On the rake of an asphalt shingle roof, _________.
A) a drip edge is installed after installing roof underlayment.
B) a drip edge is not required.
C) a drip edge is installed before installing roof underlayment.
A) a drip edge is installed after installing roof underlayment.
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Identify the major components of a kettle reboiler.
A pilot duty overload has a set of contacts that will open if an overload occurs in the ____________________ side of the overload.
Fill in the blank(s) with the appropriate word(s).
Describe different strategies that electricians use to properly position a duplex receptacle into a device box.
What will be an ideal response?
What measurements are required to check combustion efficiency?
A) O2% , CO2% , and CO ppm B) Return air temperature, supply and temperature, and stack temperature C) Manifold pressure, firing rate, and gas heating value D) Ambient temperature, stack temperature, and flue gas O2%