Question bank and simulation examination for operation certificate of refrigeration and air conditioning equipment in 2022

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

2022 The refrigeration and air-conditioning equipment operation training test questions are classified into the refrigeration and air-conditioning equipment operation test questions ！2022 The question bank and simulation examination for the operation certificate of refrigeration and air conditioning equipment in are based on the teaching materials for the operation examination of refrigeration and air conditioning equipment . Real questions of refrigeration and air conditioning equipment operation test can be passed through the simulation test at any time according to the point of safety production simulation test .

1、【 Single topic selection 】R134r Refrigerant belongs to freon refrigerant () class .（  C  ）

A、CFC

B、HCFC

C、HFC

2、【 Single topic selection 】 What is not a chemical explosion accident is ( ) The explosion .（  C  ）

A、 Ammonia meets open fire

B、 When welding the refrigeration system

C、 When using inert gas for pressure test

3、【 Single topic selection 】 The workplace of the employer with occupational disease hazards ( ).（  A  ）

A、 There shall be facilities suitable for the prevention of occupational hazards

B、 There is no need to set up a dressing room 、 Wash the bathroom

C、 It can be mixed with harmless operation

4、【 Single topic selection 】 In the refrigeration cycle , Inspiratory pressure refers to ( ) import .（  C  ）

A、 evaporator

B、 Condenser

C、 compressor

5、【 Single topic selection 】 The expansion valve, one of the four major components of the refrigeration system, is generally installed in ( ).（  B  ）

A、 Between compressor and evaporator

B、 Between evaporator and condenser

C、 Between condenser and compressor

6、【 Single topic selection 】 Chemical frostbite is generally divided into three degrees , The level of chemical frostbite that damages the whole skin is ( ) degree .（  C  ）

A、 One

B、 Two

C、 3、 ... and

7、【 Single topic selection 】 Chemical frostbite is generally divided into three degrees , The level of chemical frostbite that damages the epidermis is ( ) degree .（  A  ）

A、 One

B、 Two

C、 3、 ... and

8、【 Single topic selection 】 In the refrigeration system , The following are safe settings ().（  A  ）

A、 Safety valve

B、 filter

C、 Emergency ammonia relief device

9、【 Single topic selection 】 In lithium bromide absorption refrigeration unit , In order to prevent crystallization when the solution temperature decreases during operation , The mass concentration of lithium bromide should not exceed ( ).（  B  ）

A、50%

B、66%

C、75%

10、【 Single topic selection 】 In the air conditioner , Due to the increased pressure, there is less , Therefore, the centrifugal refrigeration compressor used is generally ( ).（  A  ）

A、 Single stage

B、 Two stage

C、 Three stage

11、【 Single topic selection 】 Traction driven elevator is a kind of relying on （） Driven elevator .（  B  ）

A、 Non friction

B、 The frictional force

C、 gravity

D、 Other

12、【 Single topic selection 】 Small refrigeration systems are prone to blockage at the capillary , It can be judged that the phenomenon of dirty blockage is ( ).（  A  ）

A、 The frosting position starts from the dirty blockage of the capillary

B、 The frosting position starts from the capillary outlet

C、 The capillary tube is frosted as a whole

13、【 Single topic selection 】 When the construction depth of foundation pit reaches ( )m To the extent of , It has posed a danger to the pit side operation , Edge protection facilities shall be set up according to the regulations of high-altitude operation and edge operation .（  C  ）

A、1.2

B、1.8

C、2

14、【 Single topic selection 】 The installation requirements of temperature controller in ammonia refrigeration system are ( ).（  B  ）

A、 Horizontal installation

B、 Vertical mounting

C、 It depends on the site conditions

15、【 Single topic selection 】 Ammonia absorption refrigeration system , If the cooling level goes through the absorber and condenser , Then the temperature relationship between them is ( ).（  C  ）

A、 High absorber temperature

B、 High condenser temperature

C、 Approximately equal

16、【 Single topic selection 】 Ammonia leakage , People can be poisoned in half an hour with a volume content of ( ).（  B  ）

A、0.6%-0.7%

B、0.5%-0.6%

C、0.7%-0.8%

17、【 Single topic selection 】 When the charge is jammed , If before the detonator and the primary explosive package are put in , You can use ( ).（  A  ）

