Question Bank Source: Production Safety Simulation Examination Yitong Official Account Mini Program
022 Low Voltage Electrician Examination Questions are covered with high frequency test questions! The 2022 Low Voltage Electrician Examination questions and answers are based on the outline of the new version of the textbook for low voltage electricians. Low-voltage electrician simulation test questions can be practiced at any time according to the production safety simulation test.
, [Single choice question] () The instrument consists of a fixed coil , a rotatable coil and a rotating shaft, a hairspring, a pointer, a mechanical zeroing mechanism, etc. (C)
A, electromagnetic
B, magnetoelectric
C, electric
, [Single choice question] When forward voltage is applied to both ends of PN junction , its forward resistance () is added. (A)
A, small
B, large
C, unchanged
3, [Single choice question] The lines in general lighting places allow voltage loss to be the rated voltage (). (A)
A, ±5%
B, ±10%
C, ±15%
4, [Single choice question] Generally, the power supply for lighting is preferred ()V. (A)
A, 220
B, 380
C, 36
5, [Single choice question] multimeter is essentially a () instrument with rectifier . (A)
A, magnetoelectric
B, electromagnetic
C, electric
6, [Single choice question] The multimeter consists of three main parts: the table header, () and conversion switch . (A)
A, measurement circuit
B, coil
C, pointer
7, [Single choice question] In the three-phase AC circuit, phase A is marked with () color. (B)
A, red
B, yellow
C, green
8, [Single choice question] There are two types of starting methods for three-phase cage asynchronous motors, both direct startup and () startup under the rated voltage. (C)
A, rotor string frequency sensitive
B, rotor string resistance
C, reduce start voltage
9, [Single choice question] The following materials cannot be used as wires (). (B)
A, copper stranded
B, steel stranded
C, aluminum stranded
0, [Single choice question] Among the following lamps, the highest power factor is (). (A)
A, incandescent lamp
B, energy-saving lamp
C, fluorescent lamp
1, [Single choice question] Low-voltage fuses are widely used in low-voltage power supply and distribution systems and control systems. They are mainly used for () protection, and sometimes can also be used for overload protection. (B)
A, quick break
B, short-circuit
C, overcurrent
2, [Single choice question] When using bamboo ladder, the angle between the ladder and the ground should be ()°. (B)
A, 50
B, 60
C, 70
3, [Single choice question] Components with anti-time limit ampere-second characteristics have short circuit protection and () protection capabilities. (C)
A, mechanical
B, temperature
C, overload
4, [Single choice question] The principle of using AC contactor for undervoltage protection is that when the voltage is insufficient, the coil is insufficient and the contact is broken. (A)
A, magnetic force
B, eddy current
C, heat
5, [Single choice question] In uniform magnetic field , when the magnetic flux through a certain plane is the maximum, this plane is the same as magnetic line (). (B)
A, parallel
B, vertical
C, oblique
6, [Single choice question] In the insulation inspection of each winding of the 380V motor, it was found that insulation resistance () was found, and it can be preliminarily determined that motor was caused by moisture, and the motor should be dried.(C)
A, greater than 0.5MΩ
B, less than 10MΩ
C, less than 0.5MΩ
7, [Single choice question] In flammable and explosive dangerous places, electrical equipment should be installed with () electrical equipment. (C)
A, good sealing
B, safe voltage
C, explosion-proof
8, [Single choice question] Lighting fixtures used in flammable and explosive places should use () lamps. (A)
A, explosion-proof
B, moisture-proof
C, ordinary
9, [Single choice question] When selecting the sensitivity of leakage protection device , it is necessary to avoid unnecessary actions caused by normal () that affect normal power supply. (A)
A, leakage current
B, leakage voltage
C, leakage power
0, [Single choice question] ampere rule is also called (). (C)
A, Right-hand rule
B, Left-hand rule
C, Right-hand spiral rule
1, [Single choice question] For comatose patients, if they find a foreign object in their mouth, they should (). (A)
A. Clean foreign objects in the mouth, open the respiratory tract
B. Open the mouth widen, expand the airway
C. Ignore it, continue to rescue
D. Stop rescue
2. [Single choice question] Check the insulation of each winding of the motor. If the insulation resistance is measured to be zero, and when there is no obvious burning, it can be dried. At this time, () is powered on and run. (B)
A, allow
B, do not allow
C, after drying,
3, [Single choice question] Electrical machinery equipment () for construction sites are installed with leakage protection devices. (B)
A, should not
B, should
C, without specified
