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.
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
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
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