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Process Control and Instrumentation

Process Control and Instrumentation
In an exothermic chemical reactor, the manipulated variable is the flow rate of

None of these
Coolant
Product
Reactants

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Process Control and Instrumentation
Mercury thermometer is commonly used for low temperature measruement. The freezing point and boiling point of mercury are respectively __________ °C.

- 79 and 395
- 10 and 425
- 39 and 350
- 51 and 439

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Process Control and Instrumentation
A system with transfer function (2S/4S) + 1 is of __________ order.

3rd
Zero
1st
2nd

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Process Control and Instrumentation
The root locus plot of the roots of the characteristics equation of a closed loop system having the open loop transfer function K(s + 1)/2(2s + 1)(3s + 1) will have a definite number of loci for variation of K from 0 to ∞. The number of loci is

1
3
4
2

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Process Control and Instrumentation
Concentration of sugar solution can be determined by the

Oscillometry
Emission spectroscopy
Polarimetry
Flame photometry

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Process Control and Instrumentation
Which of the following filled system expansion thermometers has the lowest positive temperature measurement capability?

Mercury in glass thermometer
Alcohol in glass thermometer
Nitrogen in steel thermometer
Fused metal (Na or K) in steel thermometer

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