2022 safety officer-c certificate examination summary and safety officer-c certificate reexamination examination

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

Pass the safety production simulation exam at one point ： Security Officer -C The certificate examination summary is based on the new safety officer -C Certificate examination outline requirements , Pass the safety production simulation test at one point and the safety officer will -C Compile the test questions of the certificate simulation examination , Form a set of safety officers -C Test questions of Zhengquan real simulation test , Students can pass the safety officer -C Certificate reexamination exam full simulation , The safety officer -C Certificate self-test .

1、【 Multiple choice 】 The project schemes with strong professionalism mainly include ： The scaffold 、 Construction electricity 、 Tower crane 、 Material elevator 、 Vertical transportation equipment and equipment ( ) Disassembly and use of .（  ABE  ）

A、 Foundation pit support

B、 Formwork works

C、 Steel Engineering

D、 Concrete engineering

E、 Lifting operation

2、【 Multiple choice 】 Employees of production and business operation entities have the right to know the problems existing in their workplaces and jobs ( ).（  ADE  ）

A、 Risk factors

B、 risk

C、 characteristic

D、 Preventive measures

E、 Accident emergency measures

3、【 Multiple choice 】《 Safe production method 》 The three countermeasures to realize safe production are ( ).（  ACE  ）

A、 Preventive countermeasure system in advance

B、 Safety production responsibility system

C、 Emergency rescue system

D、 Safety evaluation system

E、 After treatment countermeasure system

4、【 Multiple choice 】 Which of the following belong to 《 Safety production evaluation standard for construction enterprises 》 Safety production management system of construction enterprises ？（  ABCE  ）

A、 Safety inspection system

B、 Safety production fund guarantee system

C、 Safety education and training system

D、 Safety demonstration system

E、 Reporting and handling system of production safety accidents

5、【 Multiple choice 】 Before construction in winter, a plan shall be formulated ( ) Etc .（  ABCDE  ）

A、 Non-slip

B、 Antifreeze

C、 Explosion proof

D、 Prevent poisoning

E、 Fire prevention

6、【 Multiple choice 】 The cable route can ( ) laying .（  BC  ）

A、 Along the ground

B、 underground

C、 Overhead

D、 Along the steel support

E、 Along the scaffold

7、【 Multiple choice 】 Which of the following regulations should be met for the upper pole of the edge protective railing ？.（  AE  ）

A、 Height above ground 1.0～1.2m

B、 Height above ground 0.5～0.6m

C、 Bear external forces 3000N

D、 Bear external forces 2000N

E、 Bear external forces 1000N

8、【 Multiple choice 】 What are the necessary safety devices on the tower crane ？（  ABCE  ）

A、 load lifting limiter

B、 Torque limiter

C、 Lifting height limiter

D、 Winch stopper

E、 Amplitude limiter

9、【 Multiple choice 】 The disassembly and assembly of the crane shall be carried out during the day , The operation shall be stopped in case of the following weather ？（  ACD  ）

A、 The wind

B、 Damp

C、 dense fog

D、 Rain and snow

E、 The high temperature

10、【 Multiple choice 】 After the mixing drum or blade of the mixer operates normally , Hopper lifting test , Observe ( ) Whether it is flexible and reliable .（  ABC  ）

A、 clutch

B、 Brakes

C、 Hopper lifting

D、 Electrical system

E、 Charging

11、【 Multiple choice 】 Reinforcement strengthening machinery includes ( ).（  ABC  ）

A、 Steel bar cold drawing machine

B、 Steel bar cold drawing machine

C、 Steel bar twisting machine

D、 Steel bar bending machine

E、 Reinforcing steel cutting machine

12、【 Multiple choice 】 Sequence and method of removal of various forms , It shall be carried out in accordance with the provisions of formwork design . If the formwork design is not specified , Which of the following provisions should be met ？（  AC  ）

A、 Support first and then dismantle , Remove the rear support first

B、 Support first and dismantle first , Rear disassembly of rear support

C、 First remove the non load bearing formwork , Then remove the load-bearing formwork and support

D、 First remove the load-bearing formwork

E、 Then remove the non load bearing formwork and support

13、【 Multiple choice 】 Fire safety responsibility system at construction site , It should be clear ( ) Other requirements , And implement the fire prevention responsibility system level by level .（  BCDE  ）

