Examination question bank and online simulation examination of the third batch (main person in charge) of special operation certificate of safety officer a certificate in Guangdong Province in 2022

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

2022 Guangdong Provincial Safety Officer A The third batch of certificates （ Principal Responsible Person ） The recurrent training question bank is the safety officer of Guangdong Province A The third batch of certificates （ Principal Responsible Person ） All test question bank theoretical knowledge test question bank ！2022 Guangdong Provincial Safety Officer A The third batch of certificates （ Principal Responsible Person ） The examination question bank and online simulation examination of special operation certificate are based on the safety officer of Guangdong Province A The third batch of certificates （ Principal Responsible Person ） The latest textbook compilation . Guangdong Provincial Safety Officer A The third batch of certificates （ Principal Responsible Person ） Review the simulation test, pass the safety production simulation test and pass the exercises in the previous chapter .

1、【 Multiple choice 】 The methods of well point dewatering are （）.（  ABCDE  ）

A、 Light well point dewatering

B、 Jet well point dewatering

C、 Electroosmosis well point precipitation

D、 Tube well point dewatering

E、 Deep well point dewatering

2、【 Multiple choice 】 The enterprise has obtained the safety production license , The following conditions for safe production shall be met （）.（  ABCD  ）

A、 establish 、 Improve the safety production responsibility system , Formulate complete safety production rules and regulations and operating procedures

B、 The main person in charge and safety production management personnel have passed the examination

C、 Carry out safety evaluation according to law

D、 Set up safety production management organization , Provide full-time safety production management personnel

E、 There can be no major hazard detection 、 assessment 、 Monitoring measures and emergency plans

3、【 Multiple choice 】 Before new workers are assigned to the construction team , Preliminary safety education must be carried out , The following contents of company level safety education are （）.（  ABC  ）

A、 General education on the significance and tasks of labor protection

B、 Safety production policy 、 policy 、 statute 、 Standards and safety knowledge

C、 Enterprise safety rules and regulations

D、 Safety production discipline and civilized production requirements

E、 Safety operation regulations for this type of work

4、【 Multiple choice 】 After the mechanical equipment enters the construction site , The project leader shall organize （） Check and accept .（  ABCDE  ）

A、 Project technical director

B、 Machinery management personnel

C、 Full time safety management personnel

D、 Relevant personnel of the user

E、 Relevant personnel of the leasing unit

5、【 Multiple choice 】 Shield machine is the main machine for excavating soil, sand and surrounding rock , from （） Three parts , These three parts are collectively called shield shell .（  ACE  ）

A、 Notch ring

B、 Shield shell

C、 Support ring

D、 Shield Jack

E、 Shield tail

6、【 Single topic selection 】2014 In, an owner demolished a large theater building , Contract to Zhao's anti-corrosion and thermal insulation service company without demolition qualification , Because we don't know the danger of demolition , The operator decided to dismantle the concrete beam first , Then remove the concrete slab , In operation , No safety personnel were present at the scene , No safety measures . When the beam is disassembled to half, all the floors collapse , Many people died . After the inspection, it is verified that there is no scheme for the construction method , The company also has no construction scheme management system . Please answer the questions ：
（2） There shall be a special construction scheme for the demolition project and there shall be （） on-the-spot supervision .（  A  ）

A、 Full time safety production management personnel

B、 Construction worker

C、 Technical director

D、 Team leader

7、【 Single topic selection 】2016 year 2 month 8 Japan , Cooperation unit Li et al 4 People are 1 Dock No （ Cofferdam foundation pit -9.5m） Clean and transport the cement and soil mixed block after rotary spraying （ Hereinafter referred to as block ）, Due to hoisting, the excavated block may encounter the second 2-4 Steel longitudinal 、 Diagonal bracing , Li went to the first concrete support to check the situation , So that the block can be transported . When Li crosses over the first concrete support, it has been set in the longitudinal direction 12 Behind the protective railing on the concrete support of No. 1 bent , Come to the longitudinal without protective railing 12 No. 1 bent concrete support and concrete inclined support （ The width is 60cm） confluence , Suddenly fall while looking down , Not wearing a seat belt , Fall into the foundation pit -9.5m On the soil , The falling height is 13.5m, Send to the local health center immediately , Dead after rescue . Please answer the questions ：
（4） The main person in charge of the unit responsible for the accident failed to perform his duties according to law or was responsible for leadership , Annual income of the Department in the previous year （） The fine .（  C  ）

