Related Questions

Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well. The thermal well made of __________ will facilitate the most accurate measurement of the temperature.
A Copper
B Steel
C Aluminium
D Brass
A contractor employed 30 men to do a piece of work in 38 days. After 25 days , he employed 5 men more and the work was finished one day earlier. How many days he would have been behind, if he had not employed additional men?
A 1
B 114
C 134
D 112
Thermal conductivity based continuous flue gas analyser makes use of varying thermal conductivity of the constituents of flue gases. Which of the following constituents of flue gases has the maximum thermal conductivity?
A CO2
B N2
C O2
D CO
The high expansion metal normally used in the bimetallic thermometer is __________ temperature measurement.
A Brass for low
B Nickel alloys for high
C Both A & B
D Aluminium for all
Which of the following filled system expansion thermometers has the lowest positive temperature measurement capability?
A Mercury in glass thermometer
B Alcohol in glass thermometer
C Fused metal (Na or K) in steel thermometer
D Nitrogen in steel thermometer
The temperature at which a gas, when subjected to Joule-Thomson expansion, neither cools or heats up, is termed as the __________ temperature. Above this temperature the gas heats up on throttling and below this the gas cools down.
A Isotactic
B Saturation
C Inversion
D Throttling
Vycor, a widely used material for making 'thermal wells' in temperature measurement, is a
A Cermet
B Glass
C Thermosetting plastic
D Metallic alloy
Thermal wells are used in the temperature measurement to
A Guard against corrosive and oxidising action on thermocouple materials
B Reduce measuring lag
C Increase the fidelity
D Increase the sensitivity
In Meyer's expansion valve, the expansion valve is driven by an eccentric having an angle of advance from
A 50° - 60°
B 60° - 70°
C 70° - 80°
D 80° - 90°
By compounding the expansion of steam in two or more cylinders, the ratio of expansion
A Does not change
B Increases
C Decreases
D None of these

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