Welcome to your Measurement and instrumentation
The use of _____ instruments is merely confined within laboratories as standardizing instruments.
Which of the following instruments indicate the instantaneous value of the electrical quantity being measured at the time at which it is being measured ?
_____ instruments are those which measure the total quantity of electricity delivered in a particular time.
Which of the following are integrating instruments ?
Resistances can be measured with the help of
Which of the following essential features is possessed by an indicating instrument ?
A _____ device prevents the oscillation of the moving system and enables the latter to reach its final position quickly
A moving-coil permanent-magnet instrument can be used as _____ by using a low resistance shunt.
A moving-coil permanent-magnet instrument can be used as flux-meter
An induction meter can handle current upto
For handling greater currents induction wattmeters are used in conjunction with
Induction type single phase energy meters measure electric energy in
A potentiometer may be used for
is an instrument which measures the insulation resistance of an electric circuit relative to earth and one another,
The household energy meter is
A moving iron instrument can be used for
The scale of a rectifier instrument is
For measuring current at high frequency we should use
A dynamometer wattmeter can be used for
The pressure coil of a wattmeter should be connected on the supply side of the current coil when
___ voltmeter has the least power consumption.
In a low power factor wattmeter the pressure coil is connected
In a low power factor wattmeter the compensating coil is connected
The electrical power to a meggar is provided by
In a meggar controlling torque is provided by
The operating voltage of a meggar is about
Murray loop test can be used for location of
Which of the following devices should be used for accurate measurement of low D.C. voltage ?
Basically a potentiometer is a device for
For measurements on high voltage capacitors, the suitable bridge is
In an Anderson bridge, the unknown inductance is measured in terms of
Wagner earthing device is used to eliminate errors due to
For measurement of mutual inductance we can use
For measurement of inductance having high value, we should use
Standard resistor is made from
A sensitive galvanometer produces large deflection for a
Instrument transformers are
Galvanometer type recorder use
Null type recorders are ________recorders.
The potentiometric recorders have the advantage of
In a resistance potentiometer ,the nonlinearity
The resolution of a potentiometer should be
In eddy current damping system ,the disc employed should be of
Preferred material for permament magnet is
A PMMC instrument can be used as a fluxmeter by
In a flux meter ,the controlling torque is
A moving coil galvanometer is made into a dc ammeter by connecting
which of the following instrument is free from hysteresis and eddy current errors?
To increase current measurement range of an ammeter ,it is
How can a milliammeter be used as voltmeter?
The moving coil in a dynamometer wattmeter is connected
Dynamometer type wattmeters are suitable for
The pressure coil of a dynamometer type wattmeter is
which one of the following bridges will be used for the measurement of very low resistance?
When a capacitor was connected to the terminal of an ohmmeterthe pointer indicated am low resistance initially and then slowly came to infinity position. This shows that the capacitor is
The maximum sensitivity of a wheatstone bridgesis achieved when
The potentiometer is standardisedfor making it
Inductance is measured by which one of the following?
Which bridge is used to determine frequency?
Consider the following statement in respect of a wien bridge.
1.It is suitable for measurement of capacitance
2.It is not affected by harmonics present in the applied voltage
3.It is suitable for measurement of frequency
Schering bridge is suitable for measurement of
The dielectric loss of acapacitor can be measured by which one of the following
Which of the following is used to measure the leakage resistance of a capacitor ?
An advantage which a VTVM has over a non-electronic voltmeter
VTVM can be used to measure
Which dynamometer type has uniform scale?
When both deflecting and controlling torque act, the pointer of an indicating instrument comes to
The output voltage of a thermocouple
If the pointer of an indicating instrument is in motion, then what opposes deflecting torque?
The pointer of an indicating instrument is generally made of
A Wheatstone bridge is balanced if
Hot-wire instrument has a/an scale.
What CRT element provides for control of the number of electrons passing farther into the tube?
Attraction and repulsion instruments are considered as
What force in analog instrument quickly brings the moving system to rest in its final position?
What dc bridge is widely used for the accurate measurements of resistance?
Which of the following is a dc bridge that is very useful for making extremely accurate voltage measurements?
A pattern displayed by oscilloscopes which has a steady characteristic is called
Which of the voltmeter is used for measuring high direct voltage (say 10kV)?
Which instrument is the most sensitive?
which one of the following multirange voltmeters has high and constant input impedance?
A bolometer is an element that
Bolometers are used for measuring
The operation of Pirani gauge depends upon the
The working principle of a pirani gauge pressure transducer is based on which one of the following?
The ionization vacuum gauges,in construction,is similar to a
In modern electronic multimeters,a FET or MOSFET is prefeerred over BJT,because
AC tachogenerator are often built with thin metallic drag -cup rotor
In an electronic ohmmeter ,an op-amp is used as
The Q-meter works on the principle of
What is the approximate input impedence of a CRO?
In a time base generators supply ramp voltage to
In a CRT the highest positive potential is given to
Transducer for measurement of rotational displacement is
Which one of the following transducers can not measure flow in non-conducting medium?
The main drawbacks of ultrasonic flow-meter are
In radioactive method,the receiver measures fluid level ,the
Hydrometer is emploed for determination of
The most suitable transducer for monitoring continuouslyvariations in very fine thickness (say of paper in paper industry )is
In hygrometer the principle of measurement is
The circuit generally used in digital instruments to convert sine waves into rectangular pulses is a
An integrating DVM measures
The precision of a ramptype digital voltmeter depends upon
An accurate ammeter must have a resistance of
The ratio of voltage reflected from the load to the voltage applied to the load is called the
The input impedence of a common collector amplifier is ............that of a common emitter amplifier
.........is the reflected co-efficient of an open-circuited transmission line.
