MCQs of System Components, Hydraulic Oils, Fluid Properties and Filter (Oil Hydraulics and Pneumatics - 2171912)

Showing 21 to 30 out of 43 Questions

21.

At which pressure, petroleum oil used in hydraulic systems gets compressed by 1/2%?

22.

A fluid used in hydraulic systems should have_____.

(a)	Low oxidation resistance
(b)	High oxidation resistance
(c)	High oxidation enhancing the ability
(d)	All of the given

23.

How is the water content in High Water Fluids (HFA) compared to oil content?

(a)	More oil than water
(b)	Oil and water are in the same proportion
(c)	More water than oil
(d)	Contains only water

24.

What is the disadvantage of petroleum-based fluids?

25.

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

26.

The highest temperature at which a fluid in a hydraulic system flows is called its pour point.

(a)	True
(b)	False

27.

What is the 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 given

28.

High viscosity fluids have_____.

29.

In industrial applications, hydraulic fluids have viscosity grade ranging from________.

30.

Volumetric efficiency is the ratio of_______.

(a)	Theoretical flow rate to actual flow rate
(b)	Actual flow rate to theoretical flow rate
(c)	Actual fluid power to pump input power
(d)	None of the given

Showing 21 to 30 out of 43 Questions