单选题 Each crank is made up of two crank webs joined by a common ____ to which the bottom end bearing is fitted.

单选题 For an ordinary four-stroke engine the inlet valves open ____.

单选题 Fuel injected into a diesel engines cylinder is ignited by ____.

单选题 ____ scavenge means both exhaust ports and scavenge ports are arranged to the same side.

单选题 Diesel engines are started by supplying ____ into the cylinders in the appropriate sequence for the required direction.

单选题 During working, when the piston is near the ____, the air ignites the fine spray of fuel.

单选题 During the suction stroke, the piston is moving ____.

单选题 In a four-stroke engines the camshaft rotates at ____.

单选题 Four strokes consist of suction, compression, ____ and exhaust stroke.