What is the value of optimum intermediate pressure is the cooling ratio is fixed in a compound VCR with intercooling having suction and discharge pressure as 2 and 8 bar respectively?

Which of the following is not true about single-stage compression?

Which of the following is not the difference between theoretical and actual VCR cycle?

What is the effect of a decrease in suction pressure on C.O.P.?

What is the effect of an increase in discharge pressure on C.O.P.?

Which of the following factor of the actual VCR affects severely the coefficient of performance?

If the radius of any current carrying conductor is less than the critical radius, then why the addition of electrical insulation will enable the wire to carry a higher current?

Which of the following substance has the minimum value of thermal conductivity?

For conduction through a spherical wall with constant thermal conductivity and with inner side temperature greater than outer wall temperature in 1-D heat transfer, what is the type of temperature
distribution?

Which of the following expresses the thermal diffusivity of a substance in terms of thermal conductivity of a substance (k), mass density (ρ) and specific heat (c)?

A copper block and an air mass block having similar dimensions are subjected to symmetrical heat transfer from one face of the each block. The other face of the block will be reaching to the same temperature at a rate?