4, [Single choice question] When opening the switch blade, if an arc occurs, should (). (A)
A, quickly pull open
B, immediately close
C, slowly pull open
5, [Single choice question] The electrical figure of circuit breaker is (). (A)
A,
B,
C,
6, [Single choice question] Fluorescent lamp belongs to () light source. (A)
A, gas discharge
B, thermal radiation
C, bio discharge
7, [Single choice question] When replacing and repairing electrical equipment, the best safety measure is (). (A)
A, cut off the power
B, stand on a stool to operate
C, wear rubber gloves to operate
8, [Single choice question] The protection characteristics of fuse are also called (). (B)
A, arc extinguishing characteristics
B, ampere-second characteristics
C, time-based
9, [Single choice question] The symbol of the fuse is (). (A)
A,
B,
C,
30, [Single choice question] Special operators must be at least () years old. (A)
A, 18
B, 19
C, 20
31, [Single choice question] When measuring resistance with a multimeter, connect the black meter pen to the power supply () in the meter. (C)
A, negative
B, two poles
C, positive
32, [Single choice question] Heat, electric spark or arc generated by current causes electrical fire and explosion (C)
A, indirect cause
B, accidental cause
C, direct cause
33, [Single choice question] The electrical industry safety work regulations stipulate that if the ground voltage is ()V or below, safe production simulation examination is passed, and the equipment is a low-voltage equipment.(C)
A, 380
B, 400
C, 250
34, [Single choice question] As the path of the motor magnetic flux, the motor () requires that the material has good magnetic permeability. (C)
A, end cap
B, machine base
C, stator iron core
35, [Single choice question] When the motor is running under a rated working state, the mechanical power of () is called the rated power. (B)
A, allow input of
B, allow output of
C, push motor
36, [Single choice question] capacitor belongs to the () device. (C)
A, sports
B, dangerous
C, stationary
37, [Single choice question] What kind of fire extinguishing equipment can only be used to extinguish the oil fire in the cable trench (B)
A, carbon dioxide
B, foam cover
C, dry powder
38, [Single choice question] The phase line should be connected to the () of screw head . (A)
A, center terminal
B, thread terminal
C, shell
39, [Single choice question] Insulated safety tools are divided into () safety tools and auxiliary safety tools. (C)
A, indirect
B, direct
C, basic
40, [Single choice question] Insulated gloves are () safety tools. (B)
A, direct
B, auxiliary
C, basic
41, [Single choice question] relay is an automatic electrical appliance that controls the circuit "on" or "disconnect" according to (). (A)
A, external input signal (electrical signal or non-electrical signal)
B, electrical signal
C, non-electrical signal
42, [Single choice question] The specifications of the screwdriver are expressed by the length of the shaft outside the handle and (). (C)
A, thickness
B, radius
C, diameter
43, [Single choice question] The thread of the screw head should be connected to (). (A)
A, neutral line
B, phase line
C, ground line
44, [Single choice question] Current-carrying conductors will be affected by () in the magnetic field. (A)
A, electromagnetic force
B, magnetic flux
C, electromotive force
45, [Single choice question] protection gap in lightning arrester is mainly used for (C )
A, low-voltage high-current grid
B, high-voltage small-current grid
C, low-voltage small-current grid
46, [Single choice question] The anti-static grounding resistance requirements are not greater than ()Ω. (C)
A, 40
B, 10
C, 100
47, [Single choice question] The () voltage and step voltage generated by lightning current can directly cause people to be electrocuted and died. (B)
A, induction
B, contact
C, direct
48, [Single choice question] The luminous voltage of high-voltage electrical tester should not be higher than ()% of the rated voltage. (A)
A, 25
B, 50
C, 75
49, [Single choice question] The PH value of boiler feed water should be ____. (C)
A, ＜7
B, ＝7
C, ≥7
50, [Multiple choice question] Among the following statements about the basic regulations on construction drawings, the wrong one is (). (CD)
A. The general steps for drawing building construction drawings are: floor plan, elevation, section, detailed drawing
B. The general steps for drawing structural construction drawings are: foundation plan, foundation, detailed drawing, structural plan layout, detailed drawing. Question Bank Source: Production Safety Simulation Examination Yitong Official Account Mini Program 022 Low Voltage Electrician Examination Questions are covered with high frequency test questions! The 2022 Low Voltage Electrician Examination questions and answers are based on the outline of the new version of the textbook for low voltage electricians. Low-voltage electrician simulation test questions can be practiced at any time according to the production safety simulation test.
