Process Control and Instrumentation

What is the dynamic error in a critically damped second order instrument for a ramp input (At) ?

Byadmin March 5, 2019August 24, 2021

What is the dynamic error in a critically damped second order instrument for a ramp input (At) ?

A. 0.5 AT
B. 2 AT
C. √(AT)
D. 1.5 AT

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 ?

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 ?

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

Read More 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

Specific gravity of a liquid cannot be measured by a/an __________________?

Specific gravity of a liquid cannot be measured by a/an __________________?

A. Anemometer
B. Specific gravity bottle
C. Pycnometer
D. Hydrometer

Read More Specific gravity of a liquid cannot be measured by a/an __________________?
Process Control and Instrumentation

Reference points i.e., ice point and steam point in Reaumer temperature scale are respectively_________________?

Reference points i.e., ice point and steam point in Reaumer temperature scale are respectively_________________?

A. – 273° & 80°
B. 0° & 80°
C. 32° & 460°
D. 32° & 80°

Read More Reference points i.e., ice point and steam point in Reaumer temperature scale are respectively_________________?
Process Control and Instrumentation

Flame photometry is used for the determination of compositional analysis of_______________?

Flame photometry is used for the determination of compositional analysis of_______________?

A. Solids
B. Alkali metals
C. Natural gas
D. Isotopes

Read More Flame photometry is used for the determination of compositional analysis of_______________?
Process Control and Instrumentation

Typical specifications for design stipulates the gain margin and phase margin to be respectively__________________?

Typical specifications for design stipulates the gain margin and phase margin to be respectively__________________?

A. > 1.7 and > 30°
B. 30°
C. < 1.7 and 1.7 and < 30°

Read More Typical specifications for design stipulates the gain margin and phase margin to be respectively__________________?
Process Control and Instrumentation

The time taken for a radioactive element to reduce to 50% of its original weight is _____________ years, if its half life period is 12 years?

The time taken for a radioactive element to reduce to 50% of its original weight is _____________ years, if its half life period is 12 years?

A. 24
B. 18
C. 6
D. 36

Read More The time taken for a radioactive element to reduce to 50% of its original weight is _____________ years, if its half life period is 12 years?