A、 Fire fighting water

B、 Fire safety management procedure

C、 Person in charge of fire safety

D、 Fire safety training

E、 Fire safety requirements

14、【 Multiple choice 】 The general requirements for the stacking of construction materials on site are ( ).（  ABCDE  ）

A、 According to the dosage 、 Length of use 、 Supply and transportation

B、 Various materials must be placed according to the position specified in the general plan ,

C、 All materials and articles must be stacked neatly , And comply with safety requirements 、 Fire protection requirements

D、 It should be according to the variety 、 Specification stacking , Obvious signs shall be set , Indicate the name 、 specifications 、 Place of origin, etc

E、 There should be drainage measures 、 Meet the requirements of safety and fire prevention

15、【 Multiple choice 】 Safety signs are divided into ( ).（  ABCD  ）

A、 Prohibition sign

B、 Warning Sign

C、 Command flag

D、 Prompt sign

E、 Allow sign

16、【 Multiple choice 】 The construction site shall be provided with a medical care room , Equipped with common drugs and ( ) Wait for first aid equipment .（  ABCDE  ）

A、 Health care medicine box

B、 bandage

C、 stretcher

D、 tourniquet

E、 Neck bracket

17、【 Multiple choice 】 The metal structure foundation components of tower crane include ( ).（  ABCE  ）

A、 chassis

B、 Tower body

C、 Balance arm

D、 windlass

E、 Turntable

18、【 Multiple choice 】 After the casualty accident , The following measures taken by the construction unit , Those are right ？（  ABCD  ）

A、 Actively rescue the wounded

B、 Properly protect important traces on the site

C、 Properly protect the on-site physical evidence

D、 Draw the site sketch and make written records

E、 Formulate accident emergency plan

19、【 Multiple choice 】 The driver of pile driver must pass through ( ), And approved by relevant departments ( ) after , issue ( ). Can ( ). It is strictly prohibited for unlicensed personnel to operate the pile driver .（ Fill in the order ）（  ABCE  ）

A、 Operate alone

B、 Professional training

C、 Assessment approval

D、 High school culture

E、 Certificate of conformity

20、【 Multiple choice 】 The type of pile driver shall be based on ( )、( )、( )、( ) Construction technology and other comprehensive considerations .（  ABCD  ）

A、 Pile length

B、 Pile diameter

C、 Geological conditions

D、 Type of pile

E、 Type of pile

21、【 Multiple choice 】 Summer construction safety education mainly includes ( ) The content such as .（  ABCE  ）

A、 Knowledge of safe electricity use

B、 Knowledge of lightning protection

C、 Collapse prevention safety knowledge

D、 Anti object strike knowledge

E、 Heatstroke prevention and cooling 、 Knowledge of food hygiene and epidemic prevention

22、【 Multiple choice 】《 Regulations on the administration of safe production of construction projects 》 Regulations , Operators enter ( ) front , Should receive safety production education and training . Personnel who have not received education and training or fail to pass the examination of education and training , Do not work .（  CD  ）

A、 Construction unit

B、 The project

C、 New jobs

D、 New construction site

E、 Working environment

23、【 Multiple choice 】 During the trial hoisting of mast sliding method , What phenomena are found , The hoisting shall be stopped immediately or the workpiece shall be reset , Determine the cause and handle it properly , After the safety is confirmed by relevant personnel , Before trial hoisting ( ).（  ABCDE  ）

A、 Ground anchor roof fall 、 Displacement 、

B、 Wire rope jitter

C、 The equipment or machine has abnormal sound 、 deformation 、 Crackle

D、 Mast foundation sinking

E、 Other abnormalities

24、【 Multiple choice 】 Before the construction of the construction project , The technical personnel in charge of project management of the construction unit shall report the technical requirements related to safe construction to ( ) Give a detailed description , And signed by both parties for confirmation .（  CE  ）

A、 Project leader

B、 Safety officer of the construction unit

C、 Operation team

D、 Site safety officer

E、 Operators

25、【 Multiple choice 】 The construction organization design shall be prepared by the construction unit ( ) And other departments .（  ACE  ）

A、 construction technique

B、 Labor and personnel

C、 Security

D、 education

E、 equipment

26、【 Multiple choice 】 Requirements for ground anchors used for hoisting ( ).（  ADE  ）

