Dynamometer type moving coil instruments are provided with _____.

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1 Answer

Answer :

Dynamometer type moving coil instruments are provided with pneumatic damping

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Which of the following instruments have least torque/weight ratio: a) Dynamometer type b) PMMC c) Attraction type moving iron d) Repulsion type moving iron

Description : Which of the following instruments have least torque/weight ratio: a) Dynamometer type b) PMMC c) Attraction type moving iron d) Repulsion type moving iron

Last Answer : Ans: A

Moving coil in dynamometer wattmeter connected a) In series with fixed coil b) Across supply c) In series with load d) Across load

Description : Moving coil in dynamometer wattmeter connected a) In series with fixed coil b) Across supply c) In series with load d) Across load

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Description :  Moving coil in dynamometer wattmeter connected : - a) in series with fixed coil b) across supply c) in series with load d) across load

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The resistance in the circuit of the moving coil of a dynamometer wattmeter should be?

Last Answer : The resistance in the circuit of the moving coil of a dynamometer wattmeter should be high.

State the material used for moving coil and former for PMMC instruments.

Description : State the material used for moving coil and former for PMMC instruments. 

Last Answer : Material Used for Moving Coil and Former for PMMC Instruments:  Material used for moving coil: Copper  Material used for Former: Aluminium

In dynamometer type of wattmeter, which of the coil is split up into two parts?

Description :  In dynamometer type of wattmeter, which of the coil is split up into two parts?

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Description : The pressure coil of a dynamometer type wattmeter is  A) Highly inductive B) Highly resistive C) Purely resistive D) Purely inductive

Last Answer : highly resistive

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Description : Which of the instruments listed is used to check insulation resistance? A. Magneto B. Megohmmeter C. Dynamometer D. Rheostat

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The potential coil of a single phase dynamometer wattmeter has 4840 Ohm resistance. Voltage across the load is

Description : The potential coil of a single phase dynamometer wattmeter has 4840 Ohm resistance. Voltage across the load is 220 V. With the potential coil connected on the load side, the meter indicates 100 W. Approximate percentage error due to wattmeter connection is (A) 11% (B) 9% (C) 1.1% (D) 3%

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Current range extension in moving coil instruments can be achieved by placing a ___ in shunt with the instrument.

Description : Current range extension in moving coil instruments can be achieved by placing a ___ in shunt with the instrument.

Last Answer : low resistance resistor

Permanent magnet moving coil instruments are used for

Description : Permanent magnet moving coil instruments are used for

Last Answer : PMME are mostly used for measuring voltage and current.

In a dynamo-meter type of moving coil instrument a swamping resistance is provided in order to:

Last Answer : In a dynamo-meter type of moving coil instrument a swamping resistance is provided inorder to: Provide equal time constant for moving coil and fixed coil, when used for ac measurement

In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at?

Last Answer : In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at 120°.

To limit the current flow through a DC voltmeter to as low a value as possible, the moving coil circuit is provided with a/an _____________. A. high series resistance B. high parallel resistance C. series inductor D. external shunt

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Last Answer : Answer: A

In moving coil meters, damping is provided by

Last Answer : In moving coil meters, damping is provided by eddy current disk.

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Description : Draw and explain the circuit diagram for measurement of single phase power using dynamometer type wattmeter. 

Last Answer : Circuit diagram for measurement of single phase power using dynamometer type wattmeter: Explanation: It consists of two stationary coils, called current coils and one moving coil, called voltage or ... i.e. power. The meter can be calibrated directly to indicate the power in watts. 

State the effects of errors in dynamometer type wattmeter due to i) pc- inductance ii) pc- capacitance iii) mutual inductance iv) Connection.

Description : State the effects of errors in dynamometer type wattmeter due to i) pc- inductance ii) pc- capacitance iii) mutual inductance iv) Connection.

