engineering recuitment NCL Assistant Foreman (Trainee) Mock Test 2024 Fluid Mechanics Turbomachinery Pumps
Which of the following expressions give the Thoma’s cavitation factor (σ), which is basically used to determine whether cavitation will occur in any portion of the turbine? Where, Ha = atmospheric pressure head, Hv = vapour pressure head, Hs = suction pressure head, H = working head of turbine.
1
(Ha + Hv - Hs) / H
2
(Ha - Hs) / H
3
(Hv - Hs) / H
4
(Ha - Hv - Hs) / H