Process Control & Instrumentation Mcqs for Chemical


Q.  Zirconia probe is used for the continuous measurement of ______________ flue gases going out of the furnace?

a. Oxygen in
b. Carbon dioxide in
c. Carbon monoxide in
d. Temperature of


ANSWER: See Answer
 
No explanation is available for this question!
MCQs:  Which is the most suitable instrument for measuring pressure below 3 microns ?
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MCQs:  A magnetic flowmeter is_________________?
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MCQs:  Which of the following flow-metering instruments is an areameter ?
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MCQs:  Which of the following controllers has maximum offset ?
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MCQs:  Working principle of radiation pyrometer is based on the __________________?
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MCQs:  Presence of a small amount of water in the organic systems can be determined by the _____________ method?
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MCQs:  The calibration data of a thermocouple with its cold junction at 0°C are given below. The hot junction of the thermocouple is placed in a bath at 80°C, while its cold junction is at 20°C. What is the emf of thermocouple ?
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MCQs:  The second order system with the transfer function 4/(s2 + 2s + 4) has a damping ratio of ___________________?
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MCQs:  A mercury thermometer cannot be used to measure the temperature below the freezing point of mercury, which is _____________ °C?
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MCQs:  _______________ thermometer cannot measure sub-zero (< 0° C) temperature ?
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MCQs:  The function of a transducer is to _______________ ?
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MCQs:  Routh stability method uses ______________ loop transfer function?
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MCQs:  Magnetic flowmeters are generally not used for the velocity/flow measurement of hydrocarbons due to their ?
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MCQs:  Instrumentation in a plant offers the advantage of_______________?
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MCQs:  Typical specifications for design stipulates the gain margin and phase margin to be respectively__________________?
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MCQs:  Which of the following is an undesirable dynamic characteristic of an instrument ?
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MCQs:  Phase lag of the frequency response of a second order system to a sinusoidal forcing function______________?
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MCQs:  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________________?
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MCQs:  Specific conductance is defined as the reciprocal of resistance in ohms of 1c.c. of liquid at a specified temperature. Its value for distilled water is about ______________ micro mho/cm3?
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MCQs:  Sub-zero temperature (< 0°C) can be measured by a constant volume gas thermometer employing ?
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