GATE 2025 FLUID MECHANICS 20

Consider the following conditions:

1) Fluid is real

2) Flow is ideal

3) Flow is viscous

4) Flow is steady

5) Flow is along streamline.

The conditions to be satisfied for Bernoulli’s equation are.

An orifice is located at side of tank with water level is 1.5 m above the centre of orifice. Water jet travel 0.8m distance (horizontal) and 0.2 m vertical fall. The coefficient of resistance of orifice would be:

Water is flowing in a rigid pipe, the pressure wave travel will velocity (c) 950m/s. The value of compressibility of fluid is 6×10^–10 . The value of water hammer pressure will be:

Assume velocity of water V = 4m/s.

The small orifices A and B of diameter 1 cm and 2cm respectively are placed on the side of the tank at depth H₁ and H₂ below the open liquid surface. If discharge through A and B are equal. And for some value of Cd for two orifices, the ratio of H₁ and H₂ are x:1 find the value of ‘x’.

A rectangular, sharp crested weir with end contractions is 1.85m long. How high should it be placed in a channel to maintain an upstream depth of 2.35m for 0.45 m³/s flow?

(C_d= 0.67, g = 10m/s)

Air is flowing in pipe as shown in figure. If u = 10 m/s, the manometer reading is (use g = 10 m/s², ρ_Air = 1.2 kg/m³)