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

Related Mcqs:

1. A vertical rectangular plane surface is submerged in water such that its top and bottom surfaces are 1.5 m and 6.0 m res-pectively below the free surface. The position of center of pressure below the free surface will be at a distance of________________?

   A. 3.75 m
   B. 4.0 m
   C. 4.2m
   D. 4.5m

2. 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

3. The position of center of pressure on a plane surface immersed vertically in a static mass of fluid is______________?

   A. at the centroid of the submerged area
   B. always above the centroid of the area
   C. always below the centroid of the area
   D. none of the above

4. The depth ‘d’ below the free surface at which the point velocity is equal to the average velocity of flow for a uniform laminar flow with a free surface, will be_________________?

   A. 0.423 D
   B. 0.577 D
   C. 0.223 D
   D. 0.707 D

   where D is the depth of flow

5. 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

6. The major loss of energy in long pipes is due to_______________?

   A. sudden enlargement
   B. sudden contraction
   C. gradual contraction or enlargement
   D. friction

7. A closed tank containing water is moving in a horizontal direction along a straight line at a constant speed. The tank also contains a steel ball and a bubble of air. If the tank is decelerated horizontally, then________________?

   1. the ball will move to the front
   2. the bubble will move to the front
   3. the ball will move to the rear
   4. the bubble will move to the rear
   Find out which of the above statements are correct ?

   A. (1) and (2)
   B. (1)and(4)
   C. (2) and (3)
   D. (3) and (4)

8. 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

9. The boundary layer thickness at a distance of l m from the leading edge of a flat plate, kept at zero angle of incidence to the flow direction, is O.l cm. The velocity outside the boundary layer is 25 ml sec. The boundary layer thickness at a distance of 4 m is__________________?

   A. 0.40 cm
   B. 0.20 cm
   C. 0.10 cm
   D. 0.05 cm

   Assume that boundary layer is entirely laminar

10. For laminar flow in circular pipes, the Darcy’s friction factor f is equal to_________________?

    A. 16/Re
    B. 32/ Re
    C. 64/ Re
    D. none of the above where R,, is Reynolds number