Engineering Thermodynamics MCQ Questions & Answers | Mechanical Engineering

A. $$\frac{3}{7}$$

B. $$\frac{7}{3}$$

C. $$\frac{{11}}{3}$$

D. $$\frac{3}{{11}}$$

A. 80°C

B. 0°C

C. 40°C

D. 20°C

A. $$1 - {{\text{r}}^{\gamma - 1}}$$

B. $$1 + {{\text{r}}^{\gamma - 1}}$$

C. $$1 - \frac{1}{{{{\text{r}}^{\gamma - 1}}}}$$

D. $$1 + \frac{1}{{{{\text{r}}^{\gamma - 1}}}}$$

A. $$\frac{{{{\text{p}}_1}{{\text{v}}_1} - {{\text{p}}_2}{{\text{v}}_2}}}{{\gamma - 1}}$$

B. $$\frac{{{\text{mR}}\left( {{{\text{T}}_1} - {{\text{T}}_2}} \right)}}{{\gamma - 1}}$$

C. $$\frac{{{\text{mR}}{{\text{T}}_1}}}{{\gamma - 1}}\left( {1 - \frac{{{{\text{p}}_2}{{\text{v}}_2}}}{{{{\text{p}}_1}{{\text{v}}_1}}}} \right)$$

D. All of these

A. Total internal energy of a system during a process remains constant

B. Total energy of a system remains constant

C. Work-done by a system is equal to the heat transferred by the system

D. Internal energy, enthalpy and entropy during a process remain constant

A. It is possible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work

B. It is impossible to construct a device which operates in a cyclic process and produces no effect other than the transfer of heat from a cold body to a hot body

C. It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work

D. None of the above

A. It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work

B. It is possible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work

C. It is impossible to construct a device which operates in a cyclic process and produces no effect other than the transfer of heat from a cold body to a hot body

D. None of the above

A. Zeroth

B. First

C. Second

D. Third

A. It is possible to transfer heat from a body at a lower temperature to a body at a higher temperature.

B. It is impossible to transfer heat from a body at a lower temperature to a body at a higher temperature, without the aid of an external source.

C. It is possible to transfer heat from a body at a lower temperature to a body at a higher temperature by using refrigeration cycle.

D. None of the above

A. There is a definite amount of mechanical energy, which can be obtained from a given quantity of heat energy

B. It is impossible to transfer heat from a body at a lower temperature to a higher temperature, without the aid of an external source

C. It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work

D. All of the above