Test: Viscous Flow of Incompressible Fluids, Flow Losses Level - 1 - Mechanical Engineering MCQ

The purpose of surge tank in a pipe line is to

Head loss in turbulent flow in a pipe

Oil at 20°C (ρ = 888 kg⁄m³ and μ = 0.800 kg/m ∙ s) is flowing steadily through a 5 cm diameter, 40 m long pipe. The pressure at the pipe inlet and outlet are measured to be 745 and 97 kPa, respectively. Determine the flow rate of oil (in L/s) through the pipe assuming the pipe is horizontal.

Water at 25°C is flowing through a 1.0 km long GI pipe of 200 mm diameter at the rate of 0.07 m3⁄s. If value of Darcy friction factor for this pipe is 0.02 and density of water is 1000 kg/m³, the pumping power (in kW) required to maintain the flow is

Pipes of lengths l₁ , l₂ etc. and diameters d₁ , d₂ , etc., are connected in series. A single pipe of length l₁ + l₂ + l₃ +……having same pressure loss as all pipes in series will have diameter equal to

The velocity distribution for a fully-developed laminar flow in a pipe is given by

Determine the radial distance from the pipe axis at which the velocity equals the average velocity.

Heavy fuel oil flows from A to B through a 100 m horizontal steel pipe of 150 mm diameter. The pressure at A is 1.08 MPa and at B is 0.95 MPa. The kinematic viscosity is 412.5 × 10−6 m2⁄s, and the relative density of the oil is 0.918. What is the flow rate in m3⁄s?

In the case of fully developed flow through tubes

The Reynolds number for flow of oil through a 5 cm diameter pipe is 1700. The kinematic viscosity, v = 1.02 × 10−6 m2⁄s. What is the velocity at a point 0.625 cm away from the wall?

Three identical pipes of length l, diameter d and friction factor f are connected in parallel between two reservoirs. What is the size of a pipe of length l and of the same friction factor f equivalent to the above pipe?

The extent of pressure produced due to water hammer depends on

The head loss in a sudden expansion from 8 cm diameter pipe to 16 cm diameter pipe in terms of velocity V₁ in the smaller pipes is

Flow takes place at Reynolds number of 1500 in two different pipes with relative roughness of 0.001 and 0.002. The friction factor

For laminar flow through a round pipe, the shear stress

Laminar flow between closely spaced parallel, stationary plates is governed by the consideration of which one of the following pair of forces?

Which one of the following statements is not correct in the context of laminar flow through a pipeline?

The center-line velocity in a flow between parallel plates is 3 m⁄s. What is the average flow velocity between the plates if the Reynolds number of the flow is 800?