SSC JE Mechanical Engineering 25th Jan 2018 Shift-2

converging

diverging

intersecting

parallel

Liquid and solid phase can coexist

Liquid and vapour phase can coexist

solid and vapour phase can coexist

Liquid vapour and solid all phase can coexist

$$h_1 + \frac{c_1^2}{2} + gz_1 + \frac{dQ}{dm} = h_2 + \frac{c_2^2}{2} + gz_2 + \frac{dW}{dm}$$

$$h_1 + \frac{c_1^2}{2} + gz_1 - \frac{dQ}{dm} = h_2 + \frac{c_2^2}{2} + gz_2 - \frac{dW}{dm}$$

$$h_1 + \frac{c_1^2}{2000} +\frac{gz_1}{1000} + \frac{dQ}{dm} = h_2 + \frac{c_2^2}{2000} + \frac{gz_2}{1000} + \frac{dW}{dm}$$

$$h_1 + \frac{c_1^2}{2000} +\frac{gz_1}{1000} - \frac{dQ}{dm} = h_2 + \frac{c_2^2}{2000} + \frac{gz_2}{1000} - \frac{dW}{dm}$$

0

30

303

Cannot be determined

$$\left(W_{H.P}\right)_{Reversible} = \left(W_{H.P}\right)_{irreversible}$$

$$\left(W_{H.P}\right)_{Reversible} > \left(W_{H.P}\right)_{irreversible}$$

$$\left(W_{H.P}\right)_{Reversible} < \left(W_{H.P}\right)_{irreversible}$$

None of these

Air

Fuel

Air and Fuel

Air and lubricant oil

Increases linearly

Decreases linearly

Increases parabolically

Decreases parabolically

$$Q_{A1-2} + W_{A1-2} = Q_{B2-1} + W_{B2-1}$$

$$Q_{A1-2} - W_{A1-2} = Q_{B2-1} - W_{B2-1}$$

$$Q_{A1-2} + Q_{B2-1} = W_{A1-2} + W_{B2-1}$$

$$Q_{B2-1} - Q_{A1-2} = W_{B2-1} - W_{A1-2}$$

Heat transferred is zero.

Work done is zero.

Internal energy remains constant.

All options are correct

Substance that contracts on freezing

Substance that expandson freezing

Substance that has same volumeon freezing

None of these