SSC JE Mechanical Engineering 22nd Jan 2018 Shift-2
For the following questions answer them individually
The maximum heat content at $$100^\circ C$$ in cal/m$$^3$$ is possessed by the following gas.
The ratio of the specific heat at constant pressure to specific heat at constant volume for air is equal to
In a polytropic process
(a) $$\frac{T_1}{T_2} = \left(\frac{V_2}{V_1}\right)^{n - \frac{1}{n}} = \left(\frac{p_1}{p_2}\right)^{n - 1}$$
(b) $$\frac{T_1}{T_2} = \left(\frac{V_2}{V_1}\right)^{n - 1} = \left(\frac{p_1}{p_2}\right)^{n}$$
(c) $$\frac{T_1}{T_2} = \left(\frac{V_2}{V_1}\right)^{n - 1} = \left(\frac{p_2}{p_1}\right)^{n - 1}$$
(d) $$\frac{T_1}{T_2} = \left(\frac{V_2}{V_1}\right)^{n - 1} = \left(\frac{p_2}{p_1}\right)^{n - \frac{1}{n}}$$
A carnot engine rejects 30% of absorbed heat at a sink at $$30^\circ C$$. The temperature of the heat source is
Which one of the following phenomena occurs whengasin a piston-in-cylinder assembly expands reversibly at constant pressure?
A Carnot heat pump works between temperature limits of $$277^\circ C$$ and $$27^\circ C$$. Its COP is
