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WorksheetsFLUID MECHANICS AND TURBO MACHINERY
Total questions: 15
Worksheet time: 10mins
The flow characteristics of a channel does not change with time at any point. What type of flow is it?
Steady flow
Uniform flow
Laminar flow
Turbulent flow
The Reynolds number for a flow in a channel is 1000. What type of flow is it?
Laminar
Turbulent
Transition
Steady
The ratio of inertia force and gravitational force is called as ______
Reynolds Number
Stokes Number
Froude Number
Eulers Number
The Froude’s number for a flow in a channel section is 1. What type of flow is it?
Sub Critical
Critical
Super critical
Tranquil
What is the Froude’s number for a channel having mean velocity 4.34 m/s and mean hydraulic depth of 3m?
a) 0.4m
b) 0.6m
c) 0.7m
d) 0.8m
Calculate the mean hydraulic radius for a channel having 20m2 cross sectional area and 50m of wetted perimeter.
a) 0.4m
b) 0.5m
c) 0.6m
d) 0.7m
Calculate the mean hydraulic depth of a channel having top width of 7m and cross sectional area of 35m2
a) 4m
b) 5m
c) 6m
d) 7m
Calculate the Froude’s number for a channel having discharge of 261.03 m3/s, cross sectional area of 42 m2 and the top width being 6m.
a) 0.65
b) 0.72
c) 0.38
d) 0.75
The discharge and velocity of water in a rectangular channel are 75m3/s and 5m/ s respectively. The hydraulic depth being 3m calculate the hydraulic radius.
a) 1.36m
b) 1.87m
c) 1.98m
d) 2.0m
Calculate the hydraulic diameter for a rectangular duct having 10m width and 6m depth.
a) 5.5m
b) 6.5m
c) 7.5m
d) 8.5m
The ratio of Hydraulic radius and Hydraulic depth is ½ and the top width of the channel is 6m, calculate the hydraulic depth of the channel.
a) 1m
b) 2m
c) 3m
d) 4m
Which geometric parameter determines the efficiency of the channel?
a) Hydraulic depth
b) Hydraulic radius
c) Section factor
d) Normal depth
Calculate the wetted perimeter for a rectangular channel having top width of 4.5m and depth of 3m.
a) 12m
b) 10.5m
c) 7.5m
d) 15m
Let the top width of a rectangular channel be B and the depth be y, determine the hydraulic radius of the channel.
a) By/ B+2y
b) By/ B+ y
c) y
d) B
What is the wetted area for a triangular channel having depth y and the side slope being Z?
a) Zy2
The Area of the Triangle = (½) (base) (height)
Base = Zy+Zy = 2Zy
Area = (1/2) (2Zy) (y)
Area = Zy2.
b) 2Zy
c) Zy
d) Z2 y
