85. Barometer is used to measure
A.Pressure in pipes, channels etc.
B.Atmospheric pressure
C.Very low pressure
D.Difference of pressure between two points

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86. Which of the following instrument can be used for measuring speed of a submarine moving in deep sea
A.Venturimeter
B.Pitot tube.
C.Hot wire anemometer
D.Rotameter

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87. Which of the following instrument can be used for measuring speed of an aeroplane (a) Venturimeter (b) Orifice plate
A.(c) hot wire anemometer
B.(a) Venturimeter
C.(e) pitot tube.
D.8.114. Which of the following instruments is used to measure flow on the application of Bernoulli's theorem

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88. Which of the following instruments is used to measure flow on the application of Bernoulli's theorem
A.Venturimeter
B.All of the above.
C.Nozzle
D.Pitot tube

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89. The speed of sound in a ideal gas varies directly as its
A.Pressure
B.Absolute temperature.
C.Density
D.Modulus of elasticity

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90. Flow maters based on obstruction principle like orifice plates can be used with Reynold's number upto approximately
A.500
B.1000
C.2000
D.4000

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91. Dynamic viscosity of most of the liquids with rise in temperature
A.Increases
B.Decreases
C.(a) remains unaffected
D.Unpredictable

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