On the cylinder indicator diagram...

Question 1 / 2707066636eef28f7522a1c51f8da

Question 1 of 2707066636eef28f7522a1c51f8da

On the cylinder indicator diagram illustrated, the dotted line indicated as "L" is describing the _________. Illustration MO-0033

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Question 1 of 27070

On the cylinder indicator diagram illustrated, the dotted line indicated as "L" is describing the _________. Illustration MO-0033

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

🔍 Key Concepts

• diesel engine indicator diagram – what each part of the pressure–crank-angle trace represents • difference between compression curve and expansion (power) curve on an indicator card • what happens to cylinder pressure if no fuel is injected compared with normal firing

💭 Think About

• Look at where line L is located on the crank-angle axis: is it on the compression side (before TDC) or on the expansion side (after TDC)? How does that position relate to each answer choice? • Compare the shape and level of the dotted line L with the solid firing curve. Under what operating condition would you expect a lower-pressure curve that roughly follows the expansion part of the cycle? • For each option, ask yourself: would that event or condition extend over a whole portion of crank travel, or would it be just a single point/angle like "90 degrees" or an instant like "beginning of compression"?

✅ Before You Answer

• Be sure you recognize which part of the diagram is compression (before TDC) and which is expansion/power stroke (after TDC). • Check whether line L represents a curve over a range of crank angles or a single point; eliminate choices that describe only a point. • Think about how the pressure trace would look if fuel were not injected at all versus when it is – would the curve be higher or lower than the normal firing/expansion line?

Question 1 of 27070

On the cylinder indicator diagram illustrated, the dotted line indicated as "L" is describing the _________. Illustration MO-0033

cylinder pressure without injection

firing pressure at 90 degrees crank angle

beginning of compression

power expansion curve

Question 1 / 2707066636eef28f7522a1c51f8da

Question 1 of 2707066636eef28f7522a1c51f8da

On the cylinder indicator diagram illustrated, the dotted line indicated as "L" is describing the _________. Illustration MO-0033

Back

Question 1 of 27070

On the cylinder indicator diagram illustrated, the dotted line indicated as "L" is describing the _________. Illustration MO-0033

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