Last Answer : Errors in wattmeter:  i) pc - inductance: Pressure coil inductance causes wattmeter to read more power than actual .  ii) pc-capacitance: The wattmeter reads less power.  iii) ... iv) Connection: In uncompensated wattmeter , the reading of wattmeter includes the powerloss in coils. 

State any four errors that occur in dynamometer type wattmeter

Description : State any four errors that occur in dynamometer type wattmeter

Last Answer : Errors that occur in dynamometer type wattmeter: 1. Errors due to method of connection. 2. Error due to pressure coil inductance. 3. Error due to pressure coil Capacitance. 4. Error due to mutual ... Error due to eddy currents. 7. Temperature error. 8. Error due to vibration of moving system

With a neat sketch explain working of 1 phase dynamometer type power factor meter.

Description : With a neat sketch explain working of 1 phase dynamometer type power factor meter.

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With neat diagram explain constructional details of dynamometer type wattmeter.

Description : With neat diagram explain constructional details of dynamometer type wattmeter.

Last Answer : Working Principle of Wattmeter: It consists of two stationary coils, called current coils and one moving coil, called voltage or potential coil. The moving coil is mounted on the spindle, in the gap ... experiences a force and tends to move in the direction as per Fleming's left hand rule. 

Consider the following statements with regard to Moving Iron (MI) instruments : 1. These instruments ...

Description : Consider the following statements with regard to Moving Iron (MI) instruments :  1. These instruments possess high operating torque.  2. These instruments can be used in ac and dc circuits.  3. Power consumption in these instruments ... and 2 only (b) 1 and 3 only (c) 2 and 3 only (d) 1, 2 and 3

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In moving iron instruments, eddy current damping cannot be used as

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Last Answer : In moving iron instruments, eddy current damping cannot be used as The introduction of a permanent magnet required for eddy current damping would distort the existing weak operating magnetic field

Moving iron instruments can be used for measuring

Description : Moving iron instruments can be used for measuring (1) Direct currents and voltages (2) Radio frequency currents (3) A.C currents and voltages (4) Both (a) and (c)

Last Answer : moving iron instruments areused to measure A.C curents &  voltages

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Which of the listed instruments can be best used to locate a grounded field coil in a synchronous motor? A. Frequency meter B. Megohmmeter C. Voltmeter D. Multimeter

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Name the material used for :- (i) Moving coil (ii) Permanent magnet in PMMC instrument.

Description : Name the material used for :- (i) Moving coil (ii) Permanent magnet in PMMC instrument.

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Description : A moving coil instrument of resistance 5 Ohm requires a potential difference of 75 mV to give a full scale deflection. The value of shunt resistance needed to give a full scale deflection at 30 A is

Last Answer : A moving coil instrument of resistance 5 Ohm requires a potential difference of 75 mV to give a full scale deflection. The value of shunt resistance needed to give a full scale deflection at 30 A is 2.5 milliOhm

The coil of a moving coil meter is would on

Last Answer : The coil of a moving coil meter is would on An aluminium frame.

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Dynamometer type instrument can be used for

Description : Dynamometer type instrument can be used for

Last Answer : both dc and ac works

power of absorbing type hydraulic dynamometer varies as a) cube of rpm b) fifth power of the diameter c) none of the above d) both (a) and (b)

Description : power of absorbing type hydraulic dynamometer varies as a) cube of rpm b) fifth power of the diameter c) none of the above d) both (a) and (b)

Last Answer : d) both (a) and (b)

In an energymeter which coil carries the current proportional to supply voltage _____.

Description :  In an energymeter which coil carries the current proportional to supply voltage _____. 

Last Answer :  In an energymeter which coil carries the current proportional to supply voltage Pressure coil. 

The series magnet of a single phase Energy meter consists of coil of _____.

Last Answer : The series magnet of a single phase Energy meter consists of coil of thick wire of few turns.

In majority of instruments damping is provided by?

Last Answer : In the majority of instruments, damping is provided by eddy currents.

