Mechanical Engineering - MCQ Practice Questions

Which of the following is an intensive property in thermodynamics?

The First Law of Thermodynamics is a statement of conservation of:

For an ideal gas undergoing an isothermal process, the change in internal energy is:

The entropy of a reversible adiabatic process is:

Which process requires zero work to be done by the system?

A heat engine operates between temperature reservoirs of 500 K and 300 K. What is the maximum possible efficiency of this engine?

What is the first law of thermodynamics in differential form?

What is the relationship between specific heats C_p and C_v for an ideal gas?

A reversible adiabatic process for an ideal gas is also known as:

Which thermodynamic property is NOT a state function?

A gas undergoes an isobaric process. If 500 J of heat is added and the gas expands such that work done by the gas is 200 J, what is the change in internal energy?

Which of the following has the highest specific heat capacity among common substances at room temperature?

In a constant volume process, 300 J of heat is removed from a gas. Calculate the work done and change in internal energy.

What is the SI unit of entropy?

If the specific heat at constant volume (Cv) for a diatomic ideal gas is 5R/2, what is its specific heat at constant pressure (Cp)?

A system undergoes a cyclic process. The net work done by the system is 150 kJ and the net heat absorbed is 150 kJ. Which statement is correct?

Which of the following processes has zero work done by/on the gas?

Which statement correctly describes the second law of thermodynamics?

For a substance, the triple point and critical point data are important in phase diagrams. At the triple point, how many phases can coexist?

A gas mixture contains N2 (40%) and O2 (60%) by mole fraction. What is the partial pressure of N2 if total pressure is 5 bar?