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Fluid Mechanics

Fluid Mechanics
The equivalent diameter for flow through a rectangular duct of width B and height H is

HB/2(H + B)
2HB/(H + B)
4HB/(H + B)
HB/(H + B)

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Fluid Mechanics
Reynolds number for flow of water at room temperature through 2 cm dia pipe at an average velocity of 5 cm/sec is around

100
2000
1000
10

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Fluid Mechanics
The hydraulic radius for flow in a rectangular duct of cross-sectional dimension H, W is

√(HW/π)
2HW/(H + W)²
HW/4(H + W)²
HW/2(H + W)²

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Fluid Mechanics
Unit of mass velocity is

Kg/m². hr
Kg/m²
Kg/hr
Kg/m³. hr

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Fluid Mechanics
Rotary vacuum pumps can reduce the absolute pressure to as low as __________ mm Hg.

0.001
1
0.01
0.1

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Fluid Mechanics
Slurries can be most conveniently pumped by a __________ pump.

Screw
Centrifugal
Gear
Reciprocating

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MORE MCQ ON Fluid Mechanics

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