A、 Sixty percent

B、 Forty percent

C、 Thirty percent

D、 twenty percent

8、【 Single topic selection 】《 Regulations of Guangdong Province on work safety 》 Regulations , The production and business operation unit is the main body responsible for safe production , Its （） Be fully responsible for the safety production work of the unit .（  D  ）

A、 Project leader

B、 Safety technicians

C、 shareholders

D、 Principal Responsible Person

9、【 Single topic selection 】 The demonstration conclusion of the special construction scheme is （） Of , After modification, the construction unit shall re organize expert argumentation in accordance with the requirements of this regulation .（  C  ）

A、 Basically meet the requirements

B、 After modification, it passed

C、 Not through

D、 Not meeting the requirements

10、【 Single topic selection 】 Lighting lamps used in warehouses or stacking places shall be kept at least... Away from flammable stacks （） distance .（  B  ）

A、0.5m

B、1m

C、1.5m

D、2m

11、【 Single topic selection 】 Welding site using AC welder （）m Within the scope of , There must be no flammable 、 Explosives .（  C  ）

A、5

B、8

C、10

D、15

12、【 Single topic selection 】 The following () The resistance of resistance value is suitable for single arm bridge measurement .（  B  ）

A、0.1Ω

B、100Ω

C、500KΩ

D、1MΩ

13、【 Single topic selection 】 The generation of eddy current is which of the following phenomena ( ).（  C  ）

A、 Self feeling

B、 Current heating effect

C、 mutual inductance

D、 Conductor cutting magnetic lines of force

14、【 Single topic selection 】 The following advantages that do not belong to electric drive are ().（  D  ）

A、 The transmission of electric energy is simple and economical, and the distribution is convenient

B、 Convenient for automatic control 、 And the action speed is fast

C、 Good starting performance 、 Braking and speed regulation performance

D、 The electric drive system has high efficiency , Not easy to connect

15、【 Single topic selection 】 The correct description of the input signal of the differential amplification circuit is ( ).（  D  ）

A、 Common mode signals are useful signals

B、 Differential mode signal is the signal to be suppressed

C、 Both differential mode signals and common mode signals are useful signals

D、 Differential mode signals are useful signals , Common mode signal is the signal to be suppressed

16、【 Single topic selection 】 The diagonal bridging rod shall be fixed on the extended end or vertical rod of the transverse horizontal rod intersected with it with rotating fasteners , The distance from the center line of the rotating fastener to the main node should not be （）.（  A  ）

A、 Greater than 150mm

B、 Less than 150mm

C、 Greater than 300mm

D、 Less than 300mm

17、【 Single topic selection 】 Before the implementation of the special scheme for divisional and subdivisional works with high risk , Staffing or （） Safety technical disclosure shall be made to site management personnel and operators .（  C  ）

A、 Construction worker

B、 Security Officer

C、 Project technical director

D、 Project leader

18、【 Single topic selection 】 Due to the of low carbon steel () Wider , It is easy to obtain the required plastic deformation during spot welding without using a large electrode pressure .（  A  ）

A、 Plastic temperature zone

B、 Crystallization temperature zone

C、 Strain temperature zone

D、 Recrystallization temperature zone

19、【 Single topic selection 】 Logistics management belongs to workshop management ().（  B  ）

A、 Production planning management

B、 Production site management

C、 Job management

D、 Field equipment management

20、【 Single topic selection 】FR-A700 The series is Mitsubishi ( ) Frequency converter .（  A  ）

A、 Multi function and high performance

B、 Economical high performance

C、 Special type for water pump and fan

D、 Energy saving load

21、【 Single topic selection 】 When excavating a large-area foundation pit in the water rich soil layer below the groundwater level , Use the general （） Method , We often encounter a large amount of groundwater gushing out , Difficult to drain .（  B  ）

A、 Well point dewatering

B、 Open ditch drainage

C、 Tube well point dewatering

D、 Lower the water level manually

22、【 Single topic selection 】 The stay wire of the corner rod is located at the end of the corner bisector () On .（  B  ）

