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থার্মোডায়নামিক্স অ্যান্ড হিট ইঞ্জিনস MCQ
2. A mixture of gas expands from 0.03m to 0.06^3m at a constant pressure of 1 mpa and absorbs 84kj of heat during the process. The change in internal energy of the mixture is-
30 kj
54 kj
84 kj
114 kj
3. For the same heat input and same compression ration.
Otto cycle and diesel cycle are equally efficient
Otto cycle is less efficient than diesel cycle
Efficiency depends mainly on working substance
None of the above
4. A process in which the temperature of the working substance remains constant during its expansion or compression is called-
Isothermal process
Hyperbolic process
Adiabatic process
Polytrophic process
10. Work done in an adiabatic process between a given pair of end states depends on-
The end states only
particular adiabatic process
The value of index n
The value of heatt ransferred
14. An isolated system is one in which-
Mass does not cross boundaries of the system, though energy may do so
Neither mass nor energy crosses the boundaries of the system
Both energy and mass cross the boundaries of the system
Mass crosses the boundary but not the energy
18. To convert volumetric analysis to gravimetric analysis, the relative volume of each constituent of the flue gases is-
Divided by its molecular weight
Multiplied by its molecular weight
Multiplied by its density
Multiplied by its specific weight