文档介绍：试题二十二
一、单项选择题：
Which one is connected to the piston?
A. cylinder B. connecting rod C. thrust shaft D. crank shapeed at which resonance can occur is termed ______.
A. maximum speed
B. full speed
C. sea speed
D. critical speed
12.
A crankshaft whose center of gravity coincides with its center line is said to be______.
A. dynamically balanced
B. statically balanced
C. counter balanced
D. resonantly
balanced
13.
______ the repair in so short a time is unknown to us.
A. How they finished
B. How did they finished
C. That how they finished
D. That how did they finished
14. The principle of hydrostatic lubrication has been applied to the cross-head using______.
A. high pressure lubricators B. tie rods C. fuel injectors D. fuel valves
Load control on a diesel engine is accomplished by______.
regulating the speed of the turbocharger
rotating the fuel injector pump plunger
regulating the speed of the fuel oil transfer pump
changing engine timing
A reduction in load on a diesel engine results in ______of speed of the crankshaft.
A. a reduction B. an increase C. an outing D. a downwards
Which of the listed statements is correct concerning the starting of centrifugal pumps?
They should always be started with the discharge valve closed.
They should always be started with the discharge valve