2022 coal mine water exploration and drainage special operation certificate examination question bank simulated examination platform operation

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

2022 The National Question Bank of water exploration and drainage in coal mines is the question bank of the new textbook outline of the practice questions of water exploration and drainage in coal mines ！2022 The operation of the simulated examination platform of the examination question bank of the special operation certificate for water exploration and drainage in coal mines is based on the latest compilation of teaching materials for water exploration and drainage in coal mines . Coal mine water exploration and drainage test simulation questions pass the safety production simulation examination and pass the wrong question practice .

1、【 Multiple choice 】 The mechanical and electrical equipment shall be set in the underground air inlet chamber , When diffusion ventilation is adopted in the chamber, the requirements that should be met are ( ).（ ABC ）
A、 The depth of the chamber shall not exceed 6m
B、 The width of the chamber entrance shall not be less than 1.5m
C、 There is no gas emission in the chamber
D、 The chamber is arranged in the rock stratum
E、 Equipped with methane sensor
2、【 Multiple choice 】 About the operation behavior of underground electrical appliances , Illegal operation is ( ).（ ABCDE ）
A、 Live working
B、 Do not hang the tag for power failure operation
C、 The protection device of electromechanical equipment is released and operated
D、 Non full time personnel or non on duty electrical personnel operate electrical equipment without authorization
E、 Underground live mobile electrical equipment
3、【 Multiple choice 】 The main basis for judging fracture is ( ).（ ABCD ）
A、 Pain
B、 swelling
C、 deformity
D、 Dysfunction
4、【 Multiple choice 】 Symptoms after cardiac and respiratory arrest are ( ).（ ABCD ）
A、 The pupils are dilated 、 Fix
B、 heart sounds 、 Disappearance of pulse
C、 Cyanosis
D、 Loss of mind
5、【 Multiple choice 】 Under which of the following conditions can the driving roadway not be blasted ( ).（ ABCD ）
A、 When there is water inrush omen at the heading face or blast hole
B、 When the lead distance of the water probe hole is not enough
C、 When the empty top distance exceeds the specified value
D、 When the support of the heading face is not firm
6、【 Multiple choice 】 The design of water exploration and drainage in the old goaf shall include ( ) Wait for drawings .（ ABCD ）
A、 Location of old empty space and plan of ponding area
B、 Drilling plan
C、 Borehole profile
D、 Structural drawing of water exploration and drainage borehole
7、【 Multiple choice 】 Rig gearbox 、 When there is abnormal noise in the transfer case , Should be ( ).（ ABC ）
A、 Check the gear , If the wear is serious , To replace the gear
B、 Check the shaft , If it deforms and bends , To replace or correct
C、 Check the axle box , Clean the lubricating oil when there is foreign matter , Remove foreign matter
D、 Check the amount of oil in the transmission , If too much , To reduce the amount of oil
8、【 Multiple choice 】 The installation of drilling rig equipment shall meet the following requirements: ( ).（ ABC ）
A、 Check before installation 、 Refurbish the equipment
B、 Align the vertical shaft of the drill with the drilling position , Straighten the drill frame
C、 The fuselage is installed smoothly , Tighten the bottom fixing screw
D、 Measure drilling tools

9、【 Multiple choice 】 The measures that should be taken to prevent roadway roof fall accidents mainly include ( ) etc. .（ ABCD ）
A、 Reasonably arrange the roadway
B、 Reasonable selection of roadway section shape, section size and support mode
C、 Sufficient support strength , Strengthen support and maintenance
D、 Adhere to the system of knocking on the help and asking for the top
10、【 Single topic selection 】 In general , Of coal dust ( ) The higher the , The easier it is to explode .（ B ）
A、 ash content
B、 Volatile matter
C、 Calorific value
11、【 Single topic selection 】 The gas concentration of the return air flow of the special gas drainage roadway shall not exceed ( ), When this value is reached, an alarm signal shall be sent .（ A ）
A、2.5%
B、1.5%
C、1%
12、【 Single topic selection 】 Wound dressing should extend beyond the edge of the wound ( ), Don't tie a knot on the wound .（ C ）
A、1 to 3cm
B、4 to 5cm
C、5 to 10cm
D、6 to 10cm
13、【 Single topic selection 】 The old sky strongly recharged by surface water , Try to avoid discharging water in ( ) Conduct .（ B ）
