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  • Question

  • According to Dalton's law of partial pressures, (where pb = Barometric pressure, pa = Partial pressure of dry air, and pv = Partial pressure of water vapour)


  • Options
  • A. Pb = pa - pv
  • B. Pb = pa + pv
  • C. Pb = pa x pv
  • D. Pb = pa/pv

  • Correct Answer
  • Pb = pa + pv 

    • More questions

    • 1. Tungsten when added to steel __________ the critical temperature.

    • Options
    • A. does not effect
    • B. lowers
    • C. raises
      • Discuss
    • 2. The unit of surface tension is

    • Options
    • A. N/m
    • B. N/m2
    • C. N/m3
    • D. N-m
      • Discuss
    • 3. When the two elements of a pair have a surface contact when relative motion takes place and the surface of one element slides over the surface of the other, the pair formed is known as a

    • Options
    • A. lower pair
    • B. higher pair
    • C. self-closed pair
    • D. force-closed pair
      • Discuss
    • 4. The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which

    • Options
    • A. delivers unit discharge under unit head
    • B. delivers unit discharge under unit speed
    • C. develops unit power under unit head
    • D. develops unit power under unit speed
      • Discuss
    • 5. The torsional rigidity of a shaft is expressed by the torque required to produce a twist of one radian per unit length of a shaft.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. Metal patterns are used for

    • Options
    • A. small castings
    • B. large castings
    • C. complicated castings
    • D. large scale production of castings
      • Discuss
    • 7. Which of the following impurity in cast iron promotes graphite nodule formation and increases the fluidity of the molten metal?

    • Options
    • A. Silicon
    • B. Sulphur
    • C. Manganese
    • D. Phosphorus
      • Discuss
    • 8. When the axes of the shafts, over which the gears are mounted, move relative to a fixed axis, then the train is known as reverted gear train.

    • Options
    • A. Right
    • B. Wrong
      • Discuss
    • 9. A beam of T-section is subjected to a shear force of F. The maximum shear force will occur at the

    • Options
    • A. top of the section
    • B. bottom of the section
    • C. neutral axis of the section
    • D. junction of web and flange
      • Discuss
    • 10. Bernoulli's equation is applied to

    • Options
    • A. venturimeter
    • B. orifice meter
    • C. pitot tube
    • D. all of these
      • Discuss

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