Thermodynamics Mcqs
This set of Mechanical engineering Multiple Choice Questions & Answers (MCQs) focuses on study of “ Thermodynamics ”. These questions are chosen from a collection of most authoritative and best reference books on Mechanical engineering. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams, Jobs and interviews. One should practice our MCQS to assimilate Thermodynamics comprehensively.
2. The behaviour of gases can be fully determined by___________________?
1 law
2 laws
3 laws
4 laws
3. Boyle’s law i.e. pV = constant is applicable to gases under ___________________?
All ranges of pressures
Only small range of pressures
High range of pressures
Steady change of pressures
Answer & Solution
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4. The same volume of all gases would represent their____________________?
Densities
Specific weights
Molecular weights
Gas characteristic constants
Answer & Solution
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5. According to which law, all perfect gases change in volume by l/273th of their original volume at 0°C for every 1°C change in temperature when pressure remains constant ____________________?
Joule’s law
Boyle’s law
Regnault’s law
Gay-Lussac law
Charles’ law
Answer & Solution
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6. According to Avogadro’s Hypothesis ______________________?
The molecular weights of all the perfect gases occupy the same volume under same conditions of pressure and temperature
The sum of partial pressure of mixture of two gases is sum of the two
Product of the gas constant and the molecular weight of an ideal gas is constant
Gases have two values of specific heat
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7. Work done in a free expansion process is___________________?
+ ve
-ve
Zero
Maximum
8. 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
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9. 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
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10. Which of the following quantities is not the property of the system__________________?
Pressure
Temperature
Specific volume
Heat
11. Mixture of ice and water form a________________________?
Closed system
Open system
Isolated system
Heterogeneous system
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12. On weight basis, air contains following parts of oxygen_________________?
21
23
25
73
13. Which of the following items is not a path function ____________________?
Heat
Work
Kinetic energy
Vdp
Thermal conductivity
Answer & Solution
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14. Heat and work are ____________________?
Point functions
System properties
Path functions
Intensive properties
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15. The value of n = 1 in the poly tropic process indicates it to be __________________?
Reversible process
Isothermal process
Adiabatic process
Irreversible process
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