Kingdom of Saudi Arabia
Ministry of Higher Education
Majmaah University
College of Engineering
Quiz
-----------------------------------------------------------------------------------------------------------------------------Academic Year:- 1434-1435 / 2013-2014
Level:-6 Civil Engineering
Subject:-Hydraulics-2
Time:- 45 Minutes
Term:- Odd
Max. Marks:10 (2.5x4=10)
Subject Code:- CE 241
Answer any Four questions:
Question-1
The flow rate in a rectangular channel of 4.0 m wide and 2.0 m deep, is 11.56 m3/s if
the bed slope is 0.0001 . Calculate the roughness height.
Question-2
A trapezoidal channel has side slope, 2 horizontal to 3 vertical the flow is 15 m3/s at
the bed slope 1in 3000. Design the channel for the best hydraulic form. Assume Manning constant
n= 0.01
Question-3
water from a reservoir is discharged to atmosphere through a 10 cm diameter pipe
450m long. The entry from the reservoir to the pipe is sharp and the outlet is 12 m below the surface
level in the reservoir. Taking f = 0.01, calculate the velocity.
Question-4
Two reservoirs have, difference of level 8 m are connected by a single pipe of 50cm
diameter and 300 m long feeding a junction from which two parallel pipes each 400 m long and 30
cm diameter lead to the lower reservoir. If the friction factor f = 0.015 for all pipes , what will be the
total discharge.
Question-5
Find the Head loss per 1000m for a flow of 1000 lt/min. of water through a clear cast
iron conduit of rectangular cross section 10 cm by 15 cm. kinetic viscosity = 0.0048 cm2/sec.
k = 0.0255 cm