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This mock test of Test: Fluid Mechanics (Level -II)- 2 for Mechanical Engineering helps you for every Mechanical Engineering entrance exam.
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QUESTION: 1

When a block of ice floating on water in a container melts, the level of water in the container

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QUESTION: 2

The body whose surface does not coincide with the streamline when places in a flow is called as

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QUESTION: 3

A large metacentric height in a vessel

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QUESTION: 4

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

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QUESTION: 5

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

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QUESTION: 6

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

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QUESTION: 7

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

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QUESTION: 8

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

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QUESTION: 9

The continuity equation in differential form is

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QUESTION: 10

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

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QUESTION: 11

Venturimeter consists of following parts :

1. Diverging part

2. Throat

3. Main inlet pipe

4. Short converging part

Select the correct sequence of parts

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QUESTION: 12

The range for coefficient of discharge (C_{d}) for a venturimeter is

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QUESTION: 13

In the siphon in figure below assuming ideal flow, the pressure P_{B}

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QUESTION: 14

The flow of fluid through a pipe is laminar when

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QUESTION: 15

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

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QUESTION: 16

In the Navier-Stokes equations, the forces considered are

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QUESTION: 17

Navier-Stokes equation represents the conservation of

Solution:

The **Navier**-**Stokes equations** govern the motion of fluids and can be seen as Newton's second law of motion for fluids. ... The **Navier**-**Stokes equations represent the conservation** of momentum, while the continuity **equation represents the conservation** of mass.

QUESTION: 18

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

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QUESTION: 19

Capillary tube viscometers used for measurement of viscosity are based on

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QUESTION: 20

An incompressible fluid (kinematic viscosity, 7.4 × 10^{–7} m^{2}/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

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QUESTION: 21

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

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QUESTION: 22

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

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QUESTION: 23

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

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QUESTION: 24

Shear velocity is

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QUESTION: 25

The head loss in a sudden expansion from 5 cm diameter to 10 cm diameter pipe, in terms of velocity V_{1} in the 5 cm pipe

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