Mechanical Measurements Set 7

Mechanical Engineering

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This set of Mechanical Measurements Multiple Choice Questions & Answers (MCQs) focuses on Mechanical Measurements Set 7

Q1 | Under force-voltage analogy, velocity is considered as analogous to
  • Resistance
  • Charge
  • Current
  • Magnetic flux
  • Inductance
Answer: Current
Q2 | Which of the following is an electric tachometer?
  • Stroboscopic tachometer
  • Eddy current tachometer
  • Drag type tachometer
  • Ignition type tachometer
  • All of the above
Answer: All of the above
Q3 | Phosphor bronze Bourdon tube can be used of pressures upto
  • 15 kg/cm2
  • 10 kg/cm2
  • 70 kg/cm2
  • 5 kg/cm2
  • 170 kg/cm2
Answer: 70 kg/cm2
Q4 | The thermometer is calibrated 150?C to 200?C. The accuracy is specified within
  • 0.5?C
  • 1?C
  • ? 1?C
Answer: 1?C
Q5 | Which of the following is not an elecment of electro-pneumatic pressure transmitter?
  • LVDT
  • Bellows
  • Opamp
  • Flapper nozzle mechanism
  • All of the above
Answer: Flapper nozzle mechanism
Q6 | In case of obstruction meters used for flow measurement, pressure recovery is maximum in the case of
  • venturi
  • flow nozzle
  • orifice
  • None of the above
  • Any of the above
Answer: venturi
Q7 | A transducer that converts the input physical phenomenon into an electrical output in the form of pulses is known as
  • Secondary transducer
  • Analogy transducer
  • Digital transducer
  • Tuned transistor
  • None of the above
Answer: Digital transducer
Q8 | Which of the following statement is wrong for thermocouple measuring instruments?
  • They read average values
  • When calibrated on dc they cannot be used for ac signals
  • They cannot take overheads
  • Their calibration dies not change with time or temperature
  • They read rms values
Answer: When calibrated on dc they cannot be used for ac signals
Q9 | In a load cell, strain gauge acts as a
  • Protective device
  • Comparator
  • Primary transducer
  • Secondary transducer
  • None of the above
Answer: Secondary transducer
Q10 | Which of the following device can be used to measure blow of air around an aeroplane?
  • Rotameter
  • Venturimeter
  • Manometer
  • Anemometer
  • Orifice
Answer: Anemometer
Q11 | Under force-current analogy, mass is considered analogous to
  • Reciprocal of resistance
  • Reciprocal of capacitance
  • Resistance
  • Current
  • Capacitance
Answer: Capacitance
Q12 | Which of the following magnetic material has highest coercive force?
  • Tungsten steel
  • Dead mild steel
  • Alcomax
  • Carbon steel
  • Cobalt steel
Answer: Alcomax
Q13 | Metres A and B require 50 mA and mA respectively to give full scale deflection. It can be concluded that
  • A is more sensitive as compared to B
  • B is more sensitive as compared to B
  • A has wider range than B
  • B has better damping as compared to A
  • None of the above
Answer: B is more sensitive as compared to B
Q14 | The accuracy of a 0 - 10 mV meter is
  • 9 mV
  • Either 9 mV or 10 mV
  • Either 9 mV or 11 mV
  • 11 mV
  • More than 11 mV
Answer: Either 9 mV or 11 mV
Q15 | The gauge factor for doped crystal is in the range
  • 100 to 5000
  • 2 to 20
  • 1 to 2
  • 0.5 to 1
  • 20 to 50
Answer: 100 to 5000
Q16 | Although semi-conductor strain gauges have high gauge factor still these are not preferred due to
  • Difficulties in connections and high cost of auxiliary equipment
  • Small size and high cost
  • Small size and high cost
  • Non-linearity
  • Non-linearity and sensitivity to temperature fluctuations
Answer: Non-linearity and sensitivity to temperature fluctuations
Q17 | A strain gauge material should have low
  • Gauge factor
  • Sensitivity
  • Resistance temperature coefficient
  • All of the above
  • 100 to 5000
Answer: Resistance temperature coefficient
Q18 | The statement 'the most probable value of an observed quantity available from a given lot of observations is the one for which the sum of the square of error is a minimum" is known as law of
  • squared errors
  • Pythagorous theorem
  • least squares
  • None of the above
  • Any of the above
Answer: least squares
Q19 | A strain gage material should have low
  • gage factor
  • strain sensitivity
  • resistance temperature coefficient
  • None of the above
  • Any of the above
Answer: resistance temperature coefficient
Q20 | The least count of a vernier caliper used in industries is generally
  • 0.001 mm
  • 1 mm
  • 0.02 mm
  • None of the above
  • None of the above
Answer: 0.02 mm
Q21 | The value of permissible error depends upon
  • The scale
  • The instrument available
  • Class of work
  • All of the above
  • None of the above
Answer: All of the above
Q22 | Stainless steel Bourdon tube pressure gauge joints are usually
  • Welded
  • Adhesive jointed
  • Soldered
  • Brazed
  • Screwed
Answer: Welded
Q23 | Which of the following is generally not used as a thermocouple material?
  • Platinum - Rhodium
  • Chromel - Alumel
  • Gold - Silver
  • Chromel - Copper
  • None of the above
Answer: Gold - Silver
Q24 | A degital thermometer has 3
  • 1.000?C
  • 1.001?C
  • 1.999?C
  • 0.999?C
  • None of the above
Answer: 1.999?C
Q25 | A geodimeter is used for the measurements of
  • Distances
  • Volumes
  • Angles
  • Bearings of a point
  • Areas
Answer: Distances
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