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থার্মোডায়নামিক্স অ্যান্ড হিট ইঞ্জিনস MCQ
1. 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
2. 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
3. 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
8. 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
13. 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
14. A heat exchange process in which the product of pressure and volume Remains constant is known as-
Heat exchange process
Throttling process
Isentropic process
Hyperbolic process
15. 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