A、 Make in strict accordance with the design

B、 It can be made at will according to the site conditions

C、 Overload properly when using

D、 Do not overload during use

E、 Make records of concealed works for making ground anchors 1. Ground anchor outlet point in front of ground anchor foundation pit （ That is, the steel wire rope is exposed to the ground after passing through the soil layer ） The pit ahead is deep 2.5 Multiple range and both sides of foundation pit

27、【 Multiple choice 】 according to 《 Regulations on the administration of safe production of construction projects 》 Regulations , For the new structure 、 The new material 、 The construction of new technology and special structure , The design unit shall put forward in the design ( ) Measures and suggestions .（  BD  ）

A、 Ensure the construction progress

B、 Ensure the safety of construction workers

C、 Ensure the quality of the project

D、 Prevent production safety accidents

E、 Guarantee capital investment

28、【 Multiple choice 】 Safety production is to ensure that the production process is carried out in accordance with material conditions and working procedures , Prevent personal injury and death 、 Property damage, etc , Adopted ( ) A series of measures and activities .（  BCDE  ）

A、 Control the destruction of natural disasters

B、 Ensure personal safety and health

C、 Protect the environment from damage

D、 Protection of equipment and facilities from damage

E、 Eliminate or control dangerous and harmful factors

29、【 Single topic selection 】 The switch must be turned off when welding is completed or off duty , Leave enough time to observe , confirm ( ) after , Before leaving .（  C  ）

A、 There are no explosives around

B、 There are no combustibles around

C、 Has been extinguished

D、 No risk of re ignition

30、【 Single topic selection 】 Leakage protector in switch box in humid place , Its rated leakage action current is ( ).（  A  ）

A、15mA

B、20mA

C、30mA

D、40mA

31、【 Single topic selection 】 The pipeline must be installed with completed structure or ( ) For a foothold , It is strictly prohibited to stand and walk on the pipeline under installation .（  D  ）

A、 The scaffold

B、 Templates

C、 Folding ladder

D、 Operating platform

32、【 Single topic selection 】 The scaffold erection plan shall be prepared by ( ) To write ,（  C  ）

A、 scaffolder

B、 Security Officer

C、 On site technical director

33、【 Single topic selection 】 The protective railing must be closed with a safety net from top to bottom , Or set a tightly fixed height under the railing, which is not less than ( ) A toe board or 40cm My foot fence .（  C  ）

A、14cm

B、16cm

C、18cm

D、20cm

34、【 Single topic selection 】 The installation scheme of tower crane shall be determined by ( ) Prepared by .（  D  ）

A、 Construction unit

B、 Property unit

C、 Rental unit

D、 Qualified installation unit

35、【 Single topic selection 】 One must be set at the main node of the scaffold ( ), Fasten with right angle fasteners , And it is strictly prohibited to dismantle .（  D  ）

A、 Longitudinal horizontal bar

B、 Wall pieces

C、 Vertical horizontal bar

D、 Transverse horizontal bar

36、【 Single topic selection 】 A circular saw when the wood is near the end , The operator should ( ).（  B  ）

A、 Start pushing materials

B、 Start pulling materials

C、 Up and down at the same time

D、 Keep your hands still

37、【 Single topic selection 】 The vibrator operator shall master the general knowledge of safe power consumption , Insulating shoes should be worn during operation 、 wear ( ).（  A  ）

A、 Insulating gloves

B、 Canvas gloves

C、 Protective eyepiece

D、 Thread gloves

38、【 Single topic selection 】 The construction methods of building demolition engineering include manual demolition 、 Mechanical demolition 、( ) Three .（  D  ）

A、 Manual demolition

B、 Tool removal

C、 Explosive demolition

D、 Blasting demolition

39、【 Single topic selection 】 The overall formwork shall be lifted horizontally at least ( ) Hanging point .（  C  ）

A、1 individual

B、2 individual

C、4 individual

D、6 individual

40、【 Single topic selection 】 Pile up spoil on the edge , Materials and mobile construction machinery shall be kept at a certain distance from the pit edge , When the soil is good , Stay away from the pit ( ) far .（  B  ）

A、0.5m outside , The height does not exceed 0.5m

B、1m outside , The height does not exceed 1.5m

C、1m outside , The height does not exceed 1m

D、1.5m outside , The height does not exceed 2m

41、【 Single topic selection 】 The following is about the construction site office 、 Description of the site selection of living and other temporary facilities , Which is not true ？.（  A  ）

A、 Unable to meet the requirements of safe distance , Under no circumstances can... Be set .

