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.Management Sciences
Category: Process Control and Instrumentation
Temperature of _____________ cannot be measured by an optical or radiation pyrometer?
A. Hot blast (air) from stoves
B. Molten slag flowing out of blast furnace
C. Combustion space in boilers
D. Rotary limestone calcination kiln
Instrumentation in a plant offers the advantage of_______________?
A. Greater safety of operation
B. Better quality of product
C. Greater operation economy
D. All A., B. and C.
Working principle of mercury in glass thermometer is based on the ______________ of mercury with increase in temperature?
A. Increase of pressure
B. Increase of thermal conductivity
C. Volumetric expansion
D. Differential linear expansion
Cascade control means _______________?
A. Feed forward control
B. More than one feed-back loop
C. On-off control
D. One feed-back loop
Minute depression of freezing point of a liquid solvent on addition of a solid solute can be best measured by a________________?
A. Beckman thermometer
B. Dilatometer
C. Mercury thermometer
D. Bimetallic thermometer
Thermistors which have a very high temperature co-efficient of resistivity belong to the class of solid called________________?
A. Dielectrics
B. Insulators
C. Semi conductors
D. Conductors
Continuous measurement of moisture content of paper in paper industry is done by measuring the_________________?
A. Thermal conductivity through the paper
B. Electrical resistance through the paper
C. Magnetic susceptibility
D. None of these
Which of the following is not a mechanical pressure sensing element ?
A. Bellows
B. Diaphragm
C. Bourdon tube
D. U-tube
In second order underdamped system ?
A. Decay ratio = overshoot
B. Decay ratio = (overshoot)2
C. Overshoot increases for increasing damping co-efficient
D. Large damping co-efficient means smaller damping
In a single tank system, the transfer function of level to inlet flow rate is__________________?
A. R/TS
B. R/(TS + 1)
C. 1/TS
D. None of these
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