip-ring induction motor, the slip at some speed is 0.05. The speed is reduced by inserting an external resistance in the rotor circuit and the slip is 0.15. If the rotor winding resistance per phase is 0.2 Ω, the external resistance is (A) 0.2 Ω (B) 0.3 Ω (C) 0.4 Ω (D) 0.5 Ω

Last answer: In a 3-phase slip-ring induction motor, the slip at some speed is 0.05. The speed is reduced by inserting an external resistance in the rotor circuit and the slip is 0.15. If the rotor winding resistance per phase is 0.2 Ω, the external resistance is 0.3 Ω

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103 views 1 answer

anonymous · Answer 1 · 2018-03-12T21:11:53+0000

answered Mar 12, 2018 by anonymous

Motors used to run conveyor belts.

What is a conveyor motor?

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