Two flow patterns are represented by their stream functions ?1 and ?2 as given b

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Question
Two flow patterns are represented by their stream functions ?₁ and ?₂ as given below:
?₁ = x² + y², ?₂ = 2xy
If these two patterns are superimposed on one another, the resulting streamline pattern can be represented by one of the following :
Options
A. A family of parallel straight lines
B. A family of circles
C. A family of parabolas
D. A family of hyperbolas

Correct Answer

A family of circles

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1. An inverted siphon is a
Options
A. device for distributing septic tank effluent to a soil absorption system
B. device for preventing overflow from elevated water storage tank
C. device for preventing crown corrosion of sewer
D. section of sewer which is dropped below the hydraulic grade line in order to avoid an obstacle.

3. If YY is the centroidal axis of a T beam-section subjected to plastic moment, Mp, the neutral axis lies,
Options
A. above the line ZZ
B. between the lines YY and ZZ
C. between the lines XX and YY
D. below the line XX

4. Water emerges from an ogee spillway with velocity 13.72 m/s and depth = 3.0 m at its toe. The tail water depth required to form a hydraulic jump at the toe is
Options
A. 6.48 m
B. 5.24 m
C. 3.24 m
D. 2.24 m

6. The two criteria for the determination of allowable bearing capacity of a foundation are
Options
A. tensile failure and compression failure.
B. tensile failure and settlement.
C. bond failure and shear failure.
D. shear failure and settlement.

7. If ? = nominal diameter of reinforcing bar, f_s = compressive stress in the bar and f_bd= design bond stress of concrete, the anchorage length, La of straight bar in compression is equal to :
Options
A.
B.
C.
D.

10. An outlet irrigates an area of 20 ha. The discharge (l/s) required at this outlet to meet the evapotranspiration requirement of 20 mm occurring uniformly in 20 days neglecting other field losses is
Options
A. 2.52
B. 2.31
C. 2.01
D. 1.52

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