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Fluid Mechanics & Hydraulics MCQs with Answers & Solutions — Page 7 | Civexa

Subjects / Fluid Mechanics & Hydraulics / MCQs

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Fluid Mechanics & Hydraulics MCQs with answers

343 free questions — page 7 of 7. Open one to see the correct answer and the full solution.

2 litres of an oil weigh 16 N. Calculate the specific gravity of the oil. Consider the density of water to be 998 kg/m³.Fluid Properties
If a liquid enters a pipe of diameter 'd' with velocity 'v', then what will be its velocity at the exit if the diameter of the pipe reduces to 0.5d?Fluid Kinematics
If a person studies about a fluid which is at rest, the study is called:Fluid Statics
The vertical distance between the centre line of a pump and the point of delivery is known asHydraulic Machines
A centrifugal pump with the impeller diameter of 125 mm delivers a power of 10 hp. If the impeller diameter is changed to 250 mm, what will be the…Hydraulic Machines
The total head that must be produced by the pump to satisfy the specific external requirements is called theHydraulic Machines
To avoid gas bounding, the pump is:Hydraulic Machines
High water hammer pressure can cause breakage and damage to a pipeline. The property of a fluid which is accountable for the problem of water hammer…Flow Through Pipes
Venturi meter is an application of Bernoulli's equation. Its basic principle also depends on the Bernoulli equation, which isFlow Measurement
A compound pipeline consists of two pieces of identical pipes. The equivalent length of the same diameter and the same friction factor for this…Flow Through Pipes
In a hydraulic jump occurring in a horizontal rectangular channel, the sequent depths are 0.25 m and 1.25 m. The energy loss in this jump is:Hydraulic Jump
If a device consists of one inlet and one outlet and the volume flow rates at the inlet and at the outlet are equal, then the flow through the device:Fluid Kinematics
According to the Newton's law of viscosity, the shear stress of a fluid element layer is directly proportional to the:Fluid Properties
A tank has height and width as 4 m and 3 m, respectively. Determine the total water force, in kN, acting on the bottom of the tank when it is…Hydrostatic Forces on Surfaces
If Reynolds number is less than 500, the flow is said to be laminar for the:Open Channel Flow
Which of the following is NOT the remedial measure to prevent water hammer through pipes?Flow Through Pipes
A 15 cm diameter orifice discharging from a tank issues out a jet of diameter 12.75 cm diameter at a vena contracta. The coefficient of contraction…Orifices and Mouthpieces
In a circular tube of diameter 100 mm and length 15 m with laminar flow, the Darcy friction factor is estimated to be 0.05. Calculate the Reynolds…Laminar Flow
The shear stress at a point in a liquid is found to be 0.02 N/m². The velocity gradient at this point is 0.20 s⁻¹. What will be the viscosity of the…Fluid Properties
If the velocity of the fluid does NOT change with respect to time, the flow is said to be a/an:Fluid Kinematics
What will be the discharge of a single-acting pump if it has one cylinder of area 0.5 m² and stroke of length 20 cm and if the pump has 180 rpm of…Hydraulic Machines
Why are air vessels fitted in reciprocating pumps?Hydraulic Machines
The right limb of height h₂ in the simple U-tube manometer containing mercury is open to atmosphere, while the left limb of height h₁ is connected to…Fluid Statics
What is the best side slope (n) for the most economic trapezoidal channel having depth d and base width b?Open Channel Flow
A Moody diagram represents _____ as a function of Reynolds number, in a pipe flow.Flow Through Pipes
When pipes of different diameters are connected in series from end to end to form a pipe line, the total head loss developed is equal to:Flow Through Pipes
Bernoulli's equation is applicable for:Fluid Dynamics
The tangent drawn to the instantaneous velocity in a flow field is called:Fluid Kinematics
Which of the following property of water makes the raindrops to form roughly spherical structure?Fluid Properties
For a given open channel, if the Chezy's coefficient (C) is decreased, then how will it affect the discharge (Q) of the flow?Open Channel Flow
A Cipolletti weir has length of 2.0 m and head over the weir is 1 m. What is the discharge over the weir? (Take c_d = 0.62)Weirs and Notches
Which one of the following is an advantage using a triangular notch over a rectangular notch?Weirs and Notches
Which one of the following statements is correct for flow in open channels?Open Channel Flow
Water flows through a pipe of 200 mm in diameter 60 m long with a velocity of 2.5 m/s. What is the head loss due to friction using Darcy's formulae?…Flow Through Pipes
The pressure distribution in a liquid subjected to a constant horizontal acceleration isFluid Statics
A convergent mouthpiece is discharging water under a constant head of 5 metres. If the diameter of the mouthpiece is 75 mm, then what is the…Orifices and Mouthpieces
A flat plate 1.5 m × 1.5 m moves at 45 km/hour in stationary air of specific weight 11.3 N/m³. If the coefficient of lift is 0.75, then what is the…Flow Past Immersed Bodies
A submarine which may be supposed to approximate a cylinder 3 m in diameter and 15 m long travels submerged at 1.54 m/s in sea water at 4°C. What is…Flow Past Immersed Bodies
If the pressure heads at the different sections of the pipe are plotted to scale as vertical ordinates above the axis of the pipe and all these…Flow Through Pipes
The difference in the water surface level of two reservoirs which are connected by a siphon is 8 m. The length of siphon is 600 m and its diameter…Flow Through Pipes
The air vessel is not required for multi-cylinder pump because it hasHydraulic Machines
Which one of the following is the correct assumption for the derivation of Bernoulli's equation?Fluid Dynamics
Statement (I): The negative derivative of velocity potential function with respect to any direction gives the fluid velocity in that direction.…Fluid Kinematics

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