17. 推進軸系中間軸承的潤滑方式，由油盤式取代油環式的潤滑方式，其優點為何？ (A) 防止滑油漏出軸承 (B) 減少軸頸的的磨損 (C) 在低轉速時潤滑效果較好 (D) 使其具有較高的剛度

25. For a diesel engine an initial downward stroke of the piston draws in the air to charge the cylinder, which is followed by the compression stroke, with the fuel being injected as top dead center is approached, then a downward power stroke, and an upward exhaust stroke. Which type of engine is called for this operation? (A) Two-stroke engine (B) Four-stroke engine (C) Supercharging engine (D) Ideal cycle engine

17. 推進軸系中間軸承的潤滑方式，由油盤式取代油環式的潤滑方式，其優點為何？
(A) 防止滑油漏出軸承
(B) 減少軸頸的的磨損
(C) 在低轉速時潤滑效果較好
(D) 使其具有較高的剛度

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