When using a fuel with a higher than normal sulfur content i

【名词&注释】

加工硬化(work hardening)、轴功率(shaft power)、各向同性(isotropic)、吸入压力(suction pressure)、金属塑性变形(metal plastic deformation)

[单选题]When using a fuel with a higher than normal sulfur content in an auxiliary four stroke diesel engine, you may

A. maintain higher than normal jacket water temperature
B. change the lube oil more frequently than normal
C. maintain a higher air-box temperature than normal
D. maintain a higher air-box pressure than normal

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举一反三：

[单选题]金属塑性变形^{(metal plastic deformation)}后，其性能发生的变化是( )。

A. 加工硬化
B. 各向同性
C. 塑性提高
D. 固溶强化

[单选题]泵排出压力pd=0.55MPa，吸入压力ps=-0.05MPa，流量Q=60m3/h，总效率η=80%，其轴功率为( )。

A. 10kW
B. 12.5kW
C. 10.4kW
D. 8kW

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