A four-stroke/cycle six cylinder in-line...

Question 1 of 270705eccefa1bacbc34ba4d473c6

A four-stroke/cycle six cylinder in-line diesel engine has a firing order of 1-5-3-6-2-4. When cylinder #6 is firing at top dead center, piston #4 is __________.

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Question 1 of 27070

A four-stroke/cycle six cylinder in-line diesel engine has a firing order of 1-5-3-6-2-4. When cylinder #6 is firing at top dead center, piston #4 is __________.

🔍 Key Concepts

• Four-stroke cycle sequence (intake → compression → power → exhaust) and piston position at each stroke • How cylinders in an in-line multi-cylinder engine are paired (which pistons move together) • Relationship between firing order and crankshaft position (what TDC means for different cylinders at the same instant)

💭 Think About

• When cylinder #6 is at top dead center and firing, which stroke is it on in the four-stroke cycle? • In a six-cylinder in-line engine, which other piston reaches top dead center at the same time as #6, and what stroke will that companion piston be on? • How does the firing order 1-5-3-6-2-4 help you visualize which cylinders are on power vs compression at any given crankshaft position?

✅ Before You Answer

• Make sure you know which two pistons are at top dead center together in this type of six-cylinder in-line engine • Confirm which stroke corresponds to firing at TDC for a four-stroke diesel (power stroke vs compression stroke) • Double-check that the companion cylinder to #6 is correctly identified before choosing between TDC vs BDC and compression vs intake answers