A. Must B. Yes C. No.
When you open the door and smell the gas, you should (b) stop the fire quickly.
A. Turn on the gas cooker and find the leaking part. B. Open the doors and windows for ventilation.
48.(B) Responsible for fire safety on the construction site.
A. construction unit b, construction unit c and design unit
49. When the gas in the liquefied gas tank is insufficient, it should be (b).
A. heat it in hot water. B. take a deep breath. Place the gas tank horizontally.
50. Without the consent of (c), it is not allowed to move the gas pipeline at will in home decoration, so as to avoid gas leakage, fire or explosion.
A. Fire Department B. Property Department C. Gas Department
1. Call? 1 19? What matters should be clarified when reporting a fire alarm?
A:
(1) specify the name of the fire unit, the village, district, street and house number;
(2) It is necessary to know what is on fire, how big the fire is, whether there are explosives and dangerous chemicals, and whether anyone is trapped;
(3) Make clear the name, unit and telephone number of the alarm person; (4) Answer the fire brigade's inquiry clearly and concisely.
2. What tests should I do before going to bed, going out and getting off work?
Answer: Check whether the electricity and gas are turned off and whether the fireworks are extinguished.
3. How to use the dry powder fire extinguisher?
Answer: Before the dry powder fire extinguisher is hoisted to the combustible, stand on the upwind or crosswind side, shake it up and down several times, unplug the safety pin or lead seal, hold the nozzle with one hand, aim at the root of the flame, and press the handle with the other hand to spray dry powder. When putting out the fire, swing the nozzle quickly, so that the powder mist sweeps the whole fire area and pushes from near to far to put out the fire. At the same time, it should be noted that no kindling can be left, and the oil is on fire, so it can't be sprayed directly to prevent the liquid from splashing, which will bring difficulties to the fire fighting.
4. What should I do if my clothes catch fire? How to prevent smoke from coming in through the door after the fire?
Answer: It's best to take off or lie down on the spot, cover your face with your hands and roll over to put out the fire, or jump into the nearest pool to put out the fire.
Block the door with adhesive tape or wet towels, sheets, clothes, etc.
5. If you are trapped indoors in a fire, how to rescue you?
Answer: (1) Go to a place that is easy to be rescued (such as a window near the main road or a room near the entrance). ).
(2) Try to inform people outside (tell 1 19 by phone or mobile phone where you are trapped, or call directly from the window with clothes and lights).
(3) Prevent smoke from flowing in.
Test questions on safety knowledge of welding and hot cutting operations
I. Accident case analysis (gas cutting explosion accident in chemical plant)
One afternoon, a chemical factory exploded, killing four people and injuring two others. The accident caused a direct economic loss of about 3 million yuan.
(1) The course of the accident
One afternoon, a water suction pump near the tail gas (ammonia) absorption device in the first workshop of a chemical plant (sodium cyanate workshop and potassium cyanate workshop) was not working normally. Guo, the deputy director in charge of production and safety of the plant, took advantage of the shift change of workers to command Tao, a mechanic (without a special operation certificate), to carry out gas cutting operation on an unused pump in order to repair the problematic water suction pump, but no residue was left in the device before the gas cutting operation. At about 16: 45, the combustible gas in the device exploded due to gas cutting operation. At that time, there were Guo, deputy director, Tao, mechanic, Wei, a transport company escort who delivered goods in the factory, Ma and Dai, workshop operators, and Liu, an operator near the workshop. The explosion caused Guo and Wei to die on the spot. The north wall of a workshop collapsed and the roof was overturned. All the building glass within 200 meters was broken and the roof was damaged to varying degrees. Tao and Dai were buried in the ruins of the explosion and died. Ma and Liu were injured in the head and arms to varying degrees in the explosion.
(2) Cause analysis of the accident
Direct cause:
First, Guo, as the deputy director in charge of production and safety, has a weak sense of safety and violates the regulations on hot work. Within the scope of hot work, no combustible gas was detected, and the ammonium sulfate storage tank was not replaced. In violation of regulations, Tao, a mechanic without welding qualification, was instructed to carry out gas cutting operations.
Second, Tao was unqualified and operated illegally, causing flammable gas explosion.
Indirect cause:
Enterprise special operations personnel work without a license and fail to educate and urge employees to strictly implement the rules, regulations and operating procedures of their own units.
(iii) accident lessons and preventive measures
First, we must strictly follow the relevant regulations on safe production to ensure that our unit has safe production conditions;
Second, it is necessary to strengthen the safety training and education for enterprise employees to ensure that special operations personnel hold certificates;
Third, it is necessary to urge employees to operate in strict accordance with the operating rules, and it is strictly forbidden to command and take risks in violation of regulations.
Second, multiple choice questions
1, when people's eyes come into contact with the strong visible light of welding arc, it is usually called electric welding? Hyun? , there will be ().
A, eye cataract B, I can't see things clearly at the moment C, my eyes are dry
2, the formation of ozone in the welding process, because the oxygen in the air under the excitation of short wave (), has been greatly damaged.
A, infrared ray b, ultraviolet ray c, visible light
3.(c) When supplying gas to welders wearing ventilation caps, it should be used.
A, compressed nitrogen b, oxygen c and treated compressed air
4, nitrogen oxides produced in the process of welding is irritating toxic gas, mainly for the stimulation of ().
A, lung b, liver c, heart
5. Among the following welding methods, () produces the highest concentration of carbon monoxide.
A, CO2 gas shielded welding B, covered electrode arc welding C, gas welding
6, toxic gas () is mainly produced in covered electrode arc welding using alkaline covered electrode.
