Average molecular weight of air is about ____________________?
Average molecular weight of air is about ____________________?
A. 21
B. 29
C. 23
D. 79
Similar Posts
Which of the following gravity scales is used exclusively for liquids heavier than water ?
Which of the following gravity scales is used exclusively for liquids heavier than water ?A. Baume scale
B. Twaddell scale
C. API scale
D. None of these1 BTU/lb.←°F is equivalent to ____________ kcal/kg.°C?
1 BTU/lb.←°F is equivalent to ____________ kcal/kg.°C?A. 1
B. 2.42
C. 1.987
D. 4.971 torr is equivalent to_________________?
1 torr is equivalent to_________________?A. 1 mm Hg
B. 1 Pascal
C. 1 atm
D. 1 mm wcThe ratio of existing moles of vapor per mole of vapor free gas to the moles of vapor that would be present per mole of vapor free gas, if the mixture were saturated at the existing temperature & pressure, is termed as the_____________________?
The ratio of existing moles of vapor per mole of vapor free gas to the moles of vapor that would be present per mole of vapor free gas, if the mixture were saturated at the existing temperature & pressure, is termed as the_____________________?A. Relative humidity
B. Relative saturation
C. Percentage saturation
D. None of theseThe value of the gas-law constant ‘R’ is 1.987 ?
The value of the gas-law constant ‘R’ is 1.987 ?A. kcal/kg-mole.°C
B. Btu/lb-mole.°R
C. kcal/kg-mole.°K
D. Both B. & C.Roof of a basic electric furnace is made of ______________ bricks?
Roof of a basic electric furnace is made of ______________ bricks?A. Superduty fireclay
B. Silica
C. Chromite
D. None of these