Chemical Engineering - Process Control and Instrumentation

26. 

Gas analysis is commonly done using the

A. thermal conductivity cell
B. X-ray diffraction
C. mass spectrometer
D. emission spectrometer

Answer: Option A

Explanation:

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27. 

The open loop transfer function of a control system is . This represents

A. a first order system.
B. dead time system.
C. a first order time lag.
D. a second order system.

Answer: Option A

Explanation:

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28. 

Thermal conductivity measurement is used for the determination of

A. O2 percentage in the flue gas.
B. specific gravity of petrofuels.
C. composition of an alloy.
D. CO2 percentage in the flue gas.

Answer: Option D

Explanation:

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29. 

Presence of a small amount of water in the organic systems can be determined by the __________ method.

A. electrical conductivity
B. polarimetry
C. emission spectroscopy
D. dielectric constant end loss factor

Answer: Option D

Explanation:

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30. 

The transfer function of a pure dead time system with dead time τd is

A. 1/(τds + 1)
B. τds + 1
C. ess
D. eτds

Answer: Option C

Explanation:

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