What does a dynamometer measure?

Description : What does a dynamometer measure?

Last Answer : A dynamometer is used to measure force, torque or power of a engine. A dynamometer also can measure the torque and power needed to power a given driven machine.

Do I need any special training to use a dynamometer?

Description : Do I need any special training to use a dynamometer?

Last Answer : Yoy may be able to figure it out but I would not trust it. I would begin looking online or asking someone who knows about dynamometers for help. If you can do these two options you might just need to as your boss for assistance before next week.

Soil strength is determined by (a) Penetrometer (b) Micrometer (c) Hydrometer (d) Dynamometer

Description : Soil strength is determined by (a) Penetrometer (b) Micrometer (c) Hydrometer (d) Dynamometer

Last Answer : (a) Penetrometer

A dynamometer instrument is mainly used as a/an

Description : A dynamometer instrument is mainly used as a/an

Last Answer : wattmeter

Where can we used the dynamometer?

Description : Where can we used the dynamometer?

Last Answer : dc and ac

For a dynamometer to be able to measure high current, a ___ should be used.

Description : For a dynamometer to be able to measure high current, a ___ should be used.

Last Answer : current transformer

Soil strength is determined by: A. penetrometer B. micrometer C. hydrometer D. dynamometer

Description : Soil strength is determined by: A. penetrometer B. micrometer C. hydrometer D. dynamometer

Last Answer : D. dynamometer

Which one is a transmission dynamometer a) Torsion dynamometer b) Froues hydraulic dynamometer c) Belr dynamometer d) Proney brake dynamometer

Description : Which one is a transmission dynamometer a) Torsion dynamometer b) Froues hydraulic dynamometer c) Belr dynamometer d) Proney brake dynamometer

Last Answer : a) Torsion dynamometer

Explain the working principle of the following dynamometers with suitable sketches, if necessary: (i) Hydraulic Dynamometer. (ii) Eddy Current Dynamometer.

Description : Explain the working principle of the following dynamometers with suitable sketches, if necessary: (i) Hydraulic Dynamometer. (ii) Eddy Current Dynamometer.

Last Answer : (i) Hydraulic Dynamometer: In principle, hydraulic dynamometer construction is similar to that of a fluid flywheel. Hydraulic dynamometer consists of an impeller or inner rotating member coupled to the output shaft ... Eddy current oppose the rotor motion thus loading the engine.

Describe the working of electrical dynamometer

Description : Describe the working of electrical dynamometer

Last Answer : Electric Dynamometer:- These may be either the i) Swinging field type  ii) Eddy current type. Working principle of eddy current dynamometer:  Figure: Working principle of Eddy ... the help of a movement arm. The load is controlled by regulating the current in the electromagnets. 

A dynamometer wattmeter can be used for?

Last Answer : A dynamometer wattmeter can be used for both D.C. and A.C.

A moving system force in an analog instruments which causes the moving system to deflect from its zero position.

Description : A moving system force in an analog instruments which causes the moving system to deflect from its zero position.

Last Answer : deflecting force

A moving system force in analog instruments which ensures that the deflection of the pointer for a given value of measured quantity always has the same value

Description : A moving system force in analog instruments which ensures that the deflection of the pointer for a given value of measured quantity always has the same value

Last Answer : controlling force

Which of the following forces does not act on the moving systems of analog instruments?

Description : Which of the following forces does not act on the moving systems of analog instruments?

Last Answer : an electrostatic force

Horizontally mounted moving iron instruments use

Description : Horizontally mounted moving iron instruments use   (a) Eddy current damping (b) Electromagnetic damping (c) Fluid friction damping (d) Air friction damping

Last Answer : Horizontally mounted moving iron instruments use Air friction damping

Moving iron and PMMC instruments can be distinguished from each other by looking at:

Last Answer : Moving iron and PMMC instruments can be distinguished from each other by looking at: Scale