Related Mcqs:

1. 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

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. 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. 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

5. 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

6. 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

7. 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

8. 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

9. The ____________ of a vapor pressure thermometer is a secondary element ?

   A. Pointer
   B. Bourdon tube
   C. Bulb
   D. None of these

10. The _____________ of a vapor pressure thermometer is a functioning element?

    A. Pointer
    B. Bourdon tube
    C. Bulb
    D. None of these