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

Question 1 / 2066636eef28f7522a1c520103

Question 1 of 2066636eef28f7522a1c520103

In the pressure-volume diagram, shown in the illustration, what is indicated to have occurred by the line connecting points 'd' and 'e'? Illustration MO-0035

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Question 1 of 20

66636eef28f7522a1c520103

In the pressure-volume diagram, shown in the illustration, what is indicated to have occurred by the line connecting points 'd' and 'e'? Illustration MO-0035

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🔍 Key Concepts

• On a pressure-volume (P‑V) diagram, movement to the right means cylinder volume is increasing; movement left means volume is decreasing. • Movement up on the diagram means pressure is increasing; movement down means pressure is decreasing. • Relate line d → e to the engine stroke it represents: is the piston moving away from TDC (top dead center) or toward TDC, and is this typically an expansion (power) or compression stroke?

💭 Think About

• Look at the direction of the arrow from point d to e. Does the line go toward higher or lower pressure, and toward greater or smaller volume? • Ask yourself which stroke of a diesel or gasoline cycle has increasing volume with decreasing pressure, and which stroke has decreasing volume with increasing pressure. • Compare line d → e with the line that clearly represents compression on the diagram. Do they slope in the same or opposite direction?

✅ Before You Answer

• Verify whether volume at point e is greater or smaller than at point d. • Verify whether pressure at point e is greater or smaller than at point d. • Match that combination (increasing/decreasing pressure and volume) to whether it describes compression, expansion of combustion gases, or both pressure and volume increasing.

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Question 1 of 20

In the pressure-volume diagram, shown in the illustration, what is indicated to have occurred by the line connecting points 'd' and 'e'? Illustration MO-0035

The combustion gases have expanded.

The crankshaft has rotated 90�.

Pressure and volume have increased.

The fuel/air charge is compressed.

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Question 1 / 2066636eef28f7522a1c520103

Question 1 of 2066636eef28f7522a1c520103

In the pressure-volume diagram, shown in the illustration, what is indicated to have occurred by the line connecting points 'd' and 'e'? Illustration MO-0035

Back

Question 1 of 20

66636eef28f7522a1c520103

In the pressure-volume diagram, shown in the illustration, what is indicated to have occurred by the line connecting points 'd' and 'e'? Illustration MO-0035

No comments yet

Be the first to share your thoughts!

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

🔍 Key Concepts

💭 Think About

✅ Before You Answer

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