MCQOPTIONS
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MCQOPTIONS
This section includes 47 Mcqs, each offering curated multiple-choice questions to sharpen your Irrigation Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The type of canal alignment which involves maximum CD works is a ______________ |
| A. | ridge canal |
| B. | contour canal |
| C. | side slope canal |
| D. | both ridge and contour canal |
| Answer» C. side slope canal | |
| 2. |
Inlets and Outlets are inferior to aqueduct or super-passage type of work. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 3. |
The selection of the CD works depends on?i. Selecting canal alignmentii. Position of water-table and availability of dewatering equipmentiii. Suitability of soil for embankmentiv. Availability of funds |
| A. | i and ii |
| B. | i, ii and iv |
| C. | i, ii and iii |
| D. | i, ii, iii and iv |
| Answer» E. | |
| 4. |
In order to reduce the CD works, the artificial canals are generally aligned along the ridgeline. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 5. |
The use of sealing compounds for vertical joints is very successful. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 6. |
What is the most common metal used for water stops? |
| A. | Monel metal |
| B. | Annealed copper |
| C. | Galvanised iron |
| D. | Steel |
| Answer» C. Galvanised iron | |
| 7. |
The number of inlets should be equal to the number of outlets. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 8. |
Which of the following is a disadvantage of CD works carrying the canal over the discharge? |
| A. | The damage caused by floods is not rare |
| B. | The canal is not open for inspection and maintenance |
| C. | The CD works are less liable to damage than the earthwork of the canal |
| D. | During heavy floods, the foundations are susceptible to scour or waterway of the drain may get choked |
| Answer» E. | |
| 9. |
In a syphon aqueduct provided with a pucca bottom floor, the uplift will occur on __________ |
| A. | the roof slab |
| B. | the bottom floor |
| C. | both the roof slab as well as the bottom floor |
| D. | nowhere since the flow is free in the canal as well as in the drainage channel |
| Answer» C. both the roof slab as well as the bottom floor | |
| 10. |
Which CD work is generally adopted when the drainage discharge is small and the drain crosses the canal with its bed level equal to or slightly higher than the canal FSL? |
| A. | Syphon Aqueduct |
| B. | Level crossing |
| C. | Inlets and outlets |
| D. | Aqueduct |
| Answer» D. Aqueduct | |
| 11. |
The drainage water is sometimes allowed to join the canal water to augment canal supplies through a hydraulic structure is called as ________________ |
| A. | canal outlet |
| B. | canal inlet |
| C. | module |
| D. | level crossing |
| Answer» C. module | |
| 12. |
Which of the following is a movement joint with complete discontinuity in both reinforcement and concrete and intended to accommodate either expansion or contraction of the structure? |
| A. | Contraction joint |
| B. | Expansion joint |
| C. | Sliding joint |
| D. | Construction joints |
| Answer» C. Sliding joint | |
| 13. |
The expansion joints in floors and walls should normally be provided at a spacing of not more than ___________ |
| A. | 30 m |
| B. | 45 m |
| C. | 50 m |
| D. | 55 m |
| Answer» B. 45 m | |
| 14. |
What is the maximum expansion or contraction allowed for the joint filler material with an initial gap of about 30 mm? |
| A. | 10 mm |
| B. | 5 mm |
| C. | 20 mm |
| D. | 30 mm |
| Answer» B. 5 mm | |
| 15. |
A partial contraction joint is the one in which? |
| A. | both the concrete and reinforcing steel are interrupted |
| B. | only the concrete is interrupted |
| C. | only the reinforcement is interrupted |
| D. | none of them is interrupted |
| Answer» C. only the reinforcement is interrupted | |
| 16. |
Which of the following is not a movement joint? |
| A. | Contraction joint |
| B. | Expansion joint |
| C. | Sliding joint |
| D. | Construction joints |
| Answer» E. | |
| 17. |
Which of the following is usually adopted for contraction and construction joints? |
