Bare skin exposed to liquid refrigerant will:

A) Withstand 30 seconds of immersion.
B) Become immediately stiff and hard like an ice cube.
C) Feel like a burn and blister up.
D) Tingle, but not be seriously harmed.


C

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Digestive problems can arise from a lack of ____________________, the lactose-digesting enzyme

Fill in the blank(s) with correct word

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Oxygen at T=400 K and P=2 atm flows into an adiabatic, reversible nozzle operating at steady-state. The stream has a negligible velocity as it enters the nozzle but is ejected at a high velocity. The exiting oxygen is at P=0.5 atm. You may assume that oxygen is an ideal gas with constant Cp*=(7/2)R. On a mass basis, this is equivalent to CP = 0.909 kJ/kg-K.

A) Find the change in entropy of the universe resulting from this process. B) Find the temperature and velocity of the oxygen leaving the nozzle. C) Find ?U for the oxygen in J/mol.

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When the natural grade is at a lower elevation than the finished grade, ____ is required.

A. removal B. contouring C. cut D. fill

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Which position on the climate control panel should the driver select to avoid having the air-conditioning compressor turn on?

A) Heat B) Defrost C) AC D) Both A and B

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