Correct answer
D. 4
Explanation
The correct answer is 4.
The thickness of heat transfer plates used in the plate type heat exchanger ranges from ________ mm, pressed in a single piece provided with grooves & corrugations?
The internal energy of a gas obeying P (V – b) RT (where, b is a positive constant and has a constant Cv), depends upon its________?
Deacon’s method is used for the manufacture of________?
The non-dimensional temperature gradient in a liquid at the wall of a pipe is the ________?
In general, the limit of inflammability/explosion limit of fuel gases is widened by the________?
White phosphorous is stored under water, because ________?