In lap winding, the number of brushes is always?

A 36 slot, 4 -pole, dc machine has a simplex lap winding with two conductors per slot. The back pitch and front pitch adopted could be respectively
Last Answer : A 36 slot, 4 -pole, dc machine has a simplex lap winding with two conductors per slot. The back pitch and front pitch adopted could be respectively 19,17

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asked May 3, 2018 by anonymous

The rapid wear of brushes takes place due to?

Last Answer : The rapid wear of brushes takes place due to abrasion from dust, excessive spring pressure, rough commutator bars, high mica insulation between com-mutation bars.

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asked Mar 21, 2018 by anonymous

Armature coil is short circuited by brushes when it lies?

Last Answer : Armature coil is short circuited by brushes when it lies along neutral axis.

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asked Mar 21, 2018 by anonymous

The material for commutator brushes is generally?

Last Answer : The material for commutator brushes is generally carbon.

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asked Mar 20, 2018 by anonymous

Brushes of D.C. machines are made of?

Last Answer : Brushes of D.C. machines are made of carbon.

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asked Mar 20, 2018 by anonymous

Copper brushes in D.C. machine are used?

Last Answer : Copper brushes in D.C. machine are used where low voltage and high currents are involved.

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asked Mar 20, 2018 by anonymous

In case of D.C. machine winding, number of commutator segments is equal to?

Last Answer : In case of D.C. machine winding, number of commutator segments is equal to number of armature coils.

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asked Mar 20, 2018 by anonymous

Wave winding is composed of?

Last Answer : Wave winding is composed of that even number which is exact multiple of poles + 2.

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asked Mar 21, 2018 by anonymous

The resistance of armature winding depends on?

Last Answer : The resistance of armature winding depends on length of conductor, cross-sectional area of the conductor, number of conductors.

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asked Mar 20, 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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asked Apr 29, 2018 by anonymous

Brushes of DC machine are made up of ?

Brushes of DC machine are made up of ?
Last Answer : Brushes of DC machine are made up of carbon.

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asked Mar 3, 2018 by anonymous

does the high voltage side of Transformer winding have more number of turns?

Last Answer : yes High Voltage side of Transformer winding have more number of turns. and low voltage side of Transformer winding have less number of turns.

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asked Sep 30, 2017 by anonymous

State advantages of short pitch winding over full pitch winding in alternators.

State advantages of short pitch winding over full pitch winding in alternators.
Last Answer : Advantages of Short Pitch Winding over Full Pitch Winding in Alternators: 1) Short pitching reduces the amount of copper needed for end connection when compared with full pitched coil. 2) They ... reduced, thereby increasing the efficiency. 4) The power quality of generated emf is improved.

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asked May 7, 2020 by anonymous

What is armature winding?

Last Answer : It is the wire wound around a aluminium metal it is found commonly in transformers or motors

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asked Jul 27, 2019 by anonymous

Damper winding in a synchronous motor

Damper winding in a synchronous motor
Last Answer : Damper winding in a synchronous motor Serves to start the motor.

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asked May 8, 2018 by anonymous

A certain transformer has 200 turns in the primary winding, 50 turns in the secondary winding and 120 volts

A certain transformer has 200 turns in the primary winding, 50 turns in the secondary winding and 120 volts applied to the primary. What is the voltage across the secondary? (A) 30 Volts (B) 480 Volts (C) 120 Volts (D) 60 Volts
Last Answer : A certain transformer has 200 turns in the primary winding, 50 turns in the secondary winding and 120 volts applied to the primary. What is the voltage across the secondary? (A) 30 Volts (B) 480 Volts (C) 120 Volts (D) 60 Volts

223 views 1 answer

asked May 8, 2018 by anonymous

A _________ is used to measure the stator % winding temperature of the generator.

A _________ is used to measure the stator % winding temperature of the generator. (A) Thermocouple (B) Pyrometer (C) Resistance thermometer (D) Thermometer
Last Answer : A Resistance thermometer is used to measure the stator % winding temperature of the generator.

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asked May 8, 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

329 views 1 answer

asked May 3, 2018 by anonymous

Damper winding is provided in 3 phase synchronous motors to :

Damper winding is provided in 3 phase synchronous motors to :
Last Answer : Damper winding is provided in 3 phase synchronous motors to : provide starting torque and prevent hunting

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asked Apr 29, 2018 by anonymous

Aluminium is not used as winding wire for the armature of a dc machine because

Aluminium is not used as winding wire for the armature of a dc machine because (1) aluminium has low resistivity (2) a large winding space is taken by aluminium conductors and creates ... ) the thermal conductivity of aluminium is low (4) aluminium has low conductivity as compared to copper
Last Answer : Aluminium is not used as winding wire for the armature of a dc machine because (2) a large winding space is taken by aluminium conductors and creates jointing problems (3) the thermal conductivity of aluminium is low (4) aluminium has low conductivity as compared to copper

621 views 1 answer

asked Apr 29, 2018 by anonymous

In D.C. machines fractional pitch winding is used?

Last Answer : In D.C. machines fractional pitch winding is used to reduce the sparking.

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asked Mar 20, 2018 by anonymous

The starting winding of a single-phase motor is placed in?

Last Answer : The starting winding of a single-phase motor is placed in stator.

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asked Mar 20, 2018 by anonymous

If starting winding of a single-phase induction motor is left in the circuit, it will?