A、 Parallel lines

B、 Vertical line

C、30° Line

D、60° Line

23、【 Single topic selection 】 The excavation depth of foundation pit exceeds （） when , Two protective railings must be set at the edge , Add red signs at night .（  A  ）

A、1.5m

B、2.0m

C、2.2m

D、2.5m

24、【 Single topic selection 】 When the construction enterprise prepares the construction organization design , Shall, according to （） Formulate corresponding safety technical measures .（  A  ）

A、 Characteristics of Construction Engineering

B、 The requirements of the construction unit

C、 Characteristics of the unit

D、 Requirements of the competent authority

25、【 Single topic selection 】 Before scribing , The surface of cast iron and forging blank shall be coated with ().（  A  ）

A、 Lime water

B、 Copper sulfate solution

C、 Blue oil

D、 Sodium carbonate solution

26、【 Single topic selection 】 The model of copper core PVC insulated parallel flexible wire is ().（  B  ）

A、RV

B、RVB

C、RVV

D、RVVB

27、【 Single topic selection 】 The main magnetic field of DC motor refers to ( ) The resulting magnetic field .（  A  ）

A、 Main magnetic pole

B、 Armature current

C、 Commutator pole

D、 None of the above is true

28、【 Single topic selection 】 Current quick break voltage lockout protection is () logical circuit .（  C  ）

A、 Or gate

B、 Not gate

C、 And gate

D、 Composite door

29、【 Single topic selection 】 When someone burns , The burn wound should be covered and wrapped with clean gauze or quilt for simple dressing , avoid （）.（  C  ）

A、 The body catches a cold

B、 Expand the impact

C、 Wound contamination

D、 Aggravate the pain of the injured

30、【 Single topic selection 】 The assessment and evaluation of the dynamic management behavior of safe production and civilized construction of construction enterprises should meet which of the following options （）.（  A  ）

A、 Enterprise qualification is due to safe production 、 Civilized construction is degraded , Then this item shall not be scored

B、 No safety inspection instrument has been established 、 Of instrument and tool allocation system , Then this item shall not be scored

C、 The annual excellent rate of safety and quality standardization is lower than the national or local regulations , The reduction score shall be evaluated on a case by case basis

D、 Subcontracting , The general contractor fails to formulate and supervise the implementation of the management system for the qualification of subcontractors and personnel , Then this item shall not be scored

31、【 Single topic selection 】 Check the oil level before installing the voltage transformer , How high is the oil level from the oil tank cover ( ).（  C  ）

A、1～3mm

B、5～10mm

C、10～15mm

D、20～30mm

32、【 Single topic selection 】 Servo motor has high control accuracy 、 Strong overload capacity 、 High starting torque 、 Fast dynamic response 、 Wide speed range 、 High linearity of mechanical characteristics and speed regulation characteristics 、（） Other characteristics .（  B  ）

A、 Efficient

B、 No rotation

C、 The price is low

D、 Large capacity

33、【 Single topic selection 】 Measure the tangent of dielectric loss angle of transformer , use ().（  D  ）

A、 Voltage drop method

B、 Shielding method

C、 DC bridge method

D、QSI AC bridge method

34、【 Single topic selection 】 DC single arm bridge is used to measure the median resistance , The measured resistance of DC double arm bridge is （）Ω following .（  A  ）

A、10

B、1

C、20

D、30

35、【 Single topic selection 】 In the safety production evaluation method of construction enterprises , The evaluation and evidence collection shall be carried out within the specified time limit , The safety production situation of the construction enterprise shall be based on the self-evaluation · Ann Full production simulation test Try a little · Before the month （） The situation since .（  B  ）

A、10 Months

B、12 Months

C、18 Months

D、24 Months

36、【 Single topic selection 】 A construction site , Weld an expansion water tank . The welder finished 4/5 The workload after work , The person in charge of the construction site also arranged painters to paint the welded parts with antirust paint . Due to poor ventilation , The next day the paint was wet . After the welder goes to work , Continue welding without taking corresponding measures , Cause the volatile gas of paint in the water tank to explode and burn , The welder was burned . Please answer the questions ：
（4） Painting and welding on the construction site can be carried out at the same time .（）（  B  ）

