Fluid Characteristics - 1 - MCQs with Answers

Fluid Characteristics – 1 – MCQs with Answers

1. Which of the following statements are true?

1. low viscosity fluids have higher leakage
2. high viscosity fluids have high pressure drop
3. low viscosity fluids consume more power
4. low viscosity leads to wear of components

a. 1 and 2
b. 1, 2 and 3
c. 1, 2 and 4
d. 2, 3 and 4

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2. In industrial applications hydraulic fluids have viscosity grade ranging from

a. 20 to 50
b. 70 to 95
c. 46 to 68
d. 15 to 44

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3. High viscosity fluids have

a. low pressure drop
b. less power consumption
c. slow operation
d. all the above

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4. What is viscosity index?

a. effect of pressure on changes in viscosity
b. effect of temperature on changes in viscosity
c. effect of resistance between two surfaces
d. none of the above

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5. Highest temperature at which a fluid in hydraulic system flows is called its pour point.

a. True
b. False

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6. Which property decides the behavior of fluid when mixed with water?

a. pour point
b. demulsibility
c. viscosity
d. oxidation

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7. For any operation in a hydraulic system the fluid should have pour point

a. 20 ⁰F below the lowest temperature
b. 20 ⁰F above the lowest temperature
c. 20 ⁰C below the lowest temperature
d. 20 ⁰C above the lowest temperature

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