Second, multiple choice questions:
1, please list from the following phenomena related to the definition of false death: (1) breathing, no heartbeat (2) no respiration (3) no respiration, heartbeat (4) no heartbeat (5) no other fatal trauma
Answer: ②, ③, ④
2, the two first aid methods (1)1min (2)30s (3)10min (4)3min (5)15s (6)5min
Answer: ④
3. When two first-aid methods are used alternately within 15s, choose two of the following to form a group: (1) artificial respiration (2) artificial respiration (3) artificial respiration (4) artificial respiration (5) artificial respiration (6) artificial respiration (7) artificial respiration (7) artificial respiration (8) artificial respiration (9) artificial respiration (10) artificial respiration (12) artificial respiration (12) artificial respiration (13) artificial respiration (13) artificial respiration (14) artificial respiration (3) Artificial respiration three times (4) Chest compression 10 times (5) Chest compression 15 times (6) Chest compression 5 times
Answer: (3), (5)
4. Resuscitation should be carried out immediately after disconnecting from the power source, please point out that the following resuscitation places are correct: (1) Carry to a warm place to resuscitate (2) Move to a ventilated place to resuscitate (3) Resuscitate at the scene in situ
Answer. (3)
5, the electrocuted person falls from a high place has not yet landed, the emergency `relief methods are: (1) in the fall on a soft cushion (2) quickly with the thatched cloth to support the catch (3) quickly to meet up to the catch it (4) immediately to meet up to the horizontal push a hand (5) immediately to support the protective net to catch it
Answer: (4)
6, from the following content to pick out which is the first aid in electrocution (2) (4) (6) (8) (9) (10)
7, artificial grounding body can be used as a grounding body of those of the following materials: (1) water pipe (2) aluminum stranded wire (3) multi-stranded copper stranded wire (4) a single stranded copper wire (5) steel (6) copper braided flexible wire (7) flat iron (8) sheathed wire (9) steel-core aluminum stranded wire (10) cables
Answer: (3) (5) (7)
8 strong> Fill in the blanks
1, electrical accidents can be divided into: personal accidents and equipment accidents.
2, current damage to the human body can be divided into two categories of electric shock and electric injury.
3, ? Electric shock? Is the current directly through the body to cause injury.
4,? Electrical injury? Is the conversion of electrical energy into other forms of energy to the human body caused by the injury.
5, lightning strike, can be divided into direct lightning strike, induction lightning strike.
6, it is generally believed that 1mA of current through the body, there will be a feeling of electric shock.
7. It is generally believed that not more than 10mA of industrial frequency current through the human body, will not lose the ability to get rid of.
8, it is generally believed that more than 50mA of industrial frequency current through the human body, can cause ventricular fibrillation.
9, the form of electric shock can be divided into: direct hit electric shock, electric shock and accidental electric shock.
10, the grounding device to withstand the ground current, in 20m from the grounding device, step voltage is approximately zero.
11, to avoid causing damage from lightning strikes, there are ways to: install flashover and direct grounding on the building; can not be directly grounded overhead lines can be added to the lightning conductor grounding.
12, a lightning discharge, the current can reach hundreds to thousands of kA.
13, electrical accidents can be divided into current injuries, electromagnetic injuries, electrostatic injuries and lightning injuries.
14, in the search for ground fault points, staff should wear insulated boots.
15, the possible existence of residual charge equipment, inspection or test should be discharged before.
16, electrocuted people breathing and heart stop, such as single rescue, artificial respiration and chest heart squeeze should be alternated, every 15s ~ 20s alternately.
17, for adults, the depth of extrathoracic cardiac compression, to 3 ~ 5cm is appropriate, the number of times per minute extrusion for 60 ~ 80 times.
18, in a year, electrocution accidents occur more months are divided into June to September.
19, on the operator himself, and on the safety of others and the equipment has a major hazardous factors of the operation, known as special operations.
20, for special operators, must carry out professional safety and technical training, after passing the examination, can be allowed to operate on duty.
21, the code of ethics for electricians is; (1) finally professional responsibility (2) to comply with professional discipline (3) the exchange of electrician's professional skills and safety techniques, (4) solidarity and cooperation.
22, safe use of electricity, that is, to make all electrical equipment in good condition.
23, electricity safety, is to take all necessary measures to avoid the occurrence of personal electric shock accident.
24, the occurrence of personal accidents and equipment accidents, most of which are caused by illegal operation.
25, the use of unqualified electrical products or materials in electrical equipment, may cause serious consequences.
26, through the human body of the effective value of the frequency current of about 1mA will have the feeling of electric shock, said this value for the perception of the current.
27, if the electrocuted person has not yet been removed from the power supply, the rescuer can not directly contact the body, should try to make it as soon as possible from the power supply, and to prevent secondary injuries to the electrocuted person.
28, the severity of the human body after electrocution and the size of the voltage through the body current, the path of the current flow, the frequency of the current, time and human condition.
29, through the human body of the effective value of the industrial frequency current does not exceed 10mA, will not lose the ability to get rid of the autonomy, said that this value is to get rid of the current.
30 The effective value of the current through the human body reaches 500mA, it may cause ventricular fibrillation, which is the main cause of electric shock injury.
31, mouth-to-mouth (nose) artificial respiration, should make the electrocuted person's head as far as possible backward, and discharge foreign objects in the mouth.
32, artificial respiration operation, about each blow 2S relaxation 3S, the operation should be able to see the electrocuted person's chest rise and fall.
Fourth, judgment questions:
1, the current through the human body, not necessarily feel electrocuted. (?)
2, the current through the body, there must be electric shock feeling. (?)
