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Chemical Engineering - Process Control and Instrumentation

Exercise : Process Control and Instrumentation - Section 3
36.
Measurement of sub-zero Celcius temperature in industry is done most commonly by
thermocouples
resistance thermometers
gas thermometers
bi-metallic thermometers
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
For the block diagram shown below :

The characteristic equation is
τl S (τps + 1) + Kc . Kp (τlS + 1) e-τd s = 0
(τmS + 1) (τpS + 1) + Km . Kp e-τd S = 0
τl S(τm S + 1) (τp S + 1) +Kc . Kp . Km (τl s + 1) e-τdS = 0
(τms + 1) (τp s + 1) + Kc . Kp . Km . e-τdS = 0
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
Use of I-control along with P-control facilitates
elimination of offset
reduction of offset
reduction of stability time
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
Turbine flow meters are suitable for
very limited flow ranges.
cryogenic flow measurements.
aerospace and in air borne applications.
both (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
Liquid discharge from a tank or reservoir can not be measured by
orificemeters
weirs
mouthpieces
notches
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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