Which of the following is unlikely to directly affect the ability of a heating system to vent combustion products?
a. The diameter of the vent and vent connector
b. The combined length of the vent and vent connector
c. The number of elbows in the vent system
d. The type of ignition system used
d. The type of ignition system used
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The three types of fish tape are steel, nylon, and _____.
a. hemp b. copper c. cotton d. fiberglass
If a point source with intensity of 200 candela is 10 ft. above a 2 ft2 surface, what is the illumination level at the center of the surface?
A) 200 fc. B) 2 fc. C) 100 fc.
Soils that are fertile and hold nutrients will have a low cation exchange capacity
Indicate whether the statement is true or false
The ignition transformer provide
A) 120 to 240 volts AC to the electrodes B) 8,000 to 15,000 volts DC to the electrodes C) 8,000 to 15,000 volts AC to the electrodes D) 120 to 240 volts DC to the electrodes