SSC JE Civil Preliminary Exam in January 2018 | Practice test Day – 61 Welcome to your SSC JE Civil 2018 Objective Exam Practice test Day - 61 Take an exciting test in SSC JE Civil Preliminary Exam in January 2018. You have only 20 mins to complete the test (25 Questions) Wish you all the best!!! Name Email 1. In rigid module, the discharge A. is independent of water levels in the distributary and water course B. depends upon the water level in distributary C. depends upon the water level in the water course D. depends upon the water levels of both, i.e. distributary and water course E. none of these.2. Garnett's diagrams are used for graphical solution of design equations of a canal by A. Lacey's theory B. Kennedy's theory C. Gibb's theory D. Lindlay theory.3. According to Lacey, depth of scour in a river depends upon the straightness of the reach. If D is the depth of scour in regime flow in a right angled bend, it is A. 1.25 D B. 1.50 D C. 1.75 D D. 2.00 D4. The ratio of the rate of change of discharge of an outlet to the rate of change in level of water surface in a distributary at its normal depth, is known as A. efficiency B. sensitivity C. flexibility D. modular limit.5. The level of the fioor of a syphon aqueduct can be obtained A. by subtracting the depth of the culvert from the canal bed level B. by subtracting the thickness of culvert plus the depth of the culvert from the canal bed level C. both (a) and (b) D. none of these.6. The water face of the guide banks, is protected by A. one men stone pitching B. two man stone pitching C. three man stone pitching D. four man stone pitching E. five man stone pitching.7. For cereal crops the most commonly adopted method of irrigation, is A. free flowing method B. check method C. furrow method D. sprinkling method.8. The ratio of the head recovered to the head put in, is known as A. efficiency B. sensitivity C. flexibility D. modular limit.9. If the straight sides of a triangular section of a lined canal with circular bottom of radius D, make an angle θ with horizontal, the hydraulic mean depth is A. D B. D/2 C. D/3 D. D/4 E. D/510. While deciding the alignment of a proposed canal taking off from a river at B, three alignments of approximately equal lengths are available. These cross a drainages at C1, C2 and C3 where drainage bed levels C1 > C2 > C3, you will provide at site C3 A. an aqueduct B. a syphon aqueduct C. a super passage D. a syphon.11. The ratio of the rate of change of discharge of an outlet and parent channel, is known as A. efficiency B. sensitivity C. flexibility D. modular limit.12. If average particle size of the silt in millimetres is m, the Lacey's silt factor f is proportional to A. m B. m^3 C. m^1/2 D. m^1/313. Effective precipitation for a crop may be defined as A. total precipitation minus the loss due to evaporation B. total precipitation minus the loss due to infiltration C. total precipitation during the crop period D. available water stored in soil within root zone of the crop.14. The most suitable section of a lined canal, is A. triangular section with circular bottom for small canals B. trapezoidal section with rounded corners for large canals C. rectangular section with rounded corners for large canals D. both (a) and (b) E. both (a) and (c)15. The field capacity of a soil depends upon A. capillary tension in soil B. porosity of soil C. both (a) and (b) D. neither (a) nor (b).16. The width of a dowla is generally kept between 30 to 60 cm and its height above the road level should invariably be more than A. 10 cm B. 20 cm C. 30 cm D. 40 cm17. Lacey's equation for calculating flood discharge in rivers, is A. V = 10.8 R^1/2 S^1/2 B. V = 10.8 R^2/3 S^1/2 C. V = 10.8 R^2/3 S^1/3 D. V = 10.8 R^1/3 S^2/318. The uplift pressure on the roof of an inverted syphon, is maximum when A. drain in running dry B. canal is running dry C. canal is running with F.S.L. D. drain is running with H.F.L.19. A current meter measures the velocity of flow, if it is held A. on the surface of water B. at the bottom of channel C. at any point within the cross-section D. none of these.20. Lane's weighted creep theory assumes A. equal weightage to horizontal and vertical creeps B. double weightage to horizontal creep and one weightage to vertical creep C. triple weightage to horizontal creep and one weightage to vertical creep D. triple weightage to vertical creep and one weightage to horizontal creep21. Cross regulators in main canals are provided A. to regulate water supply in the distributaries B. to increase water head upstream when a main canal is running with low supplies C. to overflow excessive flow water D. none of these.22. The ratio of the discharge over a trapezoidal crest to a rectangular crest of Sarda falls of identical parameters, is A. 1.084 B. 1.074 C. 1.064 D. 1.054 E. 2.05323. A counter berm is A. a horizontal benching provided on the inside slope B. a horizontal benching provided on the outside slope C. a vertical benching provided on the outer edge of the bank D. a vertical benching provided on the inner edge of the bank.24. To hold hydraulic jumps, baffle walls are provided in A. Sarda type falls B. English type falls C. Montague type falls D. Vertical type falls.25. If water table is comparatively high, the irrigation canal becomes useless, due to A. large amount of seepage B. water logging of the cultivated areas C. uncertain water demand D. spread of malaria E. all the above.26. For standing crops in undulating sandy fields, the best method of irrigation, is A. sprinkler irrigation B. free flooding C. check method D. furrow method27. An outlet is said to be proportional if its flexibility, A. zero B. less than one C. more than one D. one28. In a syphon aqueduct A. drainage passes over the canal and F.S.L. of the canal is below the bottom of the drainage trough B. drainage passes over the canal and F.S.L. of the canal is above the bottom of the drainage trough C. canal passes over the drainage and H.F.L. of the drainage is above the bottom of the canal trough D. canal passes over the drainage and H.F.L. of the drainage is below the bottom of the canal trough.29. For diversion of flood water of rivers, the type of canal constructed, is A. ridge canal B. perennial canal C. inundation canal D. canal.30. Pick up the correct sequence of the part of a canal system from the following A. Head work-distributary-branch canal-minor B. Head works-main canal-branch canal-dis-tributary-minor C. Head works-main canal-branch canal-minor-distributary D. Heads works-branch canal-main canal distributary, minor.31. In a concrete canal the approximate permissible velocity of water should not exceed A. 0.5 m/sec B. 1 m/sec C. 1.5 m/sec D. 2 m/sec32. A land is said to be water-logged if its soil pores within A. a depth of 40 cm are saturated B. a depth of 50 cm are saturated C. root zone of the crops are saturated D. all the above.