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 ________________?

Related Mcqs:

1. 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.

2. 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

3. 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

4. Working principle of bimetallic thermometers is difference in linear co-efficient of thermal expansion of two strips of different metals welded together. Which of the following has the maximum thermal co-efficient of linear expansion ?

   A. Nickel
   B. Brass
   C. Chromel
   D. Invar

5. Which of the following filled system expansion thermometer has the capability to measure the lowest temperature ?

   A. Mercury in glass thermometer
   B. Mercury in steel thermometer
   C. Alcohol in glass thermometer
   D. Fused metal (Na or K) in steel thermometer

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. 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

8. Platinum resistance thermometer can be used upto antimony point which is ____________ °C, and is the temperature of equilibrium between solid antimony & liquid antimony at normal atmospheric pressure?

   A. 961.93
   B. 630.74
   C. 1064.43
   D. 1261.93

9. 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

10. The ____________ of the fluid contained in the temperature sensing element (i.e., bulb) of filled system thermometers changes with change in temperature ?

    A. Pressure
    B. Volume
    C. Viscosity
    D. All A., B. and C.