Process Control and Instrumentation

1. _________ are analysed using a Polarograph.

1. Isotonic solutions
2. Solids
3. Liquids
4. Gases

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2. _________ controller has the maximum stabilising time.

1. P
2. PD
3. PI
4. PID

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3. _________ is an example of distributed parameter system

1. Tubular reactor
2. CSTR
3. On-off controller
4. None of these

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4. _________ is the static characteristics of an instrument.

1. Response
2. Tine lag
3. Drift
4. Dynamic error

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5. _________ is undesirable in thermocouples used in industries,

1. Linear relation of emf to temperature
2. Corrosion resistance
3. Oxidation resistance
4. Non-linear relation of emf to temperature

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6. _________ stability method uses open loop transfer function.

1. Nyquist
2. Mikhailov
3. Ruth
4. None of these

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7. _________ thermometer cannot measure sub-zero (<0° C) temperature,

1. Mercury in glass
2. Bimetallic
3. Vapor pressure
4. Resistance

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8. A barometer measures the _________ pressure.

1. Absolute
2. Gauge
3. Absolute as well as gauge
4. dynamic

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9. A bimetallic thermometer as compared to industrial mercury in glass thermometer has almost the same

1. Temperature measuring range (- 40°C to 450°C)
2. Accuracy (± 1% of span)
3. Speed of response
4. All a, b & c

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10. A bolometer is

1. Used for the measurement of thermal radiation
2. An element which senses optical input and delivers thermal output
3. Both (A) & (B)
4. Neither (A) nor (B)

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