A、 In the winter
B、 rainy season
C、 In the spring
D、 Dry season
14、【 Single topic selection 】 People who stop breathing due to electric shock , Should be adopted immediately ( ) Rescue .（ A ）
A、 Artificial respiration
B、 Whole body massage
C、 Heart resuscitation
15、【 Single topic selection 】 Under the same conditions , drilling ( ) Wear of drill pipe is the greatest .（ C ）
A、 Large elevation hole
B、 Chaotian hole
C、 Horizontal hole
D、 Sagging hole
16、【 Single topic selection 】 During shield construction , Operators of vertical transport machinery , Be sure to check before work （） Carry out safety checks .（ D ）
A、 Protective equipment
B、 Operating room
C、 Workplace
D、 Hoist and other equipment
17、【 Single topic selection 】 according to 《 Regulations on the administration of safe production of construction projects 》, The construction unit shall be responsible for the management personnel and operation personnel （） Safety production education and training .（ C ）
A、 At least once a season
B、 At least once a month
C、 At least once a year
D、 At least twice a year
18、【 Single topic selection 】 High water pressure 、 Floor karst water with strong water abundance , The best policy is to adopt ( ) Technical prevention .（ A ）
A、 Grouting to reinforce the water resisting layer or transform the aquifer
B、 Increase drainage capacity
C、 Strengthen the support to reduce the influence of mining
D、 Drainage mining
19、【 Single topic selection 】 When mining abandoned water proof coal pillars under water flooded areas , Should be ( ).（ B ）
A、 Exploration before mining
B、 Drainage mining
C、 Mining while exploring
D、 Drain and depressurize
20、【 Single topic selection 】 According to the specification GB50202—2002 The side wall safety of foundation pit is divided into （） Level .（ B ）
A、2
B、3
C、5
D、6
21、【 Single topic selection 】 When drilling, on-site operators , Unexpected water was found in the borehole , want ( ), And report to the mine control room immediately .（ A ）
A、 Stop drilling , Do not pull out the drill pipe
B、 observe , Keep drilling
C、 Stop drilling , Pull out the drill pipe
D、 Pull out the drill pipe , Close the gate valve
22、【 Single topic selection 】 Hot work area is divided into （） level .（ C ）
A、1
B、2
C、3
D、4
23、【 Single topic selection 】 Of tower crane （） And other major structural members shall be provided with permanent marks that can trace the manufacturing date .（ D ）
A、 Standard section 、 Weight 、 Pull rod 、 top of a tower
B、 Standard section 、 Boom 、 Weight 、 top of a tower
C、 Standard section 、 Boom 、 Pull rod 、 Weight
D、 Standard section 、 Boom 、 Pull rod 、 top of a tower
24、【 Single topic selection 】 The ignition temperature of gas is generally considered to be ( ).（ A ）
A、650 to 750℃
B、750 to 850℃
C、600 to 700℃
25、【 Single topic selection 】 Waste that may cause secondary pollution shall be treated （） Store , And set up eye-catching signs .（ B ）
A、 Airtight
B、 A separate
C、 classification
D、 Merge
26、【 Single topic selection 】 The water sample cooler shall be able to ensure that the water sample flow reaches （）ml/min.（ C ）
A、300
B、400
C、500-700
D、800
27、【 Single topic selection 】 In case of accidents during construction ,（） Emergency measures should be taken to reduce casualties and accident losses , And timely report to the relevant departments in accordance with the relevant provisions of the state .（ D ）
A、 Construction unit
B、 construction control unit
C、 Relevant responsible personnel
D、 Construction enterprises
28、【 Single topic selection 】 The service life of plastic safety helmet shall not exceed （）.（ B ）
A、2 year
B、3 year
C、4 year
D、5 year
29、【 Single topic selection 】 The air temperature at the mining face of the production mine exceeds 30℃、 The air temperature of electromechanical equipment chamber exceeds 34℃ when , must ( ).（ A ）
A、 Stop job
B、 Shorten the working time of the staff
C、 Give high-temperature health care treatment
D、 Limited time operation
30、【 Single topic selection 】 air 、 The concentration of carbon monoxide in the carbon monoxide mixture reaches ( ) when , Explosive .（ A ）
A、12.5% to 75%
B、13% to 65%
C、20% to 50%
D、30% to 50%
31、【 Single topic selection 】 A construction site is in 3 Floor construction , Workers are carrying bricks , Because the operation layer is not fully paved with scaffold board , Only a few scaffold boards , And some joints are not fixed , Worker Wang moved bricks three times , One foot on an unfixed probe board , Immediately overturn , Drop Wang , Cause thigh fracture .
