题目内容

Which factor determines the ring dam size for a fuel oil, tubular bowl type, centrifugal purifier？

A. The viscosity of the fuel.
B. The quantity of water to be removed from the fuel.
C. The specific gravity of the fuel.
D. The quantity of dirt to be removed from the fuel.

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A. 负；企业雇用更少的工人
B. 正；闲暇的机会成本上升
C. 正；闲暇的机会成本下降
D. 负；家庭工作更长时间
E. 正；企业提供更多的岗位

A. stop the fuel oil booster pump
B. engage the jacking gear
C. secure the lube oil pump
D. shut off the fuel at the settling tank