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Question

Match List-I (Flow type) with List-II (Flow characteristics) and select the correct answer using the codes given below the lists:
List-I
A. Transient flow
B. Turbulent flow
C. Steady-state flow
D. Laminar flow
List-II
1. Seepage flow is a function of time
2. Hydraulic gradient varies with square of velocity
3. Flow at low velocity
4. Governing equation in 2-D is

kx2hx2+ky2hy2=0

Codes:
A B C D

A
1 2 4 3
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B
3 2 1 4
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C
1 2 3 4
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D
2 1 4 3
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Solution

The correct option is A 1 2 4 3
Transient flow. is flow where the flow velocity and pressure are changing with time. When changes occur to a fluid systems such as the starting or stopping of a pump, closing or opening a valve, or changes in tank levels, then transient flow conditions exist: otherwise the system is steady state.

Turbulent flow. type of fluid flow in which the fluid undergoes irregular fluctuations, or mixing, in contrast to laminar flow, in which the fluid moves in smooth paths or layers. In turbulent flow the speed of the fluid at a point is continuously undergoing changes in both magnitude and direction.

Steady-state flow refers to the condition where the fluid properties at any single point in the system do not change over time. These fluid properties include temperature, pressure, and velocity.

Laminar flow ( or streamline flow) occurs when a fluid flows in parallel layers, with no disruption between the layers. At low velocities, the fluid tends to flow without lateral mixing, and adjacent layers slide past one another.

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