| A. | Rubber water bars |
| B. | V-shape metal bars |
| C. | PVC water bars |
| D. | Z-shape metal bars |
| Answer» D. Z-shape metal bars | |
| 18. |
The greater is the fluming, the greater is the length of upstream and downstream transition wings. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 19. |
Which of the following wings protect the earthen slopes of the canal and also guide the drainage water? |
| A. | Canal wings |
| B. | Land wings |
| C. | River wings |
| D. | Side wings |
| Answer» D. Side wings | |
| 20. |
A siphon aqueduct is constructed at a canal crossing site where drainage HFL was 212.2 m by allowing an afflux of 0.4 m at high flood discharge. At this site, the water level downstream of the crossing at the same high flood will be _________ |
| A. | 212.2 m |
| B. | 212.6 m |
| C. | 211.8 m |
| D. | It cannot be predicted |
| Answer» B. 212.6 m | |
| 21. |
Which of the following is a movement joint with deliberate discontinuity but no initial gap? |
| A. | Contraction joint |
| B. | Expansion joint |
| C. | Sliding joint |
| D. | Construction joints |
| Answer» B. Expansion joint | |
| 22. |
The canal alignment is finalized only after finalizing the CD works. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 23. |
The relative bed levels of the canal and the drainage may be changed and manipulated by _________________ |
| A. | changing the alignment |
| B. | changing the positions of the water table |
| C. | altering the head level |
| D. | use of dewatering equipment |
| Answer» B. changing the positions of the water table | |
| 24. |
Which of the following is a disadvantage of CD works carrying drainage over the canal? |
| A. | The arrangement is generally constructed when the drain is very big as compared to the section of the canal |
| B. | The damage caused by floods is not rare |
| C. | The CD works are more liable to damage than the earthwork of the canal |
| D. | The perennial canal is not open to inspection or maintenance |
| Answer» E. | |
| 25. |
Calculate the value of hydraulic mean radius for a channel designed by Lacey’s theory which has a mean velocity of 1m/sec. The silt factor can be taken as unity. |
| A. | 1 m |
| B. | 0.5 m |
| C. | 2 m |
| D. | 2.5 m |
| Answer» E. | |
| 26. |
Calculate the depth of cut-off for scour holes for an irrigation channel of F.S.Q equal to 354 cumecs and H.F.Q of natural drainage equal to 600 cumecs. Assume the value of friction factor as 1. |
| A. | 7 m |
| B. | 7.5 m |
| C. | 10.5 m |
| D. | 8 m |
| Answer» D. 8 m | |
| 27. |
What is Lacey’s equation for fixing the approximate value of the required waterway for the drain? |
| A. | P = 4.75 Q |
| B. | P = 4.57 Q |
| C. | P = 4.75 Q^1/2 |
| D. | P = 4.57 Q^1/2 |
| Answer» D. P = 4.57 Q^1/2 | |
| 28. |
In which of the following arrangement, the perennial drainage discharge is advantageously used? |
| A. | Level crossing |
| B. | Inlets and Outlets |
| C. | Syphon |
| D. | Aqueduct |
| Answer» B. Inlets and Outlets | |
| 29. |
The head loss through a siphon barrel is usually given by Unwin’s formula by neglecting velocity of approach as HL = [1 + F₁ + F₂. L/R] V²/2g, where F₁ and F₂ respectively represent the coefficient of head losses due to? |
| A. | Barrel friction and entry |
| B. | Entry and barrel friction |
| C. | Barrel friction and exit |
| D. | Exit and barrel friction |
| Answer» C. Barrel friction and exit | |
| 30. |
In reinforced concrete floors, the movement joints should normally be spaced at a maximum spacing of ____________ |
| A. | 6 m |
| B. | 4.5 m |
| C. | 7.5 m |
| D. | 9 m |
| Answer» D. 9 m | |
| 31. |
The crossing arrangement preferably made at the junction of a huge canal and a river stream carrying a short-lived high flood discharge at almost equal bed levels is a __________ |
| A. | super passage |
| B. | aqueduct |
| C. | level crossing |
| D. | canal syphon |
| Answer» D. canal syphon | |
| 32. |
The floor of a siphon aqueduct needs to be designed for conditions when?i. The canal and drainage are flowing fullii. The canal is full and there is no drainage dischargeiii. The canal is empty and drainage discharge is full |
