What components would be contained in a typical post-2007 exhaust gas aftertreatment system?

A. oxidizing catalytic converter
B. diesel particulate trap
C. muffler
D. all of the above


Answer: D

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Both four-cycle and two-cycle engines need oil added to keep them working properly

Indicate whether the statement is true or false.

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The various conductors, connections, and devices found in the path of electrical flow from the source through the components and back to the source:

A. conductor B. conduit C. circuit D. breaker E. none of the above

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When mounting an air handler on a concrete floor for seismic restraint, use _____

a. housed-spring devices with snubbers b. housed-spring devices with bumpers c. open-spring devices without snubbers d. open-spring devices with bumpers

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If you see the label "TIG" on a welding machine, that machine is considered to be what kind of a welding

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