?What is the simple payback of a renewable energy heating system?
A. ?the installation cost divided by the annual operating cost savings
B. ?the number of years required for the investment to repay the higher initial cost using the savings it generates, relative to that of a conventional system
C. ?the number of years required for the annual operating cost savings to equal the installation cost
D. ?the installation cost divided by the difference between the installation cost of the system and a conventional system
Answer: B
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Indicate whether the statement is true or false
Two technicians are discussing clogged EGR passages. Technician A says that clogged EGR passages can cause excessive NOx exhaust emission. Technician B says that clogged EGR passages can cause the engine to ping (spark knock or detonation). Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
If aluminum power wire is used, to make a safe connection the installer should make sure:
A) That the furnace power connectors are rated for aluminum wire. B) To first spray the lugs with insulating spray. C) To use an aluminum-tipped screwdriver to tighten the lugs. D) The aluminum wire is one size smaller than a comparable copper wire.
It is acceptable to deviate from the text size specification if it is an important note or item.
Answer the following statement true (T) or false (F)