Fluids

Question 1

Force acting perpendicular to the surface is called

Answer 1

Thrust

Question 2

The force or unit area acting on an object called

Answer 2

Pressure=
Thrust/area of contact
Si unit of thrust N
Si Unit of pressure. Pascal or
Pressure unit N/m^2

Question 3

Pressure exerted by a liquid at a point is determined by

Answer 3

Depth
density of liquid
acceleration due to gravity

Question 4

Pressure due to a liquid colum

Answer 4

¶hg

Question 5

Mass of the liquid

Answer 5

Volume of liquid × density
¶v

Question 6

The instrument used to measure atmospheric pressure is called

Answer 6

Barometer

Question 7

The Mercury barometer first designed by an Italian physicist

Answer 7

Torricelli

Question 8

On your typical day at sea level the height of Mercury column is

Answer 8

760 mm
76 cm

Question 9

1atm=
1bar

Answer 9

1atm=1.01310^5 pa
1bar= 110^5pa
1atm=1.013 bar

Question 10

On which one metre square of surface the force acting is

Answer 10

1.013 kN

Question 11

1 absolute pressure is zero reference against
2 Gauge pressure is zero reference against

Answer 11

1 Perfect vacuum
2 atmospheric pressure

Question 12

In petrol bunks the tyre pressure of vehicle is measured in a unit called

Answer 12

Pascal per inch ( psi)

Question 13

The law state that external pressure applied on a in compressible liquid is transmitted uniformly throughout the liquid

Answer 13

Pascal’s law
Blaise Pascal
French
1623-1662

Question 14

Pascal’s law became the basis for one of the important machines ever developed

Answer 14

Hydraulic press

Question 15

The hydraulic system working in this way are known as

Answer 15

Force Multiplier

Question 16

The SI unit of density is

Answer 16

Kilogram per metre cube

Question 17

The density of substances is

Answer 17

Mass/volume of substances

Question 18

Generally density of substance is compare with the density of water at 4 degree Celsius because density of water at this temperature is

Answer 18

1g/cm^3

Question 19

Density of any other substance with respect to the density of water at 4 degree Celsius is called

Answer 19

Relative density
or specific gravity (if the referenced substances is water)

Question 20

The ratio of mass of a given volume of a substance to the mass of an equal volume of water at 4 degree Celsius denotes

Answer 20

Relative density
or specific gravity (if the referenced substances is water)

Question 21

Relative density can be measured using

Answer 21

Pycnometer or density bottle

Question 22

Density bottle can be used to measure

Answer 22

Relative density
or specific gravity (if the referenced substances is water)

Question 23

If the density of a substance is less than the density of liquid

Answer 23

It will float

Question 24

A direct reading instrument used for measuring the density are relative density of a liquid is called

Answer 24

Hydrometer

Question 25

Hydrometer is based on the principle of

Answer 25

Principal of flotation The weight of a liquid displaced by the immersed portion of hydrometer is equal to weight of the hydrometer

Question 26

Hydrometer maybe calibrator for different uses such as

Answer 26

Lactometer saccharometer alcoholometers

Question 27

Density of milk is measured by Density of sugar in a liquid measured by Higher level of alcohol in spirits is measured by

Answer 27

Lactometer Saccharometer Alcoholometers

Question 28

Lactometer work on the principle of

Answer 28

Gravity of milk

Question 29

The pressure is more on the bottom less are the top of the liquid. This pressure difference causes a force on the object and pushes it upward. This course is called______&. Phenomenon is called_______

Answer 29

Buoyant force Buoyancy

Question 30

Saltwater provides more Buoyant force than freshwater

Answer 30

Buoyant Force depends as much on the density of liquid as on the volume displaced

Question 31

_________is an instrument that demonstrate the principle of buoyancy

Answer 31

Cartesian driver

Question 32

Archimedes principle is the consequence of ________ law

Answer 32

Pascal

Question 33

Archimedes devised principles of the________ after he noticed his own apparent loss in weight while sitting in his bath

Answer 33

Hydrostatic balance

Question 34

Archimedes principle

Answer 34

State the body immersed in a fluid experiences vertical upward buoyant force equal to the weight of the fluid it displaces

Question 35

The correct lactometer reading is obtained only at the temperature of

Answer 35

60°F

Question 36

Law of flotation

Answer 36

The weight of your floating body in a fluid is equal to weight of the fluid displaced by the body The centre of gravity of the floating body and the centre of buoyancy are in the same vertical line

Question 37

Flotation therapy uses water that contain Epson salt rich in

Answer 37

Magnesium As a floater glasses relaxes he or she is obsorbing this magnesium through the skin. Magnesium body to process insulin which lower a person's risk of developing type 2 diabetes

Question 38

Cartesian driver is an experiment which demonstrate the principle of

Answer 38

Buoyancy and ideal gas law

Question 39

Unit of relative density

Answer 39

No unit

Question 40

_____ is a device used to measure the relative density of liquid based on the Archimedes principle

Answer 40

Hydrometer

Question 41

lactometer Is a device used to check the purity of milk by measuring you its density using

Answer 41

Archimedes principle

Question 42

Clouds float in atmosphere because of the their

Answer 42

Low Density

Question 43

They drinking straw work on the existence of

Answer 43

Atmospheric pressure

Question 44

1gwt

Answer 44

980 dyne

Question 45

The frictional force exerted by fluids is also called .

Answer 45

drag