Today, crankshafts for large 2-stroke

1、Small crack in the crankshaft bearing

Small crack in the crankshaft bearing surface of a diesel engine are an indication of（）Acorrosion frettingBinsufficient lubricationCabnormal wearDfatigue failure

2、One method of determining crankshaft m

One method of determining crankshaft misalignment is by（）Alaying a straight edge across the crank webs at the crankpin and measuring the dista...

3、The crankshafts on the large modern 2-

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.Aenough；toBtoo；toCsuch；soDso；that

4、The crankshaft receives and transmits

The crankshaft receives and transmits the full working power of the engine and is subjected to fluctuating （）.Abending stresses弯曲应力Btorsion stresses扭转应力Cshear stresses剪应力DAll of the above

5、Passages are drilled in the crankshaft

Passages are drilled in the crankshafts of diesel engines to provide lubricating oil to the （）.Amain bearingsBconnecting rod bearingsCpiston pin bushingsDAll of the above

6、How many power strokes per crankshaft

How many power strokes per crankshaft revolution are there in an eight cylinder, two stroke/cycle diesel engine?（）AOneBTwoCFourDEight