B、 Isolation from the operation area should be considered , The surrounding environment must be safe , If it cannot be set under the high-voltage line

C、 It shall not be set beside the ditch 、 Cliff side 、 By the river 、 Strong air outlet 、 Under the high wall .

D、 It shall not be set on the landslide 、 Debris flow and other disaster geological zones and areas that may be impacted by mountain torrents .

42、【 Single topic selection 】 The following description of the construction site , What's not right is ( ).（  D  ）

A、 The construction site shall have a good drainage system , Waste water shall not be directly discharged into municipal sewage pipe network and rivers .

B、 Oil stored on site 、 Special warehouse shall be set for chemical solvents , The ground shall be subject to anti leakage treatment .

C、 In order to beautify the environment and prevent dust , Greening should be appropriate in warm season .

D、 The ground should be kept dry and clean .

43、【 Single topic selection 】 The following description about the division of construction site , What's not right is ( ).（  C  ）

A、 Office area at the construction site 、 The living area shall be set separately from the operation area .

B、 The office and living area shall be set outside the falling radius of the building under construction , otherwise , Corresponding measures should be taken .

C、 The living area and operation area shall be clearly divided and isolated , To beautify the site .

D、 The planning and setting of functional areas should also consider traffic 、 Water and electricity 、 Fire and sanitation 、 Environmental protection and other factors .

44、【 Single topic selection 】 According to the relevant provisions of the Ministry of construction , For divisional and subdivisional works with high risk reaching a certain scale, deep foundation pit is involved 、 Underground excavation works 、 Special construction scheme for tall formwork works , The construction unit shall organize ( ) Demonstrate 、 review .（  A  ）

A、 Experts

B、 The supervising engineer

C、 Technical personnel of the construction unit

D、 Professional supervision engineer

45、【 Single topic selection 】 Safety is ( )（  D  ）

A、 No dangerous state

B、 The state of being accident free

C、 Comfortable state

D、 Personnel in the production system shall be protected from unbearable hazards

46、【 Single topic selection 】 In the following options , What does not belong to the rising skylight is ( ).（  D  ）

A、 rectangular

B、 trapezoid

C、M shape

D、 Dot pattern

47、【 Single topic selection 】 About the erection position of crane beam , The crane beam shall be placed on ( ) On .（  C  ）

A、 Ring beam

B、 Top of bent column

C、 The leg of a cow

D、 Foundation beam

48、【 Single topic selection 】 The main function of the connecting beam of bent single-layer workshop is to ensure the safety of the workshop ( ).（  A  ）

A、 Longitudinal stiffness

B、 Lateral stiffness

C、 Vertical stiffness

D、 Horizontal stiffness

49、【 Single topic selection 】 In addition to the load transmitted from the upper column, the lower column of bent column , And bear the burden ( ).（  A  ）

A、 Crane load

B、 Partial wall load

C、 Wind load

D、 Roof load

50、【 Single topic selection 】 Using bent columns and roof trusses （ Roof girder ） Together form a bent , Then through the connection of longitudinal connecting members, the overall structural system of the plant is formed , be called ( ).（  A  ）

A、 Bent structure single storey workshop

B、 Single storey workshop with brick concrete structure

C、 Single storey workshop with rigid frame structure

D、 Single storey industrial plant

51、【 Single topic selection 】 The ability of a component to maintain its original balance is called ( ).（  C  ）

A、 Strength

B、 stiffness

C、 stability

D、 deflection

52、【 Single topic selection 】 The internal force on the cross section of a pure bending beam is ( ).（  C  ）

A、 Axial force

B、 Shear force

C、 Bending moment

D、 Torque

53、【 Single topic selection 】 The length calculation coefficient of slender compression bar hinged at both ends is ( ).（  C  ）

A、0.5

B、0.7

C、1

D、2

54、【 Single topic selection 】 In the following distribution systems , Not belonging to class III distribution refers to ( ).（  D  ）

A、 General distribution box

B、 Distribution box

C、 Switch box

D、 Control buttons

55、【 Single topic selection 】《 Regulations on the administration of safe production of construction projects 》 Regulations ,( ) Be responsible for on-site supervision and inspection of safety production .（  A  ）

A、 Full time safety production management personnel

B、 Project supervision

C、 Technical director of the project

D、 Project leader

56、【 Single topic selection 】( ) take “ Safety first 、 Prevention first ” It is the basic policy of safety production management in China .（  B  ）

