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Тамақ өндірісі бойынша тест

Total questions: 126

Worksheet time: 1hrs 16mins

Name
Class
Date
1.

Тамақ өндірісінің процестері және аппараттары» пәнінің даму нәтижесінде негізгі технолгиялық процестер

a)

4 groups

b)

3 groups

c)

2 groups

d)

6 groups

e)

5 groups

2.

Өту жылдамдығы химиялық кинетикалық заңдарымен анықталатын процес.

a)

Механикалык

b)

hydromechanical

c)

thermal

d)

mass transfer

e)

mixed

3.

The passing speed of hydromechanical processes is determined by __________ laws.

a)

hydrodynamics

b)

heat transfer

c)

diffusion

d)

chemical kinetics

e)

absorption

4.

Which process's passing speed is determined by the laws of heat transfer (methods of heat distribution)?

a)

heat processes

b)

mechanical processes

c)

hydromechanical processes

d)

periodic action processes

e)

mass transfer processes

5.

The type of process characterized by the transition of the components from one phase to another.

a)

mass transfer

b)

heat transfer

c)

light transfer

d)

substance transfer

e)

mechanical

6.

According to the method of organization, the main processes are classified into how many types?

a)

3 types

b)

4 types

c)

5 types

d)

2 types

e)

6 types

7.

The entire stage of the process is carried out simultaneously, but at different points in the apparatus volume.

a)

in continuous action processes

b)

in periodic action processes

c)

in closed action processes

d)

in mixed action processes

e)

in independent action processes

8.

The type of processes where raw material is loaded into the apparatus within a certain time, and after processing, finished products are obtained from the apparatus:

a)

in periodic action processes

b)

in continuous action processes

c)

in closed action processes

d)

in mixed action processes

e)

in independent action processes

9.

The advantage of continuous processes compared to periodic processes:

a)

since there is no pause in work, the heat supplied is fully utilized

b)

finished products are obtained periodically

c)

it is difficult to mechanize and automate the process

d)

the quality of the obtained product is uneven

e)

operational costs are high

10.

Density is measured in the SI system in ____.

a)

kg/m3

b)

kg/m2

c)

kg/cm3

d)

g/m3

e)

g/cm3

11.

The mass in the unit of volume of a substance is called

a)

the density of the substance

b)

the viscosity of the substance

c)

the pressure of the substance

d)

the resistance of the substance

e)

the amount of substance

12.

Hydrostatic pressure arises in a liquid due to

a)

the effects of surface and mass forces

b)

the effects of surface forces

c)

the effects of mass forces

d)

the effects of volumetric and mass forces

e)

the effects of density forces

13.

What is the unit of pressure in the SI system?

a)

PASCAL

b)

AMPERE

c)

KELVIN

d)

NEWTON

e)

JOULE

14.

Processes are studied in laboratory model devices because...

a)

research at scale is very difficult and expensive

b)

according to the demands of the time

c)

it is efficient for mathematical analysis

d)

to use time efficiently

e)

the efficiency coefficient increases

15.

Physical modeling is based on ___________ laws.

a)

the theory of similarity

b)

the theory of analysis

c)

the theory of induction

d)

the theory of deduction

e)

the theory of scaling

16.

The method of studying phenomena or complex physical processes and devices through the creation of their mathematical models is called...

a)

mathematical modeling

b)

physical modeling

c)

theoretical modeling

d)

material modeling

e)

ideal modeling

17.

The main ____ type of similarity theory will be:

a)

4

b)

3

c)

2

d)

5

e)

6

18.

This similarity shows the stability of the ratio of the corresponding geometric dimensions of two devices.

a)

geometric similarity

b)

similarity over time

c)

physical similarity

d)

initial and boundary condition similarity

e)

invariants and number similarity

19.

If similar processes/phenomena are described by the same similarity numbers and their similarity indicator is equal, then it is...

a)

Newton-Bertrand theorem

b)

Buckingham-Federman theorem

c)

Kirpichev-Gukhman theorem

d)

Mendeleev-Kliperon theorem

e)

Hooke-Rebinder theorem

20.

The theorem that expresses the solution of a differential equation constructed from the connection of the quantities affecting the process through the relationship of the dimensionless complexes formed by these quantities, i.e., through the similarity numbers is...

a)

Buckingham-Federman theorem

b)

Newton-Bertrand theorem

c)

Kirpichev-Gukhman theorem

d)

Mendeleev-Kliperon theorem

e)

Hooke-Rebinder theorem

21.

