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Sunday, 21 July 2013

Heat and Thermodynamics MCQ's 1

Heat and Thermodynamics MCQ's with answers from chapter 11 Heat and Thermodynamics Physics book 1 for FSC pre engineering and pre medical for Board of Intermediate and Secondary education. Also For Entry Test Preparation for UET, NUST, PIEAS, GIKI, AIR, FAST, WAH University, UHS, other engineering Universities and Medical Colleges.


1. Compressed air coming out of punctured football becomes cooler because of:
    A) isothermal expansion
    B) adiabatic expansion
    C) energy dissipation
    D) adiabatic compression


2. The normal human Temperature:

    A) 30 C
    B) 98 F
    C) 36.9 C
    D) both B and C


3. A person develops a heat engine working between 100 C and 0 C claims that he has ahieved 100% efficiency. His claim is :

    A) justified
    B) unjustified
    C) power stroke
    D) exhaust stroke


4. At constant pressure, the graph between V and T

    A) straigt line
    B) isotherm
    C) cannot be determined
    D) justified partially


5. SI unit of entropy is

    A) JK
    B) J/K
    C) cal/mole
    D) K/j


6. The efficiency of petrol engine is

    A) 25%
    B) 35%
    C) 45%
    D) none of these


7. Average velocity of molecules in a gas:

    A) zero
    B) positive
    C) negative
    D) infinity


8. Ideal gas law is written by

    A) PV=RT
    B) P=RTV
    C) PV=nRT
    D) all are correct


9. Efficiency of carnot heat engine is

    A) maximum
    B) minimum
    C) 100%
    D) infinity


10. Entropy neasures

    A) disorder of system
    B) unavailability of energy
    C) both above are correct
    D) temperature of substance

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5 comments:

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    Replies
    1. Unknown27 July 2013 at 12:13

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    Replies
    1. Anonymous27 July 2013 at 22:23

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      Delete
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