Sub-zero temperature (< 0°C) can be measured by a constant volume gas thermometer employing ?

Related Mcqs:

1. 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

2. 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.

3. Nitrogen gas constant volume thermometer is suitable for measuring a temperature of _____________ °C?

   A. 0-100
   B. < 0
   C. > 100
   D. > 50

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

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

5. _______________ thermometer cannot measure sub-zero (< 0° C) temperature ?

   A. Mercury in glass
   B. Bimetallic
   C. Vapor pressure
   D. Resistance

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. Range of hydrogen gas constant volume thermometer is _____________ °C?

   A. -10 to 20
   B. 0 to 100
   C. 100 – 500
   D. 400 – 1000

8. 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

9. Resistance of a gas in a vessel is given by (where, P = pressure, V = volume of the vessel, n = no. of moles of the gas, R = gas constant) ?

   A. V/nRT
   B. nRT/V
   C. nRT/P
   D. P/nRT

10. 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