GATE-CH-1988-8-a-i-ctrl-2mark

Match the following:

• A. Mercury-in-glass thermometer

Answer 1IV. Wien's lawII. Cubical expansion of liquidsI. Affinity of different constituents to an adsorbentIII. Faraday's law

• B. Gas chromatograph

Answer 2IV. Wien's lawII. Cubical expansion of liquidsI. Affinity of different constituents to an adsorbentIII. Faraday's law

• C. Optical pyrometer

Answer 3IV. Wien's lawII. Cubical expansion of liquidsI. Affinity of different constituents to an adsorbentIII. Faraday's law

• D. Magneto-hydrodynamic flow meter

Answer 4IV. Wien's lawII. Cubical expansion of liquidsI. Affinity of different constituents to an adsorbentIII. Faraday's law

GATE-CH-1988-8-a-ii-ctrl-2mark

Match the following:

• A. Carbon dioxide composition in a flue gas

Answer 1II. Ultrasonic detectorIV. pH meterIII. Thermal conductivity gas analyserI. Paramagnetic gas analyser

• B. Acid content in a waste stream

Answer 2II. Ultrasonic detectorIV. pH meterIII. Thermal conductivity gas analyserI. Paramagnetic gas analyser

• C. Level of solids in a bin

Answer 3II. Ultrasonic detectorIV. pH meterIII. Thermal conductivity gas analyserI. Paramagnetic gas analyser

• D. Concentration of oxygen in air blown to a fermentor

Answer 4II. Ultrasonic detectorIV. pH meterIII. Thermal conductivity gas analyserI. Paramagnetic gas analyser

GATE-CH-1988-8-b-i-ctrl-0pt5mark

The cross section of a Bourdon tube is ––––- .

• circular

• square

• rectangular

• elliptical

GATE-CH-1988-8-b-iii-ctrl-0pt5mark

An inclined tube manometer is ––––- sensitive than a U tube manometer.

• more

• less

• equal

GATE-CH-1988-8-b-iv-ctrl-0pt5mark

The ––––- type thermometer is not subject to ambient temperature error.

• liquid expansion

• mercury expansion

• vapor pressure

• gas expansion

GATE-CH-1989-8-i-c-ctrl-2mark

For microprocessor based automatic process control, name the most suitable instrument for temperature measurement. If more than one is suitable, name them all.

• Gas thermometer

• Mercury filled thermometer

• Resistance thermometer

• Thermocouple

GATE-CH-1995-1-s-ctrl-1mark

Gas chromatography is used for measurement of

• temperature

• pressure

• concentration

• flow rate

GATE-CH-2003-22-ctrl-1mark

Match the measured process variables with the list of measuring devices given below:

Measured process variables	Measuring devices
P. Temperature	1. Bourdon tube element
Q .Pressure	2. Orifice plates
R. Flow	3. Infrared analyzer
S. Liquid level	4. Displacer devices
T. Composition	5. Pyrometer

• P-5, Q-1, R-2, S-4, T-3

• P-3, Q-1, R-4, S-2, T-5

• P-1, Q-3, R-4, S-2, T-5

• P-3, Q-1, R-2, S-4, T-5

GATE-CH-2009-16-ctrl-1mark

Which ONE of the following sensors is used for the measurement of temperature in a combustion process (>1800^oC)?

• Type J thermocouple

• Thermistor

• Resistance temperature detector

• Pyrometer

GATE-CH-2011-7-ctrl-1mark

Match the process parameters in Group I, with the measuring instruments in Group II.

GROUP I	GROUP II
P. Flame temperature	I. Thermocouple
Q. Composition of LPG	II. Radiation pyrometer
R. Liquid air temperature	III. Gas chromatograph

• P-III Q-I, R-II
• P-I, Q-III, R-II
• P-II, Q-III, R-I
• P-II, Q-I, R-III

GATE-CH-2013-25-ctrl-1mark

Match the following.

Group 1	Group 2
(P) Viscosity	(1) Pyrometer
(Q) Pressure	(2) Hot wire anemometer
(R) Velocity	(3) Rheometer
(S) Temperature	(4) Piezoelectric element

• P-4, Q-3, R-1, S-2
• P-3, Q-4, R-2, S-1
• P-3, Q-4, R-1, S-2
• P-4, Q-3, R-2, S-1

GATE-CH-2016-17-ctrl-1mark

Match the instruments in Group-1 with process variables in Group-2.

Group-1	Group-
P. Conductivity meter	I. Flow
Q. Turbine meter	II. Pressure
R. Piezoresistivity element	III. Composition

• P-II, Q-I, R-III
• P-II, Q-III, R-I
• P-III, Q-II, R-I
• P-III, Q-I, R-II