Which of the following is NOT a cause of high exhaust back pressure?
A) Vacuum leak B) Restricted exhaust pipe
C) Restricted catalytic converter D) Restricted muffler
A
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An HDET would NOT normally be required to do this:
a. track the operating expenses for a machine b. order replacement parts for a machine c. adjust operating systems to improve machine performance d. try to improve the designed performance parameters of a machine
A downside of using deep-cycle batteries is
A) they are inefficient B) they are expensive C) they require regular maintenance D) all of the above
In applications such as an automobile drive shaft or simply spinning on a single rope swing seat, the structural element is under torsion.
Answer the following statement true (T) or false (F)
Which of the following is an incorrect statement regarding the venting of a condensing furnace?
a. The intake and exhaust vents should be close together. b. The diameter of the vent pipe is based on the furnace input, the length of the vent, and the number of elbows. c. Installation guidelines for Category IV furnaces should be followed. d. The exhaust vent termination should be turned downward.