Afluid should be changed a. when its viscosity changes b. when it becomes contaminated c. at operating temperature d. when its acidity increases e. all of the above

e.All of the above

Explanation:

A fluid should be change

a.When its acidity increase

b.When its become contaminated

c.At operating temperature

Generally fluid is used in fluid power.Fluid power means transmission of power by using pressurized fluids.

Fluid power works on Pascal's and Bernoulli law.

From the above option we can say that all option is right for fluid  .

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