Test: Fluid Mechanics Level - 2

Question 1

Which of the following is the unit of kinematic viscosity ?

Accepted Answer

stoke

Answer

pascal

Answer

poise

Answer

faraday

Answer

none of the above

Question 2

A one dimensional flow is one which

Accepted Answer

involves zero transverse component of flow

Answer

is uniform flow

Answer

is steady uniform flow

Answer

takes place in straight lines

Answer

takes place in one dimension

Question 3

Alcohol is used in manometers because

Accepted Answer

it can provide longer column due to low density

Answer

it has low vapour pressure

Answer

it is clearly visible

Answer

it has low surface tension

Answer

is provides suitable meniscus

Question 4

Free surface of a liquid tends to contract to the smallest possible area due to force of

Accepted Answer

surface tension

Answer

viscosity

Answer

friction

Answer

cohesion

Answer

adhesion

Question 5

Falling drops of water become spheres due to the property of

Accepted Answer

surface tension

Answer

adhesion

Answer

cohesion

Answer

viscosity

Answer

compressibility

Question 6

If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be

Accepted Answer

lower than the surface of liquid

Answer

higher than the surface of liquid

Answer

the same as the surface of liquid

Answer

unpredictable

Answer

none of the above

Question 7

The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as

Accepted Answer

centre of pressure

Answer

meta centre

Answer

centre of buoyancy

Answer

centre of gravity

Answer

none of the above

Question 8

The resultant upward pressure of the fluid on an immersed body is called

Accepted Answer

buoyancy

Answer

upthrust

Answer

centre of pressure

Answer

all the above are correct

Answer

none of above is correct

Question 9

The conditions for the stable equilibrium of a floating body are

Accepted Answer

All of the above

Answer

the meta-centre should lie above the centre of gravity

Answer

the centre of buoyancy and the centre of gravity must lie on the same vertical line

Answer

a righting couple should be formed

Question 10

Poise is the unit of

Accepted Answer

viscosity

Answer

surface tension

Answer

capillarity

Answer

shear stress in fluids

Answer

buoyancy

Question 11

The buoyancy depends on

Accepted Answer

mass of liquid displaced

Answer

viscosity of the liquid

Answer

pressure of the liquid displaced

Answer

depth of immersion

Answer

none of the above

Question 12

The centre of gravity of the volume of the liquid displaced by an immersed body is called

Accepted Answer

centre of buoyancy

Answer

meta-centre

Answer

centre of pressure

Answer

centre of gravity

Answer

none of the above

Question 13

A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury

Accepted Answer

whole of the metal piece will be immersed with its top surface just at mercury level

Answer

the metal piece will simply float over the mercury

Answer

the metal piece will be immersed in mercury by half

Answer

metal piece will sink to the bottom

Answer

none of the above

Question 14

The capillary rise at 20ºC in a clean glass tube of 1 mm bore containing water is approximately

Accepted Answer

30 mm

Answer

1 mm

Answer

5 mm

Answer

10 mm

Answer

20 mm

Question 15

If the surface of liquid is convex, then

Accepted Answer

cohesion pressure is increased

Answer

cohesion pressure is negligible

Answer

cohesion pressure is decreased

Answer

there is no cohesion pressure

Answer

none of the above

Question 16

To avoid an interruption in the flow of a syphon, an air vessel is provided

Accepted Answer

at the summit

Answer

at the inlet

Answer

at the outlet

Answer

ay any point between inlet and outlet

Answer

none of the above

Question 17

The vapour pressure over the concave surface is

Accepted Answer

less than the vapour pressure over the plane surface

Answer

equal to the vapour pressure over the plane surface

Answer

greater than the vapour pressure over the plane surface

Answer

zero

Answer

none of the above

Question 18

The process of diffusion of one liquid into the other through a semi-permeable membrane is called

Accepted Answer

osmosis

Answer

viscosity

Answer

surface tension

Answer

cohesion

Answer

diffusivity

Question 19

The dimensions of coefficient of viscosity are

Accepted Answer

M¹L^–1T^–1

Answer

M^–1L^–1T^–1

Answer

M¹L¹T^–1

Answer

M^–1L¹T¹

Answer

M¹L^–1T¹

Question 20

The continuity equation is connected with

Accepted Answer

conservation of mass

Answer

viscous/unviscous fluids

Answer

compressibility of fluids

Answer

steady/unsteady flow

Answer

open channel/pipe flow

Question 21

Capillary action is due to the

Accepted Answer

all of the above

Answer

surface tension

Answer

cohesion of the liquid

Answer

adhesion of the liquid molecules and the molecules on the surface of a solid

Answer

none of the above

Question 22

Newton's law of viscosity is a relationship between

Accepted Answer

shear stress and the rate of angular distortion

Answer

shear stress and viscosity

Answer

shear stress, velocity and viscosity

Answer

pressure, velocity and viscosity

Answer

shear stress, pressure and rate of angular distortion.

Question 23

The atmospheric pressure with rise in altitude decreases

Accepted Answer

first slowly and then steeply

Answer

linearly

Answer

first steeply and then gradually

Answer

unpredictable

Answer

none of the above

Question 24

Barometer is used to measure

Accepted Answer

atmospheric pressure

Answer

pressure in pipes, channels etc.

Answer

very low pressure

Answer

difference of pressure between two points

Answer

rain level

Question 25

Piezometer is used to measure

Accepted Answer

very low pressures

Answer

pressure in pipe, channels etc

Answer

atmospheric pressure

Answer

difference of pressure between two points

Answer

flow

Fluid Mechanics Level - 2 - Free MCQ Practice Test with solutions, GATE

MCQ Practice Test & Solutions: Test: Fluid Mechanics Level - 2 (25 Questions)

Which of the following is the unit of kinematic viscosity ?

A one dimensional flow is one which

Alcohol is used in manometers because

Free surface of a liquid tends to contract to the smallest possible area due to force of

Falling drops of water become spheres due to the property of

If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be

The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as

The resultant upward pressure of the fluid on an immersed body is called

The conditions for the stable equilibrium of a floating body are

Poise is the unit of

The buoyancy depends on

The centre of gravity of the volume of the liquid displaced by an immersed body is called

A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury

The capillary rise at 20ºC in a clean glass tube of 1 mm bore containing water is approximately

If the surface of liquid is convex, then

To avoid an interruption in the flow of a syphon, an air vessel is provided

The vapour pressure over the concave surface is

The process of diffusion of one liquid into the other through a semi-permeable membrane is called

The dimensions of coefficient of viscosity are

The continuity equation is connected with

Capillary action is due to the

Newton's law of viscosity is a relationship between

The atmospheric pressure with rise in altitude decreases

Barometer is used to measure

Piezometer is used to measure

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