Octane number of n-heptane is assumed to be________?

Stoke’s equation is valid in the Reynolds number range________?

The internal energy of an ideal gas does not change in a reversible ________ process?

A fluid is flowing inside the inner tube of a double pipe heat exchanger with diameter ‘d’. For a fixed mass flow rate, the tube side heat transfer co-efficient for turbulent flow conditions is proportional to________?

Which of the following factors affect the pressure drop in a co-current gas-liquid absorption packed tower?

The function of moderators in nuclear reactor is to ________?