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 ?

Byadmin March 5, 2019August 24, 2021

A. Nickel
B. Brass
C. Chromel
D. Invar

Process Control and Instrumentation

A non-linear system will have _____________ steady state values?

A non-linear system will have _____________ steady state values?

A. One
B. More than one
C. Two
D. Three

Read More A non-linear system will have _____________ steady state values?
Process Control and Instrumentation

An ideal PID controller has the transfer function [1 + (1/0.55) + 0.25]. The frequency at which the magnitude ratio of the controller is 1, is________________?

An ideal PID controller has the transfer function [1 + (1/0.55) + 0.25]. The frequency at which the magnitude ratio of the controller is 1, is________________?

A. 0.5/0.2
B. 0.2/0.5
C. 0.2 × 0.5
D. 1/√(0.2 × 0.5)

Read More An ideal PID controller has the transfer function [1 + (1/0.55) + 0.25]. The frequency at which the magnitude ratio of the controller is 1, is________________?
Process Control and Instrumentation

Thermocouple in a thermal well behaves as a true ________________?

Thermocouple in a thermal well behaves as a true ________________?

A. First order system
B. Second order system (overdamped)
C. Multiple first order system
D. Second order system (underdamped)

Read More Thermocouple in a thermal well behaves as a true ________________?
Process Control and Instrumentation

Transfer function of transportation lag is___________________?

Transfer function of transportation lag is___________________?

A. eTS
B. e-TS
C. 1/(Ts + 1)
D. None of these

Read More Transfer function of transportation lag is___________________?
Process Control and Instrumentation

Working principle of mercury in glass thermometer is based on the ______________ of mercury with increase in temperature?

Working principle of mercury in glass thermometer is based on the ______________ of mercury with increase in temperature?

A. Increase of pressure
B. Increase of thermal conductivity
C. Volumetric expansion
D. Differential linear expansion

Read More Working principle of mercury in glass thermometer is based on the ______________ of mercury with increase in temperature?
Process Control and Instrumentation

Liquid flow rate in an open channel cannot be measured by a/an __________________?

Liquid flow rate in an open channel cannot be measured by a/an __________________?

A. Orifice meter
B. Cipolletti weir
C. Rectangular weir
D. V-notch

Read More Liquid flow rate in an open channel cannot be measured by a/an __________________?

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