正确答案: C
防止铁梨木产生裂纹
题目:修船时,抽出艉轴后立即用湿草包填塞于艉轴承内,这是为了()。
查看原题 查看所有试题
学习资料的答案和解析:
[单选题]在偶然故障期内,故障是否发生,是()。
无法预测
[单选题]对筒状活塞式柴油机,在未装活塞环的条件下,活塞位于近上、下止点位置时,活塞裙部与气缸内孔单边最小间隙应不小于()。
该处总间隙的25%
[单选题]螺旋桨0.4R以内的缺陷()修理。
一般不可焊补
[单选题]Emulsion oils and sodium nitrite are both approved additives, but () cannot be used if any pipes are galvanized or if soldered joints exist.
the latter
[单选题]The oil quantity for bearing lubrication should be applied in such an amount as to be sufficient to carry away the () caused by the friction at the bearings.
heat
[单选题]The purpose of the delivery check valve used in a diesel fuel injection jerk pump is to ().
assist in a quick cutoff of fuel injection