Last Answer : If starting winding of a single-phase induction motor is left in the circuit, it will draw excessive current and overheat.

234 views 1 answer

asked Mar 20, 2018 by anonymous

Starting winding of a single phase motor of a refrigerator is disconnected from the circuit by means of a?

Last Answer : Starting winding of a single phase motor of a refrigerator is disconnected from the circuit by means of a magnetic relay.

215 views 1 answer

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.

222 views 1 answer

asked Mar 20, 2018 by anonymous

The purpose of stator winding in the compensated repulsion motor is to?

Last Answer : The purpose of stator winding in the compensated repulsion motor is to improve power factor and provide better speed regulation.

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asked Mar 20, 2018 by anonymous

In split phase motor main winding is of?

Last Answer : In split phase motor main winding is of thick wire placed at the bottom of the slots.

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asked Mar 20, 2018 by anonymous

In A.C. series motor compensating winding is employed to?

Last Answer : In A.C. series motor compensating winding is employed to reduce sparking at the brushes.

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asked Mar 20, 2018 by anonymous

In split-phase motor auxiliary winding is of?

Last Answer : In split-phase motor auxiliary winding is of thin wire placed at the top of the slots.

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asked Mar 20, 2018 by anonymous

The running winding of a single phase motor on testing with meggar is found to be ground...

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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asked Mar 20, 2018 by anonymous

A centrifugal switch is used to disconnect starting winding when motor has?

Last Answer : A centrifugal switch is used to disconnect starting winding when motor has picked up about 50 to 70 per cent of rated speed.

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asked Mar 20, 2018 by anonymous

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°.

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asked Mar 20, 2018 by anonymous

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.

710 views 1 answer

asked Mar 20, 2018 by anonymous

In a split phase motor, the running winding should have?

Last Answer : In a split phase motor, the running winding should have low resistance and high inductance.

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asked Mar 20, 2018 by anonymous

If the field winding of an unloaded salient pole synchronous motor is open circuited, the motor will?

Last Answer : If the field winding of an unloaded salient pole synchronous motor is open circuited, the motor will stop.

257 views 1 answer

asked Mar 20, 2018 by anonymous

The short circuit in any winding of the transformer is the result of?

Last Answer : The short circuit in any winding of the transformer is the result of impulse voltage.

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asked Mar 20, 2018 by anonymous

Primary winding of a transformer?

Last Answer : Primary winding of a transformer could either be a low voltage or high voltage winding.

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asked Mar 19, 2018 by anonymous

Which type of winding is used in 3 phase shell-type transformer ?

Last Answer : Sandwich type winding is used in 3 phase shell-type transformer.

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asked Mar 19, 2018 by anonymous

The damping winding in synchronous motor is generally used to?

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.

157 views 1 answer

asked Mar 18, 2018 by anonymous

In synchronous motor, does the winding losses vary with load?

In synchronous motor, does the winding losses vary with load?
Last Answer : No, in the synchronous motor the winding losses do not vary with load.

512 views 1 answer

asked Mar 3, 2018 by anonymous

In lap winding, the number of brushes is always (a) double the number of poles (b) same as the number of poles (c) half the number of poles (d) two

In lap winding, the number of brushes is always (a) double the number of poles (b) same as the number of poles (c) half the number of poles (d) two
Last Answer : Ans: b

9 views 1 answer

asked Jun 21, 2021 by itszee

What number is your Willpower?

What number is your Willpower?
Last Answer : 10 but then I cheated so I don’t know… but I’m being honest about it so 10 or am I lying again… so definitely between 1 and 10

2 views 1 answer

asked Feb 27 by anonymous

What is the choice of size and number of generator units in interconnected power system?

What is the choice of size and number of generator units in interconnected power system?
Last Answer : Choice of Size and Number of Generating Units: 1. The size/rating and number of generating units in such way that they approximately match with the load curve as closely as possible. 2. In ... , if power plant is connected to grid system then generating unit of higher capacity can be installed.

111 views 1 answer

asked Sep 7, 2018 by anonymous

The number of loop equations required to completely analysing a network comprising of 8 independent

The number of loop equations required to completely analysing a network comprising of 8 independent branches and 6 nodes including the reference node shall be A) 3 B) 2 C) 4 D) 5
Last Answer : The number of loop equations required to completely analysing a network comprising of 8 independent branches and 6 nodes including the reference node shall be 3

158 views 1 answer

asked Jun 18, 2018 by anonymous

A connected graph has ‘5’ number of branches and ‘4’ number of nodes. It's rank is

A connected graph has ‘5’ number of branches and ‘4’ number of nodes. It's rank is A) 1 B) 2 C) 3 D) 4
Last Answer : A connected graph has ‘5’ number of branches and ‘4’ number of nodes. It's rank is 3

206 views 1 answer

asked Jun 18, 2018 by anonymous

Then number of T-states of the instruction STA in 8085 microprocessor is

Then number of T-states of the instruction STA in 8085 microprocessor is A) 10 B) 12 C) 13 D) 16
Last Answer : Then number of T-states of the instruction STA in 8085 microprocessor is 13

164 views 1 answer

asked Jun 18, 2018 by anonymous

anonymous · Answer 1 · 2018-03-20T22:34:19+0000

In lap winding, the number of brushes is always same as the number of poles.

In lap winding, the number of brushes is always?

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