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Hydraulics & Fluid Mechanics

Hydraulics & Fluid Mechanics
Which of the following is demensionless

specific weight
specific volume
specific gravity
specific speed

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Hydraulics & Fluid Mechanics
The units of viscosity are

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

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

inviscous
inviscous and compressible
inviscous and incompressible
incompressible

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

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

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Hydraulics & Fluid Mechanics
In which of the following the friction drag is generally larger than pressure drag?

a cylinder
a sphere
an airfoil
a circular disc or plate held normal to flow

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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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