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)