In D.C. generators, the brushes on commutator remain in contact with conductors which?

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In D.C. generators, the brushes on commutator remain in contact with conductors which?

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asked Mar 20, 2018 by anonymous

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asked Jun 22, 2021 by itszee

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asked Jun 21, 2021 by itszee

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asked Jun 21, 2021 by itszee

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asked Jun 21, 2021 by itszee

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asked Jun 21, 2021 by itszee

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To avoid formation of grooves in the commutator of a D.C. machine?

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asked Mar 21, 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

If brushes of a D.C. generator are moved in order to bring these brushes in magnetic neutral axis, there will be?

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asked Mar 21, 2018 by anonymous

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Generators for peak load plants are usually designed for maximum efficiency at?

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The number of brushes in a commutator depends on?

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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

Voltage generated by most AC generators is fed from the machine to the bus by means of ____________. A. brushes on a commutator B. brushes on slip rings C. slip rings on a commutator D. direct connections from the stator

Voltage generated by most AC generators is fed from the machine to the bus by means of ____________. A. brushes on a commutator B. brushes on slip rings C. slip rings on a commutator D. direct connections from the stator
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asked Jan 4 by itszee

Which of the following precautions should you take when securing propulsion generators and motors for an extended period of time? A. Disconnect the brush pigtails from their contacts and circulate air through the units. B. Disconnect the brush pigtails from their contacts and discharge carbon dioxide into the units to keep them dry. C. Lift the brushes from commutator collector rings and use the built-in heater to prevent moisture accumulation. D. Lift the brushes from commutator collector rings and circulate cool dry air through the units.

Which of the following precautions should you take when securing propulsion generators and motors for an extended period of time? A. Disconnect the brush pigtails from their contacts and circulate air ... Lift the brushes from commutator collector rings and circulate cool dry air through the units.
Last Answer : Answer: C

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asked Jan 4 by itszee

The commutator segments are connected to the armature conductors by means of?

Last Answer : The commutator segments are connected to the armature conductors by means of copper lugs.

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asked Mar 20, 2018 by anonymous

State the function of following parts of DC motor : i) Yoke ii) Poles iii) Field winding iv) Commutator.

State the function of following parts of DC motor : i) Yoke ii) Poles iii) Field winding iv) Commutator.
Last Answer : Function : i) Yoke: The yoke serves the following two purposes. i) It supports the other components such as poles and provides mechanical protection for whole machine. ii) It forms a part of ... one pole to another and thus to help the motor to develop a continuous and unidirectional torque

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asked Jul 30, 2019 by anonymous

State the function of commutator in DC generator and name the material used for commutator.

State the function of commutator in DC generator and name the material used for commutator.
Last Answer : Function of Commutator: Commutator converts AC induced in armature winding into DC for external load. Material: i) Commutator segments are made up of Copper. ii) Commutator segments are insulated from each other by Mica.

256 views 1 answer

asked Jul 27, 2019 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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asked Apr 29, 2018 by anonymous

Sparking at the commutator of a D.C. motor may result in?

Last Answer : Sparking at the commutator of a D.C. motor may result in damage to commutator segments, damage to commutator insulation, increased power consumption.

228 views 1 answer

asked Mar 20, 2018 by anonymous

The critical resistance of the D.C. generator is the resistance of?

Last Answer : The critical resistance of the D.C. generator is the resistance of field.

554 views 1 answer

asked Mar 21, 2018 by anonymous

If residual magnetism is present in a D.C. generator, the induced e.m.f. at zero speed will be?

If residual magnetism is present in a D.C. generator, the induced e.m.f. at zero speed will be?
Last Answer : If residual magnetism is present in a D.C. generator, the induced e.m.f. at zero speed will be zero.

277 views 1 answer

asked Mar 21, 2018 by anonymous