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Hydraulics & Fluid Mechanics

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

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

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Hydraulics & Fluid Mechanics
The density of water is 1000 kg/m3 at

0°C
0°K
20°C
4°C

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Hydraulics & Fluid Mechanics
Which of the following instrument can be used for measuring speed of an aeroplane

Venturimeter
rotameter
Orifice plate
pitot tube

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Hydraulics & Fluid Mechanics
A bucket of water is hanging from a spring balance. An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will

decrease
remain same
increase
increase/decrease depending on depth of immersion

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Hydraulics & Fluid Mechanics
The horse power transmitted through a pipe is maximum when the ratio of loss of head due to friction and total head supplied is

1/2
1/4
1/3
2/3

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Hydraulics & Fluid Mechanics
For a floating body to be in equilibrium

a righting couple should be formed
center of buoyancy and e.g. must lie on same vertical plane
All of these
meta center should be above e.g.

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