Steam Nozzle - Steam Nozzle objective type questions and answers


16. A nozzle is said to be choked when .......


   A.Flow-through it is zero

   B.Flow is attained at maximum value corresponding to critical exit pressure

   C.It is not possible to increase the flow by increasing inlet pressure

   D.It is discharging into atmosphere


✔ View Answer


B.Flow is attained at maximum value corresponding to critical exit pressure

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17. In a nozzle,the effect of supersaturation is to.......


   A.Decrease the dryness fraction of steam

   B.Decreases the specific volume of steam

   C.Increase the entropy

   D.Increase the enthalpy drop


✔ View Answer


C.Increase the entropy

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18. That density of super saturated steam is about.........that of the ordinary saturated vapour at the corresponding pressure


   A.Same as

   B.2 times

   C.4 times

   C.8times


✔ View Answer


D.8times

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19. The superposition of steam results in slight......


   A.Increase in entropy

   B.Increase of final dryness fraction

   C.Increase of discharge

   D.Increase of density

   E.All the above


✔ View Answer


E.All the above

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20. For critical pressure ratio, the discharge through a nozzle is.......


   A.Maximum

   B.Minimum

   C.Zero

   D.Some value between maximum and minimum


✔ View Answer


A.Maximum

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