Measurement And Instrumentation MCQ

Test your knowledge with important Measurement And Instrumentation MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Measurement And Instrumentation MCQs at Bissoy

• When a capacitor was connected to the terminal of ohmmeter, the pointer indicated a low resistance initially and then slowly came to infinity position. This shows that capacitor is
  ক

  Short-circuited

  খ

  All right

  গ

  Faulty

  ঘ

  None of the above
• Wien bridge is useful for measuring
  ক

  Very high frequency

  খ

  Low frequency

  গ

  Medium frequency

  ঘ

  High frequency
• Which of the following instruments can be used to measure AC current only?
  ক

  Permanent Magnet Type ammeter

  খ

  Induction type ammeter

  গ

  Moving iron voltmeter

  ঘ

  Moving iron ammeter
• The thermocouple instruments do not have
  ক

  High sensitivity

  খ

  Absence of frequency error

  গ

  Independence of ambient temperature

  ঘ

  High degree of measuring accuracy
• The thermocouple instrument will measure
  ক

  Current

  খ

  Voltage

  গ

  Flux

  ঘ

  None of the above
• With a sweep time 10ms across the screen the approx. horizontal sawtooth frequency will be
  ক

  50Hz

  খ

  100Hz

  গ

  1kHz

  ঘ

  500Hz
• To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken
  ক

  From a source which is not the same as the unknown voltage

  খ

  From a battery

  গ

  From the same source as the unknown voltage

  ঘ

  Any of the above
• It can be stated that
  ক

  CT operates at almost the same flux density as a PT

  খ

  CT operates with a higher flux density than PT

  গ

  CT operates with considerably lower flux density than a PT

  ঘ

  No generalisation can be made with regard to the flux densities in CT and PT
• If the instrument is to have a wide range, the instrument should have
  ক

  Linear scale

  খ

  Square-law scale

  গ

  Exponential scale

  ঘ

  Logarithmic scale
• The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100 ohms. If this meter is to have full deflection at 5A, what is the value of the shunt resistance to be used?
  ক

  49.99 ohms

  খ

  $$\frac{1}{{49.99}}{\text{ ohms}}$$

  গ

  1 ohm

  ঘ

  2 ohms
• Which instrument has identical calibration for ac as well as dc values?
  ক

  Hot wire type

  খ

  Moving coil type

  গ

  Induction type

  ঘ

  Moving iron type
• Jewels are used in instruments for the purpose of
  ক

  Damping

  খ

  Torque control

  গ

  Suppressing noise

  ঘ

  Bearing
• PMMC type instruments normally use
  ক

  Air friction damping

  খ

  Fluid friction damping

  গ

  Eddy current damping

  ঘ

  None of the above
• A spring controlled indicating instrument has a deflection of 90° for maximum current I. The corresponding deflection for a gravity controlled instrument is
  ক

  90°

  খ

  120°

  গ

  30°

  ঘ

  0°
• The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100 ohms. This is to have full deflection when 100V is measured. What is the value of series resistor to be used?
  ক

  99.99 K ohms

  খ

  100 K ohms

  গ

  99.99 ohms

  ঘ

  100 ohms
• Electrostatic instruments are normally used for
  ক

  Low current measurements

  খ

  High current measurements

  গ

  Low voltage measurements

  ঘ

  High voltage measurements
• An instrument to be used for measurement and control should preferably have
  ক

  Dead zone and dead time

  খ

  Linear output and fast response

  গ

  Non-linear output

  ঘ

  A highly damped response
• Which of the following devices should be used for accurate measurement of low D.C. voltage?
  ক

  Small range moving coil voltmeter

  খ

  D.C. potentiometer

  গ

  Small range thermocouple voltmeter

  ঘ

  None of the above
• Which meter is suitable for the measurement of 10mV at 50MHz?
  ক

  Moving iron voltmeter

  খ

  VTVM

  গ

  Moving coil voltmeter

  ঘ

  CRO
• The problem of Electrostatic coupling in a transformer is acute at
  ক

  Low frequencies

  খ

  Power frequencies

  গ

  High frequencies

  ঘ

  High load on the transformer
• In a gravity controlled instrument, the deflection angle is proportional
  ক

  Measurand

  খ

  Square of the measurand

  গ

  Sine inverse of measurand

  ঘ

  Sine of the measurand
• The resistance offered to the passage of an in-varying current by a column of mercury at the temperature of melting ice of mass 14.4521 gms of uniform cross-sectional area and length 106.3cm is
  ক

  Standard ohm

  খ

  One international ohm

  গ

  One ohm according to SI units

  ঘ

  One ohm according to working standards
• The repeat accuracy of an instrument can be judged from its
  ক

  Static error

  খ

  Linearity error

  গ

  Dynamic error

  ঘ

  Standard deviation of error
• The error of an instrument is normally given as a percentage of
  ক

  Measured value

  খ

  Full-scale value

  গ

  Mean value

  ঘ

  Rms value
• The form factor in AC is the ratio of
  ক

  Peak value to average value

  খ

  Peak value to rms value

  গ

  Rms value to average value

  ঘ

  Rms value to peak value
• The multiplier and the meter coil in a voltmeter are in
  ক

  Series

  খ

  Parallel

  গ

  Series-parallel

  ঘ

  None of the above
• Wagner earthing device is used to eliminate errors due to
  ক

  Electrostatic coupling

  খ

  Electromagnetic coupling

  গ

  Both A and B

  ঘ

  None of the above
• A mulliammeter can be used as
  ক

  Voltmeter and ammeter

  খ

  Wattmeter

  গ

  Ohmmeter

  ঘ

  Frequency meter
• The EMF of Weston standard cell is measured using
  ক

  Moving- iron meter

  খ

  Moving-coil meter

  গ

  Digital Volt meter

  ঘ

  Potentiometer
• It is found that 10A current passes through a resistor of 10°hms. The resistor has 5% tolerance . The error in measurement of current can be as high as 5%. What is max error in measurement of power, calculated from measured value of I and the nominal value of resistor?
  ক

  100W

  খ

  150W

  গ

  50W

  ঘ

  200W