（2） When the scaffold board is overlapped and laid , The joint must be supported on the transverse horizontal bar , The lap length and the length extending out of the horizontal bar shall be respectively （）.（ D ）
A、 Greater than 80mm And not less than 50mm
B、 Greater than 40mm And not less than 100mm
C、 Greater than 100mm And not less than 50mm
D、 Greater than 200mm And not less than 100mm
32、【 Single topic selection 】 The old cellar water is accumulated for many years , Poor water circulation conditions , Water contains a large amount of hydrogen sulfide gas , Concurrent . Security raw The production simulation test is a little through . by ( ).（ A ）
A、 Acid water
B、 Neutral water
C、 Alkaline water
D、 Weakly alkaline water
33、【 Single topic selection 】 The prevention and control of occupational diseases shall adhere to ( ) The policy of , Implement classified management 、 Comprehensive management .（ A ）
A、 Prevention first 、 combine prevention with control
B、 To treat 、 combine prevention with control
C、 Safety first 、 Prevention first
34、【 Single topic selection 】 Before water exploration in mining face , Water exploration and drainage design shall be prepared , determine ( ).（ C ）
A、 Water exploration team
B、 Model of drilling rig
C、 Water exploration warning line
D、 Water exploration time
35、【 Multiple choice 】 The device used by the gas cylinder to prevent backfilling includes （）.（ ADE ）
A、 Check valve
B、 Stem 、 Disc
C、 Hold down nut
D、 Check valve
E、 Buffer tank
36、【 Single topic selection 】 The competent department of housing and urban rural development under the State Council shall, after the occurrence of a particularly serious or serious accident （） Within hours , Report the accident to the State Council .（ D ）
A、1
B、2
C、3
D、4
37、【 Multiple choice 】 The construction site shall be provided with （） Temporary fire fighting facilities .（ ABD ）
A、 Fire extinguisher
B、 Temporary fire water supply system
C、 Fire elevator
D、 Emergency lighting
E、 Self provided generator set
38、【 Single topic selection 】 The general items in the construction elevator inspection scoring table are （）.（ A ）
A、 Communication device
B、 a wire rope 、 Pulley and counterweight
C、 Attachment
D、 Protective facilities
39、【 Multiple choice 】《 Regulations on the administration of safe production of construction projects 》 basis （） To develop .（ AD ）
A、《 Construction Law of the people's Republic of China 》
B、《 Urban Planning Law of the people's Republic of China 》
C、《 Construction project quality management regulations 》
D、《 Production safety law of the people's Republic of China 》
E、《 Regulations on the administration of survey and design of construction projects 》
40、【 Single topic selection 】 The filter shall be in accordance with （） To determine whether backwashing is required .（ D ）
A、 Salt content of effluent
B、 The elapsed time
C、 Effluent turbidity
D、 The pressure drop of water flow through the filter
41、【 Single topic selection 】 Double row scaffolds shall be provided with （）.（ A ）
A、 Cross bracing and transverse diagonal bracing
B、 Cross bridging
C、 Transverse diagonal brace
D、 Cross bracing and transverse diagonal bracing are not required
42、【 Single topic selection 】 After the steel formwork components are removed , The distance between the temporary stacking place and the edge of the floor shall not be less than （）.（ C ）
A、0.8m
B、0.9m
C、1.0m
D、1.1m
43、【 Multiple choice 】 Construction site （） You should wear an identification plate .（ CE ）
A、 Guard
B、 Testing personnel
C、 Management
D、 Inspectors
E、 The operator
44、【 Multiple choice 】 When the moment limiter of tower crane works , It is allowed to adopt the operation mode （）.（ AB ）
A、 The hook is lowered
B、 The load runs towards the arm root
C、 The load drops freely
D、 The hook rises
E、 The load runs towards the arm end
45、【 Single topic selection 】《 Boiler water （ Medium ） Quality treatment supervision and management rules 》 Specified in the , Boiler water treatment shall be able to ensure that the boiler water quality meets （） The provisions of the .（ D ）
A、GB/T1576-2008《 Industrial boiler water quality 》
B、GB/T12145-2008《 Water and steam quality of thermal power units and steam power equipment 》
C、DL/T912-2005《 Water and steam quality standard for supercritical thermal power generating units 》 In the boiler technical archives of the user .
