Test: Fluid Mechanics Level - 4 - Mechanical Engineering MCQ

The time of oscillation of a floating body is given by Where
K = Radius of Gyration of the floating body about its centre of gravity
h = Metacentric height of the floating body

A cylindrical body of cross-sectional area A height H and densityrs is immersed to a depth h in a liquid of density r and tied down to bottom with a string then the tension in the string is

There is no geometrical distinction between the streamline, pathline and streak line in case of

Stream line, path line and streak line are identical when the

Match List I with List II and select the correct answer using the codes given below the lists:

The continuity equation in differential form is

Under which of the following conditions will the equation   constant, will be valid in the whole flow field ?

1. Flow is rotational
2. Flow is irrotational
3. Flow is incompressible
4. Flow is steady
5. Flow is laminar

Venturimeter consists of following parts :
1. Diverging part
2. Throat
3. Main inlet pipe
4. Short converging part
Select the correct sequence of parts

The range for coefficient of discharge (C_d) for a venturimeter is

In the siphon in figure below assuming ideal flow, the pressure P_B

The flow of fluid through a pipe is laminar when

An oil of kinematic viscosity 0.5 stokes flows through a pipe of 4 cm diameter. The flow is critical at a velocity of about

In the Navier-Stokes equations, the forces considered are

Navier-Stokes equation represents the conservation of

For laminar flow between two fixed parallel plates, the flow velocity

Capillary tube viscometers used for measurement of viscosity are based on

An incompressible fluid (kinematic viscosity, 7.4 × 10^–7 m²/s, specific gravity, 8.88) is held between two parallel plates. If the top plate is moved with a velocity of 0.5 m/s while the bottom one is held stationary, the fluid attains a linear velocity profile in the gap of 0.5 mm between these plates; the shear stress in Pascals on the surface of top plate is

Pressure drop in a 100 mm diameter horizontal pipe is 50 kPa over a length of 10 m. The shear stress at the pipe wall is

The pressure drop for a relatively low Reynolds number flow in a 600 mm, 30 m long pipe line is 70 kPa. What is the wall shear stress

When the hydrodynamic boundary layer thickness (δ), which is the distance from the surface at which the local velocity (u) reaches 99% of the free-stream velocity, then

Shear velocity is

The head loss in a sudden expansion from 5 cm diameter to 10 cm diameter pipe, in terms of velocity V₁ in the 5 cm pipe