Engine : Motor Plants and Auxiliary Boilers - 324/947
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| The opening of an exhaust valve on a modern, large, low-speed, main propulsion diesel engine, may be actuated by __________. |
| A) direct action of the overhead camshaft |
| B) compressed air pressure |
| C) hydraulic "push rods" |
| D) direct action of the main piston moving down |
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