A two stage compressor is used to compress an ideal gas. The gas is cooled to the initial temperature after each stage. The intermediate pressure for the minimum total work requirement should be equal to the ________ mean of P1 and P2.(where, P1 and P2 are initial and final pressures respectively)?

Entropy is a measure of the ________ of a system?

For a 25 mm hole drilled in plates to be riveted, the shank diameter of the rivet should be ________ mm?

Diesel index (an alternative index for expressing the quality of diesel) is________?

Lavatory cisterns are normally made of ________?

Unsaturated air (with dry bulb temperature and dew point being 35°C and 18°C respectively) is passed through a water spray chamber maintained at 15°C. The air will be cooled________?