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Hydraulics & Fluid Mechanics

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 : 5
1:50
1 :25
1 : 2.5

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Hydraulics & Fluid Mechanics
Operation of McLeod gauge used for low pressure measurement is based on the principle of

gas law
Boyle’s law
Pascal’s law
Charle’s law

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Hydraulics & Fluid Mechanics
SURFACE TENSION HAS THE UNITS OF

NETON/M
NEWTONS/M
NEW TONS/M
NEWTONS

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Hydraulics & Fluid Mechanics
Which of the following is demensionless

specific gravity
specific speed
specific volume
specific weight

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

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Hydraulics & Fluid Mechanics
THE THEORETICAL VALUE OF COEFFICIENT OF CONTRACTION OF A SHARP EDGED ORIFICE IS

0.611
0.86
0.95
1.01

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