A、 correct

B、 error

37、【 Single topic selection 】 A construction company in the monthly safety inspection , Find out 3# There are the following problems in the erection of site scaffold ：① exceed 24m There is no erection scheme for high scaffold , No approval procedures ;② The segmental integral lifting scaffold adopted has not been reviewed and approved ;③ Some scaffolds used have different specifications of steel pipe materials ;④ There are many irregularities in the foundation of the scaffold , Very few vertical poles are suspended and so on . Please answer the questions ：
（2） In order to avoid causing scaffold collapse accident and injury to operators during construction , The scaffold on the construction site shall be stopped immediately .（）（  A  ）

A、 correct

B、 error

38、【 Single topic selection 】 A construction company in the monthly safety inspection , Find out 3# There are the following problems in the erection of site scaffold ：① exceed 24m There is no erection scheme for high scaffold , No approval procedures ;② The segmental integral lifting scaffold adopted has not been reviewed and approved ;③ Some scaffolds used have different specifications of steel pipe materials ;④ There are many irregularities in the foundation of the scaffold , Very few vertical poles are suspended and so on . Please answer the questions ：
（4） Found in the above safety inspection “ Very few pole suspension problems ” It belongs to the allowable situation in scaffold erection .（）（  B  ）

A、 correct

B、 error

39、【 Single topic selection 】 Weld auxiliary symbol “—” Is the weld () Symbol .（  C  ）

A、 concave

B、 Flush

C、 Plane

D、 Convex surface

40、【 Single topic selection 】 A construction enterprise due to the company's poor benefits , The leaders of the company decided to carry out reform , After study, it is decided to cancel the safety department of the company on the construction site , All safety management personnel are transferred . Due to the revocation of the security department , Lead to frequent construction problems on the project site , And a safety accident occurred recently , The accident caused one death and one injury . The construction unit discussed at a meeting , Privately complete compensation matters with the families of the wounded , Normal construction on the construction site . Try to answer ：
（2） After a production safety accident occurs in the production and business operation unit , Relevant personnel at the scene of the accident shall report immediately （）.（  A  ）

A、 Person in charge of the unit

B、 Government safety management department

C、 project manager

D、 Supervisor

41、【 Single topic selection 】 A counter in a relay contactor control circuit , stay PLC Can be used in control （） replace .（  C  ）

A、M

B、S

C、C

D、T

42、【 Single topic selection 】 The consequence of short circuit operation of secondary side of voltage transformer is ().（  C  ）

A、 The main magnetic flux increases sharply , The iron loss increases , The iron core is overheated

B、 The secondary side voltage is zero , The primary voltage is also zero

C、 primary 、 The secondary winding is burnt out due to excessive current

D、 The instrument or breaker connected to the auxiliary side is burnt out due to excessive current

43、【 Single topic selection 】 The of ferromagnetic properties in the process of repeated magnetization B-H The relationship is ().（  B  ）

A、 Initial magnetization curve

B、 Hysteresis loop

C、 Basic magnetization curve

D、 Local hysteresis loop

44、【 Single topic selection 】 In order to catch up with the schedule of a project , The construction unit requires the construction unit to compress 2 The contract duration is months , The construction personnel at the construction site shall remove the outer frame in advance as required, leaving only an independent unloading platform . During construction, the platform frame is unstable and collapses , Cause platform operators 4 People die on the spot ,1 People are seriously injured ,1 A slight wound . Please answer the questions ：
（4） After the accident, which level of government in the place where the accident occurred shall organize the investigation of the accident （）.（  B  ）

A、 Provincial People's governments

B、 Municipal People's governments divided into districts

C、 People's governments at the county level

D、 Business involved

45、【 Single topic selection 】 The common emitter amplifier is ( ) form .（  B  ）

A、 Input ＩＢ; Output ＩＥ

B、 Input ＩＢ; Output ＩＣ

C、 Input ＩＥ; Output ＩＣ

D、 Input ＩＥ; Output ＩＥ

46、【 Single topic selection 】 An electric shock casualty accident occurred in the construction of manual hole digging pile in a project , According to the accident investigation , The safety management of the project is not in place , There is no on-site temporary power scheme in the construction organization design , There is no special construction scheme for manual hole digging pile . The distribution box at the accident site is not equipped with leakage protection switch , The three-phase four wire system is adopted for on-site power consumption . Please answer the relevant questions ：
（2）《 Technical code for safety of temporary electricity on construction site 》 Regulations , All electrical equipment on the construction site , In addition to zero connection for protection , Must be set at the head end of the equipment load line （）.（  B  ）

