题目内容
（请给出正确答案）
A.20
B.40
C.60
D.80
简答题官方参考答案
（由简答题聘请的专业题库老师提供的解答）
更多“The hydraulic oil most likely to thin out when hot and thick when cold would have a viscos”相关的问题
The rotor of the hydraulic motor rotates at a speed proportional to the _____.
A.flow of oil
B.pressure of oil
C.A and B
D.temperature of oil
Which of the following can be used in hydraulic transmission system？
A.Hydraulic oil
B.Animal oil
C.Light oil
D.Fuel oil
A.dirt
B.fuel oil
C.governor cooling water
D.fuel oil tar(焦油)
Purging air from a hydraulic system is necessary when .
A.adding small amounts of oil to the system
B.the system has been overheated
C.the system has been drained and then filled with new oil
D.the system has been idle for a long period of time
A.the fuel oil
B.the lubricating oil
C.the refrigerating oil
D.the hydraulic oil
A.Constant tension mooring winch system
B.Hatch cover system
C.Watertight door system
D.Internal combustion engine hydraulic starter system
A.pump bearings in poor condition
B.excessively worn actuator-piston packing
C.broken directional control valve centering springs
D.low hydraulic oil viscosity
A.act as a shock absorber
B.maintain the stored oil under pressure
C.act as a base or foundation for the power unit
D.eliminate pressure surges in the system
When the steering gear is in operation, you should ______.
A.check hydraulic oil levels every hour
B.check the rams for overheating
C.check for excessive oil leakage from rams
D.drain water from tele-motor cylinders each watch
A.gums, acids, and varnishes
B.removed by cellulose type filters
C.neutralized by oil additives
D.not removed by absorbent filters
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