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  • Question

  • Which of the following filled system expansion thermometers has the lowest positive temperature measurement capability?


  • Options
  • A. Mercury in glass thermometer.
  • B. Alcohol in glass thermometer.
  • C. Fused metal (Na or K) in steel thermometer.
  • D. Nitrogen in steel thermometer.

  • Correct Answer
  • Alcohol in glass thermometer. 

    • Process Control and Instrumentation problems

    Search Results

    • 1. Water is flowing through a series of four tanks and getting heated as shown in figure. It is desired to design a cascade control scheme for controlling the temperature of water leaving the tank 4 as there is a disturbance in the temperature of a second stream entering the tank 2. Select the best place to take the secondary measurement for the second loop.

    • Options
    • A. Tank 1
    • B. Tank 2
    • C. Tank 3
    • D. Tank 4
      • Discuss
    • 2. Liquid flow rate in an open channel can not be measured by a/an

    • Options
    • A. orifice meter
    • B. cipolletti weir
    • C. rectangular weir
    • D. V-notch
      • Discuss
    • 3. Which of the following is not classified as a thermo electric pyrometer?

    • Options
    • A. Resistance thermometer.
    • B. Thermocouple.
    • C. Optical pyrometer (disappearing filament type)
    • D. Radiation pyrometer
      • Discuss
    • 4. What is the Laplace transform of impulse input having magnitude 'X'?

    • Options
    • A. X
    • B. X2
    • C. 1/X
    • D. 1
      • Discuss
    • 5. Maximum differential pressure in liquid manometer is __________ psi.

    • Options
    • A. 20
    • B. 30
    • C. 40
    • D. 50
      • Discuss
    • 6. Non-metallic diaphragm used as pressure sensor in instruments is generally made of

    • Options
    • A. teflon
    • B. synthetic rubber
    • C. bakelite
    • D. thick paper
      • Discuss
    • 7. Which of the following thermocouples has the widest temperature measurement range?

    • Options
    • A. Iron-constantan
    • B. Chromel-alumel
    • C. Copper-constantan
    • D. Platinum-platinum/rhodium
      • Discuss
    • 8. Which of the following is not a variable area flow meter?

    • Options
    • A. Piston type meter
    • B. Rotameter
    • C. Magnetic flow meter
    • D. Orifice and tapered plug meter
      • Discuss
    • 9. With increase in temperature, the electrical conductivity of the platinum used in the resistance thermometer

    • Options
    • A. increases
    • B. decreases
    • C. remains constant
    • D. increases exponentially
      • Discuss
    • 10. The unit of 'time constant' of a system is the same as that of

    • Options
    • A. velocity
    • B. time
    • C. (time)-1
    • D. none of these
      • Discuss

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