Engine_2014 : Motor Plants and Auxiliary Boilers - 1904/2614
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| Engines having a bore exceeding 250 mm, but not exceeding 300 mm are to have at least __________ . |
| A) three compression rings per piston and the minimum of two oil scraper rings |
| B) one intake and one exhaust valve per cylinder provided no other means of scavenging is used |
| C) one explosion relief valve in way of each alternate crank throw, with a minimum of two valves |
| D) one crankshaft except in cases where an opposed piston design is required |
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