Regulation Modules and Canal Structure topics include: Ccanal regulation, canal escapes types, metering flumes and outlet types, non modular outlet types, semi modules types, rigid modules and cattle crossings types.   Canal regulation works are structures that control and regulate the depths, velocities, and discharges of canals. These structures ensure the efficient functioning of a canal irrigation system.  Canal regulation is the process of distributing water from the main canal to branches. The distribution of flow depends on the water demand of various channels.  Regulating... Show more

Regulation Modules and Canal Structure topics include: Ccanal regulation, canal escapes types, metering flumes and outlet types, non modular outlet types, semi modules types, rigid modules and cattle crossings types.
 

Canal regulation works are structures that control and regulate the depths, velocities, and discharges of canals. These structures ensure the efficient functioning of a canal irrigation system. 

Canal regulation is the process of distributing water from the main canal to branches. The distribution of flow depends on the water demand of various channels. 
Regulating structures are designed to help maintain water levels in canals by controlling the inflow and outflow of water. By adjusting the gates or barriers in the structures, the flow of water can be regulated to maintain the desired water levels. 
A canal obtains its share of water from the pool behind a barrage through a structure called the canal head regulator. This is also a regulation structure for controlling the amount of water passing into the canal. 

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Irrigation Engineering Practice Test: Regulation Modules and Canal Structure

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25 Questions

1. Calculate the minimum modular head loss involved in ASOM if the head measured from the upstream water level in the distributary is 1.5 m and the width of the throat as 0.16 m.

1.50 m1.15 m1.00 m1.07 m

2. Metering flumes works on the principle of venturi meter.

MaybeFalseTrueDon't Know

3. The discharge range of Gibb’s module varies from ____________

0.55 to 0.75 cumec0.03 to 0.45 cumec0.01 to 0.03 cumec0.45 to 0.55 cumec

4. What is the formula for discharge when venturi meter is used?

\(Q = C_d (a_1/\sqrt{(a_1^2 – a_2^2)})\sqrt{2gh}\) \(Q = C_d (a_1 * a_2/\sqrt{(a_1^2 – a_2^2)})\sqrt{2gh}\) \(Q = (a_1 * a_2/\sqrt{(a_1^2 – a_2^2)})\sqrt{2g}\) \(Q = C_d (a_2/\sqrt{(a_1^2 – a_2^2)})\sqrt{2h}\)

5. Which type of flume does the diagram depict?

Free Flow Venturi FlumeVenturi FlumeStanding Wave FlumeModular Venturi Flume

6. What is the formula for velocity through the pipe?

Total loss of head = Frictional loss + Velocity head at exitTotal loss of head = Entry loss + Velocity head at exitTotal loss of head = Entry loss + Frictional lossTotal loss of head = Entry loss + Frictional loss + Velocity head at exit

7. A baffle wall is a sort of weir constructed at the end of the cistern to:
i. To prevent any excess amount of discharge likely to pass through the module
ii. The baffle plates are inserted in the eddy chamber sloping from the outer wall towards the inner wall
iii. Head up the water to its upstream to such a height that hydraulic jump is formed
Which of the following statement is correct?

i, ii and iiii and iiii and iii only

8. For canals carrying smaller water depths, a ramp is provided for the entry and exit as cattle crossings.

Don't KnowMaybeTrueFalse

9. What is the main purpose of the canal escape?

To Remove Surplus WaterTo Maintain Uniform Flow in the CanalTo Help for Proper Hydraulic JumpTo Maintain Constant Velocity of the Flow

10. In case of breaches in the canal, the escape present in the upstream of the breach is opened.

Don't KnowMaybeTrueFalse

11. What is the purpose of the regulator type escape?

To Remove Excess SiltFor Distribution of Discharge for the CanalsTo Perform Proper Hydraulic JumpTo Maintain Uniform Flow in the Canal

12. What is the range of modular outlet called?

Minimum Modular HeadModular RatioWorking RangeMinimum Loss of Head

13. For which type of class of outlets the sensitivity is zero?

Semi ModulesRigid ModulesNon-modular OutletsFlexible Modules

14. How many numbers of conditions of flow are to be followed while designing the cross regulator and head regulator?

4132

15. Open sluice and drowned pipe outlet come under which class of modules?

Non-modular OutletsRigid ModulesModular OutletsSemi Modules

16. The principal feature of an ASOM is similar to those of a flume regulator.

Don't KnowMaybeFalseTrue

17. The outlet should be simple and free from interference by the cultivators.

Don't KnowMaybeTrueFalse

18. The outlet discharge is maintained constant and it is not at all dependent on the water levels in the parent and the field channels in _________________

semi-modular outletmodular outletnon-modular outletproportional outlet

19. How many types of outlets are present?

5342

20. Which module is mostly adopted and is considered to be the best of all the modules?

Adjustable orifice semi-moduleFree pipe outletOpen flume outletVenturi-flume outlet

21. Which of the following is not a type of semi-modules?

Free pipe outletOpen flume outletKennedy’s Gauge outletGibb’s module

22. Calculate the discharge through an open flume outlet for the following data:
Coefficient of discharge = 1.71
Width of the throat = 0.15 m
Head over the crest measured from FSL of distributary = 1.8 m

0.62 lit/sec0.82 cumecs6.2 lit/sec0.62 cumecs

23. By what structures the regulator can control the supplies entering the off take channel?

Piers and PlanksSluice GatesDamsFalls

24. What is the slope of a throat?

From 0.5:1 to 1:1From 1:1 to 2:1From 1:1 to 3:1From 1:3 to 1:2

25. What is the main drawback of standing wave flume?

Loss of HeadLoss of DischargeLoss of Hydraulic JumpLoss of Velocity of Flow