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WorksheetsPTT154 Quiz 4: Lecture 4
Total questions: 10
Worksheet time: 3mins
Which of the following is not important in terms of valve sizing?
Critical pressure
Vapor pressure
Pressure drop
Atmospheric pressure
Which of the following is not related to cavitation?
Creation of vapor bubbles
Implosion of the created vapor bubbles
Pressure drops below the vapor pressure of the fluid
Causes damage in the form of erosion of the metal surfaces
When the fluid moves into larger area of the vessel, the pressure will ________________ to a certain extent.
Increase
Decrease
Remain the same
The implosion of the bubble formed is caused by the __________ fluid pressure than the vapor pressure.
Higher
Lower
Same
Recover
Flashing issue of the fluid flows after the valve opening is not caused by:
Formation of bubbles near the openings
Implosion of the bubbles
Downstream pressure does not recover above the vapor pressure
Higher velocities and erosion of valve components
Which of the following flow condition has the lowest pressure drop after the valve opening?
Normal flow
Cavitating flow
Flashing flow
No flow
Which of the following is correct about cavitating flow?
The pressure drop of cavitating flow is the higher than flashing flow
More bubbles remain in cavitating flow than flashing flow
The downstream pressure in cavitating flow has higher recovery as compared to flashing flow
Cavitating flow is typically associated with fluid flowing at higher velocities
Choked flow occurs when:
The fluid velocity reaches sonic values
The fluid velocity reaches below sonic values
The fluid velocity reaches above sonic values
Which of the following is true at choked flow condition?
The velocity will not increase even with higher pressure drop
The flow rate has reached a minimum value due to cavitation or flashing
The conventional pressure drop is the same as the choked pressure drop
The allowable pressure drop must be chosen when the choked pressure drop is higher than the actual pressure drop
Did the cavitation occurs in the Example 2?
Yes
No
Maybe
I don't know
