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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
An object having 10 kg mass weighs 9.81kg on a spring balance. The value of ‘g’ at this place is

9.81 m/sec²
9.75 m/sec²
10.2/m sec
10m/sec²

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Hydraulics & Fluid Mechanics
A large Roynold number is indication of

turbulent flow
LAMINAR FLOW
highly turbulent flow.
smooth and streamline flow

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Hydraulics & Fluid Mechanics
The position of center of pressure on a plane surface immersed vertically in a static mass of fluid is

always below the centroid of the area
always above the centroid of the area
at the centroid of the submerged area
None of these

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Hydraulics & Fluid Mechanics
Least possible value of correction factor for i) kinetic energy is zero ii) kinetic energy is 1 iii) momentum is zero iv) momentum is 1 The correct statements are

(ii) and (iv)
(i) and (iii)
(i) and (iv)
(ii) and (iii)

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

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Hydraulics & Fluid Mechanics
The units of viscosity are

newton-sec/metre
kg sec/metre
metre2/se
newton-sec/metre2

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