Dear candidates you will find MCQ questions of Fluid Mechanics and Machinery here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
Explanation: pilot static tube is a system that uses an automatic control scheme to detect pressure. it has several holes connected to one side of the device. these outside holes are called as a pressure transducer, which
Explanation: d’alembert’s paradox states that for an incompressible and inviscid flow potential flow, the drag force is equal to zero. the fluid is moving at a constant velocity with respect to its relative fluid.
Explanation: the steady state flow must satisfy kirchhoff’s first and second law. the first law states that the total flow into the junction equals the total flow away from the junction. second law is called as the law of conservation of mass. it states that between two junctions, the head loss is independent of the path followed.
Explanation: the friction factor(f) depends on the velocity of flow, fluid density, pipe diameter and the viscosity of the pipe.
Explanation: moody chart is a graph of frictional factor(f) vs reynolds numbers. it gives various values corresponding to the
Explanation: darcy-weisbach equation relates the head loss and pressure loss due to friction along a given pipe with a specified length. it contains a dimensionless friction factor called the darcy friction factor. the equation was named after henry darcy and julius weisbach.
Explanation: circular pipes have a diameter treated in a round manner. for a fluid flow which is laminar head loss is directly proportional to the fluid velocity. thus, friction factor is inversely proportional to its velocity. therefore, the correct option is ‘64/re’.
Explanation: hydraulic radius is one of the properties of a fluid flow in a channel. it controls the water discharge. it also determines the amount of work the channel
Explanation: hydraulic diameter handles the flow in non-circular channels and tubes. the most suitable term to calculate the hydraulic diameter for a round tube is dh= 4a/p. where ‘a’ is the cross-sectional area and ‘p’ is the wetted perimeter.
Explanation: minor losses play an important role in calculating the flow, pressure and energy of the piping system. fluid that moves through the pipe carries momentum and energy due to the forces acting on them.
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