Question 1 of 20
Q
When a diesel engine compression pressure is checked, the indicator is connected to the __________.
A
cylinder exhaust ports
B
injection line
C
cylinder indicator cock
D
banjo oiler line
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Question 1 / 205eccefa1bacbc34ba4d473fb
Question 1 of 205eccefa1bacbc34ba4d473fb

When a diesel engine compression pressure is checked, the indicator is connected to the __________.

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Question 1 of 20
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When a diesel engine compression pressure is checked, the indicator is connected to the __________.

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šŸ” Key Concepts

ā€¢ Compression testing on diesel engines measures pressure developed inside the cylinder during cranking ā€¢ The gauge/indicator must be connected where it can directly sense cylinder pressure during the compression stroke ā€¢ Know the purpose and location of indicator cocks, exhaust ports, injection lines, and banjo oiler lines

šŸ’­ Think About

ā€¢ Ask yourself: during the compression stroke, where in the system will the true cylinder pressure be present and safely measurable? ā€¢ Which of these locations normally carries high-pressure fuel, not compressed air, and would be unsafe or incorrect to tap into for a compression test? ā€¢ Which fitting or opening on a diesel is specifically provided so you can observe/measure pressure inside the cylinder?

āœ… Before You Answer

ā€¢ Identify which option is a direct opening into the combustion space of the cylinder ā€¢ Eliminate any choice that is part of the fuel system rather than the air/compression space ā€¢ Eliminate any choice that is primarily for lubrication or exhaust discharge, not for pressure indication

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