Thermodynamics Practice Test - Set 11 - ObjectiveBooks
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# Practice Test: Question Set - 11

1. According to Gay Lussac’s law for a perfect gas, the absolute pressure of given mass varies directly as
(A) Temperature
(B) Absolute temperature, if volume is kept constant
(C) Volume, if temperature is kept constant
(D) None of these

2. An ideal gas as compared to a real gas at very high pressure occupies
(A) More volume
(B) Less volume
(C) Same volume
(D) Unpredictable behavior

3. In open cycle gas turbine plants
(A) Direct combustion systems is used
(B) A condenser is used
(C) The indirect heat exchanger and cooler is avoided
(D) All of the above

4. One Joule (J) is equal to
(A) 1 kN-m
(B) 1 N-m
(C) 10 kN-m/s
(D) 10 N-m/s

5. General gas equation is
(A) PV=nRT
(B) PV=mRT
(C) PV = C
(D) PV=KiRT

6. Kinetic theory of gases assumes that the collisions between the molecules are
(A) Perfectly elastic
(B) Perfectly inelastic
(C) Partly elastic
(D) Partly inelastic

7. The pressure of a gas in terms of its mean kinetic energy per unit volume 'E' is equal to
(A) E/3
(B) E/2
(C) 3E/4
(D) 2E/3

8. Kinetic energy of the molecules in terms of absolute temperature (T) is proportional to
(A) T
(B) J
(C)
(D) Vr

9. The efficiency of Joule cycle is
(A) Less than Carnot cycle
(B) Equal to Carnot cycle
(C) Greater than Carnot cycle
(D) None of these

10. The state of a substance whose evaporation from its liquid state is complete, is known as
(A) Perfect gas
(B) Vapour
(C) Steam
(D) Air

11. Which law states that the internal energy of a gas is a function of temperature?
(A) Charles' law
(B) Joule's law
(C) Boyle's law
(D) There is no such law

12. The same volume of all gases would represent their
(A) Densities
(B) Specific weights
(C) Molecular weights
(D) Gas characteristic constants

13. Which law states that the specific heat of a gas remains constant at all temperatures and pressures?
(A) Charles' Law
(B) Joule's Law
(C) Regnault's Law
(D) Boyle's Law

14. An open 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

15. The hyperbolic process is governed by
(A) Avogadro's law
(B) Boyle's law
(C) Charles' law
(D) Gay-Lussac law

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