What size of a junction box must be used if there is one 4" conduit and two 3" conduits entering on one side of the box and exiting at a 90° angle on another side of the box? (Assume the conductor size is No. 4 AWG or larger.)
a. 30"
b. 48"
c. 56"
d. 60"
a. 30"
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Ladders used to provide access to deck-forming levels must extend above the formwork at least _____.
a. 1 foot b. 2 feet c. 3 feet d. 4 feet
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Every central split cooling system manufactured in the USA today must have a Seasonal Energy Efficiency Ratio (SEER) of at least 10.
Answer the following statement true (T) or false (F)
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Silicate clay accumulation is most common in the ________
A) A horizon B) O Horizon C) E horizon D) B horizon E) C horizon
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The inducer in a condensing furnace runs, but the burners will not light. One possible cause is _____
a. an undersized inducer b. an open 24V transformer c. an oversized chimney d. snow blocking the air intake
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