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________________?

Related Mcqs:

1. 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

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. Surge wave in a rectangular channel is an example of_________________?

   1. steady flow
   2. unsteady flow
   3. uniform flow
   4. non-uniform flow
   The correct answer is?

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

4. Due to each end contraction, the discharge of rectangular sharp crested weir is reduced by________________?

   A. 5%
   B. 10%
   C. 15%
   D. 20%

5. 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

6. The discharge over a broad crested weir is maximum when the depth of flow is_______________?

   A. H/3
   B. H/2
   C. 2 H/5
   D. 2 H/3

   where H is the available head

7. 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

8. 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

9. Two pipes of same length and diameters d and 2d respectively are connected in series. The diameter of an equivalent pipe of same length is________________?

   A. less than d
   B. between d and 1.5 d
   C. between 1.5 d and 2d
   D. greater than 2d

10. For laminar flow in a pipe of circular cross-section, the Darcy’s friction factor f is________________?

    A. directly proportional to Reynolds number and independent of pipe wall roughness
    B. directly proportional to pipe wall roughness and independent of Reynolds number
    C. inversely proportional to Reynolds number and indpendent of pipe wall roughness
    D. inversely proportional to Reynolds number and directly proportional to pipe wall roughness