3. There is no danger of electrocution from a step voltage shock. (?)
4, step voltage electric shock, there is also a danger of electric shock. (?)
5. Residual charge electric shock, also a fatal danger. (?)
6. Residual charge electric shock, there is no fatal danger. (?)
7, Static electricity are harmful. (?)
8, the zero line in a three-phase, four-wire distribution system, its potential to ground is sometimes not zero. (?)
9, more than half of the electrocution accidents, is the violation of operating procedures. (?)
10, for the larger capacity of electrical equipment for or overhaul, after the exit of the operation, should be discharged first, after the operation . (?)
11, it is generally believed that the current below 1ma through the human body, there will be no electric shock feeling. (?)
12, the current through the body, to the left hand to the feet of the pathway of the greatest danger. (?)
13, repair incandescent lamp electrocution, can pull the pull-wire switch related to it, so that it is off the power supply. (?)
14, electrical equipment accidents may also cause secondary accidents. (?)
15, Induced lightning strikes are not fatal to people. (?)
16, electrostatic shock, no fatal danger to people. (?)
17, the value of the safety voltage, is man-made regulations. (?)
18, electrostatic shock, no fatal danger to people. (?)
19, the value of the safety voltage, is man-made regulations. (?)
20, insulated gloves and insulated shoes in high and low voltage operations, can be used as a basic insulating safety equipment. (?)
21, there is no danger of direct contact with the zero line of a single-phase circuit during electrified work. (?)
22. The switch with a distinct disconnect point controlling the equipment is pulled and the current indicator lamp is extinguished, the equipment can be considered to be de-energized and scheduled for service. (?)
23, in electrified work, the human body and the grounded part should maintain a safe distance. (?)
24, ascent operation, electrician aluminum ladder rubber pads are used for insulation. (?)
25, can be applied to low-voltage tester to determine the type of power supply voltage. (?)
26, protective insulation is the insulation required to ensure the normal operation of the equipment. (?)
27, where the equipment is reinforced insulation, can no longer be grounded or connected to the zero line. (?)
28, regardless of whether the high-voltage equipment is insulated or not, screen protection measures are taken. (?)
29, screen protection devices have permanent screen protection devices and temporary screen protection devices. (?)
30, leakage protector according to the working principle is divided into residual current action type and current action type. (?)
31, voltage leakage protector for direct contact electric shock does not protect. (?)
32, under normal circumstances, the primary current vector sum is zero, and there is no induced current on the secondary coil of the residual current transformer. (?)
33, current action type earth leakage protector does not need a special grounding wire. (?)
34, current-acting earth leakage protector can not prevent indirect contact electric shock. (?)
35, the selection of leakage protector only need to consider the normal leakage current of electrical equipment on the leakage protector. (?)
36, leakage protection can replace the zero protection. (?)
37, in the TN system or TT system leakage protector load side of the working zero line to ground insulation. (?)
38, in the TN system, repeated grounding can only be connected to the leakage protector power side. (?)
39, earth leakage protection can be used as the only direct contact protection. (?)
40, leakage protection should be used in conjunction with other protective measures, in order to provide effective protection against electric shock and other accidents. (?)
41, the discharge of static electricity, is the only way for static electricity to disappear. (?)
42, flashover discharge along the solid surface is a kind of electrostatic discharge. (?)
43, causing explosions and fires are the most serious hazards of static electricity. (?)
44, simply eliminate static electricity on the conductor grounding, its grounding resistance 1000? can be. (?)
45, the installation of leakage protector, should be divided into input and output terminals, but do not have to distinguish between fire and zero terminals. (?)
46, used for important equipment leakage protector, in order to reduce the power outage caused by false action, its action time is 0.22s. (?)
47, fire and explosion sometimes occur separately, sometimes both occur simultaneously. (?)
48, the higher the flash point of the liquid, the greater the risk of fire and explosion. (?)
49, electrical fires after cutting off the power supply, electrical fire fighting equipment should be used to extinguish the fire. (?)
50, the lower the ignition temperature of the material, the greater the risk of fire and explosion. (?)
51, fire hazardous environment is divided into 21, 22, 23 areas. (?)
52, combustible substances, combustion-assisted substances, the source of ignition of the three conditions exist at the same time, and interact with each other, can cause combustion. (?)
53, combustible substances can burn after contact with the ignition source, remove the ignition source, can continue to burn for the ignition. (?)
54, after the fire, the key to extinguish the fire is to ensure the supply of combustible and combustion-assisting substances. (?)
55, water and dry sand can be used for electrical fire suppression. (?)
56, fire, explosion hazardous environment within the metal piping of electrical equipment, should be allowed as a protective ground or protective zero line. (?)
57, fire, explosion hazardous environment within the metal piping of electrical equipment, must be protected to zero. (?)
58, foam extinguishing agent can be used for electrical fire suppression. (?)
59, air, oxygen is a combustion-inducing substances for electrical fires. (?)
60, the occurrence of electrical fires in electrical equipment, may still be charged. (?)
61, the occurrence of electrical fires, so that the insulation of electrical equipment is damaged, the earth charged, may produce dangerous step voltage and contact voltage. (?)
62, in the fire, explosion hazardous environment of electrical equipment, can choose general electrical products. (?)
63, fire-resistant electrical products for fire hazardous places. (?)
64, explosion hazardous environment within the junction box of electrical equipment, should be explosion-proof or explosion-proof type. (?)
65, fire and explosion hazardous environments within the wooden distribution board, regardless of current size, should be wrapped in iron. (?)
66, cut off the power supply, different phase lines should be in different locations, and cut off the phase. (?)
67, flammable, explosive gas, liquid piping is not allowed as a natural grounding body. (?)