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Process Control and Instrumentation

Process Control and Instrumentation
In a single tank system, the transfer function of __________ to inlet flow rate is 1/TS+1.

Outlet flow rate
Neither A nor B Here
Both A & B Here
Level

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Process Control and Instrumentation
A control system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at the crossover frequency. This is __________ criterion.

None of these
Nyquist
Routh stability
Bode stability

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Process Control and Instrumentation
The deflection of the free end of the bimetallic strips in a bimetallic thermometer with temperature is nearly

Hyperbolic
Linear
Parabolic
Non-linear

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Process Control and Instrumentation
A first order system with unity gain and time constant τ is subjected to a sinusoidal input of frequency w = 1/τ. The amplitude ratio for this system is

0.25
0.5
1
1/√2

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Process Control and Instrumentation
For increased speed of response of an expansion pressure spring thermometer, the thermometer bulb should have a

Large area but small mass
Small specific heat
All of these
High thermal conductivity

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Process Control and Instrumentation
The transfer function of a first order system is

S/(Ts + 1)
1/Ts
None of these
1/(Ts + 1)

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