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Chemical Engineering - Process Control and Instrumentation

Exercise : Process Control and Instrumentation - Section 7
31.
If response of a control system is to be free of offset and oscillation, the most suitable controller is
proportional controller.
proportional-derivative(PD)controller.
proportional-integral (PI) controller.
proportional integral-derivative (PID) controller.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
Conversion formula for converting amplitude ratio (AR) into decibels is
Decibel = 20 log10 (AR)
Decibel = 20 loge (AR)
Decibel = 20 log10 (AR)0.5
Decibel = 20 loge (AR)0.5
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
A manometer measures the __________ pressure.
atmospheric
absolute
gauge
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
Normal mercury thermometer can be used to measure a temperature of about 300°C. However, its maximum temperature measurement range can be increased upto about 500°C by
filling nitrogen under pressure in the stem.
increasing the diameter of the tube.
using steel tube in place of glass tube.
accounting for the tube expansion.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
Minute depression of freezing point of a liquid solvent on addition of a solid solute can be best measured by a
Beckman thermometer
dilatometer
mercury thermometer
bimetallic thermometer
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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