Process Control and Instrumentation

101. In a single tank system, the transfer function of _________ to inlet flow rate is 1/(TS+1).

1. Outlet flow rate
2. Level
3. Both (A) & (B)
4. Neither (A) nor (B)

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102. In a single tank system, the transfer function of level to inlet flow rate is

1. R/TS
2. R/(TS + 1)
3. 1/TS
4. None of these

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103. In an exothermic chemical reactor, the manipulated variable is the flow rate of

1. Coolant
2. Reactants
3. Product
4. None of these

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104. In Bode plot, φ vs. ω is plotted on a/an _________ graph paper.

1. log-log
2. Ordinary
3. Semi-log
4. Triangular

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105. In Bode plot, A.R. vs. w is plotted on a/an _________ graph paper.

1. Log-lag
2. Triangular
3. Ordinary
4. Semi-log

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106. In second order underdamped system,

1. Decay ratio = overshoot
2. Decay ratio = (overshoot)²
3. Overshoot increases for increasing damping co-efficient
4. Large damping co-efficient means smaller damping

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107. Instrumentation in a plant offers the advantage of

1. Greater safety of operation
2. Better quality of product
3. Greater operation economy
4. All (A), (B) and (C)

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108. Liquid argon level in a pressurised storage tank (at 3 kg/cm²) is measured by a/an

1. Gage glass
2. External float gage
3. Differential pressure gage
4. None of these

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109. Liquid column manometers are used for measuring the pressure _________ kgf/cm².

1. < 2 (gage)
2. < 3 (gage)
3. < 10 (gage)
4. < atmospheric

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110. Liquid discharge from a tank or reservoir cannot be measured by

1. Orificemeter
2. Weirs
3. Mouthpieces
4. Notches

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