Related Mcqs:

1. 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

2. To increase the speed of response of a pressure spring liquid or gas expansion thermometer, the clearance space between the thermometer bulb and the thermal well should not be filled with ________________?

   A. Air
   B. A metal powder or graphite
   C. Oil
   D. Mercury

3. Vapour actuated pressure spring thermometer does not require ambient temperature compensation. Ambient temperature compensation is provided in gas or liquid expansion pressure spring thermometer by__________________?

   A. Making the volume of thermometer bulb as large as conveniently possible
   B. Reducing the volume of the capillary to a minimum
   C. Reducing the volume of the receiving element to a minimum
   D. All A , B & C.

4. 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 ?

   A. Water
   B. Mercury
   C. Methyl alcohol
   D. Carbon-tetrachloride

5. For increased speed of response of an expansion pressure spring thermometer, the thermometer bulb should have a__________________?

   A. Large area but small mass
   B. High thermal conductivity
   C. Small specific heat
   D. All A , B & C

6. Ordinary mercury in glass thermometer is used for measuring temperature upto 120°C. However, for measuring higher temperature upto __________ °C, thermometer is made by filling nitrogen under pressure above the mercury, which stops the evaporation of mercury and reduces the chance of broken thread of mercury?

   A. 250
   B. 350
   C. 550
   D. 700

7. 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

8. A bimetallic thermometer as compared to industrial mercury in glass thermometer has almost the same_________________?

   A. Temperature measuring range (- 40°C to 450°C)
   B. Accuracy (± 1% of span)
   C. Speed of response
   D. All a, b & c

9. Radiation thermometer cannot measure the temperature ___________________?

   A. Inside a pressure vessel
   B. Of an object without coming in contact with it
   C. Of liquid oxygen
   D. Of moving objects at high temperature

10. A constant volume gas thermometer employing ______________ is used to measure sub-zero (i.e., < 0°C) temperature?

    A. Helium
    B. Hydrogen
    C. Nitrogen
    D. None of these