A、 labour law

B、 Safe production method

C、 product quality law

D、 The criminal law

57、【 Single topic selection 】 The main occupational hazards exposed to concrete mixers are ( ).（  A  ）

A、 Cement dust

B、 radiation

C、 Yellow mud and dust

D、 noise

58、【 Single topic selection 】 The basis for setting temporary power supply on the construction site is ( ).（  D  ）

A、 Project manager's request

B、 Regulations on the construction site

C、 Requirements of power users

D、 Construction electricity organization design

59、【 Single topic selection 】 The basic power supply and distribution system of the power engineering on the construction site shall be as follows: ( ) Set up .（  C  ）

A、 Class A

B、 second level

C、 Level three

D、 Level Four

60、【 Single topic selection 】 Safety technical measures and required materials and tools for high-altitude operation , Must be included in the project ( ).（  B  ）

A、 budget

B、 Construction organization design

C、 Budget estimate

D、 Safety technical disclosure

61、【 Single topic selection 】《 Regulations on the administration of safe production of construction projects 》 Regulations , The project is subject to general contracting ,( ).（  A  ）

A、 The general contractor shall be responsible for the safety production on the construction site

B、 The Subcontractor is mainly responsible for the safety production on the construction site

C、 The general contractor and subcontractors shall be jointly responsible for the safety production on the construction site

D、 The general contractor and the project supervision unit shall be jointly and severally liable for the safety production of the subcontracted project ;

62、【 Single topic selection 】 according to 《 Regulations on reporting and investigation procedures of major accidents in engineering construction 》 The provisions of the , The construction unit has a major accident , Should be ( ) Write a written report within hours , Report level by level according to the specified procedures and departments .（  C  ）

A、4

B、12

C、24

D、48

63、【 Single topic selection 】《 Regulations on the administration of safe production of construction projects 》 Regulations ,《 Regulations on safety supervision of special equipment 》 Specified construction hoisting machinery , Before acceptance, it shall be subject to inspection and testing institutions with corresponding qualifications ( ) qualified .（  A  ）

A、 Supervision and inspection

B、 Check

C、 testing

D、 test

64、【 Single topic selection 】 It is suitable for extinguishing flammable gases ﹑ Liquid and electrical equipment fires are ( ) Fire extinguishing agent .（  C  ）

A、D Like dry powder

B、ABCD Like dry powder

C、BC Like dry powder

D、 bubble

65、【 Single topic selection 】 General temporary facilities area , Every time 100m2 Equipped with ( ) individual 10L Fire extinguisher .（  A  ）

A、2

B、3

C、4

D、5

66、【 Judgment questions 】 The hook is cracked due to long-term use , It must be welded and repaired before it can be used again .（  ×  ）

67、【 Judgment questions 】 The cast-in-situ horizontal concrete members at the construction site include beams 、 plate ( floor 、 Roof panel ) The formwork supporting structure of ( Support system ) It is an important part of formwork engineering , It is also an important security technology .（  √  ）

68、【 Judgment questions 】《 Construction law 》 Regulations , Construction enterprises shall establish and improve the education and training system of labor safety production , Strengthen the education and training of workers in safe production .（  √  ）

69、【 Judgment questions 】 The prevention and control of light pollution does not belong to the scope of civilized construction management .（  ×  ）

70、【 Judgment questions 】 Emergency rescue plan of the construction unit , Regular training should be included 、 Drill plan and regular inspection system, etc .（  √  ）

71、【 Judgment questions 】 In order to reduce casualties and property losses caused by safety accidents in construction projects , An emergency rescue system for production safety accidents of construction projects must be established .（  √  ）

72、【 Judgment questions 】 The construction unit is setting up protective railings 、 Protective door, etc 、 Portal protection facilities , And when erecting scaffolds for safety protection , In strict accordance with national and industrial standards 、 Set and erect according to the specifications , And conduct acceptance .（  √  ）

73、【 Judgment questions 】 Erection of protective railings , The height of the upper pole from the ground is 1-1.2 rice , The height of the lower rod from the ground is 0.5-0.6 rice .（  √  ）

74、【 Judgment questions 】 Full time safety production management personnel at the construction site , At the same time, you can also do other work .（  ×  ）

