单项选择题
A.smaller B.larger C.higher D.lower
The crankshafts on the large modern 2-stroke crosshead ...
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
Because the tie bolts are so close to the crankshaft, s...
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
To prevent excessive （） in the transverse girders, the ...
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
