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

Related Mcqs:

1. 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

2. 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

3. 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

4. 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)

5. 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

6. Drag force is a function of________________?

   1. projected area of the body
   2. mass density of the fluid
   3. velocity of the body
   The correct answer is ?

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

7. If the weight of a body immersed in a fluid exceeds the buoyant force, then the body will________________?

   A. rise until its weight equals the buoyant force
   B. tend to move downward and it may finally sink
   C. float
   D. none of the above

8. 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

9. 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

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