Related Mcqs:

1. 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

2. The deflection of the free end of the bimetallic strips in a bimetallic thermometer with temperature is nearly__________________?

   A. Linear
   B. Non-linear
   C. Parabolic
   D. Hyperbolic

3. Working principle of mercury in glass thermometer is based on the ______________ of mercury with increase in temperature?

   A. Increase of pressure
   B. Increase of thermal conductivity
   C. Volumetric expansion
   D. Differential linear expansion

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. Working principle of mercury in glass thermometer is__________________?

   A. Volumetric expansion
   B. Pressure rise with temperature
   C. Linear expansion
   D. None of these

6. A mercury thermometer cannot be used to measure the temperature below the freezing point of mercury, which is _____________ °C?

   A. -38.9
   B. -11.9
   C. -60.9
   D. -80.9

7. Mercury thermometer is commonly used for low temperature measurement. The freezing point and boiling point of mercury are respectively _____________ °C?

   A. – 39 and 350
   B. – 51 and 439
   C. – 79 and 395
   D. – 10 and 425

8. 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.

9. 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

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