D、 Other options are
46、【 Multiple choice 】 according to 《 Regulations on the administration of safe production of construction projects 》 The construction unit is using （） when , Operators shall be provided with corresponding safety production education and training .（ ABDE ）
A、 New technology
B、 The new material
C、 New structure
D、 New equipment
E、 New technology
47、【 Multiple choice 】 The necessary safety devices on the tower crane are （）.（ ABCD ）
A、 Torque limiter
B、 load lifting limiter
C、 Lifting height limiter
D、 Rotary stopper
E、 Fall arrester
48、【 Single topic selection 】 Keep at least between lighting fixtures and flammable stacks （） distance .（ B ）
A、0.5m
B、1m
C、1.5m
D、2m
49、【 Single topic selection 】 The statement of the location of the concrete pump truck is correct （）.（ B ）
A、 The location of pump truck shall be flat and solid , There are no obstacles around , There should be high-voltage power lines overhead , Easy access to electricity . The pump truck shall not be parked on the slope .
B、 The location of pump truck shall be flat and solid , There are no obstacles around , There is no high-voltage transmission line overhead . The pump truck shall not be parked on the slope .
C、 The location of pump truck shall be flat and solid , There should be obstacles around to protect the body , There is no high-voltage transmission line overhead . The pump truck shall not be parked on the slope .
D、 The location of pump truck shall be flat and loose , There are no obstacles around , There is no high-voltage transmission line overhead . The pump truck shall not be parked on the slope .
50、【 Single topic selection 】 Fastener type steel pipe support is higher than （） Horizontal cross bridging shall be set when .（ D ）
A、7.0m
B、6.0m
C、5.0m
D、4.0m
51、【 Multiple choice 】 Fastener type steel pipe formwork support 、 Safety production mold Proposed examination Try a little through 、 The bottom of the rod shall normally be provided with （）.（ AB ）
A、 base
B、 Full length wood base plate （ The board length is greater than 2 Spacing between poles ） The plate thickness shall not be less than 50mm
C、 Concrete base plate
D、 Steel column base
E、 Plain soil
52、【 Single topic selection 】 Which of the following conditions will cause random error in the analysis test （）.（ D ）
A、 Method error
B、 The error introduced by the instrument
C、 Error introduced by reagent
D、 Measure the temperature fluctuation
53、【 Single topic selection 】 Of a project 1 The lifting cage of material hoist No. 2 stops on the second floor , Female worker Tang carries out unloading operation , Operators leave temporarily . At this time, another team called for the lifting of the adjacent 2 Hoist No , here , Hu, a worker passing by, started the unloading 1 Hoist No ; Tang is straddling between the cage and the platform , The rising elevator overturned Tang , Fall from the derrick platform on the second floor to the bottom of the derrick , Hit his head on the derrick pole , After many days of rescue , Died of intracranial hemorrhage .
（1） The material hoist refers to a machine with a rated lifting capacity of （） following , Take the ground winch as the traction power , By underframe 、 Columns and roof beams form a frame , The lifting cage moves up and down along the guide rail , Lifting equipment for vertically conveying materials .（ D ）
A、800kg
B、1000kg
C、1500kg
D、2000kg
54、【 Multiple choice 】 The electric hoist shall be intact , If found （） Wait for the situation , It must be repaired or replaced .（ ADE ）
A、 Cylinder crack and deformation
B、 Insufficient oil in reduction gearbox
C、 Surface wear
D、 The drum shaft is seriously worn
E、 Drum wall thinning 10％
55、【 Single topic selection 】 Tower crane with luffing boom , The distance from the top of the hook to the bottom of the jib is the minimum 800mm Location time ,（） Should act , Stop the lifting movement immediately .（ A ）
A、 Lifting height limiter
B、 Lifting moment limiter
C、 load lifting limiter
D、 Amplitude limiter
56、【 Multiple choice 】 The following description of tower crane installation is correct （）.（ ABCE ）
A、 Before installation, special construction scheme shall be followed , Check the acceptance records of concealed works of tower crane foundation, concrete strength report and other relevant data
B、 As well as the foundation and foundation bearing capacity of the auxiliary installation equipment
C、 After the auxiliary installation equipment is in place , Its mechanical and safety performance shall be checked , Only after passing the test can the operation be started
D、 After the auxiliary installation equipment is in place , The mechanical and safety performance can not be checked
E、 Steel wire rope used for installation 、 snap ring 、 Lifting equipment such as hooks shall not be used until they have passed the inspection
57、【 Single topic selection 】 The following description about the safe use of machinery is incorrect （）.（ B ）
A、 The machinery shall not operate with faults
B、 Electrical mechanical equipment must be connected from the distribution box
C、 Machinery with incomplete or invalid safety protection devices shall not be used
D、 All kinds of machinery operators shall receive professional training 、 Only those who pass the examination or obtain the operation certificate can work with the certificate
58、【 Multiple choice 】 The function of steel bar straightener is （）.（ BCDE ）
A、 The tensile
B、 Straighten it up
C、 Cut off the
D、 Transportation
