Process Control and Instrumentation

111. Liquid flow rate in a small channel is best measured by a/an

1. Weir
2. Pitot tube
3. Vane meter
4. Venturimeter

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112. Liquid flow rate in an open channel cannot be measured by a/an

1. Orifice meter
2. Cipolletti weir
3. Rectangular weir
4. V-notch

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113. Liquid levels in autoclaves are measured by

1. Simple float
2. Differential float type manometer
3. Glass gauge
4. None of these

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114. Load cells are used for the measurement of

1. Stress
2. Weight
3. Strain
4. Velocity

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115. Magnetic flowmeters are generally not used for the velocity/flow measurement of hydrocarbons due to their

1. Low thermal conductivity
2. Low electrical conductivity
3. High viscosity index
4. Low flash point

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116. Mass spectrometer is used for the composition analysis of

1. Alloys
2. Solids
3. Isotopes
4. None of these

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117. Maximum differential pressure in liquid manometer is _________ psi.

1. 20
2. 30
3. 40
4. 50

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118. Mcleod gauge is used to measure the

1. Point velocity
2. Flow rate
3. Vacuum
4. Pressure

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119. Mcleod gauge measures the _________ pressure.

1. Positive
2. Sub-atmospheric
3. Very high
4. Atmospheric

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120. Measurement of pressure in ammonia reactor is done by

1. Bourdon gauge
2. U-tube manometer
3. Inclined tube manometer
4. Pirani gauge

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