A、 Knife switch

B、 Leakage protection device

C、 air switch

D、HK2 Knife switch

47、【 Single topic selection 】 During driving with diesel pile hammer , No one is allowed to enter the area centered on the pile axis （） Within a radius .（  D  ）

A、1m

B、2m

C、3m

D、4m

48、【 Single topic selection 】 Neutral grounding equipment enclosure () The operation mode of is called protection zero connection .（  C  ）

A、 Grounding

B、 Grounding or neutral connection

C、 Connect the neutral line

D、 Grounding load

49、【 Single topic selection 】 according to 《 Regulations on management of special operation personnel in construction 》, Construction special operation personnel are within the validity period of qualification certificate ,2 The record of illegal operation during the year reached （） The above , The result of delayed review is unqualified .（  C  ）

A、1 Time （ contain 1 Time ）

B、2 Time （ contain 2 Time ）

C、3 Time （ contain 3 Time ）

D、4 Time （ contain 4 Time ）

50、【 Single topic selection 】 The secondary voltage of rectifier DC welding machine is too low , The cause of the failure may be ()（  A  ）

A、 Transformer primary coil interturn short circuit

B、 The polarity of saturation reactor control winding is reversed

C、 Voltage regulator resonance coil is short circuited

D、 The number of turns of the compensation coil of the voltage regulator is inappropriate

51、【 Single topic selection 】 Secondary wiring circuit newly installed in substation , Shall be measured ( ) Insulation resistance .（  D  ）

A、 Conductor to ground

B、 Cable core room

C、 Between adjacent conductors

D、 Three of the above

52、【 Single topic selection 】 The program controller can be divided into ( ) Categories: .（  D  ）

A、3

B、2

C、5

D、4

53、【 Single topic selection 】 according to 《 Ten regulations on quality and safety responsibility of construction project manager （ On a trial basis ）》,（） Must take full responsibility for the construction quality and safety of the project , Be responsible for establishing quality and safety management system , Be responsible for providing full-time quality personnel 、 Safety and other construction site management personnel , Be responsible for implementing the quality and safety responsibility system 、 Quality and safety management rules and regulations and operating procedures .（  B  ）

A、 Main person in charge of the enterprise

B、 project manager

C、 Technical director

D、 Supervisor

54、【 Single topic selection 】 according to 《 Regulations on safety supervision and administration of construction hoisting machinery 》, The user shall start from the date when the installation and acceptance of construction hoisting machinery is qualified 30 Intraday , Register the use of construction hoisting machinery with the competent construction Department of the local people's government at or above the county level where the project is located . The registration mark is placed on or attached to the equipment （）.（  C  ）

A、 Operating room

B、 Outside the operation room

C、 Prominent position

D、 Obvious position

55、【 Single topic selection 】 according to 《 Regulations on the administration of safe production of construction projects 》 Regulations , Operators shall comply with the mandatory standards for safe construction 、 Rules and regulations and operating procedures ,（） Safety protection equipment 、 Mechanical equipment, etc .（  A  ）

A、 Use... Correctly

B、 Wear correctly

C、 Assemble correctly

D、 Wear correctly

56、【 Single topic selection 】 according to 《 Regulations on the administration of safe production of construction projects 》 Regulations , The construction unit purchases 、 Rental safety protection equipment 、 Machinery and equipment 、 Construction machinery and accessories , Should have （） And product certificate .（  A  ）

A、 production （ manufacture ） license

B、 Quality grade certificate

C、 Quality inspection certificate

D、 Use license

57、【 Single topic selection 】 When using thermocouple to measure the temperature of high-temperature furnace , The signal given by the thermocouple is . Ann whole production simulation Pass the exam at one o'clock .( ) Kind of .（  D  ）

A、 Fast current signal

B、 A slowly changing current signal

C、 Fast voltage signal

D、 A slowly changing voltage signal

58、【 Single topic selection 】 according to 《 Regulations on the administration of safe production of construction projects 》, implement （） Of , The general contractor shall uniformly organize the preparation of emergency rescue plan for production safety accidents of construction project .（  C  ）

