PROCESS CONTROL AND INSTRUMENTATION QUIZ

Liquid column manometers are used for measuring the pressure __________ kgf/cm² .

< 10 (gage)

< atmospheric

> 2(gage)

< 3 (gage)

TRUE ANSWER : ?
YOUR ANSWER : ?

Pressure of 0.0001 absolute psi can be measured by __________ gauge

None of these

Thermocouple

Mcloid

Pirani

TRUE ANSWER : ?
YOUR ANSWER : ?

Psychrometer determines the

Water of crystallisation

Moisture content of solids

Humidity of gases

Hygroscopic nature of solids

TRUE ANSWER : ?
YOUR ANSWER : ?

Specific conductance is defined as the reciprocal of resistance in ohms of 1c.c. of liquid at a specified temperature. Its value for distilled water is about __________ micro mho/cm³.

10

50

1

100

TRUE ANSWER : ?
YOUR ANSWER : ?

Platinum resistance thermometer is the international standard for temperature measurement between

Neither A nor B

Triple point of hydrogen and freezing point of antimony

13.81°K to 903.9°K

Both A and B

TRUE ANSWER : ?
YOUR ANSWER : ?

The maximum service temperature for fibre glass used as thermocouple wire insulation material is __________ °C.

500

750

1000

250

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following can not measure a temperature of 1600°C ?

Platinum resistance thermometer

Thermocouple

Photo-electric pyrometer

Radiation pyrometer

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following temperature measuring instruments need not touch the object whose temperature is being measured?

Filled system thermometer

Radiation/infrared pyrometer

Mercury in glass thermometer

Thermo electric pyrometer

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Diaphragm

Bellows

Bourdon tube

U-tube

TRUE ANSWER : ?
YOUR ANSWER : ?

On-off controllers are normally used for

None of these

Flow rate changes

Temperature changes

Low loads

TRUE ANSWER : ?
YOUR ANSWER : ?

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