Electrostatic instrument uses the principle of the variation of

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Answer :

Electrostatic instrument uses the principle of the variation of Capacitance with the voltage.

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Electrostatic type instruments are primarily used as

Description : Electrostatic type instruments are primarily used as 

Last Answer : Voltmeter

Electrostatic instruments are normally used for

Last Answer :  Electrostatic instruments are normally used for High voltage measurements.

Inductance and capacitance in the electrostatic system of units has the dimensions of

Last Answer : Inductance and capacitance in the electrostatic system of units has the dimensions of length.

The electrostatic instruments can be used without serious loss of accuracy upto ......... frequency

Last Answer : The electrostatic instruments can be used without serious loss of accuracy upto 100kHz frequency.

Answer the following S. No Statement Chose the correct answer OR Fill-in-the-blanks 1 Fyrite measures CO2, O2 and SO2 True/False 2 Ultrasonic Flow Meter uses the principle of____& ____ Fill in the blanks 3 Non Contact Infrared Thermometer cannot measure temperature of objects placed in hazardous places True/False 4 To measure the RPM of a Flywheel, ______ type of RPM meter is used and for a visible shaft-end _______ type of RPM meter is used. Fill in the blanks 5 In a switch yard, _____ instrument is used to identify the loose joints and terminations Fill in the blanks 6 Every Designated Consumer shall have its first energy audit conducted by ________ Energy Auditor within ______ months of

Description :  Answer the following S. No Statement Chose the correct  answer OR Fill-in-the-blanks 1 Fyrite measures CO2, O2 and SO2 True/False 2 Ultrasonic Flow Meter uses the principle of____& ____ Fill in the ... of RPM  meter is used and for a visible shaft-end _______ type of  RPM meter is used.

Last Answer : Sr  No Statement Chose the correct  answer OR Fill-in-the-blanks Solution 1 Fyrite measures CO2, O2 and  SO2 True/False False 2 Ultrasonic Flow Meter uses the  principle of____& ____ ... ]  10 In a gasification system the  reduction zone is above the  combustion zone True/False False

Operating principle of cyclone separator is based on the action of __________ dust particles. (A) Diffusion of (B) Centrifugal force on (C) Gravitational force on (D) Electrostatic force on

Description : Operating principle of cyclone separator is based on the action of __________ dust particles. (A) Diffusion of (B) Centrifugal force on (C) Gravitational force on (D) Electrostatic force on

Last Answer : (B) Centrifugal force on

(i) Explain the working principle of Electrostatic and permanent magnet speaker. (ii) Compare Woofer and Tweeter.

Description : (i) Explain the working principle of Electrostatic and permanent magnet speaker. (ii) Compare Woofer and Tweeter.

Last Answer : (i) Electrostatic speaker. The voltage is applied to the central or movable plate, the signal voltage is applied to the two outside plates causes these plates to attract or repel each other. ... to minimize the impact of this resonant frequency. (ii) Compare Woofer and Tweeter.

A Kelvin electrostatic voltmeter uses what method of damping?

Description : A Kelvin electrostatic voltmeter uses what method of damping?

Last Answer : fluid friction

Principle of operation of LVDT is based on the variation of...

Description : Principle of operation of LVDT is based on the variation of  A) Mutual inductance B) Self-inductance C) Capacitance D) Resistance

Last Answer : 3

The effect of stray magnetic fields on the actuating torque of a portable instrument is maximum when the

Description : The effect of stray magnetic fields on the actuating torque of a portable instrument is maximum when the operating field of the instrument and the stray fields are  A) Perpendicular B) Parallel C) Inclined at 60" D) Inclined at 30°

Last Answer : The effect of stray magnetic fields on the actuating torque of a portable instrument is maximum when the operating field of the instrument and the stray fields are Parallel 

In the case of an instrument reading of 8.3 V with a 0 to 150 voltmeter having a guaranteed accuracy of

Description :  In the case of an instrument reading of 8.3 V with a 0 to 150 voltmeter having a guaranteed accuracy of 1% full scale reading, the percentage limiting error is   (A) 1.810% (B) 0.181% (C)12.45% (D) 0.0018%

Last Answer :  In the case of an instrument reading of 8.3 V with a 0 to 150 voltmeter having a guaranteed accuracy of 1% full scale reading, the percentage limiting error is 12.45%

A moving coil instrument has a resistance of 10 W and gives full scale deflection when carrying

Description : A moving coil instrument has a resistance of 10 W and gives full scale deflection when carrying a current of 50 mA. To measure current upto 100 A, we will have to connect • 10 W resistance in series • 10 W resistance in parallel • 10/1999 W resistance in series • 10/1999 W resistance in parallel

Last Answer : A moving coil instrument has a resistance of 10 W and gives full scale deflection when carrying a current of 50 mA. To measure current upto 100 A, we will have to connect 10/1999 W resistance in parallel

A Pyrheliometer is an instrument to measure :

Description : A Pyrheliometer is an instrument to measure :  (A) temperature of solar photovoltaic cell  (B) intensity of direct solar radiation at normal incidence  (C) intensity of indirect solar radiation  (D) efficiency of a solar photovoltaic cell

Last Answer : A Pyrheliometer is an instrument to measure : intensity of direct solar radiation at normal incidence 

In a PMMC instrument, the damping provided is :

Description : In a PMMC instrument, the damping provided is :  (A) air damping (C) eddy current damping (B) fluid damping (D) magnetic damping using a magnet

Last Answer : In a PMMC instrument, the damping provided is : eddy current damping 

A PMMC instrument has FSD of 100 μA and a coil resistance of 1 kΩ. To convert the instrument into an