Phenomena that are expressed by the same system of differential equations and maintain the similarity of the conditions of uniqueness are...

a)

Kirpichev-Gukhman theorem

b)

Newton-Bertrand theorem

c)

Buckingham-Federman theorem

d)

Mendeleev-Kliperon theorem

e)

Hooke-Rebinder theorem

22.

The main construction requirements for devices are...

a)

ease of transport and repair

b)

having many parts

c)

high labor costs

d)

having a large mass of parts

e)

using nanotechnology

23.

In many food industries...

4 lines
24.

If the devices are made of plain steel or cast iron, then...

a)

the inner surface is coated with a protective layer

b)

the outer surface is coated with a protective layer

c)

the protective layer is unnecessary

d)

it will be lightweight

e)

it requires many materials

25.

Due to its high corrosion resistance and thermal conductivity, ______ is used in the production of heat exchangers, rectification, etc.

a)

copper

b)

lead

c)

cast iron

d)

plastic

e)

polyethylene

26.

The type of vitamin stored in food prepared in aluminum containers

a)

C

b)

A

c)

B and V

d)

B

e)

V

27.

Aluminum is widely used in the production of devices in brewing and dairy industries because....

a)

it oxidizes in the air and is coated with a thin oxide layer

b)

it has heat exchanger properties in the air

c)

it has high rectification properties

d)

it is difficult to bond with other products

e)

it is resistant to acid and heat

28.

Materials used in the production of devices, pipes in winemaking and dairy factories, which have chemical durability, low thermal resistance coefficient, low hydraulic resistance coefficient, are non-flammable and non-hygroscopic.

a)

glass

b)

steel

c)

copper

d)

rubber

e)

wood

29.

Enamel, ceramic acid-resistant tiles, epoxy resins are used...

a)

to protect the working surface of devices from corrosion

b)

to protect the working surface of devices from wear

c)

for packaging food products

d)

for chemical and mechanical strength

e)

for aggressive or high-temperature environments

30.

The process of separating solid bodies under the influence of mechanical forces...

a)

is called crushing

b)

is called separation

c)

is called sorting

d)

is called mixing

e)

is called sedimentation

31.

If a certain shape is given to the particles along with crushing, then this process...

a)

is called cutting

b)

is called crushing

c)

is called separation

d)

is called sorting

e)

is called mixing

32.

Types of effects (deformation) used in crushing.

a)

compression, impact, bending, rubbing, and separation

b)

separation, mixing, suction

c)

compression, rubbing, mixing

d)

bending, crushing, and transporting

e)

cutting, enameling, extruding

33.

What determines the efficiency of crushing?

a)

the degree of crushing

b)

the intensity of crushing

c)

the stages of crushing

d)

fine

34.

What determines the efficiency of crushing?

a)

degree of crushing

b)

intensity of crushing

c)

stages of crushing

d)

types of crushing

e)

all of the above

35.

What is the ratio of the sizes of material particles before (D) and after (d) crushing called?

a)

degree of crushing

b)

intensity of crushing

c)

stages of crushing

d)

types of crushing

e)

all of the above

36.

Show the excess of the given types of crushing.

a)

throttling crushing

b)

coarse crushing

c)

medium crushing

d)

fine crushing

e)

colloidal crushing

37.

Show the equation of the total work done by external forces in crushing.

a)

A=AП+ AБ = K1*ΔV+K2*ΔF

b)

A=AП-AБ = K1*ΔV-K2*ΔF

c)

A=AП*AБ = K1*ΔV*K2*ΔF

d)

A=AП/AБ = K1* ΔV/K2*ΔF

e)

A=AПAБ = K1ΔVK2ΔF

38.

The work done in crushing is proportional to the volume or mass of the crushed particle.

a)

Kik-Kirpichev's crushing hypothesis

b)

Rettinger's crushing hypothesis

c)

Stokes' crushing hypothesis

d)

Karl-Marx's crushing hypothesis

e)

Rebinders' crushing hypothesis

39.

The work done in crushing is proportional to the newly formed surface.

a)

Rittinger's hypothesis

b)

Kik-Kirpichev's hypothesis

c)

Stokes' hypothesis

d)

Karl-Marx's hypothesis

e)

Rebinders' hypothesis

40.

