Fluid Mechanics Mcqs

MCQ: 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________________?

1. 4 kN/m2
2. 10 kN/m2
3. 12 kN/m2
4. 14 kN/m2

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

1. PA
2. pA sin 9
3. pA cos 9
4. pA tan 9

MCQ: Centre of buoyancy always_________________?

1. coincides with the centre of gravity
2. coincides with the centroid of the volume of fluid displaced
3. remains above the centre of gravity
4. remains below the centre of gravity

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

1. centre of gravity and centre of buoy-ancy
2. centre of gravity and metacentre
3. centre of buoyancy and metacentre
4. free surface and centre of buoyancy

MCQ: 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________________?

1. 5kN
2. 10kN
3. 15 kN
4. 20 kN

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

1. the pressure throughout the liquid mass is atmospheric
2. there will be vacuum in the liquid
3. the pressure in the liquid mass is greater than hydrostatic pressure
4. none of the above

MCQ: 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_______________?

1. g/3
2. g/2
3. 2g/3
4. g

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

1. product of pressure intensity at its centroid and area
2. force on a vertical projection of the curved surface
3. weight of liquid vertically above the curved surface
4. force on the horizontal projection of the curved surface

MCQ: The eddy viscosity for turbulent flow is______________?

1. a function of temperature only
2. a physical property of the fluid
3. dependent on the flow
4. independent of the flow

MCQ: 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_________________?

1. 22.5 m/sec
2. 33 m/sec
3. 40 m/sec
4. 90 m/sec