5605Chemical EngineeringMedium
The thermal efficiency of an air/fuel gas preheating recuperator may be as high as ________ percent?
A65
B85
C50
D99
Correct answer
B. 85
Explanation
The correct answer is 85.
Correct answer
B. 85
Explanation
The correct answer is 85.
Ball mills and tube mills with flint or porcelain balls are used for size reduction of________?
Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity) ________?
Failure of a material is termed as fatigue failure, if it fails below the yield point. The resistance to fatigue failure of a material is measured by the________?
Which of the following is a poisonous fuel gas?
Isopropyl benzene produced by alkylation of benzene with propylene is known as ________?
Pick out the wrong statement?