Related MCQ Question

• Which of the following essential features is possessed by indicating instrument?
• The spring material used in a spring control device should have the following property.
• Which of the following properties damping oil must possess?
• A moving-coil permanent-magnet instrument can be used as flux-meter
• Which of the following devices may be used for extending the range of instruments?
• An induction meter can handle current upto
• Induction type single phase energy meters measure electric energy in
• Most common form of AC meters met with in every day domestic and industrial installations are 
• Which of the following meters are not used on DC circuits?
• A potentiometer may be used for
• Which instrument is used for measuring the insulation resistance of an electric circuit relative to earth and one another?
• The household energy meter is
• The pointer of an indicating instrument should be 
• The chemical effect of current is used in
• In majority of instruments damping is provided by 
• An ammeter is a 
• In a portable instrument, the controlling torque is provided by
• The disc of an instrument using eddy current damping should be of 
• The switch board instruments 
• The function of shunt in an ammeter is to
• The multiplier and the meter coil in a voltmeter are in
• A moving iron instrument can be used for
• The scale of a rectifier instrument is 
• For measuring current at high frequency, we should use 
• The resistance in the circuit of the moving coil of a dynamometer wattmeter should be
• A dynamometer wattmeter can be used for
• An induction wattmeter can be used for 
• The pressure coil of a wattmeter should be connected on the supply side of the current coil when 
• In a low power factor wattmeter, the pressure coil is connected 
• In a low power factor wattmeter, the compensating coil is connected 
• For measuring a very high resistance, we should use 
• The electrical power to a megger 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
• A direct current can be measured by
• Potentiometer is used for
• To measure a resistance with the help of a potentiometer it is
• A phase shifting transformer is used in conjunction with 
• Basically a potentiometer is a device for 
• In order to achieve high accuracy, the slide wire of a potentiometer should be 
• 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
• If the current in a capacitor leads the voltage by  80 degree, the loss angle of the capacitor is
• In a Schering bridge the potential of the detector above earth potential is
• To avoid the effect of stray magnetic field in AC bridges, we can use
• A power factor meter has
• In a single phase power factor meter, the phase difference between the currents in the two pressure coils is 
• In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at 
• In a vibrating reed frequency meter the natural frequencies of two adjacent reeds have a difference of
• In a Weston frequency meter, the magnetic axes of the two fixed coils are
• A Weston frequency meter is
• A Weston synchronoscope is a
• In a Weston synchronoscope, the fixed coils are connected across 
• In Weston synchronoscope, the moving coil is connected across 
• The power factor of a single phase load can be calculated if the instruments available are
• The desirable static characteristics of a measuring system are 
• The ratio of maximum displacement deviation to full scale deviation of the instrument is called
• Operating torques in analogue instruments are
• Commonly used instruments in power system measurement are 
• Damping of the Ballistic galvanometer is made small to 
• If an instrument has cramped scale for larger values, then it follows
• Volt-box is basically a device used for
• A multirange instrument has
• The rectifier instrument is not free from 
• Alternating current is measured by 
• Most sensitive galvanometer is 
• An instrument transformer is used to extend the range of 
• Wattmeter cannot be designed on the principle of
• In an energy meter braking torque is produced to
• Two holes in the disc of energy meter are drilled at the opposite sides of the spindle to
• Vector voltmeter is used to measure
• The principle of vector voltmeter is based on
• To measure radio frequency, the suitable frequency meter is
• Which Instrument is free from hysteresis and eddy current errors?
• The readings of a dynamometer type wattmeter can be highly erratic at 
• A dynamometer type wattmeter has
• Which of the following cannot be measured by multimeter?
• Which Instrument will draw least current from the circuit?
• A potentiometer works on 
• Schering bridge is used to
• Schering bridge can be used to measure
• A wattmeter will be free from the effects of power factor and frequency variations in case 
• Which bridge is preferred for the measurement of inductance having high  Q-factor?
• Q-meter is used to measure
• The meter constant of single phase energy meter is expressed in
• Moving coil and moving iron type instruments can be distinguished by their
• In order to get best results, indicating instruments are
• The dissipation factor of a capacitor can be measured with 
• Practically, indicating instruments should be
• In hot wire instruments, the sensing wire is made of 
• An ammeter can be converted into a voltmeter by connecting
• A moving iron type ammeter has few turns of thick wire so that 
• Hot wire instruments read
• Which of the following instruments can be used for measuring  132 kV AC voltage?
• In which instruments the deflecting torque depends on the frequency?
• The commonly used material for thermocouples is
• Bolometer is used to measure
• The frequency meter that can be used for the measurement of radio frequency is
• The phenomenon of ‘creeping’ occurs in 
• The ratio error of a current transformer is due to
• EMF of a Weston cell is accurately measured by
• Weston cell is a
• The EMF  of a Weston standard cell can be measured by 
• Permanent magnets used in instruments are generally made of
• Which type of voltmeter has the least power consumption?
• The internal resistance of a voltmeter must be very high so that 
• Which bridge is used for the precise measurement of inductances over a wide range?
• Which of the following bridges is used to measure power factor?
• Moving parts of instruments are supported in  ___________ bearings.
• A power factor meter has  ____________ control springs.
• The Dead time of an instrument is
• Voltmeter sensitivity is expressed in
• Control springs in instruments are made up of
• Torque weight ratio will be least in  ___________ instruments.
• Torque/weight ratio of an instrument indicates
• Scale of an instrument will be uniform if
• Swamping resistance is used in a PMMC instrument to
• A high resistance is usually connected in series with an electrostatic voltmeter
• A milli-ammeter can be used as 
• The deflection of a hot wire instrument depends on
• Which type of instrument is used to measure very small currents of high frequency?
• The accuracy of a meter is determined by  ____________ deflection.
• The sensitivity accuracy of an instrument depends on
• The sensitivity inaccuracy of an instrument does not depend on
• The error when reading at half-scale in an instrument is
• The reliability of an instrument refers to
• Damping in an instrument provides
• Hysteresis is an instrument means
• Which of the following instruments has the best accuracy?
• An electrodynamic meter can be used to measure 
• The total power delivered to a three-phase load is equal to
• An induction wattmeter measures 
• The instrument used for the measurement of power at 500 MHz is 
• The reed frequency meter is essentially a
• The Q-meter works on the principle of 
• Null type recorders are __________ recorders.
• Which of the following cannot be used to measure pressure?
• Which of the following cannot be measured by Ring-balance meter?
• Load cell is essentially a  _____________
• Which of the following can measure pressure directly?
• Which of the following is used to measure flow of air around an aeroplane?
• A differential transformer is a
• which of the following is not a signal conditioner?
• A wave guide acts as a  ___________ pass filter 
• Which instrument is used to measure frequency in waveguide?
• Which of the following is not an element of electro-pneumatic pressure transmitter.
• The cathode of a CRO is usually coated with 
• The input impedance of a CRO is 
• A   CRO can be used to measure 
• A double beam oscilloscope has
• Phosphor coating for cathode ray tubes CRT is provided on
• The brightest spot on a cathode ray screen occurs at 
• For better results a strain gauge should have low 
• Rosette gauges are used to
• A dummy strain gauge is used to 
• The output of LVDT  is in the form of 
• Which of the following is a active transducer?
• Which of the following is a digital transducer?
• LVDT  is a  ____________  transducer.
• The advantages of an LVDT are
• Which of the following is an analogue transducer?
• In optical pyrometer temperature is measured by
• Which of the following is a low cost thermocouple?
• Relative permittivity can be measured by  ___________ bridge