A. Water
B. Mercury
C. Methyl alcohol
D. Carbon-tetrachloride
Related Mcqs:
- 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 - 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 - Working principle of mercury in glass thermometer is__________________?
A. Volumetric expansion
B. Pressure rise with temperature
C. Linear expansion
D. None of these - 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 - 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. - 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 - Volumetric expansion is the working principle of the ______________ thermometers?
A. Mercury in glass
B. Constant volume gas
C. Vapor pressure
D. Bimetallic - 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 - 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 - 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