Description : A PMMC instrument has FSD of 100 μA and a coil resistance of 1 kΩ. To convert the instrument into an ammeter with full scale deflection of 100 mA, the required shunt resistance is (A) 1 Ω (B) 1.001 Ω (C) 0.5 Ω (D) 10 Ω

Last Answer : A PMMC instrument has FSD of 100 μA and a coil resistance of 1 kΩ. To convert the instrument into an ammeter with full scale deflection of 100 mA, the required shunt resistance is 1.001 Ω

Eddy current damping cannot be used for moving iron instrument because

Description : Eddy current damping cannot be used for moving iron instrument because

Last Answer : Eddy current damping cannot be used for moving iron instrument because the presence of a permanent magnet required for such purpose would affect the deflection and hence the reading of the instrument

Identify the instrument that does not exist (A) Dynamo-meter type ammeter (B) Dynamo-meter type

Description : Identify the instrument that does not exist (A) Dynamo-meter type ammeter (B) Dynamo-meter type wattmeter (C) Moving-iron voltmeter (D) Moving-iron wattmeter

Last Answer : Identify the instrument that does not exist (A) Dynamo-meter type ammeter (B) Dynamo-meter type wattmeter (C) Moving-iron voltmeter (D) Moving-iron wattmeter

In a gravity controlled instrument, the deflection angle is proportional to

Last Answer :  In a gravity controlled instrument, the deflection angle is proportional to sine inverse of measurand.

In a moving coil instrument, the deflecting torque is proportional to

Last Answer :  In a moving coil instrument, the deflecting torque is proportional to Current.

The repeat accuracy of an instrument can be judged from its

Last Answer : The repeat accuracy of an instrument can be judged from its standard deviation of error.

If the instrument is to have a wide range, the instrument should have

Last Answer : If the instrument is to have a wide range, the instrument should have Logarithmic scale.

The error of an instrument is normally given as a percentage of

Last Answer : The error of an instrument is normally given as a percentage of full-scale value.

An instrument to be used for measurement and control should preferably have

Last Answer : An instrument to be used for measurement and control should preferably have Linear output and fast response

For the indicating instrument the preferred damping condition is

Last Answer : For the indicating instrument the preferred damping condition is  a damping coefficient of 0.8 to 1.

A moving coil instrument is used as an ohmmeter. The indicating scale of the meter will be

Last Answer : A moving coil instrument is used as an ohmmeter. The indicating scale of the meter will be Hyperbolic.

The sensitivity of an instrument is

Last Answer : The sensitivity of an instrument is ratio of the change in the magnitude of the output to the corresponding change in the magnitude of the input.

The percentage limiting error, in the case of an instrument reading ...

Description :  The percentage limiting error, in the case of an instrument reading of 8.3V with a 0 to 150V voltmeter having a guaranteed accuracy of 1% full-scale reading is

Last Answer :  The percentage limiting error, in the case of an instrument reading of 8.3V with a 0 to 150V voltmeter having a guaranteed accuracy of 1% full-scale reading is 18.10%.

An instrument transformer is used to extend the range of

Last Answer : An instrument transformer is used to extend the range of induction instrument.

The instrument having its deflection depends upon average value is:

Last Answer : The instrument having its deflection depends upon average value is:  Rectifier type

Megger is an instrument used for the measurement of:

Last Answer : Megger is an instrument used for the measurement of: High resistance and insulation resistance

An instrument that is capable of measuring only dc is:

Last Answer : An instrument that is capable of measuring only dc is: Moving coil

PMMC instrument gives uniform scale because:

Description : PMMC instrument gives uniform scale because:

Last Answer : PMMC instrument gives uniform scale because: It uses spring control and The deflection torque is proportional to the instrument current.

The damping torque must operate only when the moving system of the indicating instrument is:

Last Answer : The damping torque must operate only when the moving system of the indicating instrument is: Actually moving

The reliability of the instrument refer to:

Last Answer : The reliability of the instrument refer to: Degree to which repeatability continues to remain within specified limits

The deflection of hot-wire instrument depends on:

Last Answer : The deflection of hot-wire instrument depends on: RMS value of the alternating 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

A PMMC instrument can be used as a fluxmeter by:

Last Answer : A PMMC instrument can be used as a fluxmeter by: Removing the control spring

Hysteresis of an instrument means:

Last Answer : Hysteresis of an instrument means: The change in the same reading when input is first increased and then decreased.

Instrument transformers are?

Last Answer : Instrument transformers are potential transformers, current transformers.

The rectifier instrument is not free from?

Last Answer : The rectifier instrument is not free from frequency error.

A multirange instrument has?

Last Answer : A multirange instrument has multiple shunt or series resistances inside the meter.

The gravity controlled instrument has crowded scale because current is proportional to?

Last Answer : The gravity controlled instrument has crowded scale because current is proportional to sine of deflection angle.

If an instrument has cramped scale for larger values, then it follows?

Last Answer : If an instrument has cramped scale for larger values, then it follows logarithmic law.

The ratio of maximum displacement deviation to full scale deviation of the instrument is called?

Description : The ratio of maximum displacement deviation to full scale deviation of the instrument is called?

Last Answer : The ratio of maximum displacement deviation to full scale deviation of the instrument is called linearity.

The scale of a rectifier instrument is?

Last Answer : The scale of a rectifier instrument is linear.

A moving iron instrument can be used for?

Last Answer : A moving iron instrument can be used for both D.C. and A.C.

The disc of an instrument using eddy current damping should be of?

Last Answer : The disc of an instrument using eddy current damping should be of conducting and non-magnetic material.

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

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

The pointer of an indicating instrument should be?

Last Answer : The pointer of an indicating instrument should be very light.

Which is an instrument which measures insulation resistance of an electric circuit relative to earth and one another?

Last Answer : Meggar is an instrument which measures the insulation resistance of an electric circuit relative to earth and one another.