The velocity of steam leaving the nozzle (V) is given by (where K = Nozzle coefficient or nozzle efficiency and hd = Enthalpy or heat drop during expansion of steam in a nozzle)
A. V = 44.72 $${{\text{h}}_{\text{d}}}\sqrt {\text{K}} $$
B. V = 44.72 $${\text{K}}\sqrt {{{\text{h}}_{\text{d}}}} $$
C. V = 44.72$$\sqrt {{\text{K}}{{\text{h}}_{\text{d}}}} $$
D. V = 44.72 $${\text{K}}{{\text{h}}_{\text{d}}}$$
Answer: Option C
This Question Belongs to Mechanical Engineering >> Steam Boilers, Engines, Nozzles And Turbines
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The expansion of steam in a nozzle follows
A. Carnot cycle
B. Rankine cycle
C. Joule cycle
D. Stirling cycle
A. Steam enters and exhausts through the same port
B. Steam enters at one end and exhausts at the centre
C. Steam enters at the centre and exhausts at the other end
D. None of the above
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A. Increases
B. Decreases
C. Does not effect
D. None of these
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B. High calorific value coal being burnt
C. Fouling of heat transfer surfaces
D. Raising of steam temperature
The kinetic energy lost in friction is transformed into heat which tends to