Asphyxiation may occur from breathing in refrigerant, as it is heavier than air and will:
A) Create carbon monoxide fumes. B) Settle at the ceiling.
C) Release nitrogen into the room. D) Displace air in the room.
D
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The safety questions must be answered with a minimum accuracy of ____%.
A. 80 B. 85 C. 90 D. 95
The heat exchanger that is designed to take the highest flow rates and largest temperature differences is:
a. u-tube b. plate and frame c. double-pipe d. fixed heads, multipass
The inner and outer surfaces of a 25-cm-thick wall in summer are at 27°C and 44°C, respectively. The outer surface of the wall exchanges heat by radiation with surrounding surfaces at 40°C and by convection with ambient air also at 40°C with a convection heat transfer coefficient of 8?W/m2•K. Solar radiation is incident on the surface at a rate of 150?W/m2. If both the emissivity and the solar absorptivity of the outer surface are 0.8, determine the effective thermal conductivity of the wall.
What will be an ideal response?
Which exhaust gas reading indicates a good catalytic converter?
A) CO is zero B) O2 is zero C) Both A and B D) Neither A nor B