In the pressure-volume diagram shown in the...

Question 1 / 270705eccefa1bacbc34ba4d473eb

Question 1 of 270705eccefa1bacbc34ba4d473eb

In the pressure-volume diagram shown in the illustration, the atmospheric pressure line is indicated by line __________. Illustration MO-0035

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Question 1 of 27070

In the pressure-volume diagram shown in the illustration, the atmospheric pressure line is indicated by line __________. Illustration MO-0035

If the question has a related picture, it will appear here.

🔍 Key Concepts

• In a pressure-volume (P–V) diagram, atmospheric pressure is shown as a line of constant pressure (horizontal line). • Compare the positions of the various dashed reference lines to the plotted engine cycle to see which one represents zero gauge pressure (atmosphere). • Remember that compression and expansion curves must lie above atmospheric pressure for a working engine cycle.

💭 Think About

• Which line on the diagram stays at the same pressure value while volume changes along the bottom axis? • Which reference line is located just below the lowest part of the working cycle curves, representing outside air pressure rather than cylinder pressure? • Look at where the exhaust or intake processes approach atmospheric conditions—what line do they line up with?

✅ Before You Answer

• Identify which candidate line is perfectly horizontal, indicating constant pressure regardless of volume. • Confirm that the atmospheric line is below all the cycle curves (compression/expansion) but above the zero-pressure baseline, if shown. • Verify that intake or exhaust points that occur at nearly atmospheric conditions lie directly on or very close to this line.

Question 1 of 27070

In the pressure-volume diagram shown in the illustration, the atmospheric pressure line is indicated by line __________. Illustration MO-0035

Question 1 / 270705eccefa1bacbc34ba4d473eb

Question 1 of 270705eccefa1bacbc34ba4d473eb

In the pressure-volume diagram shown in the illustration, the atmospheric pressure line is indicated by line __________. Illustration MO-0035

Back

Question 1 of 27070

In the pressure-volume diagram shown in the illustration, the atmospheric pressure line is indicated by line __________. Illustration MO-0035

If the question has a related picture, it will appear here.