Process Control & Instrumentation Mcqs for Chemical

Q.  Non-metallic diaphragm used as pressure sensor in instruments is generally made of__________________?

a. Teflon
b. Synthetic rubber
c. Bakelite
d. Thick paper


ANSWER: See Answer
 
No explanation is available for this question!
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MCQs:  According to Bode stability criterion, a system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at frequency for which phase lag is_________________?
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MCQs:  Mcleod gauge measures the _____________ pressure?
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MCQs:  Continuous measurement of moisture content of paper in paper industry is done by measuring the_________________?
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MCQs:  Liquid column manometers are used for measuring the pressure ______________ kgf/cm2?
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MCQs:  Which is the strongest paramagnetic gas ?
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MCQs:  Maximum differential pressure in liquid manometer is ______________ psi?
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MCQs:  Which of the following instruments is not used for measuring sub-zero (<0°) temperatures ?
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MCQs:  Which of the following cannot measure a temperature of 1600°C ?
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MCQs:  In a second order under damped system, the_________________?
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MCQs:  “A control system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at the crossover frequency.” This is _______________ criterion?
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MCQs:  A typical example of a physical system with under damped characteristic is a____________________?
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MCQs:  In a closed loop system, the process to be controlled is an integrating process with transfer function 1/2s. The controller proposed to be used in an integral controller with transfer function 1/T1s. When a step change in set point is applied to such a closed loop system, the controlled variable will exhibit__________________?
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MCQs:  Working principle of mercury in glass thermometer is__________________?
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MCQs:  Which of the following filled system expansion thermometers has the lowest positive temperature measurement capability ?
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MCQs:  The root locus plot of the roots of the characteristics equation of a closed loop system having the open loop transfer function K (s + 1)/[2 (2s + 1) (3s + 1)] will have a definite number of loci for variation of K from 0 to ∞. The number of loci is_______________?
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MCQs:  Water is entering a storage tank at a temperature T0 and flow rate Q0 and leaving at a flow rate Q and temperature T. There are negligible heat losses in the tank. The area of cross-section of the tank is A0. The model that describes the dynamic variation of temperature of water in the tank with time is given as________________?
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MCQs:  The transfer function for a P-D controller is________________?
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MCQs:  The time constant of a unity gain, first order plus time delay process is 5 min. If the phase lag at a frequency of 0.2 rad/min is 60°, then the dead time (in minutes) is________________?
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MCQs:  Dead zone is the__________________?
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MCQs:  All the thermocouples used for temperature measurement use dissimilar metal ________________?
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