The main engines on your fishery research...

Question 1 / 2066636eef28f7522a1c51fe2a

Question 1 of 2066636eef28f7522a1c51fe2a

The main engines on your fishery research vessel utilize a starting system similar to that shown in the illustration. The air supply pressure and engine room ambient temperatures are both within the normal range. Upon attempted start-up, the engine turns very slowly, and the flow rate of air from the air starting motor exhaust is very low. Which of the listed conditions would most likely be the cause of the failure to start? Illustration MO-0203

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🔍 Key Concepts

• Air starting motor operation and what a low air exhaust flow indicates • Effect of a blocked strainer versus a blocked lubricator line on overall air flow • Whether a problem in the fuel injection system would change the cranking speed or only the ability to fire

💭 Think About

• Look at the illustration and trace the air path from the air supply to the air exhaust. Which component, if restricted, would reduce air flow to the motor itself? • If the engine is cranking slowly, is that more likely to be caused by a mechanical problem inside the air motor, or by a restriction upstream of it? • Which option would affect lubrication of the air motor but still allow nearly normal air flow for a short time?

✅ Before You Answer

• Verify which component is directly in the main air flow path before the air starting motor. • Decide which listed fault would most directly cause both low air flow and slow turning at the same time. • Confirm that an air‑bound fuel system affects combustion, not the amount of air passing through the starting motor.

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Question 1 of 20

The in-line strainer basket element is severely restricted.

The air-starting motor vanes are stuck in their slots.

The in-line lubricator siphon tube is severely restricted.

The fuel injection system piping is air-bound.

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Question 1 / 2066636eef28f7522a1c51fe2a

Question 1 of 2066636eef28f7522a1c51fe2a

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Question 1 of 20

66636eef28f7522a1c51fe2a

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🔍 Key Concepts

💭 Think About

✅ Before You Answer

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