What is the difference between supercritical and subcritical flow? Under what conditions will either of these occur?
What will be an ideal response?
Flows in channels can be tranquil or rapid. Flow is considered to be
critical when the depth of flow is the critical depth (i.e. the depth at which the
flow in a channel changes from tranquil to rapid). At this depth the specific
energy is minimized. When the flow depth is less than the critical depth, the flow
is known as supercritical. This type of rapid, turbulent flow is prevalent in steep
flumes and mountain streams. When the flow depth exceeds the critical depth, the
flow is subcritical, characterized by slower velocity and tranquil flow. Subcritical
flow is typically found in shallow broad channel of nearly flat slopes.
You might also like to view...
A major difference between common HVAC systems and air turnover systems is that air turnover systems _____.
a. cannot provide cooling b. are direct-fired units c. are designed to encourage stratification d. often use propeller fans to circulate the air
Round 47 minutes to the nearest tenth of an hour
What will be an ideal response?
Technician A says a fully engaged clutch friction disc must slip slightly to absorb engine vibrations Technician B says the clutch friction disc is designed to slip slightly during engagement and disengagement to provide smooth operation. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
Space that is not rentable under a lease by the property owner, but is available for use by tenants and visitors to a property is known as ______________.