Mechanical Measurements Set 3

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This set of Mechanical Measurements Multiple Choice Questions & Answers (MCQs) focuses on Mechanical Measurements Set 3

Q1 | A pirani gauge works on the principle of change of
  • Capacitance
  • Electrical resistivity
  • Relative humidity
  • Thermal conductivity of medium
  • Conductance
Q2 | The thickness of oil film between gage blocks is of the order of
  • 0.2 microinch
  • 0.5 microinch
  • 1 microinch
  • None of the above
  • Any of the above
Q3 | The degree of perfection used in instruments, the methods and the observations, is known as
  • Error
  • Least count
  • Accuracy
  • Efficiency
  • Precision
Q4 | A flow measuring system with a square root extractor usually has
  • Linear scale
  • No-linear scale
  • Inverse square law curve
  • Mass flow rate scale
  • None of the above
Q5 | A flapper nozzle is used in
  • Electronic controller
  • Hydraulic Controller
  • Pneumatic controller
  • All of the above
  • None of the above
Q6 | Which of the following materials has minimum temperature coefficient of resistance
  • Constantan
  • Isoelastic
  • Nichrome
  • None of the above
  • Any of the above
Q7 | The direction of current in case of antimony bismuth thermocouple will be
  • From antimony to bismuth at the cold junction
  • From antimony to bismuth at hot junction
  • From bismuth to antimony at cold junction
  • Any of the above
  • None of the above
Q8 | A hydrometer can be used to measure
  • Specific gravity of solids
  • Temperature coefficient of liquids
  • Relative humidity of air
  • Conductivity of gases
  • Specific gravity of liquids
Q9 | The advantage of piezoelectric crystal as transducer is
  • High frequency response
  • High output
  • Negligible phase shift
  • Small size
  • All of the above
Q10 | In a thermocouple, the potential between the two junctions is due to the temperature gradient along the conductors in the circuit. This effect is named as
  • Peltier's effect
  • Thomson's effect
  • Seebeck effect
  • none of the above
  • Any of the above
Q11 | Nickel is the major constituent of which the following pressure gauge Bourdon tube material
  • Alloy steel
  • Phosphor bronze
  • K' monel
  • Beryllium copper
  • Stainless steel
Q12 | In a car the fuel level is measured by
  • Electronic transducer
  • Float method
  • Dip stick
  • Any of the above
  • None of the above
Q13 | Flow rate of a river can be determined by
  • Weir
  • Orifice
  • Venturimeter
  • Kundt's tube
  • Kennison nozzle
Q14 | Under force-current analogy, the reciprocal of inductance is considered analogous to
  • Mass
  • Spring constant
  • Momentum
  • Displacement
  • Velocity
Q15 | The larget range through which the measurable variable can change without the change being indicated by the indicator is known as
  • Probability error
  • Time lag
  • Dead zone
  • Threshold sensitivity
  • None of the above
Q16 | Which of the following instruments is preferred for the measurement of pressure in a steam condenser
  • Kentometer
  • McLeod gage
  • Bourdon tube
  • None of the above
  • Any of the above
Q17 | Which of the following materials has macimum gaga factor
  • Nichrome
  • Isoelastic
  • Karma
  • None of the above
  • Any of the above
Q18 | The most sensitive thermocouple out of the following
  • copper-constantan
  • chromel-constantan
  • iron-constantan
  • None of the above
  • Any of the above
Q19 | Invar, the least expensible steel alloys used for measuring tapes contains about 30% of
  • Vanadium
  • Cobalt
  • Aluminium
  • Copper
  • Nickel
Q20 | The statement "The most probable value of an observed quantity available from a given set of observation is the one for which the sum of the square of errors is a minimum" is known as
  • Principle of square errors
  • Pythogorus theorem
  • Principle of least squares
  • Law of square probability
  • Law of errors
Q21 | For bridge circuit of strain gauge which source of power will be ideal?
  • High frequency ac source
  • Low frequency ac source
  • Difficulties in connections and high cost of auxiliary equipment
  • Low voltage of source
  • High voltage dc source
Q22 | A first order system when subjected to a step input has a temperature rise of 25?C after one hour and 37.5?C after two hours, starting from cold conditions. The final steady temperature rise will be
  • 5?C
  • 15?C
  • 35?C
  • 25?C
  • 50?C
Q23 | The degree of perfection used in instruments, techniques are observations is known as
  • Accuracy
  • Precision
  • Least Count
  • None of the above
  • Any of the above
Q24 | An electrometer is used for the measurement of
  • Voltages
  • Currents
  • Both (A) and (B) above
  • None of the above
  • 14
Q25 | A synchro is
  • A variable reluctance transducer
  • A parabolic transducer
  • An angular position transducer
  • A synchronizing transducer
  • Any of the above