A、 Non metallic long rod treatment

B、 Handle with a long metal rod

C、 Poke the medicine with a steel drill

18、【 Single topic selection 】 The main functions of oak bowl tannin extract as a water treatment agent in the pot are ( ).（  A  ）

A、 Complex with hard substances , Prevent scaling

B、 Increase the alkalinity of pot water

C、 Destroy the metal surface facial mask

D、 Improve PH value

19、【 Single topic selection 】 Lithium bromide absorption refrigerator at ambient temperature of 0℃ Below or when parking for a long time , After stopping the steam supply , Should be ( ).（  A  ）

A、 Open the refrigerant water regeneration valve

B、 Close the refrigerant water regeneration valve

C、 Cut off the power supply

20、【 Single topic selection 】 In underground mines , Keep the water from the upper level to the lower level , And then discharge to the ground , be called ( ).（  C  ）

A、 Direct drainage system

B、 Zoned drainage system

C、 Centralized drainage system

21、【 Single topic selection 】 Press 《 Regulations on safety supervision of special equipment 》 Regulations , Causing direct economic loss 1000 Accidents below 10000 yuan belong to ().（  A  ）

A、 General accidents

B、 Major accident

C、 Major accident

D、 Extraordinarily serious accident

22、【 Single topic selection 】 Spheroidization is mainly through ( ) Judge .（  B  ）

A、 Hardness test

B、 Metallographic analysis

C、 Chemical analysis

D、 Pressure test

23、【 Single topic selection 】 The energy consumption per unit output is equal to the total consumption of certain energy and the total output of the product （ Or net output value ） Divide by .（  A  ）

A、 yes

B、 no

24、【 Single topic selection 】 Of lithium bromide solution in lithium bromide absorption refrigerator unit PH The value should be adjusted to the normal range of ( ).（  B  ）

A、7.5 following

B、9.5-10.5

C、10.5 above

25、【 Single topic selection 】 mine 、 Dangerous goods and other high-risk enterprises should conduct at least ( ) Hours of safety training , At least every year 20 Class hour retraining .（  C  ）

A、120

B、100

C、72

26、【 Single topic selection 】 Total mine air volume of mine ventilation system 、 Mine effective air volume 、 Mine effective air volume rate 、 Air volume of the turbine station 、 The wind pressure of the turbine station shall be controlled every ( ) Measure once , In case of major changes in mine production or ventilation system, it shall also be measured .（  A  ）

A、 year

B、 quarter

C、 month

27、【 Single topic selection 】 Pay attention to when repairing the equipment ( ).（  C  ）

A、 Do not clean the site

B、 Oil or metal chips left in the machine

C、 Check that there are no metal chips left in the machine

28、【 Single topic selection 】 The automatic energy regulation of screw compressor is through ( ) Realized .（  A  ）

A、 Four way solenoid valve

B、 Oil distribution valve

C、 thermostat

29、【 Single topic selection 】 The function of large backwash of ion exchanger is ( ).（  B  ）

A、

30、【 Single topic selection 】 Refrigerant carrier pH The value should be kept at 7.5~8, When the acid is too strong , coca ( ) neutralization .（  C  ）

A、 water

B、 sodium chloride

C、 Caustic soda

31、【 Single topic selection 】 along with " Safe production Mock test Try a little " With the increase of temperature and pressure , The density of steam ( ), The density of water ( )（  B  ）

A、 increase

B、 Reduce

C、 unchanged

D、 identical

32、【 Single topic selection 】 The voltage transformer is actually a ( ) transformer .（  A  ）

A、 step-down

B、 Downflow

C、 boost

33、【 Multiple choice 】《 Safety Law of the people's Republic of China on special equipment 》 Regulations , Production of special equipment 、 business 、 The user shall equip special equipment in accordance with the relevant provisions of the state ( ), And carry out necessary safety education and skill training .（  ABD  ）

A、 Safety management personnel

B、 Testing personnel

C、 Inspector

D、 Operators

E、 Marketer

34、【 Single topic selection 】《 Special equipment safety law 》 Regulations , When the Department in charge of safety supervision and management of special equipment carries out safety supervision and inspection , Ought to have （） The above special equipment safety supervisors shall participate in , And show valid administrative law enforcement certificate for safety of special equipment .（  C  ）

A、 a

B、 Three place

C、 Two

35、【 Single topic selection 】 Service buildings shall be located... Away from the warehouse ( )m Somewhere else .（  B  ）

