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Fluid Mechanics

In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is_________________?

Fluid Mechanics /
In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is_________________?

A. 22.5 m/sec
B. 33 m/sec
C. 40 m/sec
D. 90 m/sec

In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is_________________? Read More »

Fluid Mechanics

The horizontal component of force on a curved surface is equal to the_______________?

Fluid Mechanics /
The horizontal component of force on a curved surface is equal to the_______________?

A. product of pressure intensity at its centroid and area
B. force on a vertical projection of the curved surface
C. weight of liquid vertically above the curved surface
D. force on the horizontal projection of the curved surface

The horizontal component of force on a curved surface is equal to the_______________? Read More »

Fluid Mechanics

An open cubical tank of 2 m side is filled with water. If the tank is rotated with an acceleration such that half of the water spills out, then the acceleration is equal to_______________?

Fluid Mechanics /
An open cubical tank of 2 m side is filled with water. If the tank is rotated with an acceleration such that half of the water spills out, then the acceleration is equal to_______________?

A. g/3
B. g/2
C. 2g/3
D. g

An open cubical tank of 2 m side is filled with water. If the tank is rotated with an acceleration such that half of the water spills out, then the acceleration is equal to_______________? Read More »

Fluid Mechanics

If a vessel containing liquid moves downward with a constant acceleration equal to ‘g’ then_____________?

Fluid Mechanics /
If a vessel containing liquid moves downward with a constant acceleration equal to ‘g’ then_____________?

A. the pressure throughout the liquid mass is atmospheric
B. there will be vacuum in the liquid
C. the pressure in the liquid mass is greater than hydrostatic pressure
D. none of the above

If a vessel containing liquid moves downward with a constant acceleration equal to ‘g’ then_____________? Read More »

Fluid Mechanics

A rectangular block 2 m long, 1 m wide and 1 m deep floats in water, the depth of immersion being 0.5 m. If water weighs 10 kN/m3, then the weight of the block is________________?

Fluid Mechanics /
A rectangular block 2 m long, 1 m wide and 1 m deep floats in water, the depth of immersion being 0.5 m. If water weighs 10 kN/m3, then the weight of the block is________________?

A. 5kN
B. lOkN
C. 15 kN
D. 20 kN

A rectangular block 2 m long, 1 m wide and 1 m deep floats in water, the depth of immersion being 0.5 m. If water weighs 10 kN/m3, then the weight of the block is________________? Read More »

Fluid Mechanics

Metacentric height for small values of angle of heel is the distance between the________________?

Fluid Mechanics /
Metacentric height for small values of angle of heel is the distance between the________________?

A. centre of gravity and centre of buoy-ancy
B. centre of gravity and metacentre
C. centre of buoyancy and metacentre
D. free surface and centre of buoyancy

Metacentric height for small values of angle of heel is the distance between the________________? Read More »

Fluid Mechanics

The total pressure on a plane surface inclined at an angle 9 with the horizontal is equal to_______________?

Fluid Mechanics /
The total pressure on a plane surface inclined at an angle 9 with the horizontal is equal to_______________?

A. PA
B. pA sin 9
C. pA cos 9
D. pA tan 9
where p is pressure intensity at centroid of area and A is area of plane surface

The total pressure on a plane surface inclined at an angle 9 with the horizontal is equal to_______________? Read More »

Fluid Mechanics

An open tank contains 1 m deep water with 50 cm depth of oil of specific gravity 0.8 above it. The intensity of pressure at the bottom of tank will be________________?

Fluid Mechanics /
An open tank contains 1 m deep water with 50 cm depth of oil of specific gravity 0.8 above it. The intensity of pressure at the bottom of tank will be________________?

A. 4 kN/m2
B. 10 kN/m2
C. 12 kN/m2
D. 14 kN/m2

An open tank contains 1 m deep water with 50 cm depth of oil of specific gravity 0.8 above it. The intensity of pressure at the bottom of tank will be________________? Read More »

Fluid Mechanics