【名词&注释】
冷却水(cooling water)、机动性(mobility)、填料函(stuffing box)、活塞杆填料、生命力强
[单选题]双轴系具有高速、()和()的特点。
A. 便于操纵/工作可靠
B. 操纵灵活/生命力强
C. 机动性好/生命力强
D. 操纵灵活/工作可靠
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学习资料:
[单选题]起航时间的长短与()有关。
A. 主机冷却水加温速度
B. 主机燃油加温速度
C. 主机滑油加温速度
D. A+B+C
[单选题]活塞杆填料函安装在气缸底板中心孔中,具有()的作用。Ⅰ.密封扫气空气;Ⅱ.密封燃气;Ⅲ.除油污;Ⅳ.除积炭;Ⅴ.分隔。
A. A.Ⅰ+Ⅱ+Ⅴ
B. B.Ⅰ+Ⅴ
C. C.Ⅱ+Ⅴ
D. D.Ⅰ+Ⅲ+Ⅴ
[单选题]对于活塞杆下端是方形法兰的机型如B&W,如只需解体活塞杆填料函则不需吊出活塞,在曲轴箱内拆掉填料函的()固定螺栓,用专用夹具夹住(),使整个填料函落在夹具的平板上,进行解体。
A. 外圈/活塞杆
B. 内、外圈/活塞杆
C. 外圈/填料函
D. 内、外圈/填料函
[单选题]Dirt in the fuel oil system of a diesel engine can cause ().
A. clogged filters
B. poor combustion
C. overloading of the diesel
D. shock of fuel line
[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.
A. the latter
B. latter
C. former
D. the former
[单选题]Diesel engine main and connecting rod precision bearings are made in halvesEach half exceeds one-half the bearing circumference by a small amountThe small amount is termed ().
A. clearance
B. crush
C. pitch
D. thrust
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