A、100

B、200

C、300

36、【 Multiple choice 】 The following requirements for pressure pipeline operators are ( ).（  ABCD  ）

A、 Over age 18 One year old ,60 Under one year old

B、 A healthy body , Be competent for the job

C、 Familiar with the operation process 、 Process unit

D、 Have a certain degree

37、【 Single topic selection 】 Daily maintenance of in-service vehicles , barring ____.（  D  ）

A、 Main stressed structural members

B、 Safety protection device

C、 Working organization

D、 Vehicle operating performance

38、【 Multiple choice 】《 Management rules for the use of special equipment 》 Regulations , The special equipment is to be stopped 1 More than years , The user shall （）.（  ABCD  ）

A、 Take effective protective measures

B、 Set the disable flag ;

C、 After deactivation 30 Fill in... Within days 《 Registration form for cancellation of shutdown, scrap and cancellation of special equipment 》 Inform the registration authority ;

D、 When re enabled , Self inspection should be carried out , Go through the opening procedures at the use registration authority ; Beyond the validity period of regular inspection , The inspection shall be carried out in accordance with the relevant requirements of regular inspection .

39、【 Single topic selection 】 When any part of the step or pedal breaks and sinks , The electrical device that stops the escalator or moving sidewalk is （）.（  D  ）

A、 Reversal protection

B、 Overspeed protection

C、 Additional brakes

D、 step 、 Pedal collapse protection device

40、【 Single topic selection 】 The air entering the mine , It should not be polluted by harmful substances , Distance between air outlet shaft and air inlet shaft of radioactive mine , Should be greater than ( )m.（  C  ）

A、100

B、200

C、300

41、【 Multiple choice 】《 Safety Law of the people's Republic of China on special equipment 》 Regulations , Production of special equipment （ Design 、 manufacture 、 install 、 reform 、 repair ）、（） And special equipment safety supervision and management , This Law shall apply .（  ACDE  ）

A、 business

B、 transport

C、 Use

D、 test

E、 testing

42、【 Single topic selection 】 The carbon dioxide cylinder uses ( ) Bottle cap .（  B  ）

A、 Fixed type

B、 Detachable

C、 Welded

43、【 Multiple choice 】《 Safety Law of the people's Republic of China on special equipment 》 Regulations , The use of special equipment fails to go through the use registration in accordance with the regulations , Order to make corrections within a time limit ; Failing to correct within the time limit , Order to stop using relevant special equipment , It's about ( ) above ( ) The following fines .（  AC  ）

A、1 Ten thousand yuan

B、2 Ten thousand yuan

C、10 Ten thousand yuan

44、【 Multiple choice 】 Boiler water treatment includes ( ).（  ABC  ）

A、 Chemical treatment outside the pot

B、 Add medicine in the pot

C、 Return water treatment

45、【 Multiple choice 】 According to the working characteristics of quick opening pressure vessel , It is judged that under the following circumstances, it is easy to cause personal injury and death accidents of fast opening pressure vessels ().（  CDE  ）

A、 The vessel operates under the maximum working pressure for a long time

B、 The vessel operates under high temperature for a long time

C、 The container end cap is often opened

D、 Pressure rise when the end cover of the container is not fully closed

E、 Open the end cap of the container before unloading

46、【 Single topic selection 】 The inspection items of regular inspection of special equipment are based on ( ) determine .（  D  ）

A、 Opinions of the inspection agency

B、 Comments of the user

C、 Inspection cost

D、 Relevant regulations 、 The requirements of the rules

47、【 Multiple choice 】 Users of high energy consuming special equipment shall ：（）.（  ABCD  ）

A、 Establish and improve economic operation

B、 Energy efficiency measurement, monitoring and statistics

C、 Energy efficiency assessment and other energy-saving management systems

D、 Post responsibility system

48、【 Judgment questions 】R134a The thermodynamic properties of R12 Very close to , In the use of R12 In the refrigeration unit of , You can use R134a replace R12 Without making any changes to the equipment .（  ×  ）

49、【 Judgment questions 】 Before filling, the loader shall check whether the electrostatic grounding wire of the filling weighing instrument is in good condition , Turn on the ventilation of the filling room .（  √  ）

50、【 Judgment questions 】R404A and R410A Mainly used for substitution R22 and R502, The compressed liquefied gas is stored in the steel cylinder .（  √  ）

