A two-line oil piping system is used when the oil supply level is below the burner because it _____

a. provides twice as much oil to the burner
b. eliminates the need to bleed air from the lines
c. provides a backup supply in case one pipe gets plugged
d. prevents water from entering the tank


b

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Answer the following statement(s) true (T) or false (F)

1. Electronic brakes require extensive maintenance, adjustment, and periodic replacement of worn parts. 2. Three-phase electric braking reduces the heat buildup in the motor as compared to single-phase braking. 3. A self-contained transformer and rectifier provide the direct current required for braking. 4. DC and AC supplies must be connected to a motor at the same time. 5. The sudden stopping of a motor by mechanical brakes can often harm the motor or load.

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A short circuit is a conducting connection between _____.

a. ungrounded conductors b. ungrounded connectors and non-current carrying conductors c. grounded connectors and non-current carrying conductors d. any of the conductors of an electrical system

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The power train control module may be found everywhere on the vehicle, EXCEPT:

A. the passenger compartment B. the inner fender C. the driver's door D. the firewall

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Which of the following can be used to reduce NOx emissions?

A. Increasing flue gas releases B. Switching to fuel with a lower nitrogen content C. Use of high NOX burners D. All of the above

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