Process Control and Instrumentation

Measurement of pressure in ammonia reactor is done by __________________?

Byadmin March 5, 2019August 24, 2021

Measurement of pressure in ammonia reactor is done by __________________?

A. Bourdon gauge
B. U-tube manometer
C. Inclined tube manometer
D. Pirani gauge

Process Control and Instrumentation

Dilatometer is used to measure __________________?

Dilatometer is used to measure __________________?

A. Stress
B. Strain
C. Deflection
D. Contraction/expansion due to changes in temperature

Read More Dilatometer is used to measure __________________?
Process Control and Instrumentation

The maximum service temperature for fibre glass used as thermocouple wire insulation material is __________ °C?

The maximum service temperature for fibre glass used as thermocouple wire insulation material is __________ °C?

A. 250
B. 500
C. 750
D. 1000

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

Which of the following is not a second order instrument ?

Which of the following is not a second order instrument ?

A. Mercury in glass thermometer with covering
B. Bare mercury in glass thermometer
C. Pressure gauge with one bellow, two tubes and a tank
D. None of these

Read More Which of the following is not a second order instrument ?
Process Control and Instrumentation

A first order system with unity gain and time constant η is subjected to a sinusoidal input of frequency w = 1/η. The amplitude ratio for this system is______________?

A first order system with unity gain and time constant η is subjected to a sinusoidal input of frequency w = 1/η. The amplitude ratio for this system is______________?

A. 1
B. 0.5
C. 1/√2
D. 0.25

Read More A first order system with unity gain and time constant η is subjected to a sinusoidal input of frequency w = 1/η. The amplitude ratio for this system is______________?
Process Control and Instrumentation

A proportional controller with a gain of Kc is used to control a first order process. The offset will increase, if________________?

A proportional controller with a gain of Kc is used to control a first order process. The offset will increase, if________________?

A. Kc is reduced
B. Kc is increased
C. Integral control action is introduced
D. Derivative control action is introduced

Read More A proportional controller with a gain of Kc is used to control a first order process. The offset will increase, if________________?
Process Control and Instrumentation

Temperature measurement by optical pyrometer is done above ____________ point, which is 1063°C ?

Temperature measurement by optical pyrometer is done above ____________ point, which is 1063°C ?

A. Antimony
B. Gold
C. Silver
D. Nickel

Read More Temperature measurement by optical pyrometer is done above ____________ point, which is 1063°C ?

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