Working principle of bimetallic thermometers is difference in linear co-efficient of thermal expansion of two strips of different metals welded together. Which of the following has the maximum thermal co-efficient of linear expansion?

Process Control and Instrumentation
Working principle of bimetallic thermometers is difference in linear co-efficient of thermal expansion of two strips of different metals welded together. Which of the following has the maximum thermal co-efficient of linear expansion?

Nickel

Brass

Invar

Chromel

Nickel

Brass

Invar

Chromel

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Process Control and Instrumentation
E.m.f. generated by thermocouples is of the order of

Kilo volts

Microvolts

Millivolts

Volts

Kilo volts

Microvolts

Millivolts

Volts

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Process Control and Instrumentation
Typical specifications for design stipulates the gain margin and phase margin to be respectively

> 1.7 and > 30°

> 1.7 and < 30°

< 1.7 and > 30°

< 1.7 and < 30°

> 1.7 and > 30°

> 1.7 and < 30°

< 1.7 and > 30°

< 1.7 and < 30°

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Process Control and Instrumentation
Routh test

Can not determine as to how many roots of the characteristics equation have positive real roots

Criterion is not applicable to systems with polynomial characteristic equation

Criterion provides information about the actual location of roots

Cannot be used to test the stability of a control system containing transportation lag

Can not determine as to how many roots of the characteristics equation have positive real roots

Criterion is not applicable to systems with polynomial characteristic equation

Criterion provides information about the actual location of roots

Cannot be used to test the stability of a control system containing transportation lag

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

1/(Ts + 1)

1/Ts

None of these

S/(Ts + 1)

1/(Ts + 1)

1/Ts

None of these

S/(Ts + 1)

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Process Control and Instrumentation
Psychrometer determines the

Hygroscopic nature of solids

Water of crystallisation

Moisture content of solids

Humidity of gases

Hygroscopic nature of solids

Water of crystallisation

Moisture content of solids

Humidity of gases

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Process Control and Instrumentation

Process Control and Instrumentation Working principle of bimetallic thermometers is difference in linear co-efficient of thermal expansion of two strips of different metals welded together. Which of the following has the maximum thermal co-efficient of linear expansion?

Process Control and Instrumentation E.m.f. generated by thermocouples is of the order of

Process Control and Instrumentation Typical specifications for design stipulates the gain margin and phase margin to be respectively

Process Control and Instrumentation Routh test

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

Process Control and Instrumentation Psychrometer determines the

Process Control and Instrumentation
Working principle of bimetallic thermometers is difference in linear co-efficient of thermal expansion of two strips of different metals welded together. Which of the following has the maximum thermal co-efficient of linear expansion?

Process Control and Instrumentation
E.m.f. generated by thermocouples is of the order of

Process Control and Instrumentation
Typical specifications for design stipulates the gain margin and phase margin to be respectively

Process Control and Instrumentation
Routh test

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

Process Control and Instrumentation
Psychrometer determines the