2022 G2 power station boiler stoker examination question bank and G2 power station boiler stoker simulation examination question bank

Source of question bank ： Safety production simulation test, a little public official account.

Pass the safety production simulation exam at one point ：G2 The examination question bank of utility boiler stoker is generated by one point of safety production simulation examination ,G2 The question bank of simulated examination for boiler certificate of utility boiler is based on G2 Compilation of the latest edition of teaching materials for utility boiler stokers G2 Simulation examination of utility boiler stoker .2022 year G2 The examination question bank of utility boiler stoker and G2 Question bank of power station boiler stoker simulation examination

1、【 Multiple choice 】 Boiler heat load can be divided into （）.（  ABC  ）

A、 Volumetric heat load

B、 Section heat load

C、 Wall heat load of burner area

D、 Heat load of evaporation heating surface

2、【 Multiple choice 】 Function of boiler economizer （）.（  ABC  ）

A、 Increase feed water temperature

B、 Reduce the exhaust temperature

C、 Improve boiler thermal efficiency

D、 Reduce sulfur dioxide emissions

3、【 Multiple choice 】 The boiler wall shall meet the following requirements: （）.（  ABCD  ）

A、 Good insulation

B、 Good sealing

C、 Adequate heat resistance

D、 Certain mechanical strength

4、【 Multiple choice 】 According to the heat transfer mode of the boiler （）.（  ABC  ）

A、 Convection superheater ,

B、 Radiant superheater ,

C、 Semi radiant superheater

5、【 Multiple choice 】 The secondary maintenance of the boiler body includes （）.（  AD  ）

A、 Check the water wall 、 Convection tube 、 Deformation of superheater , Replace the broken pipe

B、 Check that there is no serious deformation on the outer surface of the boiler

C、 Inspection manhole 、 Handhole , Clear the leak

D、 Repair boiler welds and expansion joints

6、【 Multiple choice 】 According to the heat transfer mode , Superheater can be divided into （）.（  ABC  ）

A、 Convection

B、 Radiant

C、 Semi radiant

7、【 Multiple choice 】 There are the following （） One of the situations , It can be identified as a serious potential accident .（  ABCD  ）

A、 Using illegally produced special equipment ;

B、 Used beyond the specified parameter range of special equipment ;

C、 Missing security attachment 、 Safety device , Or safety accessories 、 The safety device fails and continues to be used ;

D、 Using special equipment that should be scrapped or judged to be unqualified through inspection .

8、【 Multiple choice 】 The components of flue gas produced by complete combustion of fuel include （）.（  ABCD  ）

A、 Carbon dioxide

B、 Sulfur dioxide

C、 nitrogen

D、 water

9、【 Multiple choice 】 The coal used in the power plant is divided into （）.（  ABCD  ）

A、 Anthracite ;

B、 Lean coal ;

C、 Bituminous coal ;

D、 Brown coal ;

10、【 Multiple choice 】 The general characteristics of coal are （）.（  ABCD  ）

A、 Fineness of pulverized coal

B、 Uniformity of pulverized coal

C、 Economic fineness of pulverized coal

D、 Grindability index of coal

11、【 Multiple choice 】 The combustion characteristic indexes of coal include （）.（  ABCDE  ）

A、 Hydrocarbon ratio 、

B、 Fuel efficiency ratio 、

C、 Reaction index 、

D、 Combustion characteristic curve of coal 、

E、 Ignition stability index of coal

12、【 Multiple choice 】 The theoretical amount of air is obtained by adding the amount of air required for the combustion of which elements of the fuel ？（）（  ABCD  ）

A、 carbon

B、 hydrogen

C、 Sulfur and

D、 The amount of oxygen in the fuel itself

13、【 Multiple choice 】π The advantages of a shaped boiler arrangement include （）.（  ABCD  ）

A、 The arrangement of heating surface is convenient

B、 The working medium adapts to upward flow

C、 The heating surface is easy to be arranged in the form of countercurrent

D、 Strengthen convective heat transfer

14、【 Multiple choice 】 Coal for power generation is mainly classified according to the content of volatile matter in coal , Generally divided into （） A few categories: .（  ABCD  ）

A、 Anthracite

B、 Lean coal

C、 Bituminous coal

D、 Brown coal

15、【 Multiple choice 】 Combustion mode of modern pulverized coal boiler （）.（  ABD  ）

A、 Tangential combustion mode

B、 Front and rear wall opposed combustion mode

C、 Ordinary combustion mode

D、W Shape flame combustion mode .

