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
Correct Answer
Mercury
Process Control and Instrumentation problems
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1. Which of the following does not figure in the list of seven substances selected for international temperature scale?
10. The time constant of a unity gain, first order plus time delay process is 5 min. If the phase lag at a frequency of 0.2 rad/min is 60°, then the dead time (in minutes) is