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Mechanical Engineering :: Steam Nozzles and Turbines

  1. In a Tandem type compound engine, the high pressure and low pressure cylinders

  2. A.

     Have common piston rod

    B.

     Are set at 90°

    C.

     Have separate piston rods

    D.

     Are set in V-arrangement


  3. In a receiver type compound engine, the high pressure and low pressure cylinders

  4. A.

     Have common piston rod

    B.

     Are set at 90°

    C.

     Have separate piston rods

    D.

     Are set in V-arrangement


  5. In a Woolf type compound engine, the high pressure and low pressure cylinders

  6. A.

     Have common piston rod

    B.

     Are set at 90°

    C.

     Have separate piston rod

    D.

     Are set in V arrangement


  7. The specific volume of steam with increase in pressure decreases

  8. A.

     Linearly

    B.

     Slowly first and then rapidly

    C.

     Rapidly first and then slowly

    D.

     Inversely


  9. The saturation temperature of steam with increase in pressure increases

  10. A.

     Linearly

    B.

     Rapidly first and then slowly

    C.

     Slowly first and then rapidly

    D.

     Inversely


  11. The difference of supersaturated temperature and saturation temperature at that pressure is called

  12. A.

     Degree of super-saturation

    B.

     Degree of superheat

    C.

     Degree of under-cooling

    D.

     None of these


  13. The high pressure boiler is one, which produces steam at a pressure more than

  14. A.

     Atmospheric pressure

    B.

     5 kg/cm²

    C.

     10 kg/cm²

    D.

     7580 kg/cm²


  15. Natural water circulation, by convection in water tube boilers, with increase in pressure of boiler

  16. A.

     Increases

    B.

     Decreases

    C.

     Remain unaffected

    D.

     First increases and then decreases


  17. The safety valve on boiler drum compared to safety valve on superheater is set at

  18. A.

     Same value

    B.

     Higher value

    C.

     Lower value

    D.

     Lower/higher depending on steam flow


  19. The crown of the fire box is made hemispherical in order to

  20. A.

     Give maximum space

    B.

     Give maximum strength

    C.

     Withstand pressure inside boiler

    D.

     Resist intense heat in fire box