Engineering :: Instrumentation and Process Control

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21.

Bimetallic thermometers are used to measure the temperature in the range of

A.	?20? to 1600?C	B.	0? to 400?C
C.	60? to 600?C	D.	800? to 1800?C

22.

Vapour pressure thermometers are used to measure the temperature in the range of

A.	?20? to 1600?C	B.	300? to 1100?C
C.	800? to 2000?C	D.	?20? to 300?C

23.

Iron-constantan thermocouple is used to measure the temperature in the range of

A.	?20? to 1600?C	B.	300? to 1100?C
C.	0? to 600?C	D.	600? to 1600?C

24.

Pt/Pt-13% Rh thermocouple is used to measure the temperature in the range of

A.	0? to 600?C	B.	600? to 1600?C
C.	0? to 400?C	D.	0? to 2000?C

25.

Radiation pyrometers are used to measure the temperature in the range of

A.	800? to 2000?C	B.	100? to 600?C
C.	300? to 1100?C	D.	0? to 400?C

26.

A constant-volume gas thermometer employing hydrogen gas is used to measure the temperatures

A.	less than 0?C	B.	between 0?C and 100?C
C.	greater than 100?C

27.

A constant-volume gas thermometer employing helium is used to measure temperatures

A.	less than 0?C	B.	between 0?C and 100?C
C.	greater than 100?C

28.

A constant-volume gas thermometer employing nitrogen is used to measure temperatures

A.	less than 0?C	B.	between 0?C and 100?C
C.	greater than 100?C

29.

Which of the following is the most suitable to measure a temperature of -250?C?

A.	Constant-volume helium thermometer	B.	Paltinum resistance thermometer
C.	Radiation pyrometer	D.	Ordinary mercury-in-glass themometer

30.

Which of the following is most suitable to measure a temperature of 2000?C?

A.	Ordinary mercury-in-glass thermometer	B.	Platinum resistance thermometer
C.	Radiation pyrometer	D.	Constant-volume hydrogen thermometer.