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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
A Pelton wheel develops 1750 kW under a head of 100 meters while running at 200 r.p.m. and discharging 2500 liters of water per second. The unit discharge of wheel is

2.5 m3/s
1.5 m3/s
0.25 m3/s
0.5 m3/s

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Hydraulics and Fluid Mechanics in ME
If the ratio's of the corresponding forces acting at corresponding points are equal, then the model and the prototype are said to have.

Geometric similarity
Dynamic similarity
Kinematic similarity
None of these

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Hydraulics and Fluid Mechanics in ME
The upper surface of a weir over which water flows is known is

weir top
nappe
sill
crest

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Hydraulics and Fluid Mechanics in ME
An open tank contains 1 m deep water with 50 cm depth of oil of specific gravity 0.8 above it. The intensity of pressure at the bottom of tank will be

14 kN/m2
12 kN/m2
10 kN/m2
4 kN/m2

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Hydraulics and Fluid Mechanics in ME
The torque required to overcome viscous resistance of a collar bearing is (where R1 and R2 = External and internal radius of collar)

(μπ²N/60t) × (R₁⁴ - R₂⁴)
μπ²N/60t) × (R₁³ - R₂³)
(μπ²N/60t) × (R₁ - R₂)
(μπ²N/60t) × (R₁² - R₂²)

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Hydraulics and Fluid Mechanics in ME
The unit of dynamic viscosity in S.I. units is

Poise
Stoke
N-s/m²
N-m/s²

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