A、 Construction contract awarding

B、 Construction subcontracting

C、 General contracting for construction

D、 None of the above

59、【 Single topic selection 】 When connecting multi strand copper conductors , Insert the scattered wires into each other at intervals , Then close the open wire ends , Take any two strands and wind them at the same time () Behind the circle , Use the same method to exchange two strands and then wind them , And so on until it is finished .（  D  ）

A、2-5

B、3-5

C、4-5

D、5-6

60、【 Single topic selection 】 according to 《 Regulations on the administration of safe production of construction projects 》, The construction unit shall not compress （） Time limit .（  D  ）

A、 quota

B、 standard

C、 legal

D、 The contract stipulates that

61、【 Single topic selection 】 according to 《 Regulations on reporting, investigation and handling of production safety accidents 》, The following items are not included in the accident investigation report: （）.（  C  ）

A、 Overview of the accident unit

B、 Accident process and accident rescue

C、 The final treatment of the person responsible for the accident

D、 Accident prevention and rectification measures

62、【 Single topic selection 】 Carry out construction requirements for team workers every day 、 The safety disclosure of the working environment is low （）.（  C  ）

A、 Chief technical engineer

B、 Construction worker

C、 Team leader

D、 The supervisor

63、【 Single topic selection 】 The maximum protection radius of fire hydrant shall not be greater than （）m.（  C  ）

A、80

B、100

C、150

D、200

64、【 Single topic selection 】 Scaffolding works must be prepared in accordance with regulations 、 to examine （）, If it exceeds a certain scale, experts should be organized to demonstrate .（  D  ）

A、 Method statement

B、 Special safety management plan

C、 Safety management plan

D、 Special construction scheme

65、【 Single topic selection 】 Before operation of self-propelled scraper , The of the scraper should be checked （） And braking system , And confirm that it is sensitive and reliable .（  B  ）

A、 Hydraulic system

B、 to turn to

C、 Electrical system

D、 Engine chassis

66、【 Single topic selection 】 Small thyristor trigger circuit is suitable for ( ) In the controllable rectifier equipment .（  D  ）

A、 Small power

B、 Multiple high-power thyristor strings 、 Parallel use

C、 Multiple low-power thyristors in series 、 Parallel use

D、 High power and multiple high-power thyristor strings 、 Parallel use

67、【 Single topic selection 】 Install one 400KVA,60KV/0.4KV transformer , How large section should be selected ( ) cable .（  B  ）

A、VLV-3F240+1F25

B、VLV-(3F185+1F16)F2

C、VLV-(3F150+1F14)F2

D、VLV-(3F120+1F12)F2

68、【 Single topic selection 】 The single-phase grounding protection device of the transformer starts () Relay .（  D  ）

A、 electric current

B、 The signal

C、 middle

D、 zero sequence

69、【 Single topic selection 】 DC contactors are generally used to control ( ) The load of .（  C  ）

A、 weak current

B、 radio

C、 Direct current

D、 Alternating current (ac)

70、【 Single topic selection 】 The precipitation depth of light well points can generally reach （）.、 Safe production model I plan to take an exam Diantong 、（  A  ）

A、7m

B、8~20m

C、3~5m

D、10m

71、【 Single topic selection 】 When the bridge battery voltage is insufficient , Will affect the performance of the bridge ( ).（  A  ）

A、 sensitivity

B、 Security

C、 Accuracy

D、 Reading time

72、【 Single topic selection 】35KV What is the stroke of the conducting rod of the high voltage low oil circuit breaker .（  B  ）

A、200±5mm

B、250±5mm

C、300±5mm

D、350±5mm

73、【 Single topic selection 】（） It is generally used in combination with light well points or jet well points , It uses light well point or jet well point tube itself as cathode , Metal bar （ reinforced 、 Steel pipe 、 Aluminum bar, etc ） As an anode .（  B  ）

A、 Tube well point

B、 Electroosmosis well point

C、 Collecting well point

D、 Deep well point

74、【 Single topic selection 】 At present, the most widely used grounding megger, such as ZC-8 type , Belong to () Type of instrument .（  A  ）

A、 Potentiometer type

B、 Flow ratio meter type

C、 Bridge type

D、 Voltage and current

75、【 Single topic selection 】 The connection of aluminum core wire of power cable often adopts ( ).（  B  ）