16、【 Multiple choice 】 Dry based industrial analysis of coal includes （）.（  ABC  ）

A、 ash content

B、 Volatile matter

C、 Fixed carbon

D、 Coke

17、【 Multiple choice 】 Combustion adjustment includes （）.（  ABC  ）

A、 Fuel injection quantity adjustment

B、 Supply air volume adjustment

C、 Flame adjustment

18、【 Multiple choice 】 According to the characteristics of outlet air flow, the air distributor can be divided into （）.（  AC  ）

A、 Swirl

B、 Axial vane type

C、 DC type

D、 Tangential vane type

19、【 Multiple choice 】 What do the main furnace thermal characteristic parameters depend on ？（）（  ABC  ）

A、 Boiler capacity parameters

B、 Fuel characteristics

C、 Combustion mode

D、 Boiler load

20、【 Multiple choice 】 The structural forms of superheater and reheater are （）.（  ABDE  ）

A、 Radiant

B、 Semi radiant

C、 Full radiation

D、 Convection

E、 Clad superheater

21、【 Multiple choice 】 What are the factors affecting the overall layout of the boiler ？（）（  ABCD  ）

A、 Steam parameters

B、 Boiler capacity

C、 Fuel properties

D、 Hot air temperature

22、【 Multiple choice 】 The factors causing fly ash wear of economizer are （）.（  ABCD  ）

A、 Ash particle characteristics

B、 Fly ash concentration

C、 Flue gas velocity

D、 Arrangement and scouring mode of tube bundles

23、【 Multiple choice 】 Separable （） export office 、（） export office 、（） At the inlet and outlet and at the once through boiler （）, Safety valves must be installed .（  ABCD  ）

A、 Economizer

B、 Steam superheater

C、 Reheater

D、 Start the separator

24、【 Multiple choice 】 Under what conditions SO2 Will be further oxidized to form SO3？（  ABC  ）

A、 Combustion produces sulfur trioxide

B、 Catalysis produces

C、 Salt decomposes into SO3

D、 Combustion produces carbon dioxide

25、【 Multiple choice 】 The function of the coal pulverizer （）.（  AB  ）

A、 dry ,

B、 Coal grinding

26、【 Multiple choice 】 The difference between the two types of heat transfer deterioration is （）.（  ABCD  ）

A、 Different flow structures

B、 The heat transfer mechanism is different

C、 Occurs in different locations

D、 The surface heat transfer coefficient is different

27、【 Multiple choice 】 The flue gas from thermal power plants will cause air pollution , The main pollutants are （）.（  ABC  ）

A、 Sulfur dioxide

B、 Dust

C、 Nitrogen oxides

D、 Trace heavy metals

28、【 Multiple choice 】 The following factors that affect the fly ash wear of economizer are （）.（  ABCD  ）

A、 Fly ash characteristics

B、 Fly ash concentration

C、 Arrangement and scouring mode of tube bundles

D、 Flue gas velocity

29、【 Single topic selection 】 The ash content of dry basis should not be greater than （）.（  A  ）

A、30%

B、40%

C、45%

D、50%

30、【 Single topic selection 】 When forced flow , The line pressure drop is （） As the main part .（  C  ）

A、 Gravity differential pressure

B、 Gravity differential pressure

C、 Flow resistance

31、【 Single topic selection 】 The internal kinetic energy of a gas is mainly determined by the energy of the gas （）.（  A  ）

A、 temperature ;

B、 pressure ;

C、 Compare ;

D、 density

32、【 Single topic selection 】 The general mechanical properties of furnace materials do not include which of the following options （）.（  D  ）

A、 Mechanical strength

B、 Thermal conductivity

C、 Bulk density

D、 Fire resistance

33、【 Single topic selection 】 What is the flow direction in the air preheater and economizer ？（）（  A  ）

A、 The general flow direction of air and water supply is from top to bottom , And the smoke is always from bottom to top .

B、 The flow direction of air, feed water and flue gas is always from bottom to top .

C、 The flow direction of air, feed water and flue gas is always from top to bottom .

D、 The general flow direction of air and water supply is from bottom to top , And the smoke is always from top to bottom .

