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Process Control and Instrumentation

Process Control and Instrumentation
In a single tank system, the transfer function of level to inlet flow rate is

R/(TS + 1)
1/TS
R/TS
L(TS + l)

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Process Control and Instrumentation
A negative gain margin expressed in decibels means a/an __________ system.

None of these
Critically damped
Stable
Unstable

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Process Control and Instrumentation
Continuous flue gas analyser makes use of paramagnetic properties of some of its constituents, which move towards the strongest part of the magnetic field thus displacing diamagnetic gases. Which of the following gases is diamagnetic?

NO₂
O₂
CO₂
NO

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Process Control and Instrumentation
A control system has the following transfer function F(s) = (s - 1)(s + 1)/s(s - 2)(s + 4)The initial value of the corresponding time function is

1
43838
-1
44020

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Process Control and Instrumentation
Relationship between absorption/evolution of heat at the thermocouple junctions and the current flow in the circuit is given by __________ effect.

Thomson
None of these
Seebeck
Peltier

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Process Control and Instrumentation
__________ is an example of distributed parameter system

On-off controller
None of these
CSTR
Tubular reactor

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