Discussion
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- Question
Working principle of mercury in glass thermometer is
Options- A. volumetric expansion.
- B. pressure rise with temperature.
- C. linear expansion.
- D. none of these.
- Correct Answer
- volumetric expansion.
- 1. Thermal well made of __________ gives the fastest speed of response, while measuring temperature by thermocouples.
Options- A. steel
- B. vycor (a glass)
- C. nichrome
- D. inconel Discuss
- 2. Continuous measurement of moisture content of paper in paper industry is done by measuring the
Options- A. thermal conductivity through the paper
- B. electrical resistance through the paper
- C. magnetic susceptibility
- D. none of these Discuss
- 3. Which of the following thermocouples has the least temperature measurement range?
Options- A. Copper-constantan
- B. Chromel-alumel
- C. Platinum-platinum/rhodium
- D. Iron-constantan Discuss
- 4. Minute depression of freezing point of a liquid solvent on addition of a solid solute can be best measured by a
Options- A. Beckman thermometer
- B. dilatometer
- C. mercury thermometer
- D. bimetallic thermometer Discuss
- 5. Stroboscope is used for the measurement of
Options- A. rpm of a flywheel
- B. frequency of light
- C. depression of freezing point
- D. liquid level under pressure Discuss
- 6. Composition of natural gas is determined by the
Options- A. Haldane apparatus
- B. mass spectrometer
- C. chromatograph
- D. both (b) and (c) Discuss
- 7. Which is the strongest paramagnetic gas?
Options- A. CO2
- B. O2
- C. NO
- D. NO2 Discuss
- 8. Which of the following thermocouples is incapable of measuring sub-zero (i.e., < 0°C) temperature?
Options- A. Chromel-alumel
- B. Iron-constantan
- C. Platinum-platinum + rhodium
- D. Copper-constantan Discuss
- 9. Phase lag of the sinusoidal response of a first order system is
Options- A. 120°
- B. 30°
- C. 180°
- D. 90° Discuss
- 10. Which of the following can measure temperatures in the range of - 20 to 300°C?
Options- A. Mercury in glass thermometer
- B. Vapor pressure thermometer
- C. Resistance thermometer
- D. None of these. Discuss
Process Control and Instrumentation problems
Search Results
Correct Answer: vycor (a glass)
Correct Answer: electrical resistance through the paper
Correct Answer: Copper-constantan
Correct Answer: Beckman thermometer
Correct Answer: rpm of a flywheel
Correct Answer: both (b) and (c)
Correct Answer: O2
Correct Answer: Platinum-platinum + rhodium
Correct Answer: 90°
Correct Answer: None of these.
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