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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
The difference of pressure between the inside and outside of a liquid drop is

(a)p = Txr
(d)p = 2T/r
p = T/2r
(b)p = T/r

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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 ?

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

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Hydraulics & Fluid Mechanics
Which of the following is demensionless

specific gravity
specific speed
specific weight
specific volume

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Hydraulics & Fluid Mechanics
Drag force is a function of i) projected area of the body ii) mass density of the fluid iii) velocity of the body The correct answer is

(i) and (iii)
(i) and (ii)
(ii) and (iii)
(i), (ii) and (iii)

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Hydraulics & Fluid Mechanics
When a body floating in a liquid, is displaced slightly, it oscillates about

center of buoyancy
e.g. of body
metacentre
center of pressure

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Hydraulics & Fluid Mechanics
Two pipe systems are said to be equivalent when

length of pipe and discharge are same in two systems
friction factor and length are same in two systems
length and diameter are same in two systems
head loss and discharge are same in two systems

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