3648Chemical EngineeringMedium
Protective gas used in the annealing furnace for steel coil comprises of________?
A100% CO
B100% H2
C5% H2 + 9% N2
D95% N2 + 5% H2
Correct answer
D. 95% N2 + 5% H2
Explanation
The correct answer is 95% N2 + 5% H2.
Correct answer
D. 95% N2 + 5% H2
Explanation
The correct answer is 95% N2 + 5% H2.
Which of the following is not used as filter aid?
The delivery pressure of boiler feed water pump compared to the boiler steam pressure is________?
Hydrochloric acid absorber in made of________?
Viscosity index of a lubricating oil________?
Calorific value of gobar gas (containing CH4 = 60%, H2 = 10% ; CO2 = 30%) may be about ________ Kcal/Nm3?
At equal mass velocities, the values of film co-efficients for gases as compared to that for liquids are generally?