E、 Eliminate scale
59、【 Single topic selection 】 The installation site of pile driver shall be flat and solid , When the bearing capacity of the foundation cannot reach the specified compressive stress , Subgrade boxes or boxes shall be laid under the track 30mm Thick steel plate . The spacing shall not be greater than （）mm.（ C ）
A、500
B、300
C、100
D、700
60、【 Single topic selection 】 During deep foundation pit monitoring , Requirements for the number of displacement observation datum points （）, And shall be set outside the scope of influence .（ A ）
A、 No less than 2 spot
B、 Not more than 2 spot
C、 No less than 3 spot
D、 Not more than 3 spot
61、【 Multiple choice 】 Scaffolds and their foundations shall be installed at （） Inspection and acceptance shall be carried out at different stages .（ BDE ）
A、 Before returning to use after being out of service for more than half a month
B、 After reaching the design height
C、 After each erection 5m~8m After height
D、 Before applying load on the working layer
E、 After the foundation is completed 、 Before scaffold erection and after cantilever beam installation
62、【 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
63、【 Judgment questions 】 It is forbidden to directly ground the neutral point of underground distribution transformer ‘ Safe production simulation Pass the exam at one o'clock ‘.（ √ ）
64、【 Judgment questions 】 The borehole diameter of underground water exploration shall not be less than 75mm.（ × ）
65、【 Judgment questions 】 Before the leakage protector is used every day, the leakage test button shall be started for trial tripping , Do not continue to use when the test jump is abnormal .（ √ ）
66、【 Judgment questions 】 Heading faces ventilated with local fans , Don't stop the wind .（ √ ）
67、【 Judgment questions 】 Found someone electrocuted , It should be pulled away from the power supply by hand .（ × ）
68、【 Judgment questions 】 A dedicated telephone shall be installed at or near the drilling site .（ √ ）
69、【 Judgment questions 】 Specification for boiler water （ Medium ） Quality treatment work , Promote the safety of boiler operation 、 economic 、 Energy saving 、 Environmental protection , Is to formulate 《 Boiler water （ Medium ） Quality treatment supervision and management rules 》 Purpose .（ √ ）
70、【 Judgment questions 】 Porous aquifers mostly fill the pit with water in the form of relatively uniform infiltration , No harm to the mine .（ × ）
71、【 Judgment questions 】 For indirect water filled aquifers , You can leave it alone .（ × ）
72、【 Judgment questions 】 The installation unit of the hanging basket for work at heights shall issue a self inspection report after installation , Just can use .（ × ）
73、【 Judgment questions 】 The temperature of ignition gas explosion is fixed .（ × ）
74、【 Judgment questions 】 power switch 、 After the control box and other facilities are locked, there is no need to assign a special person to take charge .（ × ）
75、【 Judgment questions 】 All underground coal mines shall provide personnel entering the well with a rated protection time of not less than 30min Your self rescuer , Personnel entering the well shall carry with them .（ √ ）
76、【 Judgment questions 】 Foundation pit construction “ Latest solution Analysis “ Upon completion of construction, the foundation structure construction shall be carried out in time , It is forbidden to expose the foundation pit for a long time .（ √ ）
77、【 Judgment questions 】 The excavation roadway must be ventilated by mine full air pressure ventilation or local fan .（ √ ）
78、【 Judgment questions 】 Before exploring and releasing water , The roadway must be cleaned , Clear and dig ditches , Keep the waterway clear .（ √ ）
79、【 Judgment questions 】 Before water exploration , The water exploration line shall be determined and drawn on the mining engineering plan .（ √ ）
80、【 Judgment questions 】 The valence of an element is the number of electrons gained, lost or transferred when the atoms of this element form a compound with the atoms of other elements .（ √ ）
81、【 Judgment questions 】 Intrinsically safe electrical equipment , Sparks or thermal effects produced under normal operating conditions cannot ignite explosive mixtures ; Sparks or thermal effects generated in the fault state can ignite the explosive mixture .（ × ）
82、【 Judgment questions 】 The water disaster of coal seam floor generally will not cause well flooding accident .（ × ）
83、【 Judgment questions 】 There are certain risk factors in coal production activities , An enterprise may enter into a contract with its employees “ A contract of life and death ”, However, the risk factors must be truthfully informed to the practitioners , It shall come into force after being signed by both parties ; otherwise , The contract will be deemed null and void .（ × ）
84、【 Judgment questions 】 A construction company , In order to arrange the employment of laid-off workers , On the roadside of the market town 30㎡ In the room , Opened an electrical welding repair shop . To save money , The welder is an old machine that has been out of service for one year , The knife switch is used to measure the power supply once , And installed indoors , The doorway and roadside are welding and cutting places . Indoor welding and cutting tools 、 Oxygen bottle 、 Acetylene cylinder storage room , It is also a place for workers to have lunch and rest . The company has only conducted short-term training for workers , Then I started my homework .