34、【 Single topic selection 】 The source of moisture in flue gas does not include which of the following （）.（  A  ）

A、 The mixing of external water

B、 Air carries

C、 The combustion of hydrogen in the fuel produces

D、 Water in the fuel evaporates to form

35、【 Single topic selection 】 During the operation of circulating fluidized bed boiler, there are many kinds of flame colors in the furnace , The color with the highest furnace temperature is （）.（  C  ）

A、 Dark red

B、 yellow

C、 white

36、【 Single topic selection 】 The flushing water level gauge shall be （）.（  B  ）

A、 Once a day

B、 Once per shift

C、 Once a week

37、【 Single topic selection 】 In the heat balance calculation of boiler unit , The heat loss caused by carbon content in smoke exhaust fly ash is （）.（  B  ）

A、 Calculate the heat loss in incomplete combustion of gas

B、 Calculate the heat loss in incomplete combustion of solids

C、 Calculate the heat loss in smoke exhaust

D、 Do not count in any one item

38、【 Single topic selection 】 Among the various heat losses of the boiler , The biggest loss is （）（  C  ）

A、 Heat loss

B、 Chemical incomplete combustion heat loss

C、 Smoke loss

39、【 Single topic selection 】 Which of the following belongs to a furnace where the fuel layer moves along the grate surface ？（）（  B  ）

A、 Hand fired stove

B、 Reciprocating grate

C、 Chain furnace

D、 Coal spreader chain furnace

40、【 Single topic selection 】 Which of the following is a factor that affects the multivaluence of hydrodynamic forces （）（  D  ）

A、 working pressure

B、 Enthalpy of imported working medium

C、 Hot water section resistance

D、 All the other options are right

41、【 Single topic selection 】 The following methods of steam temperature regulation on the steam side are （）.（  A  ）

A、 Spray desuperheater

B、 Flue gas recirculation

C、 Separate the flue

D、 Change the center of the flame

42、【 Single topic selection 】 Which of the following is not the form of tube panel ？（）（  B  ）

A、 The two rings of pipes in the outer ring are shortened

B、 The inner and outer tubes are parallel

C、 The outer ring pipe is short circuited

D、 The outer ring pipe is short circuited , The inner and outer tube panels cross

43、【 Single topic selection 】 When the boiler is boiling , Boiler water is not allowed to enter （）.（  C  ）

A、 The drum ;

B、 Water wall ;

C、 Superheater ;

44、【 Single topic selection 】 The boiler is in operation , The false water level of the steam drum is caused by （） Caused by the .（  C  ）

A、 It cannot be measured accurately under variable working conditions

B、 Volume expansion of steam and water in the furnace under variable working conditions

C、 Expansion and contraction of steam and water in the boiler due to instantaneous sudden rise or drop of drum pressure under variable working conditions

D、 The emergency drain valve forgot to close

45、【 Single topic selection 】 The ignition rod of the burner 、 Indicator light 、 Nozzle 、 Flame stabilizer 、 The oil filter and oil pump filter shall be （） Wash once .（  B  ）

A、 Once a week

B、 monthly

C、 Quarterly

46、【 Single topic selection 】 One of the ways to prevent caustic embrittlement （）.（  C  ）

A、 Improve PH value

B、 Add alkali

C、 Control the relative alkalinity

D、 Deaeration

47、【 Single topic selection 】 Which of the following is not an advantage of direct blowing pulverizing system ？（）（  C  ）

A、 There are few equipment parts

B、 Low power consumption in operation

C、 The system has high reliability

D、 Small pipe resistance

48、【 Single topic selection 】 Platen superheater is （） Heating surface .（  B  ）

A、 Radiant

B、 Semi radiant

C、 Convection

D、 Shunt type

49、【 Single topic selection 】 For large capacity utility boilers , The angle coefficient is usually taken as ？（）（  A  ）

A、1

B、0.95

C、0.8

D、0.75

50、【 Single topic selection 】 Develop and popularize fluidized bed combustion suitable for domestic coal 、 Smokeless combustion and gasification 、 Clean coal technologies such as liquefaction , Increase coal consumption （）（  C  ）

A、： Burning rate

B、： Burn out rate

C、： Utilization efficiency

51、【 Single topic selection 】 The following are not measures to improve the combustion of chain furnace （）.（  D  ）

A、 Sectional air supply

B、 Set the furnace arch

C、 Arrange secondary air

D、 Increase the excess air coefficient

52、【 Single topic selection 】 The electric contact water level gauge uses boiler water and steam （） Designed for the difference between , It overcomes the influence of drum pressure change on water level , It can be used during boiler startup and shutdown and variable parameter operation .（  A  ）

A、 conductivity

B、 density

C、 Heat capacity

D、 resistance

53、【 Single topic selection 】 Bag filter belongs to （） Dust removal device （  C  ）

