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Dear candidates you will find MCQ questions of Process Control And Instrumentation here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.

Q. 1) Phase lag of the frequency response of a second order system to a sinusoidal forcing function

(A) Is 30°
(B) Is 90° at the most
(C) Approaches 180° asymptotically
(D) Is 120°
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Q. 2) Which of the following is not classified as a thermo electric pyrometer?

(A) Resistance thermometer
(B) Thermocouple
(C) Radiation pyrometer
(D) Optical pyrometer (disappearing filament type)
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Q. 3) The temperature of tempering oil baths maintained at 400°C during heat treatment of steel is measured by a/an __________ thermocouple. 

(A) Chromel-alumel
(B) Iron-constantan
(C) Platinum-platinum/rhodium
(D) None of these
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Q. 4) __________ are analysed using a polarograph.

(A) Isotonic solutions
(B) Solids
(C) Liquids
(D) Gases
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Q. 5) __________ temperature scale assigns 0° to the 'ice point' and 80° to the 'steam point'. 

(A) Celcius
(B) Rankine
(C) Reumur
(D) Farenhite
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Q. 6) Operating range of a temperature measuring instrument is 800 to 1600°C. It could be a/an __________ pyrometer. 

(A) Radiation
(B) Optical
(C) Photoelectric
(D) None of these
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Q. 7) Flow rate measurement of hostile acids and alkalis can be most suitably done by a/an

(A) Venturimeter
(B) Orificemeter
(C) Magnetic flow meter
(D) Hot wire anemometer
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Q. 8) Response of a linear control system for a change in set point is called

(A) Frequency response
(B) Transient response
(C) Servo problem
(D) Regulator problem
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Q. 9) Nickel percentage in invar which is an iron-nickel alloy, and is used as a thermocouple material is

(A) 12
(B) 36
(C) 54
(D) 68
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Q. 10) Which of the following measurements can be made by the measurement of emf?

(A) PH value
(B) Degree of hydrolysis
(C) Composition of complex ions
(D) All of the above
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