Engineering Thermodynamics MCQ Questions & Answers | Mechanical Engineering

A. A thermodynamic machine

B. A non-thermodynamic machine

C. A hypothetical machine

D. A hypothetical machine whose operation would violate the laws of thermodynamics

A. O₂, N₂, steam, CO₂

B. O₂, N₂, water vapour

C. SO₂, NH₃, CO₂, moisture

D. O₂, N₂, H₂, air

A. Free expansion or friction resisted expansion/compression process should not be encountered

B. When heat is being absorbed, temperature of hot source and working substance should be same

C. When beat is being rejected, temperature of cold source and working substance should be same

D. All of the above

A. 1.013 bar

B. 760 mm of Hg

C. 1013 × 102 N/m²

D. All of these

A. Charles' law

B. Joule's law

C. Boyle's law

D. There is no such law

A. Nominal temperature and pressure

B. Natural temperature and pressure

C. Normal temperature and pressure

D. Normal thermodynamic practice

A. Conservation of heat

B. Conservation of momentum

C. Conservation of mass

D. Conservation of energy

A. Reversible process

B. Isothermal process

C. Adiabatic process

D. Irreversible process

A. $${{\text{Q}}_{1 - 2}} = {\text{dU}} + {{\text{W}}_{1 - 2}}$$

B. $${{\text{Q}}_{1 - 2}} = {\text{dU}} - {{\text{W}}_{1 - 2}}$$

C. $${{\text{Q}}_{1 - 2}} = \frac{{{\text{dU}}}}{{{{\text{W}}_{1 - 2}}}}$$

D. $${{\text{Q}}_{1 - 2}} = {\text{dU}} \times {{\text{W}}_{1 - 2}}$$

A. Two isothermal and two isentropic

B. Two isentropic and two constant volumes

C. Two isentropic, one constant volume and one constant pressure

D. Two isentropic and two constant pressures