The expansion ratio (r) is the ratio of (where v1 = Volume at the beginning of e

CuriousTab

CuriousTab

Home Aptitude

Discussion

Home ‣ Mechanical Engineering ‣ Thermodynamics Comments

Question
The expansion ratio (r) is the ratio of (where v₁ = Volume at the beginning of expansion, and v₂ = Volume at the end of expansion)
Options
A.
B.
C.
D.

Correct Answer

Thermodynamics problems

Search Results

2. When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called
Options
A. Zeroth law of thermodynamics
B. First law of thermodynamics
C. Second law of thermodynamics
D. Kelvin Planck's law

4. The general gas energy equation is (where Q_{1 - 2} = Heat supplied, dU = Change in internal energy, and W_{1 - 2} = Work done in heat units)
Options
A. Q_{1 - 2} = dU + W_{1 - 2}
B. Q_{1 - 2} = dU - W_{1 - 2}
C. Q_{1 - 2} = dU/W_{1 - 2}
D. Q_{1 - 2} = dU x W_{1 - 2}

7. Which of the following is the correct statement of the second law of thermodynamics?
Options
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 impossible to transfer heat from a body at a lower temperature to a higher temperature, without the aid of an external source.
C. There is a definite amount of mechanical energy, which can be obtained from a given quantity of heat energy.
D. all of the above

8. During which of the following process does heat rejection takes place in Carnot cycle?
Options
A. Isothermal expansion
B. Isentropic expansion
C. Isothermal compression
D. Isentropic compression

Comments

More in Mechanical Engineering: