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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
A ship whose hull length is 100 m is to travel at 10 m/sec. For dynamic similarity, at what velocity should a 1:25 model be towed through water ?

2 m/sec
10 m/sec
25 m/sec
50 m/sec

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Hydraulics & Fluid Mechanics
Specific weight of sea water is more that of pure water because it contains

dissolved air
dissolved salt
suspended matter
All of these

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Hydraulics & Fluid Mechanics
A model of torpedo is tested in a towing tank at a velocity of 25 m/sec. The prototype is expected to attain a velocity of 5 m/sec. What model scale has been used ?

1 :25
1:50
1 : 2.5
1 : 5

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Hydraulics & Fluid Mechanics
A fluid is said to be ideal, if it is

inviscous and incompressible
inviscous
incompressible
inviscous and compressible

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Hydraulics & Fluid Mechanics
The discharge of a liquid of kinematic viscosity 4 cm²/sec through a 8 cm dia-meter pipe is 3200n cm7sec. The type of flow expected is

TRANSITION FLOW
LAMINAR FLOW
TURBULENT FLOW
NOT PREDICTABLE FROM THE GIVEN DATA

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Hydraulics & Fluid Mechanics
The continuity equation pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid (where pi and p2 are mass densities.)

frictionless flow
uniform flow
steady flow
incompressible flow

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