PROCESS CONTROL AND INSTRUMENTATION QUIZ

Which of the following is not a mechanical pressure sensing element?

Diaphragm

U-tube

Bellows

Bourdon tube

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Dead zone

Static error

Time lag

Reproducibility

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following thermocouples will give the highest output for the same value of hot and cold junction temperature?

Chromel-constantan

Iron-constantan

All of these

Platinum-platinum + rhodium

TRUE ANSWER : ?
YOUR ANSWER : ?

Flow rate measurement of hostile acids and alkalis can be most suitably done by a/an

Orificemeter

Hot wire anemometer

Venturimeter

Magnetic flow meter

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not a second order instrument?

Mercury in glass thermometer with covering

Bare mercury in glass thermometer

None of these

Pressure gauge with one bellow, two tubes and a tank

TRUE ANSWER : ?
YOUR ANSWER : ?

The time constant of a first order process with resistance R and capacitance C is

1/RC

RC

R - C

R + C

TRUE ANSWER : ?
YOUR ANSWER : ?

The thermal emf-temperature relationship of most thermocouples is

Exponential

Parabolic

Linear

Square root

TRUE ANSWER : ?
YOUR ANSWER : ?

Mass spectrometer is used for the composition analysis of

Solids

Alloys

Isotopes

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Optical activity of a solution can be determined using a

Polarograph

Polarimeter

Refractrometer

Dilatometer

TRUE ANSWER : ?
YOUR ANSWER : ?

Flow rate of sludge is not measured by a/an

Kennison nozzle

Orificemeter

Open weir

Both B & C

TRUE ANSWER : ?
YOUR ANSWER : ?

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