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Process Control and Instrumentation
Comments
Question
The pressure sensing element of elastic type pressure gauge is never made in the form of a
Options
A. bellow
B. diaphragm
C. strip
D. Bourdon tube
Correct Answer
strip
Process Control and Instrumentation problems
Search Results
1. The Laplace transform of exp(at), where a > 0, is defined only for the Laplace parameter, s > a since
Options
A. the function is exponential.
B. the Laplace transform of integral of exp(at) has finite values only for s > a.
C. the Laplace transform integral of exp(at) has initial values only for s > a.
D. the function exp(at) is piece-wise continuous only for s > a.
Show Answer
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Discuss
Correct Answer: the Laplace transform of integral of exp(at) has finite values only for s > a.
2. Photoelectric pyrometers are suitable in the temperature range of __________ °C.
Options
A. 400-1600
B. 800-1600
C. 800-2500
D. 400-1000
Show Answer
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Discuss
Correct Answer: 800-1600
3. Which of the following thermocouples is capable of measuring a temperature of -50°C?
Options
A. Platinum - platinum + rhodium
B. Chromel - alumel
C. Iron-constantan
D. Copper - constantan
Show Answer
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Correct Answer: Platinum - platinum + rhodium
4. A non-linear system will have __________ steady state values.
Options
A. one
B. more than one
C. two
D. three
Show Answer
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Discuss
Correct Answer: more than one
5. Mcleoid gauge is used to measure the
Options
A. point velocity
B. flow rate
C. vacuum
D. pressure
Show Answer
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Discuss
Correct Answer: vacuum
6. A stable system is the one
Options
A. for which the output response is bounded for all bounded input.
B. which exhibits an unbounded response to a bounded input
C. which satisfies the conditions for a servo problem.
D. none of these.
Show Answer
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Correct Answer: for which the output response is bounded for all bounded input.
7. In a feed-back control system
G
and
H
denote open loop and close loop transfer functions respectively. The output-input relationship is
Options
A.
B.
C.
D.
Show Answer
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Discuss
Correct Answer:
8. Bourdon tube is never made of
Options
A. phosphor bronze
B. monel metal
C. stainless steel
D. cast iron
Show Answer
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Discuss
Correct Answer: cast iron
9. Hot wire anemometer is used for the measurement of
Options
A. flow rates of fluids.
B. flow rates of granular solids.
C. very high temperature.
D. thermal conductivity of gases.
Show Answer
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Correct Answer: flow rates of fluids.
10. In a shell and tube heat exchanger, the outlet temperature of heating/cooling fluid is the __________ variable.
Options
A. load
B. manipulated
C. controlled
D. none of these
Show Answer
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Discuss
Correct Answer: controlled
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