Hydraulics and Fluid Mechanics in ME
When a body is placed over a liquid, it will sink down if

None of these
Gravitational force is more than the up-thrust of the liquid
Gravitational force is equal to the up-thrust of the liquid
Gravitational force is less than the up-thrust of the liquid

ANSWER DOWNLOAD EXAMIANS APP

Hydraulics and Fluid Mechanics in ME
A compound pipe is required to be replaced by a new pipe. The two pipes are said to be equivalent, if

Loss of head and discharge of both the pipes is same
Length of both the pipes is same
Loss of head and velocity of flow in both the pipes is same
Diameter of both the pipes is same

ANSWER DOWNLOAD EXAMIANS APP

Hydraulics and Fluid Mechanics in ME
A compound pipe of diameter d1, d2 and d3 having lengths l1, l2 and l3 is to be replaced by an equivalent pipe of uniform diameter d and of the same length (l) as that of the compound pipe. The size of the equivalent pipe is given by

l/d² = (l₁/d₁²) + (l₂/d₂²) + (l₃/d₃²)
l/d⁴ = (l₁/d₁⁴) + (l₂/d₂⁴) + (l₃/d₃⁴)
l/d⁵ = (l₁/d₁⁵) + (l₂/d₂⁵) + (l₃/d₃⁵)
l/d³ = (l₁/d₁³) + (l₂/d₂³) + (l₃/d₃³)

ANSWER DOWNLOAD EXAMIANS APP