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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