# Mechanical Engineering - Thermodynamics

Exercise : Thermodynamics - Section 2
1.
According to Kelvin-Planck's statement of second law of thermodynamics,
it is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
it is possible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work
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
none of the above
Explanation:
No answer description is available. Let's discuss.

2.
According to Gay-Lussac law, the absolute pressure of a given mass of a perfect gas varies __________ as its absolute temperature, when the volume remains constant.
directly
indirectly
Explanation:
No answer description is available. Let's discuss.

3.
the product of the gas constant and the molecular mass of an ideal gas is constant
the sum of partial pressure of the mixture of two gases is sum of the two
equal volumes of all gases, at the same temperature and pressure, contain equal number of molecules
all of the above
Explanation:
No answer description is available. Let's discuss.

4.
A process, in which the temperature of the working substance remains constant during its expansion or compression, is called
isothermal process
hyperbolic process
polytropic process