Show the types of crushers.

a)

jaw, conical, shaft

b)

hammer, throttling, angular

c)

box, boxless, mixed

d)

powerful, disintegrator, channel

e)

disk, bunker, spiral

41.

What does the structure of a jaw crusher consist of?

a)

fixed and movable jaws

b)

shafts rotating in opposite directions

c)

semi-rotating eccentric shaft

d)

shaft loosely fixed to the rod

e)

coloriferous layer

42.

What methods are used to crush material in conical crushers?

a)

Compression and rubbing

b)

Impact and squeezing

c)

Crushing and striking

d)

Rubbing and hitting

e)

Compression and pushing

43.

In which type of crusher is the material fed between stationary and internal rotating cones?

a)

conical crusher

b)

powerful crusher

c)

hammer crusher

d)

shaft crusher

e)

jaw crusher

44.

To which crusher does the productivity formula M=k*D2*L*n2/3600(i-1) belong?

a)

hammer crusher

b)

disintegrator

c)

stabilizer

d)

conical crusher

e)

jaw crusher

45.

What formula can be used to approximately calculate the productivity of a shaft crusher?

a)

M=b*l*D*n*60

b)

M=ρ*g*h*60

c)

S=ρφ60

d)

G=πnω2/60

e)

F=KX

46.

What type of device is crushed material crushed between horizontal shafts using compression and rubbing methods?

(a)  

47.

What type of device is used for crushing and grinding materials between horizontal shafts using compression and rubbing methods?

a)

shaft crusher

b)

impact crusher

c)

hammer crusher

d)

cone crusher

e)

jaw crusher

48.

Which type of crusher consists of two disks fixed on the axis?

a)

disintegrators

b)

hammer crushers

c)

stabilizers

d)

cone crushers

e)

jaw crushers

49.

What type of crusher is characterized by high efficiency of grinding, absence of rotating parts, and the ability to combine the grinding process with other processes (e.g., drying, pumping, extraction)?

a)

impact crusher

b)

cone crusher

c)

hammer crusher

d)

shaft crusher

e)

jaw crusher

50.

What does the formula PO.T.=mω2R define?

a)

centrifugal force

b)

friction

c)

gravity force

d)

Archimedes' force

e)

productivity

51.

What does the formula ω=πn/30 define?

a)

angular velocity

b)

linear velocity

c)

composite velocity

d)

average velocity

e)

planar velocity

52.

What does the formula i=D/d define?

a)

degree of grinding

b)

grinding intensity

c)

grinding stages

d)

types of grinding

e)

all of the above

53.

What do we call the processing of materials under pressure?

a)

we call it pressing

b)

we call it grinding

c)

we call it cutting

d)

we call it mixing

e)

we call it separating

54.

What goals does pressing aim to achieve?

a)

separation, shaping, compacting

b)

suction, pumping, rectification

c)

cutting, finishing, compacting

d)

mixing, separating, shaping

e)

separating, compacting, pumping

55.

What two purposes can the squeezing of liquids from solids serve?

a)

as valuable and worthless components

b)

as liquid and viscous components

c)

as special and profile components

d)

as viscous and thick components

e)

as elastic and flexible components

56.

What are the devices classified as based on their operating actions?

a)

divided into periodic and continuous

b)

divided into upper and lower

c)

divided into layered and non-layered

d)

divided into leading and driven

e)

divided into slow and fast

57.

What do we call the process of separating bulk mixtures into different fractions?

a)

it is called sorting process

b)

it is called bulk process

c)

it is called separation process

d)

it is called sedimentation process

e)

it is called multiplication process

58.

How many main methods of sorting bulk materials are there based on the properties of the fractions to be separated?

a)

4

b)

3

c)

2

d)

5

e)

6

59.

What is sorting based on the shape and size of particles?

4 lines
60.

How many main methods of sorting bulk materials are there?

a)

4

b)

3

c)

2

d)

5

e)

6

61.

What equipment is used for sorting by the shape and size of particles?

a)

sieves and triers

b)

flat and conical

c)

gaseous and liquid

d)

disintegrators

e)

settlers and filter separators

62.

What does the separation in gaseous and liquid environments depend on?

a)

settling velocity

b)

electrostatic and flotation methods

c)

electromagnetic properties

d)

using sieves and triers

e)

infrared rays

63.

What is the basis for sorting particles with the help of sieves?

a)

by volume

b)

by mass

c)

by density

d)

by weight

e)

by pressure

64.

