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Fluid-mechanics Questions Set 57:

Quiz Mode

How is a stage represented in a reaction turbine?

size of the turbine

type of fluid

number of entries of steam

each row of blades

Solution:

The actual path followed by a fluid particle as it moves during a period of time is called the:

streak line

filament line

pathline

streamline

Solution:

The velocity field in a flow system is given by v = 2i + (x + y)j + (xyz)k. The acceleration of the fluid at (1,1,2) is

j + k

4j + 10k

2i + 10k

4i + 12k

Solution:

If water from a big tank enters a pipe with a velocity of 1.09 m/s, find the loss due to entry of water into the pipe. (Take g = 9.81 m/s²)

1.2 m

1.188 m

0.09 m

0.026 m

Solution:

If the velocity, bulk modulus of elasticity and mass density of a fluid are denoted by U, K, and ρ respectively, then the Mach number is given by

U√ρ/√K

ρ√U/√K

K√U/√ρ

U√K/√ρ

Solution:

The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point is called

path line

streak line

filament line

streamline

Solution:

In which method of describing fluid motion does the observer remain stationary and observe changes in the fluid parameters at a particular point only?

Lagrangian method

Eulerian method

Stationary method

All of the above

Solution:

A cylindrical vessel with a constant cross-sectional area of 1 m² is rotated about its vertical axis such that the liquid in the vessel is about to spill. If the height of the vessel is 2 m and the height of the paraboloid formed by the liquid surface is 1 m, then the volume (m³) of liquid in the vessel will be

1.5

0.5

Solution:

A right-circular cylinder, open at the top, is filled with a liquid of relative density 1.2. The cylinder is rotated about its vertical axis at such a speed that half the liquid spills out. The pressure at the center of the bottom will be:

zero

one-fourth of the value when the cylinder was full

half of the value when the cylinder was full

three-fourths of the value when the cylinder was full

Solution:

What is the relationship between frictional resistance and laminar and turbulent flow?

Frictional resistance is independent of the pressure for both laminar and turbulent flows

Frictional resistance is dependent on the pressure for both laminar and turbulent flows

Frictional resistance is independent of the pressure for laminar flow and dependent on the pressure for turbulent flow

Frictional resistance is dependent on the pressure for laminar flow and independent of the pressure for turbulent flow

Fluid-mechanics Questions Set 57:

How is a stage represented in a reaction turbine?

Solution:

The actual path followed by a fluid particle as it moves during a period of time is called the:

Solution:

The velocity field in a flow system is given by v = 2i + (x + y)j + (xyz)k. The acceleration of the fluid at (1,1,2) is

Solution:

If water from a big tank enters a pipe with a velocity of 1.09 m/s, find the loss due to entry of water into the pipe. (Take g = 9.81 m/s²)

Solution:

If the velocity, bulk modulus of elasticity and mass density of a fluid are denoted by U, K, and ρ respectively, then the Mach number is given by

Solution:

The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point is called

Solution:

In which method of describing fluid motion does the observer remain stationary and observe changes in the fluid parameters at a particular point only?

Solution:

Solution:

A right-circular cylinder, open at the top, is filled with a liquid of relative density 1.2. The cylinder is rotated about its vertical axis at such a speed that half the liquid spills out. The pressure at the center of the bottom will be:

Solution:

What is the relationship between frictional resistance and laminar and turbulent flow?

Solution:

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