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

Related Mcqs:

1. 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

2. The theoretical value of coefficient of contraction of a sharp edged orifice is_______________?

   A. 0.611
   B. 0.85
   C. 0.98
   D. 1.00

3. In a Sutro weir, the discharge is proportional to________________?

   A. H1/2
   B. H3/2
   C. H5/2
   D. H

   where H is head

4. Coefficient of contraction for an external cylindrical mouthpiece is_________________?

   A. 1.00
   B. 0.855
   C. 0.7H
   D. 0.611

5. 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

6. 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)

7. 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

8. Which of the following is used to measure the discharge ?

   A. current meter
   B. venturimeter
   C. pitot tube
   D. hotwire anemometer

9. The discharge through a V- notch varies as______________?

   A. H1/2
   B. H3’2
   C. H5/2
   D. H5’4 where H is head

10. The discharge of a liquid of kinematic viscosity 4 cm2/sec through a 8 cm dia-meter pipe is 3200n cm7sec. The type of flow expected is__________________?

    A. laminar flow
    B. transition flow
    C. turbulent flow
    D. not predictable from the given data