A、 mechanical

B、 Wet type

C、 Filter type

D、 Electrostatic

54、【 Single topic selection 】 Self compensation characteristics of natural circulation , When the void fraction is not too large, the increase of moving differential pressure （） Increase in flow resistance , With the increase of void fraction, the circulating flow rate （）.（  A  ）

A、 Greater than increasing

B、 Greater than or less than

C、 Less than reduce

D、 Less than increase

55、【 Single topic selection 】 Which of the following is not one of the components of the boiler combustion system ？（）（  D  ）

A、 chamber of a stove or furnace

B、 burner

C、 Air preheater

D、 Economizer

56、【 Single topic selection 】 The main problem during boiler shutdown is to prevent metal leakage on the heating surface （） corrosion .（  C  ）

A、 Under the dirt

B、 low temperature

C、 oxidation

D、 smoke

57、【 Single topic selection 】 Which of the following is not a boiler reliability index ？（）（  A  ）

A、 Boiler safety rate

B、 Continuous operation hours of boiler

C、 Boiler availability

D、 Boiler accident rate

58、【 Single topic selection 】 The training contents of operators shall be in accordance with （） And other safety technical specifications .（  C  ）

A、 National unified compilation of teaching materials ;

B、 Training focus ;

C、 Training and assessment outline for relevant operators formulated by AQSIQ ;

D、 The training and assessment outline for relevant operators formulated by the Provincial Bureau of quality and technical supervision

59、【 Single topic selection 】 In the flow form in the horizontal Museum , Wavy flow in （） after .（  C  ）

A、 Foggy flow

B、 Bubbly flow

C、 Slug flow

D、 Plug flow

60、【 Single topic selection 】 Under the condition of constant boiler evaporation , When the feed water temperature decreases , The superheated steam temperature rises , The reason is （）.（  B  ）

A、 The superheat heat increases

B、 The amount of fuel increases

C、 Heating heat increases

D、 The heating heat is reduced

61、【 Single topic selection 】 Boiler hydrostatic test is generally （） Do it once. .（  D  ）

A、 Every year, ;

B、 Every two years ;

C、 Every three years ;

D、 Every six years

62、【 Single topic selection 】 Based on gas 、 Liquid 、 Mass transfer mechanism of three-phase turbulent mixing between solids , The dust remover that makes the dusty flue gas fully mixed with the absorption liquid and purifies the flue gas is ：（）.（  C  ）

A、 Dry cyclone

B、 Wet Cyclone

C、 Desulfurization and dust removal integrated dust collector

D、 Electrostatic precipitator

63、【 Judgment questions 】 The function of the top flow equalizing orifice in the steam drum is to use the throttling of the orifice , Make the steam space load evenly distributed along the horizontal section of the steam drum , It can reduce the mechanical carrying of steam .（）（  √  ）

64、【 Judgment questions 】 The boiler superheater adopts hierarchical control ： The whole superheater is divided into several stages , Each stage is equipped with a desuperheating device , Control the steam temperature of Superheaters at all levels respectively , Maintain the main steam temperature as the given value .（）（  √  ）

65、【 Judgment questions 】 The steam temperature characteristics of boiler convection superheater are ： When the load increases , The steam temperature decreases .（）（  ×  ）

66、【 Judgment questions 】 Boiler shutdown maintenance is divided into dry method maintenance 、 Wet maintenance .（）（  √  ）

67、【 Judgment questions 】 Boiler is a kind of burning fossil fuel to produce steam （ Or hot water ） Thermal equipment for .（）（  √  ）

68、【 Judgment questions 】 The initial pressure in the boiler is established by evaporating the water evaporated on the heating surface into steam , Volume expansion , Increase the pressure of the boiler system .（）（  √  ）

69、【 Judgment questions 】 Users can directly transform the special equipment they use （  ×  ）

70、【 Judgment questions 】 Steel ball pulverizer is sensitive to impurities in coal , Only certain coals can be burned .（）（  ×  ）

71、【 Judgment questions 】 Among the various losses of the boiler , Maximum heat loss .（）（  ×  ）

72、【 Judgment questions 】 The boiler room must be equipped with indicating liquid 、 Alarm signal of gas fuel leakage .（）（  √  ）

73、【 Judgment questions 】 After the boiler accident , Operators deliberately destroy the accident site , Those who constitute a crime will be investigated for criminal responsibility .（）（  √  ）

74、【 Judgment questions 】 When the hydrostatic test and periodic inspection are in the same year , Just carry out hydrostatic test .（）（  ×  ）

