單項選擇題

The ignition quality of a fuel oil is an important operational consideration because it（）

A.indicates the amount of abrasive material in the fuel
B.affects the starting ability of a cold engine
C.determines the amount of fuel penetration engine
D.affects the compression ratio of an operating engine

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單項選擇題

On a large low-speed main propulsion diesel engine, lower main bearing wear is usually measured by using a/an （）

A.dial indicator
B.outside caliper
C.bridge gauge
D.tram rod

單項選擇題

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 （）

A.telescoping
B.ring ‘snap’ gauge
C.inside vernier caliper
D.outside micrometer