Factors used in selecting supply air registers are:
A) Round duct diameter, boot size, and room dimensions.
B) Required CFM, throw, face velocity, and static pressure drop.
C) Round duct diameter and boot size.
D) Boot size and register inventory.
B
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A ribbed reinforced concrete slab-on-ground foundation is preferred over a constant-thickness slab foundation because
A) it can be constructed more quickly. B) it does not require control joints. C) its formwork is simpler. D) it provides the same strength and stiffness at a lower cost. E) all of the above.
____________________ is a piece of material
Fill in the blank(s) with the appropriate word(s).
Which type of metering device used on flooded evaporators opens to admit more liquid refrigerant into the evaporator when the liquid level in the evaporator drops?
A) High side float B) Automatic expansion valve C) Electronic expansion valve D) Low side float
What type of gas is used to pressurize new ACR piping circuits for leak detection purposes?
A. oxygen B. carbon dioxide C. nitrogen D. refrigerant