75、【 Judgment questions 】 The thermal efficiency of boiler refers to the percentage of the effective utilization heat of boiler in the output heat of boiler .（）（  ×  ）

76、【 Judgment questions 】 The strength of metal increases with the increase of temperature .（）（  ×  ）

77、【 Judgment questions 】 The more volatile the pulverized coal is, the easier it is to explode .（）（  √  ）

78、【 Judgment questions 】 In natural circulation, the circulation ratio is ： In the riser , Every time 1kg steam , The total amount of water entering the circulating circuit .（）（  √  ）

79、【 Judgment questions 】《 Safety Law of the people's Republic of China on special equipment 》 Regulations , In violation of the provisions of this law , They should bear civil liability for compensation and pay fines 、 Fine , When his property is not enough to pay at the same time , Pay the fine first 、 Fine .（）（  ×  ）

80、【 Judgment questions 】 The influence of noise and vibration on operators and environment can not be considered in the layout of fans and pumps .（）（  ×  ）

81、【 Judgment questions 】 Large capacity utility boilers generally adopt steel tube non boiling economizers .（）（  √  ）

82、【 Judgment questions 】 Due to the low parameters of low-pressure boiler , There is no need to supplement other heating surfaces .（）（  ×  ）

83、【 Judgment questions 】 Because water cannot enter the wall , The heat transfer deterioration from nucleate boiling to film boiling is called the first kind of heat transfer deterioration .（）（  √  ）

84、【 Judgment questions 】 Superheater is a heating surface that heats saturated steam into superheated steam .（）（  √  ）

85、【 Judgment questions 】 Regular inspection of boilers in use , The stoker shall open all manholes on the boiler 、 Handhole 、 Inspection hole , Allow the boiler to be fully cooled and ventilated .（  √  ）

86、【 Judgment questions 】 In the heating system , All condensate produced by indirect steam heating should be recycled , But pay attention to the quality of recycling , Strengthen condensate recovery management .（）（  √  ）

87、【 Judgment questions 】 The main defects of boiler receiver components include ： Crackle 、 Grooving 、 Overheated 、 deformation 、 leak 、 corrosion 、 Wear and scale .（）（  √  ）

88、【 Judgment questions 】 When the pressure bearing parts of the boiler leak , When the leakage is not too serious and the operation can be maintained , Voltage stabilizing measures shall be taken , Maintain the rated parameters , Strengthen operation monitoring , And apply for shutdown .（）（  ×  ）

89、【 Judgment questions 】 Most heating boilers use layer fired boilers .（）（  √  ）

90、【 Judgment questions 】 The effective utilization heat of working medium can be calculated according to the difference between the total enthalpy of working medium and feed water enthalpy .（）（  √  ）

91、【 Judgment questions 】 Two methods of water cycle calculation are differential pressure method 、 Indenter method .（）（  √  ）

92、【 Judgment questions 】 The temperature at which the steam in the flue gas begins to condense is called the dew point , The higher the dew point, the better .（）（  ×  ）

93、【 Judgment questions 】 The amount of fuel should match the amount of air required for combustion , And fully mix and contact the fuel and air , To achieve energy-saving effect .（）（  √  ）

94、【 Judgment questions 】 Economizer is a kind of heat exchange equipment that uses the heat of flue gas at the tail of boiler to heat feed water .（）（  √  ）

95、【 Judgment questions 】 The function of economizer : Reduce the exhaust temperature , Improve boiler efficiency , Save fuel .（）（  √  ）

96、【 Judgment questions 】 The maximum temperature and pressure of countercurrent arrangement , But the working conditions are the worst ; The temperature and pressure of downstream arrangement is the minimum , Consume the most metal .（）（  √  ）

97、【 Judgment questions 】 The safety valve shall be equipped with a discharge pipe , It is not allowed to install valves on the discharge pipe . The drain pipe shall lead directly to a safe place , And have sufficient cross-sectional area and anti freezing measures , Ensure smooth exhaust .（）（  √  ）

98、【 Judgment questions 】 The combustion condition of each boiler passes the aerodynamic field test （ Cold state ） It's final , The purpose is to ensure rapid and stable combustion and uniform distribution of flue gas .（）（  √  ）

99、【 Judgment questions 】 The main thermal characteristic of the furnace is the furnace heat load .（）（  √  ）

100、【 Judgment questions 】 As bubbles increase , The gas content increases , Bubbles polymerize , Form large elastic bubbles , It's called slug flow .（）（  √  ）

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