Latest Process Control And Instrumentation MCQs – New Chemical Engineering MCQs
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Latest Chemical Engineering MCQs
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Latest Process Control And Instrumentation Mcqs
The most occurred mcqs of Process Control And Instrumentation in past papers. Past papers of Mcqs. Past papers of Process Control And Instrumentation Mcqs . Mcqs are the necessary part of any competitive / job related exams. The Mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related Process Control And Instrumentation Mcqs. The Important series of Process Control And Instrumentation Mcqs are given below:
Which of the following relates the absorption & evolution of heat at the junctions of a thermocouple to the current flow in the circuit ?
A. Joule heating effect
B. Peltier effect
C. Seebeck effect
D. Thomson effect
Small furnace draught is accurately measured by an inclined tube manometer, in which the manometric liquid used most commonly is __________________?
A. Carbon tetrachloride
B. Water
C. Paraffin
D. Ethylene glycol
Thermodynamics Mcqs
______________ is undesirable in thermocouples used in industries ?
A. Linear relation of emf to temperature
B. Oxidation resistance
C. Corrosion resistance
D. Non-linear relation of emf to temperature
Which is the most suitable instrument for measuring pressure below 3 microns ?
A. Alphatron
B. Mcleod gauge
C. Ionisation gauge
D. Bourdon gauge
A magnetic flowmeter is_________________?
A. Based on the linear relationship between the fluid flow rate and the induced voltage
B. Capable of measuring the flow rate of slurries and electrolytes
C. Based on the principle of Faraday’s law
D. All A., B. and C.
Which of the following flow-metering instruments is an areameter ?
A. Pitot tube
B. Rotameter
C. Venturimeter
D. Hot wire anemometer
Which of the following controllers has maximum offset ?
A. P-controller
B. P-D controller
C. P-I controller
D. P-I-D controller
Working principle of radiation pyrometer is based on the __________________?
A. Kirchoff’s law
B. Wien’s law
C. Stefan Boltzmann law
D. Seebeck effect
Presence of a small amount of water in the organic systems can be determined by the _____________ method?
A. Polarimetry
B. Electrical conductivity
C. Emission spectroscopy
D. Dielectric constant end loss factor
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 ?
A. 0.80 mv
B. 3.26 mv
C. 2.46 mv
D. 2.43 mv
The second order system with the transfer function 4/(s2 + 2s + 4) has a damping ratio of ___________________?
A. 1.0
B. 0.5
C. 2.0
D. 4.0
A mercury thermometer cannot be used to measure the temperature below the freezing point of mercury, which is _____________ °C?
A. -38.9
B. -60.9
C. -11.9
D. -80.9
_______________ thermometer cannot measure sub-zero (< 0° C) temperature ?
A. Vapor pressure
B. Bimetallic
C. Mercury in glass
D. Resistance
Process Control And Instrumentation Mcqs
The function of a transducer is to _______________ ?
A. Amplify the input signal
B. Modify the input signal
C. Convert the primary signal into a more useful quantity, usually an electric impulse
D. Codify/decodify the input signal
Routh stability method uses ______________ loop transfer function?
A. Open
B. Closed
C. Either of the above
D. Neither of the above
Magnetic flowmeters are generally not used for the velocity/flow measurement of hydrocarbons due to their ?
A. High viscosity index
B. Low electrical conductivity
C. Low thermal conductivity
D. Low flash point
Instrumentation in a plant offers the advantage of_______________?
A. Greater safety of operation
B. Greater operation economy
C. Better quality of product
D. All A., B. and C.
Typical specifications for design stipulates the gain margin and phase margin to be respectively__________________?
A. > 1.7 and > 30°
B. < 1.7 and 1.7 and < 30°
C. 30°
Which of the following is an undesirable dynamic characteristic of an instrument ?
A. Dead zone
B. Reproducibility
C. Time lag
D. Static error
Phase lag of the frequency response of a second order system to a sinusoidal forcing function______________?
A. Is 90° at the most
B. Is 30°
C. Approaches 180° asymptotically
D. Is 120°