How many types of sieves are used in the food industry?

a)

two

b)

three

c)

four

d)

five

e)

six

65.

What shape do woven mesh sieves have?

a)

square or rectangular

b)

rhombus-shaped

c)

triangular and round

d)

checkerboard or random

e)

polygonal

66.

How many different methods of repeated sorting are there?

a)

three

b)

two

c)

four

d)

five

e)

six

67.

List the types of repeated sorting.

a)

from coarse to fine, from fine to coarse

b)

assembled, welded

c)

from fine to coarse, from coarse to very large

d)

from coarse to fine, from fine to very small

e)

from bottom to top, from top to bottom

68.

What type of movement do cylindrical sieves make?

a)

rotational movement

b)

reciprocating

c)

translational

d)

vibrational

e)

oscillatory

69.

Show the type of sieve that makes reciprocating-translational or vibrational movement.

a)

flat sieves

b)

cylindrical sieves

c)

conical sieves

d)

eccentric sieves

e)

inclined sieves

70.

What are cylindrical or conical sieves also called?

a)

Burat

b)

Drum

c)

Independent

d)

Trier

e)

Screw

71.

The productivity of a rotary sorter increases as the drum's rotation frequency increases.

a)

increases

b)

decreases

c)

doubles

d)

decreases significantly

e)

remains unchanged

72.

What types of particles cannot be separated by sieves?

a)

having the same cross-section but different lengths

b)

having the same width and height but different lengths

c)

having the same length but different width and height

d)

having the same cross-section and length

e)

having the same width and length but different heights

73.

What is the filtration process?

a)

a process that passes suspensions, dust, liquids, and gases while retaining solid particles with the help of porous barriers

b)

in suspensions and emulsions

74.

What is the process of centrifugation?

a)

Separation process under the influence of centrifugal force in suspensions and emulsions

b)

A process that passes suspensions, dust, liquids, and gases while retaining solid particles with porous barriers

c)

The process of separating bulk mixtures into different fractions

d)

A process performed by compacting, pressing, or briquetting bulk materials

e)

The process of reducing stress in a body under constant, known deformation

75.

What do we call the process of separation with liquid?

a)

Separation of solid particles in dust, smoke, and fog with the help of liquid

b)

Separation under the influence of centrifugal force in suspensions and emulsions

c)

Passing suspensions, dust, liquids, and gases

d)

Separation of bulk mixtures into different fractions

e)

Compaction of bulk materials

76.

In food technology, processes used to intensify heat and mass transfer, ensuring uniform formation of one medium in another within this volume...

a)

Mixing

b)

Sorting

c)

Kneading

d)

Separation

e)

Pumping

77.

What is the number of main methods for mixing liquid media?

a)

Three

b)

Two

c)

Four

d)

Five

e)

Six

78.

Mixers with different blade structures are...

a)

Called mechanical mixers

b)

Called pneumatic mixers

c)

Called circulating mixers

d)

Called turbulent mixers

e)

Called laminar mixers

79.

Show the main types of mixing liquid media.

a)

Mechanical, pneumatic

b)

Mechanical, laminar

c)

Turbulent, circulating

d)

Circulating, laminar

e)

Pneumatic, turbulent

80.

The type of mixer used when the chemical activity of the liquid being mixed is high and chemical interaction with gas (e.g., oxygen in air) is required.

a)

Pneumatic mixer

b)

Mechanical mixer

c)

Circulating mixer

d)

Turbulent mixer

e)

Laminar mixer

81.

A device that repeatedly sucks and pumps by using centrifugal pumps or flow pumps.

a)

Circulating mixer

b)

Mechanical mixer

c)

Pneumatic mixer

d)

Turbulent mixer

e)

Laminar mixer

82.

How is the Euler number denoted?

4 lines
83.

How is the Euler number denoted?

a)

Eu

b)

EN

c)

Ku

d)

Re

e)

NE

84.

How is the Reynolds number denoted?

a)

Re

b)

EN

c)

Ku

d)

Eu

e)

NE

85.

Another name for the modified Euler number?

a)

power criterion

b)

experimental power

c)

modified Reynolds number

d)

experiment criterion

e)

aggregate criterion

86.

Show the modified Euler number.

a)

Eu=N/ρn3d5

b)

Re=ρn3d5/μ

c)

Ku=N/μ

d)

NE=ρn3d5/N

e)

EN=ρnd

87.