A, carbon monoxide b, ozone c, hydrogen fluoride
7. Long-term eye contact () may cause infrared cataract.
A, visible light b, infrared light c, ultraviolet light
8, radioactive and high frequency electromagnetic field hazards of welding method is ().
A. Submerged arc welding
B. carbon dioxide shielded welding
C, tungsten argon arc welding
9, when the eyes are () short-term irradiation, can cause acute keratoconjunctivitis.
A, visible light b, infrared light c, ultraviolet light
10, welder's pneumoconiosis is an occupational disease caused by welder's long-term contact ().
A, metal smoke b, toxic gas c, radiation
1 1, the work clothes not suitable for welders are ().
A, alum cloth b, chemical fiber cloth c, woolen cloth
12, the welding process that produces harmful factors of high-intensity noise is ().
A, submerged arc welding b, argon arc welding c, plasma arc welding
13, carbon dioxide gas under the action of arc high temperature is decomposed into harmful to human body ().
A, nitrogen oxides b, carbon monoxide c, ozone
14, "hygienic standard for noise in industrial enterprises" stipulates that the noise standard in the workplace of enterprise production workshop is ().
a、85dB B、95 dB C、 105 dB
15. The main components of welding ferrous metal dust are iron, () and silicon.
A, manganese b, lead c, aluminum
Third, multiple choice questions
1, the toxic gas produced by welding mainly refers to: ().
A, ozone b, hydrogen fluoride c, carbon monoxide d, nitrogen oxides
2. The occupational diseases that may be caused by the failure of labor protection during welding are: (), etc.
A, welder's pneumoconiosis B, welder's metal fever C, electro-optic ophthalmia D, welder's manganese poisoning
3, welding arc radiation mainly includes ().
A, ultraviolet b, infrared c,? Ray d, visible light
4, comprehensive mechanical ventilation smoke exhaust method is divided into () three kinds.
A, transverse smoke exhaust b, upper smoke exhaust c, lower smoke exhaust d, random smoke exhaust
5, welder long-term contact with metal dust, such as poor protection is in danger of forming ().
A, welder's pneumoconiosis B, welder's metal fever C, welder's lead poisoning D, welder's manganese poisoning
6, welder posture strain mainly has () disease.
A, lumbar B, infertility C, cervical D, knee joint
7, in the process of welding, toxic gases mainly include (), carbon monoxide and hydrogen fluoride, etc.
A, ozone b, sulfide c, nitrogen oxide d and phosphide
8, welding operation will produce harmful factors (), radioactive substances, noise, etc.
A, metal smoke b, toxic gas c, arc radiation d, high frequency electromagnetic field
9, the main symptoms of welder pneumoconiosis are ().
A, shortness of breath B, expectoration C, chest tightness and chest pain D, dizziness
10, welding dust is different from general mechanical dust, its characteristic is ().
A, welding dust particles are very small
B, welding smoke temperature is high.
C, welding powder viscosity is small
D, welding powder has high viscosity.
Iv. true or false questions
1, general personal protective measures in addition to wearing work clothes, shoes, hats, gloves, glasses, masks, masks and other protective equipment, if necessary, you can use an air helmet mask. ( )
2. Pneumoconiosis refers to the disease of diffuse fibrosis of lung tissue caused by long-term inhalation of dust exceeding the prescribed concentration. ( )
3. The toxic gases produced by argon arc welding mainly include ozone and nitrogen oxides. ( )
4, carbon dioxide gas shielded welding arc is strong, will produce radioactivity. ( )
5. Wearing work clothes is one of the main measures to prevent arc radiation. ( )
6, when welding non-ferrous metal workpiece, should be ventilated detoxification, when necessary, the operator should wear a filter gas mask. ( )
7. Good grounding of the workpiece is one of the measures to protect the high-frequency electromagnetic field. ( )
8. The main function of welding goggles is to filter infrared rays and protect the welder's eyes from arc burns. ( )
9. Try to use thorium tungsten electrode with low radiation dose in TIG welding. ( )
10, the harm degree of noise to human body is related to frequency and intensity. ( )
1 1. When grinding thorium and tungsten electrodes on the grinder, a dust suction device must be installed, and dust shall not be discharged outdoors to pollute the atmosphere. ( )
12, all kinds of welding can produce carbon monoxide toxic gas, and the concentration of carbon monoxide produced by argon tungsten arc welding is very high. ( )
13, the generation of metal dust is mainly caused by the high temperature in the welding zone. ( )
14, electro-optic ophthalmia is caused by infrared rays in arc radiation. ( )
15. When an acute poisoning accident occurs, the discoverer shall immediately send out an alarm signal, notify the relevant person in charge, and get in touch with the medical and health institutions in time. ( )
16. When welding in a container containing nitrogen, it should be purged with compressed air first, and then the oxygen content can be input after analysis. ( )
17. The radioactive source of electric welding mainly comes from thorium tungsten electrode used in TIG welding and plasma welding. ( )
18, carbon monoxide poisoning may occur if you feel dizzy and headache during carbon dioxide gas shielded welding. ( )
19, welding and cutting workplaces, due to arc radiation, slag splashing, affecting the surrounding line of sight, should set up arc protection screen, protection screen should be made of incombustible materials, its surface should be painted with black or dark gray paint, the height should not be lower than 1.8m, and the lower part should have a gap of 25cm for circulating air. ( )
20, arc gouging in indoor or container operation, the internal size can't be too narrow, must strengthen the ventilation and smoke exhaust measures, and supervision by designated personnel. ( )
Reference answer
2. 1, B 2, B 3, C 4, A 5, A 6, C 7, B 8, C 9, C 10, a1,B 12, c/kloc-
Three. 1，ABCD 2，ABCD 3，ABD 4，ABC 5，ABD 6，AC 7，AC 8，ABCD 9，ABC 10，ABD。