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Friday, April 27, 2012

Science Test Thermodynamic Solved Paper

Science Test Thermodynamic Solved Paper
Thermodynamic Objective Questions
1. A closed system is one, which
(a) Permits the passage of energy and matter
across the boundaries
(b) Does not permit the passage of energy and
matter across the bandaries
(c) Permits the passage of energy across the
boundary but does not permit the passage of
matter
(d) Permits the passage of matter across the
boundary but does not permit the passage of
energy
ANSWER: (c)

2. A system comprising of a single phase, is known
As
(a) Open system
(b) Closed system
(c) Homogeneous system
(d) Heterogeneous system
ANSWER: (c)

3. For a closed system, the difference between heat
added to the system and work done by the system,
is equal to change in
(a) Temperature
(b) Internal energy
(c) Enthalpy
(d) Entropy
ANSWER: (b)

4. Control volume refers to
(a) A specified mass
(b) A Fixed region in the space
(c) A closed system
(d) None of the above
ANSWER: (b)

5. The ratio of specific heats of a gas at constant
pressure and at constant volume
(a) Varies with temperature
(b) Varies with pressure
(c) Is always constant
(d) None of the above
ANSWER: (c)

6. Specific heat is least for
(a) Water
(b) Air
(c) Steam
(d) Ice
ANSWER: (b)





7. The internal energy of an ideal gas depends only
on
(a) Pressure
(b) Volume
(c) Temperature
(d) None of the above
ANSWER: (c)

8. The value of atmospheric pressure is taken as
(a) 1.033 kg/cm
(b) 1.01 bar absolute at sea level
(c) Both (a) and (b) above
(d) None of the above
ANSWER: (c)

9. Numerical value of thermal capacity of a
substance as compared to water equivalent is
(a) Same
(b) Less
(c) More
(d) All of the above
ANSWER: (a)

10. Temperature of a system is
(a) A thermadynamic property
(b) An extensive property
(c) An intensive peroperty
(d) None of the above
ANSWER: (c)

11. Which of the following is not an extensive
property of a thermodynamic system?
(a) Total mass
(b) Total internal energy
(c) Total volume
(d) Temperature
ANSWER: (d)

12. The sequence of process that eventually returns
the working substance to its original state, is known as
(a) Event
(b) Thermodynamic cycle
(c) Thermodynamic property
(d) None of the above
ANSWER: (b)


13. The measurement of thermodynamic property
known as temperature, is based on
(a) Zeroth law of thermodynamics
(b) First law of thermodynamics
(c) Second law of thermodynamics
(d) None of the above
ANSWER: (a)



14. Heat and work are mutually convertible. This
statement is
(a) Zeroth law of thermodynamics
(b) First law of thermodynamics
(c) Second law of thermodynamics
(d) None of the above
ANSWER: (b)

15. Second law of thermodynamics defines
(a) Enthalpy             
(b) Entropy
(c) Heat                     
(d) Work
 ANSWER: (b)

16. The statement, which is not first law statement,is
(a) The heat transfer cannot exceed work done
(b) Heat transfer = work done and energy change
(c) Net heat transfer = net work done, for a cycle
(d) The energy of an isolated system remains constant
ANSWER: (a)

17. A system consisting of more than one phase is
known as
(a) Isolated system
(b) Open system
(c) Non-uniform system
(d) heterogeneous system
 ANSWER: (d)

18. According to Kelvin-Plank’s statement, a perpetual motion machine
(a) Of first kind is possible
(b) Of first kind is impossible
(c) Of second kind is impossible
(d) Of second kind is possible
ANSWER: (c)

19. Heat flows from hot substance to cold substance
unaided This statement is given by
(a) Kelvin
(b) Joule
(c) Gay Lussac
(d) Clausius
ANSWER: (d)

20. According to kinetic theory of gases, at absolute zero
(a) Specific heat of molecules reduces to zero
(b) Kinetic energy of molecules reduces to zero
(c) Volume of gas reduce to zero
(d) Pressure of gas reduce to zero
ANSWER: (b


21. The temperature of a gas is a measure of
(a) Average distance between gas molecules
(b) Average kinetic energy of gas molecules
(c) Average potential energy of gas molecules
(d) None of the above
ANSWER: (b)


22. According to kinetic theory of gases
(a) Temperature should rise during boiling
(b) Temperature should fall during freezing
(c) At absolute zero, there is absolutely no
vibration of molecules
(d) All of the above.
ANSWER: (c)

23. A perfect gas obeys
(a) Charles’s law
(b) Boyle’s law
(c) both (a) and (b) ,above
(d) none of the above
ANSWER: (c)

24. The absolute pressure of a given mass if a perfect
gas varies inversely as its volume, when the
temperature remains constant This statement is
(a) Bayle’s law        
(b) Charles’s law
(c) Gay Lussac law
(d) All of the above
ANSWER: (b)

25. For a perfect gas p / T = constant, if v is kept constant. This is
(a) Boyle’s law        
(b) Charles’s law
(c) Joule’s law         
(d) Gay Lussac law
ANSWER: (d)

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