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Question
Which of the following does not figure in the list of seven substances selected for international temperature scale?
Options
A. Ice (F.P) and steam (B.P)
B. Oxygen and sulphur (B.P)
C. Antimony and silver (F.P)
D. Zinc (B.P) and mercury (F.P)
Correct Answer
Zinc (B.P) and mercury (F.P)
Process Control and Instrumentation problems
Search Results
1. An aneroid barometer measures the __________ pressure.
Options
A. atmospheric
B. absolute
C. vacuum
D. gage
Show Answer
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Discuss
Correct Answer: absolute
2. A pyranometer is an instrument used for measuring the
Options
A. beam radiation.
B. global radiation.
C. bright sunshine period.
D. none of these.
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Correct Answer: global radiation.
3. What is the normal percentage of rhodium in platinum + rhodium element used in the thermocouple?
Options
A. 0.1
B. 3
C. 13
D. 29
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Discuss
Correct Answer: 13
4. Reset rate is the another term used for __________ time.
Options
A. dead
B. integral
C. derivative
D. none of these
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Correct Answer: integral
5. The temperature range for which copper resistance thermometer can be used is __________ °C
Options
A. 0 to 150
B. -200 to 150
C. 350 to 750
D. 500 to 900
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Correct Answer: -200 to 150
6. Working principle of mercury in glass thermometer is based on volumetric expansion of mercury with increase in temperature. Which of the following undergoes minimum volumetric expansion for a given temperature change?
Options
A. Water
B. Mercury
C. Methyl alcohal
D. Carbon-tetrachloride
Show Answer
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Discuss
Correct Answer: Mercury
7. Very low pressure is expressed in microns(?), which is equal to __________ mm of Hg coloumn (absolute) at 0°C.
Options
A. 0.0001
B. 0.001
C. 0.01
D. 0.1
Show Answer
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Correct Answer: 0.001
8. Mercury thermometer can be used to measure the temperature upto __________ °C.
Options
A. 100
B. 250
C. 350
D. 750
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Correct Answer: 350
9. Bourdon gauges are used for measuring pressure (kg/cm
2
)
Options
A. < atmospheric
B. > 2 (gauge)
C. < 2 (gauge)
D. > 10 (absolute)
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Correct Answer: > 2 (gauge)
10. All the thermocouples used for temperature measurement use dissimilar metal
Options
A. strips
B. bars
C. wires
D. beads
Show Answer
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Discuss
Correct Answer: wires
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