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?

Brass

Nickel

Chromel

Invar

Brass

Nickel

Chromel

Invar

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Process Control and Instrumentation
Process degree of freedom indicates __________ number of controllers to be used.

The maximum

The minimum

Both maximum and the minimum

Nothing about the

The maximum

The minimum

Both maximum and the minimum

Nothing about the

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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

High thermal conductivity

Small specific heat

Large area but small mass

All of these

High thermal conductivity

Small specific heat

Large area but small mass

All of these

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Process Control and Instrumentation
The characteristic equation for the control system with a closed loop transfer function G₁/1 + G₂ is given by 1 + G₂ = 0. The characteristic equation for the control system

All of these

Depends only upon the open loop transfer function

Is the same for set point or load changes

Determines its stability

All of these

Depends only upon the open loop transfer function

Is the same for set point or load changes

Determines its stability

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Process Control and Instrumentation
The maximum service temperature for fibre glass used as thermocouple wire insulation material is __________ °C.

750

500

250

1000

750

500

250

1000

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Process Control and Instrumentation
Emf generated in a thermocouple depends on the temperature

Of cold junction only

Difference between cold junction and atmospheric temperature

Of hot junction only

Difference between hot and cold junctions

Of cold junction only

Difference between cold junction and atmospheric temperature

Of hot junction only

Difference between hot and cold junctions

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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 Process degree of freedom indicates __________ number of controllers to be used.

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

Process Control and Instrumentation The characteristic equation for the control system with a closed loop transfer function G₁/1 + G₂ is given by 1 + G₂ = 0. The characteristic equation for the control system

Process Control and Instrumentation The maximum service temperature for fibre glass used as thermocouple wire insulation material is __________ °C.

Process Control and Instrumentation Emf generated in a thermocouple depends on the temperature

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
Process degree of freedom indicates __________ number of controllers to be used.

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

Process Control and Instrumentation
The characteristic equation for the control system with a closed loop transfer function G₁/1 + G₂ is given by 1 + G₂ = 0. The characteristic equation for the control system

Process Control and Instrumentation
The maximum service temperature for fibre glass used as thermocouple wire insulation material is __________ °C.

Process Control and Instrumentation
Emf generated in a thermocouple depends on the temperature