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Process Control and Instrumentation

Process Control and Instrumentation
The operation of a rotameter is based on

Variable flow area
Rotation of a turbine
Pressure at a stagnation point
Pressure drop across a nozzle

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Process Control and Instrumentation
Alphatron measures pressure __________ microns.

> 3
< 3
< 0.1
< 1

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Process Control and Instrumentation
The unit step response of the transfer function 1/(s² + 2s + 3)

Is overdamped
Has a damped oscillatory characteristics
Is unstable
Has a non-zero slope at the origin

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Process Control and Instrumentation
Emission spectroscopy is used for

Solids and metal analysis
Determination of CO₂ in gases
Determining water purity
NOxdetermination

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Process Control and Instrumentation
The time constant of a first order process with resistance R and capacitance C is

1/RC
RC
R + C
R - C

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Process Control and Instrumentation
The pressure sensing element of elastic type pressure gauge is never made in the form of a

Bellow
Strip
Bourdon tube
Diaphragm

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MORE MCQ ON Process Control and Instrumentation

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