1. Weirs are normally used to calculate

- headloss
- volume
- velocity
- discharge

2. How many types of weirs are there based on the shape of the crest?

- 6
- 4
- 5
- 3

3. A stream has a width of 30m, depth of a 3 m and a mean velocity of 1.25 m/sec. What is the height of a weir to be built on the stream floor so as to cause an afflux of 1 m? Assume value of discharge coefficient as 0.95.

- 3.594 m
- 2.787m
- 4.312 m
- 1.956 m

4. Discharge over an ogee weir remains the same as that of

- Sharp crested weir
- Triangular weir
- Drowned weir
- Cipolletti weir

5. The Francis formula for the discharge over cipolletti weir is

- 1.84 LH
^{1/2} - 1.84 LH
^{3/2} - 1.84 LH
- 1.84 LH
^{5/2}

6. The overflowing sheet of water on a weir is called

- Nappe
- Head
- Crest
- Upstream

7. Triangular weir is also called

- trigonometri1c
- ogee
- v-notch
- isolated

8. The weir is always aligned at right angle to the direction of the river flow because

- it ensure less length of weir
- it gives good discharging capacity
- it is economical
- it ensure less length, good discharge and economical

9. A suppressed sharp crested weir is 0.6 m high and discharges water at a head of 1.2 m. The coefficient of discharge of this weir is

- 0.701
- 0.611
- 0.761
- 0.736

10. The cipolletti weir is a ___________ weir.

- Triangular
- Trapezoidal
- Circular
- Rectangular

11. Barrage differs from Weir when

- major part by gates and minimum or nil part by shutters
- equal part of pounding by both crest and gates
- minimum or nil part of pounding by gates and major part by crest
- major part of pounding by gates and minimum or nil part of crest

12. The discharge over a broad crested weir is maximum when the depth of flow is

- H/3
- H/2
- 2H/3
- 2H/5

13. A Cipolletti weir is a

- rectangular weir with sharp edges
- high triangular notch
- trapezoidal notch with 45° slopes
- trapezoidal notch with sides inclined at 1H : 4V

14. For a broad crested weir, if discharge is maximum for available head of 24 m, then what would be the critical depth of weir?

- 8 m
- 12 m
- 16 m
- 24 m

15. Suppressed weir has

- crest length less than width of channel
- crest length more than width of channel
- crest length equal to width of channel
- crest length can be less or more than width channel

16. In a Sarda type fall, the rectangular crest, may be used for discharge upto

- 6 cumecs
- 10 cumecs
- 14 cumecs
- 20 cumecs

17. A weir, generally, uses as a spillway of a dam is

- submerged weir
- ogee weir
- narrow crested weir
- broad crested weir

18. Aeration of nappe is necessary for which type of weirs?

- contracted rectangular
- suppressed weir
- submerged contracted rectangular
- triangular

19. Which of the following are the causes of failure of weirs?

- Rupture of floor due to uplift
- Rupture of floor due to suction caused by standing wave
- Scour on the upstream and downstream of the weir

- i and ii only
- i and iii only
- i, ii and iii
- ii and iii only

20. A Cipolletti weir has a side slope of

- 1V : 2H
- 1V: 1H
- 1H : 2V
- 1H : 4V

21. When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as

- Narrow crested weir
- Broad crested weir
- Ogee weir
- Submerged weir

22. Condition for broad crested weir is

- 2b > H
- 2b < H
- H < b
- b = 2H