To determine the main bearing clearance of a...

Question 1 of 270705eccefa1bacbc34ba4d475f9

To determine the main bearing clearance of a propulsion diesel engine, you should measure the main bearing shell using a ball anvil outside micrometer and measure the crankshaft journal using a/an __________.

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Question 1 of 27070

🔍 Key Concepts

• Main bearing clearance is the difference between the crankshaft journal diameter and the bearing shell internal diameter • An outside micrometer is used to measure outside diameters (like a shaft journal), while inside tools measure internal diameters/bores • Think about which tool is normally used with a ball anvil outside micrometer to compare journal size to bearing shell size

💭 Think About

• First, decide: is the crankshaft journal an inside or outside dimension? • Which of the listed tools is specifically designed to measure an outside diameter with high precision? • If you already have a ball anvil outside micrometer for the bearing shell, what type of micrometer or gauge would naturally be used for the journal so you can directly compare readings?

✅ Before You Answer

• Be clear whether the crankshaft journal is measured as an outside diameter, not an internal bore • Match each tool: which are for inside measurements and which for outside measurements • Ask yourself: which tool will give a direct micrometer reading of the journal diameter without needing a second measuring instrument?