Practice Test: Question Set - 06
1. The difference in level between the top of a bank and supply level in a canal, is called
- (A) Berm
- (B) Free board
- (C) Height of bank
- (D) None of these
2. If L is total length of a canal in kilometers, P is total perimeter of its lining in metres and C is the cost of lining per square metre, the additional expenditure involved on lining, is
- (A) 100 PLC
- (B) PLC/1000
- (C) PL/1000C
- (D) PC/100L
3. The crest level of a canal diversion head work, depends upon
- (A) F.S.L. of the canal
- (B) Discharge perimeters
- (C) Pond level
- (D) All the above
4. The most suitable location of a canal head work, is
- (A) Boulders stage of the river
- (B) Delta stage of the river
- (C) Rock stage of the river
- (D) Trough stage of the river
5. The length and width of a meander and also the width of the river, vary roughly as
- (A) Square root of the discharge
- (B) Discharge
- (C) Square of the discharge
- (D) Cube of the discharge
6. 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
7. V and R are the regime mean velocity and hydraulic mean depth respectively in meters. Lacey's silt factor f is
- (A) 2V²/√3 R
- (B) 3V²/4R
- (C) 5V²/2R
- (D) 2V²/5R
8. 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
9. 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
10. Canals constructed for draining off water from water logged areas, are known
- (A) Drains
- (B) Inundation canals
- (C) Valley canals
- (D) Contour canals
11. The Lacey's regime velocity is proportional to
- (A) R1/2 S3/4
- (B) Q3/4 S1/3
- (C) R3/4 S1/3
- (D) R2/3 S1/2
12. A fall in a canal bed is generally provided, if
- (A) Ground slope exceeds the designed bed slope
- (B) Designed bed slope exceeds the ground slope
- (C) Ground slope is practically the same as the designed bed slope
- (D) None of these
13. If the straight sides of a triangular section of a lined canal with circular bottom of radius R, make an angle θ with horizontal, the perimeter of the canal is
- (A) R (θ + tan θ)
- (B) 2R (θ + tan θ)
- (C) R (θ + cos θ)
- (D) 2R (θ + cos θ)
14. According to G.W. Pickles the effect of confining the flood water of a river between levee, is to increase
- (A) Rate of flood wave
- (B) Water surface elevation during floods
- (C) Maximum discharge
- (D) Surface slope of streams above the levied portion
15. F.S.L. of a canal at its head with respect to parent channel is kept
- (A) At the same level
- (B) 15 cm lower
- (C) 15 cm higher
- (D) None of these