Related Mcqs:

1. Dilute wine was used as a thermometric liquid initially to develop temperature scale. First empirical temperature scale developed was the _____________ scale?

   A. Kelvin
   B. Centigrade
   C. Fahrenheit
   D. Reaumer

2. Measurement of sub-zero Celsius temperature in industry is done most commonly by __________________?

   A. Thermocouples
   B. Resistance thermometers
   C. Gas thermometers
   D. Bi-metallic thermometers

3. Normal mercury thermometer can be used to measure a temperature of about 300°C. However, its maximum temperature measurement range can be increased upto about 500°C by__________________?

   A. Filling nitrogen under pressure in the stem
   B. Increasing the diameter of the tube
   C. Using steel tube in place of glass tube
   D. Accounting for the tube expansion

4. Water is flowing through a series of four tanks and getting heated as shown in figure. It is desired to design a cascade control scheme for controlling the temperature of water leaving the tank 4 as there is a disturbance in the temperature of a second stream entering the tank 2. Select the best place to take the secondary measurement for the second loop?

   A. Tank 1
   B. Tank 2
   C. Tank 3
   D. Tank 4

5. Water is entering a storage tank at a temperature T0 and flow rate Q0 and leaving at a flow rate Q and temperature T. There are negligible heat losses in the tank. The area of cross-section of the tank is A0. The model that describes the dynamic variation of temperature of water in the tank with time is given as________________?

   A. Q0(T0 – T) = Ac . h (dT/dt)
   B. Q0T0 – QT = Ac . h (dT/dt)
   C. Q(T0 – T) = Ac . h (dT/dt)
   D. Q(T0 – T) = Ac . (dTH/dt)

6. Platinum resistance thermometer is the international standard for temperature measurement between __________________?

   A. Triple point of hydrogen and freezing point of antimony
   B. 13.81°K to 903.9°K
   C. Both A. and B.
   D. Neither A. nor B.

7. Helium gas constant volume thermometer is suitable for the measurement of a temperature of ______________ °C?

   A. < 100
   B. < 0
   C. > 0
   D. > 800

8. Out of the following temperature measuring instruments, the measurement accuracy will be minimum for the ________________?

   A. Mercury in glass thermometer
   B. Optical pyrometer
   C. Iron-constantan thermocouple
   D. Alcohol filled thermometer

9. 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

10. Accurate temperature measurement performance of a radiation pyrometer cannot be affected, if the ?

    A. Enhancement or attenuation of radiation occurs in the sighting path
    B. Object and surrounding are at almost the same temperature
    C. Object has varying emissivity
    D. Object is transparent