Correct answer
B. 30 to 50
Explanation
The correct answer is 30 to 50.
The equation, (NSt × N2/3 Pr) = f/2, is the ________ analogy?
Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by________?
Most of the centrifugal pumps used in chemical plants are usually ________ driven?
Air at a particular humidity is heated in a furnace. The new dew point________?
Refractory materials are never used in the construction of ________?
The ratio of linear stress to linear strain is termed as the ________?