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Chemical Engineering - Process Control and Instrumentation

Exercise : Process Control and Instrumentation - Section 1
6.
Pick out the wrong statement.
O2, NO and NO2 exhibit paramagnetic properties as a result of unpaired electrons.
CO2 is the strongest paramagnetic gas.
Paramagnetic susceptibility of gases decreases with temperature.
Paramagnetic susceptibility of gases permits the measurement of their concentration.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
The __________ of a vapor pressure thermometer is a functioning element.
pointer
bourdon tube
bulb
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
A negative gain margin expressed in decibels means a/an __________ system.
stable
unstable
critically damped
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
Thermistor, which has high temperature co-efficient of resistivity, is used as the sensing element in resistance thermometer. It is a/an
insulator
conductor
solid semi-conductor
liquid semi-conductor
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
Flapper nozzle is used in a/an __________ controller.
electronic
hydraulic
pneumatic
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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