Process Control and Instrumentation Engineering Questions Answers - Set 11 - ObjectiveBooks

Process Control and Instrumentation Engineering Questions Answers - Set 11

Practice Test: Question Set - 11

1. Cascade control means
    (A) Feed forward control
    (B) More than one feed-back loop
    (C) On-off control
    (D) One feed-back loop

2. To increase the speed of response of a pressure spring liquid or gas expansion thermometer, the clearance space between the thermometer bulb and the thermal well should not be filled with
    (A) Air
    (B) A metal powder or graphite
    (C) Oil
    (D) Mercury

3. In Bode plot, φ vs. ω is plotted on a/an ________ graph paper.
    (A) log-log
    (B) Ordinary
    (C) Semi-log
    (D) Triangular

4. Specific gravity of a liquid cannot be measured by a/an
    (A) Anemometer
    (B) Specific gravity bottle
    (C) Pycnometer
    (D) Hydrometer

5. Which of the following thermocouples has the widest temperature measurement range?
    (A) Iron-constantan
    (B) Chromel-alumel
    (C) Copper-constantan
    (D) Platinum-platinum/rhodium

6. Mass spectrometer is used for the composition analysis of
    (A) Alloys
    (B) Solids
    (C) Isotopes
    (D) None of these

7. The thermal emf-temperature relationship of most thermocouples is
    (A) Linear
    (B) Parabolic
    (C) Exponential
    (D) Square root

8. The ________ of a vapor pressure thermometer is a primary element.
    (A) Pointer
    (B) Bourdon tube
    (C) Bulb
    (D) None of these

9. ________ is an example of distributed parameter system
    (A) Tubular reactor
    (B) CSTR
    (C) On-off controller
    (D) None of these

10. Helium gas constant volume thermometer is suitable for the measurement of a temperature of ________ °C.
    (A) < 100
    (B) < 0
    (C) > 0
    (D) > 800

11. Which of the following can measure temperatures in the range of - 20 to 300°C?
    (A) Mercury in glass thermometer
    (B) Vapor pressure thermometer
    (C) Resistance thermometer
    (D) None of these

12. Flow rate of a river is measured by a/an
    (A) Pitot tube
    (B) Vane meter
    (C) Kennison nozzle
    (D) Open weir

13. The level of a liquid under pressure can be determined using
    (A) Bubbler system
    (B) Differential pressure manometer
    (C) Diaphragm box system
    (D) Air-trap system

14. Thermal conductivity based continuous flue gas analyzer makes use of varying thermal conductivity of the constituents of flue gases. Which of the following constituents of flue gases has the maximum thermal conductivity?
    (A) CO2
    (B) N2
    (C) O2
    (D) CO

15. In Bode plot, A.R. vs. w is plotted on a/an ________ graph paper.
    (A) Log-lag
    (B) Triangular
    (C) Ordinary
    (D) Semi-log

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