Usps Exam 943 944 945 VERIFIED
HC - Answer✔hydrocarbons
Hc is caused by - Answer✔Misfire
Nox - Answer✔High exhaust temps caused by high combustion temp
Egr open - Answer✔Lean
Egr closed - Answer✔Rich
Rich - Answer✔Black smoke
Lean - Answer✔White smoke
Secondary spring - Answer✔Goes on first
lower ball joint - Answer✔Load bearing
Vacuum range - Answer✔14-22 "
Cam to crank - Answer✔Crank turns 2 times per 1 cam rotation
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