Show the modified Reynolds number.

a)

Re=ρn3d5/μ

b)

Eu=N/ρn3d5

c)

Ku=N/μ

d)

NE=ρn3d5/N

e)

EN=ρnd

88.

There are two different modes when mixing mechanical mixers and liquids:

a)

laminar, turbulent

b)

mechanical, circulating

c)

turbulent, pneumatic

d)

circulating, laminar

e)

pneumatic, mechanical

89.

What happens when Re>30?

a)

the liquid mixes gently with the mixing blades.

b)

the liquid mixes intensively with the mixing blades.

c)

the liquid mixes moderately with the mixing blades.

d)

the liquid mixes outside the mixing blades gently.

e)

the liquid mixes outside the mixing blades strongly.

90.

What happens when Re>102?

a)

a turbulent regime occurs

b)

a laminar regime is maintained

c)

the liquid mixes gently with the mixing blades.

d)

a developed turbulent regime occurs

e)

a automodel regime occurs

91.

What happens when Re>105?

a)

in this case, the value of KN does not depend on the value of Re.

b)

a turbulent regime occurs

c)

a laminar regime is maintained

d)

the liquid mixes outside the mixing blades gently.

e)

the liquid mixes gently with the mixing blades.

92.

The time taken to achieve a given result of the technological process or the number of revolutions of the mixer in a given time is defined as

a)

mixing intensity

b)

mixing quality

c)

mixing time

d)

mixing period

e)

mixing schedule

93.

What does the quality of the mixing process depend on?

a)

the energy given to the mixing devices and the liquid being mixed

b)

the power consumed by mechanical mixers in the mixing process

c)

the graph-analytical calculation method of mixers

d)

the criterion equation of mixing

e)

the evaporation potential of the mixing phase

94.

What should pneumatic mixing devices be equipped with?

4 lines
95.

What should pneumatic mixing devices be equipped with?

a)

barboter and airlift

b)

brush and pump

c)

mixer and valve

d)

valve and throttle

e)

pipe and line

96.

What is a barboter?

a)

a multi-holed ring or spiral pipe installed at the bottom of the device

b)

a device designed to extract groundwater from a well by displacing air with a compressor

c)

a hydromachine that ensures the vigorous movement of liquids

d)

a part or mechanism that regulates the flow of gas, steam, or liquid by narrowing or widening the passage in tires and pipes

e)

an inductive coil connected in series to the load to eliminate (suppress) or limit the variable frequency of electric current

97.

In which mixing is compressed air supplied to the central circulation pipe?

a)

in airlift mixing

b)

in barboter mixing

c)

in mechanical mixing

d)

in circulation mixing

e)

in pneumatic mixing

98.

The simplest mixing method used for transporting liquids is?

a)

mixing in pipes

b)

ejector mixing

c)

pump mixing

d)

spraying mixing

e)

diaphragm mixing

99.

The easiest and cheapest method of separating heterogeneous systems compared to other methods is?

a)

sedimentation

b)

mixing

c)

centrifugation

d)

filtration

e)

grinding

100.

Where are periodic action settlers located?

a)

in lower height basins

b)

inside the body

c)

outside the body

d)

on the top of the device

e)

at the bottom of the devices

101.

What equation determines the required sedimentation area?

a)

F=VM/ωкг

b)

N=VM/ωкг

c)

S=VM/ωкг

d)

G=VM/ωкг

e)

M=VM/ωкг

102.

In industry, ___________ settlers are most commonly used.

a)

continuous action

b)

full action

c)

periodic action

d)

intermittent action

e)

semi-continuous action

103.

Continuous action devices are __________________.

a)

single, double, and multi-layered

b)

the bottom is usually conical, and the top is cylindrical

c)

conical bunker type

d)

located in lower height basins

e)

located in higher basins

104.

How do settlers with sloping barriers operate?

a)

semi-continuous

b)

intermittent

c)

continuous

d)

periodic

e)

cyclic

105.

WГ=Reμ0/d*ρ0 is the formula determining which sedimentation velocity?

a)

Lyashenko

b)

Stokes

c)

Euler

d)

Reynolds

e)

Rebinder

106.

WГ=d2(ρ0-ρi)*g/18μ0 is the formula determining which sedimentation velocity?

a)

Stokes

b)

Lyashenko

c)
d)
e)
107.

Who is the formula that determines the sedimentation rate WГ=d2(ρ0-ρi)*g/18μ0?

a)

Stokes

b)

Lyashenko

c)

Euler

d)

Reynolds

e)

Rebinder

108.

