The crankshafts of medium speed engine...

单项选择题The crankshafts of medium speed engines are almost invariably solid （） from a single piece of steel.

A.forged
B.cast
C.made
D.shrunk

1.单项选择题The crankshaft receives and transmits the full working power of the engine and is subjected to fluctuating （）.

A.bending stresses弯曲应力
B.torsion stresses扭转应力
C.shear stresses剪应力
D.All of the above

2.单项选择题The crankshaft of diesel engine is supported by （）.

A.tension stretch
B.tie rods
C.through bolts
D.main bearings

3.单项选择题The crankshaft is of the semi-built type, with the （） being shrunk into the forged or cast steel crank throws.

A.journal
B.crank-pin
C.main bearing
D.large end of connecting rod

4.单项选择题The crankshaft is of the semi built type, with the journal （） the forged or cast steel crank throws.

A.shrunk into
B.expanded into
C.extended into
D.designated into

5.单项选择题The crankshaft is of the semi built type, with the journal （） the forged or cast steel crank throws.

A.being shrunk into
B.to be shrunk into
C.to be shrunk with
D.shrinking into

6.单项选择题The crankshaft deflection is at first to be （） before and after repair.

A.disassembled
B.renewed
C.measured
D.regulated

7.单项选择题The crank-room cover should not be opened until at least （） minutes after the engine stops.

A.one
B.fifteen
C.sixty
D.ninety

8.单项选择题The crank-room cover should not be opened until at least （） minutes after the engine stops.

A.10
B.15
C.20
D.30

9.单项选择题The crankcase cover should never be allowed to open for investigation when （）

A.the engine stops
B.the engine is running
C.you repair the engine
D.overhauling the engine

10.单项选择题The crankcase can not be opened （）the parts have been cooled down.

A.if
B.as
C.unless
D.when