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USPS Exams 943, 944, 945 (2025/2026) || Verified Correct Answers on Hydrocarbons, NOx & Combustion Already Graded A+

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USPS Exams 943, 944, 945 (2025/2026) || Verified Correct Answers on Hydrocarbons, NOx & Combustion Already Graded A+

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USPS Exams 943, 944, 945 (2025/2026) || Verified Correct Answers on
Hydrocarbons, NOx & Combustion Already Graded A+

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

What is used for piston pin diameter - (ANSWER)Micrometer

Amp - (ANSWER)Electrical current

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Uploaded on: July 26, 2026
Number of pages: 4
Written in: 2025/2026
Type: Exam (elaborations)
Contains: Questions & answers

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usps exams 943 944 945

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USPS Exams 943, 944, 945 (2025/2026) || Verified Correct Answers on Hydrocarbons, NOx & Combustion Already Graded A+

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