（4） The purpose of the above-mentioned construction enterprises is to arrange the employment of laid-off workers , The company's training of employees may not be the same as that of other employees , There is no limit on the .（ × ）
85、【 Judgment questions 】 The underground permanent refuge chamber of coal mine is a facility for miners to rest while working .（ × ）
86、【 Judgment questions 】 When the competent construction department issues the construction permit or approves the commencement report , It is not necessary to review the allocation of full-time safety production management personnel for the project .（ × ）
87、【 Judgment questions 】 When handling sealed jars of concentrated acid or caustic solution , The jar should be placed in a strong wooden box or basket （ Mouth up ）, And plug it with a soft object . There should be a firm handle on the wooden box or frame basket , Two people carry a jar , It is not allowed to move alone . When carrying with a car or a suitcase , Wooden cases or baskets must be firmly placed on the vehicle or carried in the case , Or bind it . Under special circumstances, it can be carried by shoulder 、 Carry the jar by carrying it on your back or holding it .（ × ）
88、【 Judgment questions 】 Coal mining enterprises shall distribute labor protection articles to employees to ensure safe production .（ √ ）
89、【 Judgment questions 】 Check the detector ” Safety production simulation exam A little ” The organization shall, in accordance with relevant laws and regulations 、 Safety technical specifications 、 design code 、 Check the boiler water treatment design or transformation scheme according to the water quality standard .（ √ ）
90、【 Judgment questions 】 When the reverse osmosis equipment is shut down , Protective liquid shall be injected for protection .（ × ）
91、【 Judgment questions 】 In case of an accident in a coal mine, we should actively carry out rescue , Safety measures shall be formulated in the rescue work , Ensure personal safety .（ √ ）
92、【 Judgment questions 】 The electrical equipment used in underground coal mine must be explosion-proof electrical equipment .（ × ）
93、【 Judgment questions 】 Installation of construction elevator 、 Prior to disassembly, notification procedures shall be handled .（ √ ）
94、【 Judgment questions 】 When electrical equipment is on fire , The power supply should be cut off first . Before cutting off the power , Only non-conductive fire extinguishing equipment is allowed to be used for fire extinguishing .（ √ ）
95、【 Judgment questions 】 When breaking large caustic soda , You can wrap it with waste cloth first , To prevent the fine pieces from flying out .（ √ ）
96、【 Judgment questions 】 The mine has a large demand for water 、 Ponding area with high water pressure , The drainage hole shall be drilled from the top and bottom slate of the coal seam , Lower the water pressure , Then drill holes along the coal seam .（ √ ）
97、【 Judgment questions 】 Employees of mining enterprises have no right to obtain information about workplace safety and occupational hazards .（ × ）
98、【 Judgment questions 】 One of the main causes of belt deviation of belt conveyor is the uneven stress of belt .（ √ ）
99、【 Judgment questions 】 After taking certain safety measures , Blasting materials can be transported by scraper conveyor .（ × ）
100、【 Judgment questions 】 The isolated self rescuer is not limited by the oxygen concentration of external gas , It can be used in the environment containing various toxic gases and lack of oxygen .（ √ ）
Support the examination questions of precision coal mine water exploration and drainage operation 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 .