The most efficient weep hole in a brick veneer consists of
A) a wick.
B) an open-head joint.
C) a plastic tube.
D) none of the above.
B) an open-head joint.
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The cad cell in an oil furnace performs the same function as which device in a gas furnace?
a. Temperature limit switch b. Flame detector c. Hot surface igniter d. Flame rollout switch
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Which oil specification stands for the thickness (viscosity)?
A) ILSAC B) ACEA C) SAE D) API
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Adding humidity to heated air:
A) Increases the perceived room temperature. B) Has no effect on perceived room temperature. C) Reduces the level of carbon particles generated by heat pumps. D) Decreases the perceived room temperature.
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How many layers of underlayment are required for roof slopes of 3/12 or less?
A) 1 B) 3 C) 2 D) 0
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