What are the devices where mechanical processes occur called?

a)

machines

b)

devices

c)

installations

d)

machines and installations

e)

devices and installations

109.

What processes obey the same law in the hydromechanical group?

a)

separation of liquids by gravity and centrifugal forces, liquid transportation

b)

rectification, drying

c)

sorting, grinding

d)

cooling, melting, heating, freezing

e)

adsorption, absorption

110.

What are the devices where complex thermodynamic, chemical, and biochemical processes occur?

a)

devices

b)

installations

c)

machines

d)

machines and devices

e)

cutting machines

111.

What processes obey the same law in the mechanical group?

a)

sorting, grinding

b)

separation of liquids by gravity and centrifugal forces, liquid transportation

c)

rectification, drying

d)

cooling, melting, heating, freezing

e)

adsorption, absorption

112.

What processes obey the same law in the mass exchange group?

a)

rectification, drying

b)

separation of liquids by gravity and centrifugal forces

c)

sorting, grinding

d)

cooling, melting, heating, freezing

e)

transportation of liquid

113.

In which century was the science about processes and devices discovered?

a)

20th century

b)

19th century

c)

18th century

d)

17th century

e)

16th century

114.

What is meant by the hydromechanical process?

a)

a process defined by the laws of hydrodynamics and mechanics

b)

the process of heat transfer from a hot body to a cold body

c)

the transition of substances from one phase to another in different aggregate states

d)

the process of pure mechanical interaction of bodies

e)

the process of studying stationary liquids

115.

What is meant by the heat transfer process?

a)

the process of heat transfer from a hot body to a cold body

b)

the transition of substances from one phase to another in different aggregate states

c)

the process of pure mechanical interaction of bodies

d)

a process related to the change in the chemical composition of a substance

e)

a process defined by the laws of hydrodynamics and mechanics

116.

What is meant by the mass exchange process?

a)

the transition of substances from one phase to another in different aggregate states

b)

the process of heat transfer from a hot body to a cold body

c)

the process of pure mechanical interaction of bodies

d)

a process related to the change in the chemical composition of a substance

e)

a process defined by the laws of hydrodynamics and mechanics

117.

Mechanics

4 lines
118.

What are mechanical processes?

a)

Pure mechanical interaction with bodies

b)

The transition of substances in different aggregate states from one phase to another

c)

The process of heat transfer from a hot body to a cold body

d)

Related to the change in the chemical composition of a substance

e)

A process determined by the laws of hydrodynamics and mechanics

119.

What are chemical and biochemical processes?

a)

Related to the change in the chemical composition of a substance

b)

Pure mechanical interaction of bodies

c)

The transition of substances in different aggregate states from one phase to another

d)

The process of heat transfer from a hot body to a cold body

e)

A process determined by the laws of hydrodynamics and mechanics

120.

What processes are determined by the mechanical-hydraulic law?

a)

Hydromechanical

b)

Heat circulation

c)

Mass circulation

d)

Mechanical

e)

Chemical and biochemical

121.

What is the process of heat transfer from a hot body to a cold body called?

a)

Heat exchange

b)

Hydromechanical

c)

Mass exchange

d)

Mechanical

e)

Chemical and biochemical

122.

What processes are related to the transition of substances in different aggregate states from one phase to another?

a)

Mass exchange

b)

Heat exchange

c)

Hydromechanical

d)

Mechanical

e)

Chemical and biochemical

123.

What is the pure mechanical process of interacting bodies?

a)

Mechanical

b)

Mass exchange

c)

Heat exchange

d)

Chemical and biochemical

e)

Hydromechanical

124.

What processes are related to the change in properties and chemical composition of substances?

a)

Chemical and biochemical

b)

Mechanical

c)

Mass exchange

d)

Heat exchange

e)

Hydromechanical

125.

What is the surface tension coefficient?

a)

The work spent on the formation of 1m2 of new surface

b)

The work spent on the formation of 1m2 of old surface

c)

The work spent on the formation of 1m2 of thin surface

d)

The work spent on the formation of 1m2 of solid surface

e)

The work spent on the formation of 1m2 of soft surface

126.

Under what conditions does the surface tension force arise?

a)

From the attraction of uncompensated internal molecules to free surface molecules

b)

From the attraction of compensated internal molecules to free surface molecules

c)

In gas

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