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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
For pipes, laminar flow occurs when Roynolds number is

less than 2000
less than 4000
more than 4000
between 2000 and 4000

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Hydraulics and Fluid Mechanics in ME
The angle of taper on draft tube is

Greater than 5°
Less than 8°
Greater than 8°
Greater than 15°

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Hydraulics and Fluid Mechanics in ME
The discharge of a double acting reciprocating pump is (where L = Length of stroke, A = Cross-sectional area of piston, and N = Speed of crank in r.p.m.)

(L.A.N)/60
L.A.N
(2 L.A.N)/60
2 L.A.N

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Hydraulics and Fluid Mechanics in ME
A rectangular block 2 m long, 1 m wide and 1 m deep floats in water, the depth of immersion being 0.5 m. If water weighs 10 kN/m3, then the weight of the block is

lOkN
15 kN
20 kN
5kN

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Hydraulics and Fluid Mechanics in ME
A vessel of 4 m3 contains oil which weighs 30 kN. The specific weight of the oil is

7.5 kN/m3
4.5 kN/m3
10 kN/m3
6 kN/m3

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Hydraulics and Fluid Mechanics in ME
Differential monometer is used to measure

pressure in pipes, channels etc
difference of pressure between two points
very low pressure
atmospheric pressure

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