PROCESS CONTROL AND INSTRUMENTATION QUIZ

Measurement of sub-zero Celcius temperature in industry is done most commonly by

Gas thermometers

Bi-metallic thermometers

Thermocouples

Resistance thermometers

TRUE ANSWER : ?
YOUR ANSWER : ?

Dilute wine was used as a thermometric liquid initially to develop temperature scale. First emperical temperature scale developed was the __________ scale.

Centigrade

Kelvin

Reaumer

Fahrenheit

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is an undesirable dynamic characteristic of an instrument?

Reproducibility

Dead zone

Time lag

Static error

TRUE ANSWER : ?
YOUR ANSWER : ?

Turbine flow meters are suitable for

Both B and C

Very limited flow ranges

Cryogenic flow measurements

Aerospace and in air borne applications

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not the triple point of water?

32°F

32°R

492°R

273°K

TRUE ANSWER : ?
YOUR ANSWER : ?

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

4

3

2

1

TRUE ANSWER : ?
YOUR ANSWER : ?

Nichol's chart deals with

Closed loop values vs. open loop values

Frequency response values of controllers

R. vs. phase lag of second order

R. vs. phase lag of first order

TRUE ANSWER : ?
YOUR ANSWER : ?

Pick out the first order system from among the following.

Damped vibrator

Mercury in glass thermometer kept in boiling water

Interacting system of two tanks in series

Non-interacting system of two tanks in series

TRUE ANSWER : ?
YOUR ANSWER : ?

All the thermocouples used for temperature measurement use dissimilar metal

Wires

Strips

Beads

Bars

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YOUR ANSWER : ?

Flow rate of a river is measured by a/an

Vane meter

Pitot tube

Open weir

Kennison nozzle

TRUE ANSWER : ?
YOUR ANSWER : ?

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