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全部科目 > 水路交通运输技能考试 > 海船船员考试 > 船舶管理(轮机专业) > 轮机英语 > 船舶电气与船舶安全

单项选择题

The crankpins and journals were machined and matching holes bored in the webs, which were slightly （） in diameter.

A.smaller
B.larger
C.higher
D.lower

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单项选择题

The crankshafts on the large modern 2-stroke crosshead engines are （）big （）makes as a single unit and so are constructed by joining together individual forgings.

A.enough；to
B.too；to
C.such；so
D.so；that

单项选择题

Because the tie bolts are so close to the crankshaft, some engines employ （）to hold the crankshaft main bearing cap in position instead of conventional studs and nuts.

A.through bolts
B.jack bolts
C.tap bolts
D.fitted bolts

单项选择题

To prevent excessive （） in the transverse girders, the tie bolts are positioned as close to the center of the crankshaft as possible.

A.thermal stresses
B.bending moments
C.thermal loads
D.surface tensions

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