The image frequency in a superhetrodyne receiver with an IF of 450 kHz tuned to a signal of 1200 kHz will be
The C.R.O provides a ...............visual display of the signal waveshape on a screen
In general ,the shape of Lissajous figures depends on which of the following?
lissajous figures are used for
A dual beam CRO has which of the following?
In a CRO X and Y plates are connected to unequal voltages of equal frequency with phase shift of 90 degree the lissjous figure on the screen will be
In a CRO the colour of the spot on the screen is a characteristic of
The lissajous pattern obtained on a CRO is used to determine which of the following?
Parallel connection Q- meter is used for measuring ............impedance component .
Series connection Q- meter is used for measuring ............impedance component .
A DVM measures ...........value.
A CRO uses which of the following ?
An oscilloscope indicats .......value
A dual -trace CRO has .............vertical and ........horizontal amplifiers.
A measure of the reproducibility of measurement is known as
Capacitor microphone transducers used for ......measurement .
Voltage ratio box is used inconjuction with which of the following?
.................bridge is used for measuring audio and H.F oscillations.
To measure radio frquency ,the suitable frequency meter is
............type instrumment can have full scale deflection of 300 degrees.
.............bridge is used for the precise measurement of inductances over a wide range.
..............damping method is common in moving coil instruments
An induction wattmeter measures
A cathode ray oscilloscope can be used to measure
Thermistors have .........temperature co-efficient.
In CRO ,Schmitt circuit is used to generate
The resistance of the elements of an attenuator should be measured with
AF oscillates use the following type of tuning
For measurement of mutual inductance we can use
In an Anderson bridge ,the unknown inductance is measured in terms of known
The audio part of the TV programme is transmitted by
Measurement of high resistance?
As the deflection of the moving system increases, the controlling torque in an indicating instrument.
Which is the best type of meter movement?
When both deflecting and controlling torque act, the pointer of an indicating instrument comes to
The output voltage of a thermocouple
An instrument in which the magnitude of the measured quantity is indicated by means of a pointer
If the pointer of an indicating instrument is in motion, then what opposes deflecting torque?
How can electrical currents be inducted with a coil and a magnet?
The pointer of an indicating instrument is generally made of
A Wheatstone bridge is balanced if
The pointer of an indicating instrument is the final deflected position, the _____is zero.
A moving system force in analog instruments which causes the moving system to deflect from its zero position.
A moving force in analog instruments which ensures that the deflection of the pointer for a given value of measured quantity always has the same value.
All voltmeters except one of the following are operated by the passage of current.
Disc is made of what material in eddy current damping?
The time interval between pulses is called
An oscilloscope provides easy measurement of ______values.
What sensor provides a dc voltage approximately 1 V at 10 mW?
An element in electrons which serves as a protection against overload?
Fluid friction damping is employed in one of the following
Permanent- magnet moving coil instrument can be used in
Current range extension in moving coil instruments can be achieved by placing a ______in shunt with the instrument.
What is the reason why the scale of a permanent magnet moving coil instrument is uniform?
Tank circuit frequency can be measured by ______.
Shunts are generally made of what material?
A dynamometer instrument is mainly used as a /an
Which movement is the most expensive?
In Wheatstone bridge, bridge balance is considered where
The temperature coefficient of resistance of the shunt material is
In VTVMs, ______ is used to balance both halves of the difference amplifier or cathode-coupled amplifier.
In an oscilloscope, _______adjusts the brightness of the spot by changing the voltage on the control grid.
Multimeter typically provides measurements of ____values (for a sinusoidal waveform).
Dynamometer type instrument can be used for
What instrument which springs provide the controlling torque as well as serve to lead current into and out of the operating coil?
In VTVMs, _______refers to the smallest signal that can be reliably measured.
The frequency of rotation in some rotating machinery can be measured by a
What instrument is used for observing voltage and current waveforms?
Which of the following forces does not act on the moving systems of analog instruments?
When current through the operating coil of a moving-iron instrument is tripled the operating force becomes
What is the typical full-scale deflection current of a moving coil instrument?
What instrument is used for measuring the amount of current flowing in a circuit?
A VTVM has ………. input resistance than that of a multimeter
The input resistance of a VTVM is about ………..
If a multimeter has a sensitivity of 1000 Ω per volt and reads 50 V full scale, its internal resistance is ………..
A VTVM is never used to measure …………..
What type of meter gives a precise reading on voltage, current or resistance where there is the generation of samples at the input and then feeds it to a digital read-out?
What element of a CRT releases electrons when heated indirectly by a filament?
Moving-iron instrument has what scale?
Which part of the following is not a basic part of a CRT?
For amplitude measurements, what scale is calibrated in either volts per centimeter (V/cm), or milivolts per centimeter (mV/cm).
What provides visual display showing the form of the signal applied as a waveform on the front screen of a cathode ray oscilloscope?
Electrostatic instruments are exclusively used as
Which is the most commonly used induction type instrument?
What type of instrument is the watt-hour meter?
A certain pulse measures 10ms and has a period of 50ms. The duty cycle is
Considered as the “heart” of the cathode ray oscilloscope.
A material that glows when struck by the energetic electrons in a CRT.
Most AC voltmeters have an rms scale which is valid only if the input signal being measured is a ............. signal.
Which of the following bridges measures dc resistance?
What bridge is used to measure high-Q inductors (Q>10)?
Maxwell bridge measures an unknown inductance in terms of known
What is used for measuring medium Q coils (1<Q<10)?
What has a series RC combination in one arm and a parallel RC combination in the adjoining arm and used as a notch filter in harmonic distortion analyzer?
What is the smallest change in applied stimulus that will indicate a detectable change in deflection in a indicating instrument called?
Insulation resistance is measured by which meter?
