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GATE (CE) 2022 : Hydrology-Irrigation and FM Quiz #7
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Question 1
There is a venturi meter installed in a horizontal pipeline of 30 cm diameter. The pipeline is conveying a discharge of 200 litres/sec. The pressure gauge in the pipe at the section left to the throat was recorded as 8 m of water head. As an Engineer, what lower limit on the throat diameter will you set in order to avoid formation of any negative head at the throat?
Report the answer in mm.
Question 2
Two points A & B are 12m apart at same datum, the total head at A & B is 6m and 10 m respectively. If the flow rate is 20 l/s and area of cross section at A & B is 0.1m2 and 0.15m2 respectively. What is the pressure difference (N/m2) between the points? (Take g=10m/s^2 and ρ =1000kg/m^3)
Question 3
A Pitot tube is used to measure velocity of an aeroplane. U-tube differential manometer gives deflection of 8 cm of water. If specific weight of air is 12.25 N/m3 and coefficient of Pitot tube is 0.98, the speed (in/m/s) of the aeroplane is
[Neglect compressibility effects]
[Neglect compressibility effects]
Question 4
The ordinates of a 2-hour unit hydrograph for a catchment are given as
The ordinate (in m3/s) of a 4-hour unit hydrograph for this catchment at the time of 3 h would be______
The ordinate (in m3/s) of a 4-hour unit hydrograph for this catchment at the time of 3 h would be______
Question 5
In Synder’s method of synthetic unit hydrograph development, basin lag is
Question 6
A right angled triangular dam having width 14m and height 18m is made up of concrete having specific gravity 2.If no uplift force is considered, the factor of safety against overturning of dam will be
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May 30ESE & GATE CE
