Test: Fluid Mechanics Level - 2
25 Questions MCQ Test Mechanical Engineering SSC JE (Technical) | Test: Fluid Mechanics Level - 2
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Fluid is a substance which offers no resistance to change of
An ideal flow of any fluid must fulfill the following
An ideal flow of any fluid must fulfill the continuity equation i.e Av=constant
Property of a fluid by which its own molecules are attracted is called
Mercury does not wet glass. This is due to property of liquid known as
Correct Answer :- C
Explanation : Mercury does not wet the glass because the cohesive force with the drops is stronger than the adhesive force between the drops and glass.
Property of a fluid by which molecules of different kinds of fluids are attracted to each other is called
The pressure at a point in a fluid will not be same in all the directions when the fluid is
The surface tension of mercury at normal temperature compared to that of water is
For very great pressures, viscosity of most gases and liquids
A balloon lifting in air follows the following principle
The stress-strain relation of the newtoneon fluid is
Surface tension, represented by the symbol γ (alternatively σ or T), is measured in force per unit length. Its SI unit is newton per meter but the cgs unit of dyne per centimeter is also used.
Which of the following meters is not associated with viscosity ?
For manometer, a better liquid combination is one having
For amplifying the deflection in a liquid column manometer, liquids with greater density could be used or one of the limbs of the manometer may be inclined. Commonly used manometric liquids are mercury, water, or alcohol. Some of the important and desirable properties of the manometric liquids are:
- High chemical stability
- Low viscosity
- Low capillary constant
- Low coefficient of thermal expansion
- Low volatility
- Low vapor pressure
- Low surface tension
The property of fluid by virtue of which it offers resistance to shear is called
The ratio of absolute viscosity to mass density is known as
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