When a ladder is used to gain access to a roof, a minimum of ___ rungs should show above the roofline.
a. three
b. five
c. seven
d. one
Answer: b. five
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The raised, rectangular sheet metal frame that a rooftop unit rests on is called a:
A) Pad. B) Fixture. C) Curb. D) Frame.
Slow cranking by the starter can be caused by all of these, EXCEPT _________
A) A low or discharged battery B) Open neutral safety switch C) Corroded or dirty battery cables D) Engine mechanical problems
Using a solar powered self-compacting outdoor trash container _______________
A. eliminates unnecessary pick-ups by the unit's ability to wirelessly transmit bin level information to a central station B. bin and usage data can be used to design efficient pick up routes , vary the frequency of pick ups, and set containers in the best locations in the proper amounts C. works by detecting motion D. A and B
A variation of spray transfer welding in which current is cycled from high to low is _____
A) short circuit welding B) globular transfer welding C) pulsed transfer welding D) radial transfer welding