| A. | i only |
| B. | ii only |
| C. | i and ii |
| D. | ii and iii |
| Answer» E. | |
| 33. |
Joint sealing compounds are impermeable ductile materials which are required to ___________________ |
| A. | increase the bond |
| B. | provide a watertight seal by adhesion to concrete |
| C. | shorten the water path |
| D. | avoid the risk of a fault in an embedded water bar |
| Answer» C. shorten the water path | |
| 34. |
In a siphon aqueduct, the worst condition of uplift on the floor occurs when ________ |
| A. | the canal is full and the drainage empty with the water table at drainage bed |
| B. | the canal and drainage are flowing full |
| C. | the canal is empty and the drainage full with the water table at drainage bed |
| D. | the canal is full and the drainage empty with water table below the floor |
| Answer» D. the canal is full and the drainage empty with water table below the floor | |
| 35. |
To reduce the cost of the CD works we resort to _____ |
| A. | fluming |
| B. | blocking of drain |
| C. | cut-off |
| D. | lifting of canal water |
| Answer» B. blocking of drain | |
| 36. |
The maximum permissible reduction in the waterway from Lacey’s perimeter is _______ |
| A. | 15% |
| B. | 20% |
| C. | 25% |
| D. | 30% |
| Answer» C. 25% | |
| 37. |
Which of the following method is applicable for the design of channel transition when the water depths of the flumed and unflumed section are the same or maybe different? |
| A. | Mitra’s method of design of transitions |
| B. | Chaturvedi’s method of design of transitions |
| C. | Hind’s method of design of transitions |
| D. | The general method of design of transitions |
| Answer» D. The general method of design of transitions | |
| 38. |
The permissible velocity through the barrels is generally limited to _____________ |
| A. | 1.5 to 2 m/sec |
| B. | 2 to 3 m/sec |
| C. | 2.5 to 3 m/sec |
| D. | 1 to 2 m/sec |
| Answer» C. 2.5 to 3 m/sec | |
| 39. |
Which of the following is sometimes used in expansion joints to avoid the risk of fault in an embedded water bar? |
| A. | Joint fillers |
| B. | Joint sealers |
| C. | Joint covers plates |
| D. | Water stops |
| Answer» D. Water stops | |
| 40. |
What provides a permanent watertight seal during the whole range of joint movement? |
| A. | Water bars |
| B. | Joint fillers |
| C. | Joint covers plates |
| D. | Joint sealers |
| Answer» B. Joint fillers | |
| 41. |
In case of the sealing joint, the lower part of the joint is occupied by joint filler. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 42. |
Which of the following can be used as support for an effective joint sealing compound in floor and floor joints? |
| A. | Joint fillers |
| B. | Water bars |
| C. | Joint sealers |
| D. | Primers |
| Answer» B. Water bars | |
| 43. |
A Super passage is the reverse of ______________ |
| A. | syphon |
| B. | aqueduct |
| C. | inlets and outlets |
| D. | syphon Aqueduct |
| Answer» C. inlets and outlets | |
| 44. |
Which of the following CD works carry drainage over the canal? |
| A. | Aqueduct and Syphon Aqueduct |
| B. | Super passage and Syphon |
| C. | Level-crossing and inlets outlets |
| D. | Canal Syphon and Aqueduct |
| Answer» C. Level-crossing and inlets outlets | |
| 45. |
The canal water flows freely under gravity in which of the following CD works? |
| A. | Aqueduct and Super passage |
| B. | Super passage and Syphon |
| C. | Canal Syphon and Aqueduct |
| D. | Level-crossing and inlets outlets |
| Answer» B. Super passage and Syphon | |
| 46. |
The following data is available at the proposed site of a canal crossing. The most appropriate and economical CD work at the above site will be: |
| A. | An aqueduct |
| B. | A super-passage |
| C. | A siphon aqueduct |
| D. | A siphon |
| Answer» E. | |
| 47. |
Which of the following statement is not correct about canal syphon? |
| A. | FSL of the canal is much above than the bed level of the drainage trough |
| B. | To minimize the trouble of silting, a ramp is provided at the exit |
| C. | The canal water flows under symphonic action |
| D. | For siphoning small discharges, barrels are adopted |
| Answer» E. | |