-min%20(5).webp "basic-fitting-mcq")
11. Which of the following items is not a path function?
Ans : (d) : Thermal conductivity is not a path functions.
12. Which one of the properties given below is an intensive property of the system
Ans. (a) : Volume, Kinetic energy and entropy are the example of extensive property where as composition is the example of intensive property.
13. Which pair of the following alternatives is correctly matched ?
Ans. (c) : Entropy – Second law of thermodynamics
14. Thermodynamic work is the product of
Ans : (c) For quasistatic process work done is calculated by P.dV ∫ Pressure = Intensive property. Volume (dV) = change in an extensive property. Thermodynamic work is the product of An intensive property and change in an extensive property.
15. Bi-Metallic strips made of two different materials bend during a rise is temperature because of
Ans. (a) : Bi-Metallic strips made of two different materials bend during a rise is temperature because of differences in coefficient of linear expansion.
16. The gauge pressure in a truck tire before and after the journey was recorded as 200 kPa and 220 kPa respectively at the location where atmospheric pressure and temperature was 100 kPa and 27ºC respectively. How much the rise in temperature of tire air after trip?
(c) 47ºC
17. The condition for the reversibility of a cycle is
Ans : (d) : The condition for the reversibility of a cycleisThe pressure and temperature of the workingsubstance must not differ, appreciably from those in theprocess.The working parts of the engine must be friction free.
18. Which of the following is an example ofirreversible process?
Ans. (b) :Irreversible process- In an irreversible process, there isa loss of heat due to friction, radiation and conduction.In an actual practice, most of the processes are irreversible to some degree The main causes for the irreversibility may be. (i) Mechanical and fluid friction (ii) Unrestricted expansion (iii) Heat transfer with a finite temperature difference.
19. Which of the following is considered as thermodynamic potential?
Ans. (c) : Enthalpy is considered as thermodynamic potential
20. Pressure of 1 (one) atmosphere is equivalent to:
Ans. (a) : 1 atmosphere pressure = 101325 Pa