75、【 Judgment questions 】 Safety production management organization refers to the construction enterprise and its independent functional department set up in the construction project to be responsible for safety production management .（  √  ）

76、【 Judgment questions 】 Office area at the construction site 、 The living area shall be set separately from the operation area , And keep a safe distance .（  √  ）

77、【 Judgment questions 】 The focus of safety management is the investigation and handling of accidents .（  ×  ）

78、【 Judgment questions 】 Safety production responsibility system refers to the safety responsibility system of managers and operators at all levels of the construction unit .（  ×  ）

79、【 Judgment questions 】 In the course of production , An accident is only a death 、 damage , However, it does not include accidents of property loss or other losses .（  ×  ）

80、【 Judgment questions 】《 Regulations on the administration of safe production of construction projects 》 Regulations , In the process of supervision, the project supervision unit , It is found that there are potential safety accidents and the situation is serious , It shall immediately report to the relevant competent authorities .（  ×  ）

81、【 Judgment questions 】 The driving vertical transportation mainly includes the hoisting of construction materials required for driving by driving shield to the underground , Lift the excavated boxes and other heavy objects underground to the ground .（  √  ）

82、【 Judgment questions 】 After the shield machine is installed , It can be put into use after being accepted and signed by the project manager .（  ×  ）

83、【 Judgment questions 】 In the absence of the relevant signatory of the safety technical data , Others can sign temporarily .（  ×  ）

84、【 Judgment questions 】 Safety technical disclosure shall be carried out before formal operation , And written materials , Go through the signing formalities .（  √  ）

85、【 Judgment questions 】“ Three treasures ” Means a helmet 、 Safety belt and safety rope .（  ×  ）

86、【 Judgment questions 】 Tool type steel scaffold board can be used for bowl buckle steel pipe scaffold .（  √  ）

87、【 Judgment questions 】 Safety inspection is an important way to find dangerous sources , Is to eliminate potential accidents , Prevent accidental injury , An important way to improve working conditions .（  √  ）

88、【 Judgment questions 】 When preparing safety technical disclosure documents, new technologies shall be preferred 、 New measures and other safety technical measures with high degree of intrinsic safety .（  √  ）

89、【 Judgment questions 】 The construction unit is setting up protective railings 、 Protective door 、 When the portal protection facilities and scaffolds are erected , In strict accordance with national and industrial standards 、 Set and erect according to the specifications , And conduct acceptance .（  √  ）

90、【 Judgment questions 】 The enterprise must when the safety belt has reached the specified service life , Randomly selected from each batch 2 Safety belt for inspection , As long as one fails , The whole batch of safety belts must be stopped 、 Scrap .（  √  ）

91、【 Judgment questions 】 Open air operation of building construction 、 Work at height 、 Characteristics of cross operation , There are many unsafe factors on the construction site .（  √  ）

92、【 Judgment questions 】 Under the high-voltage line , Shorter temporary buildings can be erected , However, flammable materials shall not be stacked .（  ×  ）

93、【 Judgment questions 】 The primary terminal of electric welding machine shall be provided with protective cover , The shell of the electric welding machine must have reliable protective neutral connection .（  √  ）

94、【 Judgment questions 】 Vertical holes with falling risk to adjacent people and objects 、 The cave , All shall be provided with cover plate or protection , And there are measures to fix its position .（  √  ）

95、【 Judgment questions 】 When dismantling the scaffold , The wall connecting parts must be removed layer by layer with the scaffold , It is forbidden to dismantle the whole or several layers of wall connecting parts before dismantling the scaffold .（  √  ）

96、【 Judgment questions 】 The wall connecting parts shall be evenly arranged and should be close to the main node , The distance from the main node shall not be greater than 500mm.（  ×  ）

97、【 Judgment questions 】 The longitudinal horizontal bar of scaffold should be lengthened by butt joint , Lap joint can also be used , The lap length shall not be less than 500mm.（  ×  ）

98、【 Judgment questions 】 The low frame material elevator shall be equipped with a safe parking device 、 Broken rope protection device 、 Upper limit stop 、 Lower limit stop 、 Safety protection devices such as cage safety door and signal device .（  √  ）

99、【 Judgment questions 】 Boom type and unattached jack up tower crane , No placards shall be hung on the tower .（  √  ）

100、【 Judgment questions 】 There is no safety net in the elevator shaft , A bamboo plywood can be added every two layers for protection .（  ×  ）

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