Consider turbulent forced convection in a circular tube. Will the heat flux be higher near the inlet of the tube or near the exit? Why?
What will be an ideal response?
The heat flux will be higher near the inlet because the heat transfer coefficient is highest at the tube inlet where the thickness of thermal boundary layer is zero, and decreases gradually to the fully developed value.
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A) To allow the flow direction to be reversed for cooling B) To keep the length of piping the same for each convector unit C) To reduce the amount of piping required D) To operate a two-pipe system like a one-pipe system
Fractionation can occur within zeotropic refrigerating when they:
A) Change temperature. B) Mix. C) Freeze. D) Change state.
On the XY plane, all points in quadrant III are:
A) Some negative and some positive B) Positive C) Inversely coded D) Negative
What is being checked in this illustration?
A) Backlash
B) Side bearing preload
C) Gear pattern
D) Pinion preload