In a fixed displacement axial piston hydraulic motor, the speed is varied by（）
1、Excessive piston ring wear in a diesel
Excessive piston ring wear in a diesel engine will cause（）Ahigh lube oil viscosityBincreased lube oil consumptionClow lube oil temperaturesDhigh firing pressure
2、Piston compression rings used in a die
Piston compression rings used in a diesel engine function to （）Atransfer heat from the cylinder to the pistonBscrape oil from the sides of the pistonCseal the combustion space from the crankcasesDprevent any piston contact with the cylinder liner
3、An axial轴向 piston pump differs from a
An axial轴向 piston pump differs from a radial piston pump as the pistons of an axial piston pump are positioned （）.Aradially from the shaft...
4、With reference to an axial piston pump
With reference to an axial piston pump, which one of the following statements is true?（）AThe cylindrical barrel is coupled to the motorBThe cylindrical barrel has an odd number of boresCThe bores end in socketsDThe sockets fit in the swash plate
5、The delivery rate of an axial-piston h
The delivery rate of an axial-piston hydraulic pump is controlled by varying the position of the （）.Asliding blockBpintleCreaction ringDtilting box or swash plate
6、In plotting a running fix，how many fix
In plotting a running fix，how many fixed objects are needed to take your lines of position from? （）AThreeBTwoCOneDNone