Q1.The flow of water (mass density = 100 kg/m3 and kinematic viscosity = 10-6 m2/s) in a commercial pipe, having equivalent roughness ks as 0.12 mm, yields an
average shear stress at the pipe boundary = 600 N/m2. The value of ks/δ' (δ' being the thickness of laminar sub-layer) for this pipe is
Answer : Option DExplaination / Solution: No Explaination.
Q5.A volume of 3.0×106 m3 of groundwater was pumped form an unconfined aquifer
uniformly from an area of 5 km2. The pumping lowered the water table form
initial level of 102 m to 99 m. The specific yield of the aquifer is
Answer : Option AExplaination / Solution: No Explaination.
Q6.A stable channel is to be designed for a discharged of Q m3 /s with silt factor f as
per Lacey’s method. The mean flow velocity (m/s) in the channel is obtained by
Answer : Option AExplaination / Solution: No Explaination.
Q7.The base width of an elementary profile of a gravity dam of height H is b. The
specific gravity of the material of the dam is G and uplift pressure coefficient is
K. The correct relationship for no tension at the heel is given by
Answer : Option AExplaination / Solution: No Explaination.
Q8.Water emerges from an ogee spilway with velocity = 13.72 m/s and depth = 0.3
m at it toe. The tail water depth required to form a hydraulic jump at the toe is
Answer : Option CExplaination / Solution: No Explaination.
Q9.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 unifromly in 20
days neglecting other field losses is
Answer : Option BExplaination / Solution: No Explaination.
Q10.A single pipe of length m1500 and diameter 60 cm connects two reservoirs having
a difference of m20 in their water levels. The pipe is to be replaced by two pipes
of the same length and equal diameter d to convey %25 more discharge under the
same head loss. If the friction factor is assumed to be the same for all the pipes,
the value of d is approximately equal to which of the following options?
Answer : Option DExplaination / Solution: No Explaination.
Total Question/Mark :
Scored Mark :
Mark for Correct Answer : 1
Mark for Wrong Answer : -0.5
Mark for Left Answer : 0