A、 Plug in method

B、 Clamp method

C、 Binding method

D、 Welding method

76、【 Single topic selection 】（） The safety supervision department shall report the investigation, treatment and statistical analysis of potential major accidents in its administrative region to the State Administration of work safety for the record every six months .（  C  ）

A、 county-level

B、 Municipal level

C、 provincial level

D、 national level

77、【 Single topic selection 】（） It is the key link in the construction of foundation engineering or underground engineering .（  B  ）

A、 Foundation pit support

B、 Foundation excavation

C、 Pipe jacking construction

D、 Foundation pit monitoring

78、【 Judgment questions 】 If the two inputs of an XOR gate have the same level , The same level is high or low , The output is high .（  ×  ）

79、【 Judgment questions 】 Reactive power in AC circuit ’ Latest solution Analysis ’ The unit of power is also watt .（  ×  ）

80、【 Judgment questions 】() The oil circuit breaker usually passes through 2～3 Secondary full capacity trip , Disassembly and maintenance must be carried out .（  ×  ）

81、【 Judgment questions 】 Two are marked with “220V,40W” The bulbs are connected in series and then connected to 220V On the power supply of , The actual power of each bulb is 20W.()（  ×  ）

82、【 Judgment questions 】()《 National power supply rules 》 Regulations , Users whose power factor cannot meet the specified requirements , The power supply bureau may refuse to supply electricity .（  ×  ）

83、【 Judgment questions 】 The construction organization of overhead line shall include pole position measurement 、 Dig a hole 、 Row bar 、 Group rod 、 Stand up 、 Stringing and other links .（  √  ）

84、【 Judgment questions 】 In resistive load three-phase bridge semi controlled rectifier circuit , The pulse phase shift range is 180°.（  √  ）

85、【 Judgment questions 】 Full time safety production management personnel are responsible for on-site supervision and inspection of safety production .（）（  √  ）

86、【 Judgment questions 】 When it has been determined that the DC grounding fault of the substation is under protection 、 When operating the circuit , Ask for instructions “ Safety production simulation test 1 spot through “ Power dispatching , Take switching operation measures , Stop the protection and operation of DC circuit and then deal with it .（  √  ）

87、【 Judgment questions 】() The voltage between a certain point in the electric field and the reference point is the potential at that point .（  √  ）

88、【 Judgment questions 】() When arc welding is used , The diameter of welding rod mainly depends on the thickness of welding workpiece .（  √  ）

89、【 Judgment questions 】（） Two ZDL＝100 When the high-voltage silicon stack is used in series , If no pressure equalizing measures are taken , Then the service voltage shall be... Of the sum of the rated voltage of the silicon stack 70～80%.（  √  ）

90、【 Judgment questions 】 Compared with the digital circuit composed of discrete components, digital integrated circuit has the advantages of high reliability and miniaturization .（  √  ）

91、【 Judgment questions 】 Three phase synchronous motor can only be started asynchronously , Only when the rotor speed is close to the synchronous speed, the excitation power supply needs to be added , Other starting methods do not have this requirement .（  ×  ）

92、【 Judgment questions 】 In single-phase controllable rectifier circuit , The larger the control angle , The greater the average value of DC voltage on the load .（  ×  ）

93、【 Judgment questions 】 Management of warehouse storing combustible materials , Fire protection technical standards and management regulations must be implemented .（）（  √  ）

94、【 Judgment questions 】() Iodine tungsten lamps can be installed horizontally , It can also be installed vertically .（  ×  ）

95、【 Judgment questions 】 The earth is what electricity calls " The earth ".（  ×  ）

96、【 Judgment questions 】 Construction in the suburbs , There is no need to set fences around the site .（）（  ×  ）

97、【 Judgment questions 】 The construction unit fails to submit the measures to ensure safe construction or the relevant materials of the demolition project to the relevant departments for the record , Order to make corrections within a time limit , And give a warning and a ticket .（）（  ×  ）

98、【 Judgment questions 】 The construction unit is adopting new technology 、 New technology 、 New equipment 、 New materials , Operators shall be provided with corresponding safety production education and training .（）（  √  ）

99、【 Judgment questions 】 The power system at the construction site is strictly prohibited to use the earth as phase line or zero line .（）（  √  ）

100、【 Judgment questions 】 The wall connecting rod shall be able to bear tension 、 Flexible structures subjected to compressive loads .（）（  ×  ）

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