51、【 Judgment questions 】 It is forbidden to replace the pressure vessel containing flammable media with air .（  √  ）

52、【 Judgment questions 】《 Refrigerant oil 》(GB/T16630-2012) The dielectric strength of lubricating oil shall not be less than 25kv, And have strict . Safety production simulation Examination Give it a try spot through . Acid of 、 Index of base number .（  √  ）

53、【 Judgment questions 】 When heating liquid with beaker , The height of the liquid must not exceed three quarters of the beaker .（  ×  ）

54、【 Judgment questions 】 The condenser is a heat exchanger that transfers the heat absorbed by the refrigerant in the refrigeration system to the surrounding medium .（  √  ）

55、【 Judgment questions 】 The condenser of the chiller needs to be cleaned regularly .（  √  ）

56、【 Judgment questions 】 In order to free the person who gets an electric shock from the conductor , It is best to use both hands .（  ×  ）

57、【 Judgment questions 】 Change the position of the flame center , It can change the radiant heat absorption in the furnace and the flue gas temperature entering the superheater , Therefore, the superheated steam temperature and reheated steam temperature can be adjusted .（  √  ）

58、【 Judgment questions 】 Strengthening the construction of professional ethics is an important content for enterprises to develop advanced culture .（  √  ）

59、【 Judgment questions 】 Horizontal shell and tube condenser , The refrigerant flows outside the pipe , The cooling water flows in the pipe .（  √  ）

60、【 Judgment questions 】 The heat load of the absorber in the absorption refrigeration unit is less than that of the condenser .（  ×  ）

61、【 Judgment questions 】 First aid for electric shock , First of all, make the person who gets an electric shock quickly get out of the power supply , The sooner the better .（  √  ）

62、【 Judgment questions 】 Flammable gas must be mixed with air to reach the explosion limit , There will be an explosion （  ×  ）

63、【 Judgment questions 】 Surge is an inherent disadvantage of centrifugal refrigeration compressor .（  √  ）

64、【 Judgment questions 】 Forklift can improve its bearing capacity by increasing counterweight and other means .（  √  ）

65、【 Judgment questions 】 The main person in charge of the unit responsible for the accident failed to perform his duties according to law , Causing major accidents , Of annual income 60% The fine .（  √  ）

66、【 Judgment questions 】 In refrigeration equipment ,、 Safety production simulation test try A little 、 The heat absorbed by the evaporator is equal to the heat released by the condenser .（  ×  ）

67、【 Judgment questions 】 The setting of emergency shelter facilities shall meet the disaster avoidance needs of the maximum number of operators in the middle section at the same time , The rated number of people in a single disaster avoidance chamber shall not be greater than 100 people .（  √  ）

68、【 Judgment questions 】2014 year 1 month 1 Effective as of 《 Safety Law of the people's Republic of China on special equipment 》 The special equipment mentioned in refers to the special equipment involving life safety 、 Boiler with high risk 、 Pressure vessel （ Including gas cylinders ）、 Penstock 、 The elevator 、 Hoisting machinery 、 Passenger ropeways and large amusement facilities are seven types of equipment .（  ×  ）

69、【 Judgment questions 】 The manufacturing cost of lead-acid battery is low , Small internal resistance , High current , Widely used in vehicles .（  √  ）

70、【 Judgment questions 】 Water lithium bromide absorption refrigeration system , Lithium bromide concentrated solution absorbent .（  √  ）

71、【 Judgment questions 】 In petrochemical industry, propylene is used as centrifugal refrigeration compressor 、 Ethylene as refrigerant , Ammonia is used as refrigerant only in centrifugal compressors with large refrigerating capacity .（  √  ）

72、【 Judgment questions 】 After cavitation occurs in the shield pump , The flow and discharge pressure of the pump drop , It will lead to the deterioration of absorber and evaporator spray , Cooling capacity is reduced .（  √  ）

73、【 Judgment questions 】 There are two kinds of indirect fire sources causing fire: heating natural fire and self ignition .（  √  ）

74、【 Judgment questions 】 Place the acetylene cylinder after filling 4 It can be used in hours （  ×  ）

75、【 Judgment questions 】 During ammonia charging test of ammonia refrigeration system , Liquid ammonia can be injected directly into the system , To speed up the process of ammonia filling test .（  ×  ）

76、【 Judgment questions 】 When leakage is found in the vacuum pumping stage of ammonia refrigeration system , Repair welding shall be carried out in time , And conduct vacuum pumping test again .（  ×  ）

