Mechanical Engineering Mcqs
Boyle’s law i.e. pV = constant is applicable to gases under ___________________?

A. All ranges of pressures
B. Only small range of pressures
C. High range of pressures
D. Steady change of pressures

The same volume of all gases would represent their____________________?

A. Densities
B. Specific weights
C. Molecular weights
D. Gas characteristic constants

According to Avogadro’s Hypothesis ______________________?

A. The molecular weights of all the perfect gases occupy the same volume under same conditions of pressure and temperature
B. The sum of partial pressure of mixture of two gases is sum of the two
C. Product of the gas constant and the molecular weight of an ideal gas is constant
D. Gases have two values of specific heat

To convert volumetric analysis to gravimetric analysis, the relative volume of each constituent of the flue gases is____________________?

A. Divided by its molecular weight
B. Multiplied by its molecular weight
C. Multiplied by its density
D. Multiplied by its specific weight

An isolated system is one in which_____________________?

A. Mass does not cross boundaries of the system, though energy may do so
B. Neither mass nor energy crosses the boundaries of the system
C. Both energy and mass cross the boundaries of the system
D. Mass crosses the boundary but not the energy