Describe the heat exchanger in a natural gas fired unit heater
What will be an ideal response?
Hot exhaust from the fire box passes up through sheet metal tubes while
cool greenhouse air is passed over the outside of the tubes where it picks up heat
from the tubes and then blows out into the greenhouse.
You might also like to view...
If the wooden handle on a tool is cracked, _____.
a. it may be safely used until it breaks b. it can be repaired with electrical tape c. tag the tool out of service and do not use it d. it can be used until the crack exceeds 1/4” (6 mm)
Sometimes the shielding gas is referred to as the shielding ____________________.
Fill in the blank(s) with the appropriate word(s).
When rebar must be cut to close tolerances, the preferred tools are an abrasive (chop) saw or a(n) _____.
a. hacksaw b. oxyacetylene torch c. portable band saw d. bolt cutter
What is the area of a washer with an inside diameter of 1 1/2 inches and an outside diameter of 3 1/4 inches? Express the answer to the nearest thousandth square inch.
What will be an ideal response?