77、【 Judgment questions 】 When installing ammonia refrigeration system , Evaporation discharge pipe 180° An elbow can make “ Safety production simulation exam One Diantong “ With two 90° Welding substitution of pressed elbow .（  ×  ）

78、【 Judgment questions 】 When forklift forks to carry articles , The space between two forks shall be adjusted as required , Balance the two forks , No deflection , One side of the cut goods shall be close to the shelf .（  √  ）

79、【 Judgment questions 】 The thermal sensitivity of explosives is usually expressed in terms of temperature .（  ×  ）

80、【 Judgment questions 】 The valve shall be arranged in an easily accessible position , A place convenient for operation and maintenance .（  √  ）

81、【 Judgment questions 】《 Safety Law of the people's Republic of China on special equipment 》 Regulations , The Department responsible for the safety supervision and administration of special equipment shall strengthen the publicity and education on the quality of special equipment , Popularize the quality knowledge of special equipment , Enhance the public's awareness of the quality of special equipment .（  ×  ）

82、【 Judgment questions 】 Valves installed in rows in ammonia refrigeration system , The center of the valve handwheel shall be in the same straight line .（  √  ）

83、【 Judgment questions 】 Particularly serious accidents refer to direct economic losses 2000 Equipment accidents of more than 10000 yuan .（  √  ）

84、【 Judgment questions 】 The impulse pipe of ammonia pressure gauge can be connected to the pipeline for other purposes according to the actual situation .（  ×  ）

85、【 Judgment questions 】《 Management rules for the use of special equipment 》 Regulations , China implements the use registration management system for mobile pressure vessels .（  √  ）

86、【 Judgment questions 】 Ammonia absorption refrigeration system is divided into high pressure side and low pressure side , Both evaporator and absorber belong to low pressure side .（  √  ）

87、【 Judgment questions 】 Act vertically on the surface of an object ” Safety production simulation Exam one Diantong ” The force on the surface is called pressure .（  √  ）

88、【 Judgment questions 】 Ammonia has good water absorption , But at low temperature, the water will precipitate from the ammonia solution and freeze , So... Will occur in the system “ Ice jam ” The phenomenon .（  ×  ）

89、【 Judgment questions 】 If the intestines of the injured person protrude from the wound , It can be delivered directly into the abdominal cavity , Then cover it with a clean basin and wrap it up .（  ×  ）

90、【 Judgment questions 】 The scroll stator and rotor of scroll compressor are installed , The phase difference is 180°.（  √  ）

91、【 Judgment questions 】 The solution concentration in the low-pressure generator in the lithium bromide absorption unit is too high , It indicates that the liquid level in the generator is too high .（  ×  ）

92、【 Judgment questions 】 Spring type safety valve is the most commonly used safety valve .（）（  √  ）

93、【 Judgment questions 】 The concentration is outside the explosion range , Combustibles will not explode .（  √  ）

94、【 Judgment questions 】 New operator of cryogenic liquid storage tank , Without examination , No operation certificate for special equipment operators , When people are nervous , Occasionally, it can operate independently .（  ×  ）

95、【 Judgment questions 】 Personnel who take the examination for special equipment operators , A copy of the graduation certificate or academic certificate shall be submitted to the examination institution 1 Share .（  √  ）

96、【 Judgment questions 】 Before the lithium bromide absorption unit is shut down for a long time and restarted, the air extraction device shall be started to remove the nitrogen in the unit , After the solution and refrigerant water are added to the unit , Also carry out air extraction operation .（  √  ）

97、【 Judgment questions 】 Due to the busy task, the employer can arrange the workers to engage in the operation exposed to occupational disease hazards first , Pre job occupational health examination shall be carried out after leisure .（  ×  ）

98、【 Judgment questions 】 Because ammonia is miscible with water , Therefore, it is not necessary to control the water content in ammonia .（  ×  ）

99、【 Judgment questions 】 Oscilloscope is a common electrical instrument , Can't be used to measure frequency .（  ×  ）

100、【 Judgment questions 】 Professional ethics has nothing to do with professional skills .（  ×  ）

Support the test questions of the operation test of precision refrigeration and air conditioning equipment in all regions of the country , Support safety certificate , Special operation certificate , Exercises on the question bank of vocational skill appraisal and other types of work .