Which of the following problems may be encountered by using an oil having a viscosity higher than that specified for an operating hydraulic system?A.External seal leakageB.Hunting due to fast responseC.Hydraulic oil film breakdownD.Increased power consumption
Which of the following problems may be encountered by using an oil having a viscosity higher than that specified for an operating hydraulic system?
A.External seal leakage
B.Hunting due to fast response
C.Hydraulic oil film breakdown
D.Increased power consumption
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Which of the following may better check students′ ability of using a grammatical structureA.Having them work out the rule.B.Having them give some examples.C.Having them explain the meaning.D.Having them explain the structure.
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