Resistance of a gas in a vessel is given by (where, P = pressure, V = volume of

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Resistance of a gas in a vessel is given by (where, P = pressure, V = volume of the vessel, n = no. of moles of the gas, R = gas constant)
Options
A.
B.
C.
D.

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Process Control and Instrumentation problems

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1. Relationship between absorption/evolution of heat at the thermocouple junctions and the current flow in the circuit is given by __________ effect.
Options
A. Peltier
B. Thomson
C. Seebeck
D. none of these

2. Thermocouple in a thermal well behaves as a true
Options
A. first order system.
B. second order system (overdamped).
C. multiple first order system.
D. second order system (underdamped).

4. Thermodynamic celcius scale of temperature measurement is
Options
A. defined on the basis of melting point of ice and evaporation temperature of water vapor.
B. defined on the basis of melting point of ice and condensation temperature of water vapor.
C. having an interval of 100� between ice point to steam point.
D. both (b) and (c)

6. According to Bode stability criterian, a system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at frequency for which phase lag is
Options
A. 0�
B. 45�
C. 90�
D. 180�

7. Flow rate of those fluids which are insensitive to changes in their density, viscosity or flow velocity profile can be best measured by a
Options
A. magnetic flowmeter
B. pitot tube
C. flow nozzle type flowmeter
D. turbine flowmeter

10. Pick out the most suitable instrument for measuring temperature in the range of-40 to 425�C.
Options
A. mercury thermometer
B. bimetallic thermometer
C. radiation pyrometer
D. none of these

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