Recent questions tagged torque

asked Apr 24, 2020 by anonymous

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asked Sep 6, 2018 by anonymous

Describe spring control method of producing controlling torque in measuring instrument. Write any two properties required for spring material.

Last answer: A)Spring control method: As shown in the figure, the inner ends of the both springs are attahced to the spindle, while outer end of upper spring is attached to the lever and outer ... of spring material: 1.Non Magnetic material 2.Low specific resistance 3.Low temperature coefficient of resistance

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517 views 1 answer

asked Sep 6, 2018 by anonymous

Name the different torque and their function in measuring instrument.

Last answer: List of torques in analog instruments: 1. Deflecting torque 2. Controlling / restraining torque. 3. Damping torque. 1. Deflecting torque: - To create deflection of pointer ... . - Bring the pointer to standstill quickly. - To minimize oscillations about final position.

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50 views 1 answer

asked Sep 6, 2018 by anonymous

State the function of controlling torque in electrical measuring instrument.

Last answer: Function of controlling torque 1. The function is to opposes the deflection force and increases with the increase in the deflection of the moving system, to limit its movement. 2. and brought ... set a position where the two opposing forces i.e. deflection and controlling forces are equal.

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55 views 1 answer

asked Sep 6, 2018 by anonymous

List the different methods to produce damping torque.

Last answer: Methods of providing damping torque in indicating type instruments: 1) Air friction damping. 2) Fluid friction damping. 3) Eddy current damping.

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63 views 1 answer

asked Sep 6, 2018 by anonymous

State the function of controlling torque. Write two types of it.

Last answer: Function of Controlling Torque: To restrict the motion of pointer / spindle and stop the pointer at the relevant position to get correct reading. To bring back pointer to zero ... measurement is removed. Types of Controlling Torque: 1. Spring control method 2.Gravity control method

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96 views 1 answer

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 Apr 30, 2018 by anonymous

Ideally, the damping torque should be

Ideally, the damping torque should be (1) Proportional to velocity of the moving system and operating current. (2) Proportional to the velocity of the moving system but independent of operating current. (3) Independent of the velocity of the moving system and proportional to the operating current. (4) Independent of the velocity of the moving system and operating current.

Last answer: Ideally, the damping torque should be Proportional to the velocity of the moving system but independent of operating current.

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490 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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87 views 1 answer

asked Apr 28, 2018 by anonymous

Torque angle for the synchronous machine is the angle between

Torque angle for the synchronous machine is the angle between (A) stator magnetic field and rotor magnetic field (B) stator magnetic field and net magnetic field in the air gap (C) rotor magnetic field and net magnetic field in the air gap (D) excitation voltage and impedance voltage drop

Last answer: Torque angle for the synchronous machine is the angle between rotor magnetic field and net magnetic field in the air gap

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71 views 1 answer

asked Apr 28, 2018 by anonymous

The meter which does not have any component in it to provide control torque is

The meter which does not have any component in it to provide control torque is (A) Electrodynamometer for current measurement (B) Electrodynamometer for voltage measurement (C) Electrodynamometer for power measurement. (D) Electrodynamometer for power factor measurement.

Last answer: The meter which does not have any component in it to provide control torque is Electrodynamometer for power factor measurement.

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118 views 1 answer

asked Apr 28, 2018 by anonymous

The torque developed by any 3-phase induction motor at 0.8 p.u. slip is

The torque developed by any 3-phase induction motor at 0.8 p.u. slip is (A) Full-load torque (B) unstable torque (C) starting torque (D) break down

Last answer: The torque developed by any 3-phase induction motor at 0.8 p.u. slip is unstable torque

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2.9k views 1 answer

asked Apr 26, 2018 by anonymous

The torque produced in wattmeter is proportional to

Last answer: A

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594 views 2 answers

asked Mar 26, 2018 by anonymous

The shaft torque of a d.c. motor is less than its armature ...

The shaft torque of a d.c. motor is less than its armature torque because of .......... losses.

Last answer: The shaft torque of a d.c. motor is less than its armature torque because of rotational losses.

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175 views 1 answer

asked Mar 26, 2018 by anonymous

The maximum torque of d.c. motors is limited by?

Last answer: The maximum torque of d.c. motors is limited by commutation.

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291 views 1 answer

asked Mar 21, 2018 by anonymous

In a meggar controlling torque is provided by?

Last answer: In a meggar controlling torque is provided by coil.

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540 views 1 answer

asked Mar 21, 2018 by anonymous

In a portable instrument, the controlling torque is provided by?

Last answer: In a portable instrument, the controlling torque is provided by spring.

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104 views 1 answer