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Mechanical Engineering :: Thermodynamics

  1. The fuel mostly used in steam boilers is

  2. A.

     Brown coal

    B.

     Peat

    C.

     Coking bituminous coal

    D.

     Non-coking bituminous coal


  3. Water contained in a beaker can be made to boil by passing steam through it

  4. A.

     At atmospheric pressure

    B.

     At a pressure greater than atmospheric pressure

    C.

     Any pressure

    D.

     Not possible


  5. For which of the following substances, the internal energy and enthalpy are the functions of temperature only

  6. A.

     Any gas

    B.

     Saturated steam

    C.

     Water

    D.

     Perfect gas


  7. The mass of flue gas per kg of fuel is the ratio of the

  8. A.

     Mass of oxygen in 1 kg of flue gas to the mass of oxygen in 1 kg of fuel

    B.

     Mass of oxygen in 1 kg of fuel to the mass of oxygen in 1 kg of flue gas

    C.

     Mass of carbon in 1 kg of flue gas to the mass of carbon in 1 kg of fuel

    D.

     Mass of carbon in 1 kg of fuel to the mass of carbon in 1 kg of flue gas


  9. An open cycle gas turbine works on

  10. A.

     Otto cycle

    B.

     Carnot cycle

    C.

     Joule's cycle

    D.

     Stirling cycle


  11. One watt is equal to

  12. A.

     1 Nm/s

    B.

     1 N/m

    C.

     1 Nm/hr

    D.

     1 kNm/hr


  13. If a gas is heated against a pressure, keeping the volume constant, then work done will be equal to

  14. A.

     +ve

    B.

     -ve

    C.

     Zero

    D.

     Anywhere between zero and infinity


  15. The specific heat of air increases with increase in

  16. A.

     Temperature

    B.

     Pressure

    C.

     Both pressure and temperature

    D.

     Variation of its constituents


  17. The sum of internal energy (U) and the product of pressure and volume (p.v) is known as

  18. A.

     Work done

    B.

     Entropy

    C.

     Power

    D.

     Enthalpy


  19. The gas constant (R) is equal to the

  20. A.

     Sum of two specific heats

    B.

     Difference of two specific heats

    C.

     Product of two specific heats

    D.

     Ratio of two specific heats