, [Single choice question] () The instrument consists of a fixed coil , a rotatable coil and a rotating shaft, a hairspring, a pointer, a mechanical zeroing mechanism, etc. (C)
A, electromagnetic
B, magnetoelectric
C, electric
, [Single choice question] When forward voltage is applied to both ends of PN junction , its forward resistance () is added. (A)
A, small
B, large
C, unchanged
3, [Single choice question] The lines in general lighting places allow voltage loss to be the rated voltage (). (A)
A, ±5%
B, ±10%
C, ±15%
4, [Single choice question] Generally, the power supply for lighting is preferred ()V. (A)
A, 220
B, 380
C, 36
5, [Single choice question] multimeter is essentially a () instrument with rectifier . (A)
A, magnetoelectric
B, electromagnetic
C, electric
6, [Single choice question] The multimeter consists of three main parts: the table header, () and conversion switch . (A)
A, measurement circuit
B, coil
C, pointer
7, [Single choice question] In the three-phase AC circuit, phase A is marked with () color. (B)
A, red
B, yellow
C, green
8, [Single choice question] There are two types of starting methods for three-phase cage asynchronous motors, both direct startup and () startup under the rated voltage. (C)
A, rotor string frequency sensitive
B, rotor string resistance
C, reduce start voltage
9, [Single choice question] The following materials cannot be used as wires (). (B)
A, copper stranded
B, steel stranded
C, aluminum stranded
0, [Single choice question] Among the following lamps, the highest power factor is (). (A)
A, incandescent lamp
B, energy-saving lamp
C, fluorescent lamp
1, [Single choice question] Low-voltage fuses are widely used in low-voltage power supply and distribution systems and control systems. They are mainly used for () protection, and sometimes can also be used for overload protection. (B)
A, quick break
B, short-circuit
C, overcurrent
2, [Single choice question] When using bamboo ladder, the angle between the ladder and the ground should be ()°. (B)
A, 50
B, 60
C, 70
3, [Single choice question] Components with anti-time limit ampere-second characteristics have short circuit protection and () protection capabilities. (C)
A, mechanical
B, temperature
C, overload
4, [Single choice question] The principle of using AC contactor for undervoltage protection is that when the voltage is insufficient, the coil is insufficient and the contact is broken. (A)
A, magnetic force
B, eddy current
C, heat
5, [Single choice question] In uniform magnetic field , when the magnetic flux through a certain plane is the maximum, this plane is the same as magnetic line (). (B)
A, parallel
B, vertical
C, oblique
6, [Single choice question] In the insulation inspection of each winding of the 380V motor, it was found that insulation resistance () was found, and it can be preliminarily determined that motor was caused by moisture, and the motor should be dried.(C)
A, greater than 0.5MΩ
B, less than 10MΩ
C, less than 0.5MΩ
7, [Single choice question] In flammable and explosive dangerous places, electrical equipment should be installed with () electrical equipment. (C)
A, good sealing
B, safe voltage
C, explosion-proof
8, [Single choice question] Lighting fixtures used in flammable and explosive places should use () lamps. (A)
A, explosion-proof
B, moisture-proof
C, ordinary
9, [Single choice question] When selecting the sensitivity of leakage protection device , it is necessary to avoid unnecessary actions caused by normal () that affect normal power supply. (A)
A, leakage current
B, leakage voltage
C, leakage power
0, [Single choice question] ampere rule is also called (). (C)
A, Right-hand rule
B, Left-hand rule
C, Right-hand spiral rule
1, [Single choice question] For comatose patients, if they find a foreign object in their mouth, they should (). (A)
A. Clean foreign objects in the mouth, open the respiratory tract
B. Open the mouth widen, expand the airway
C. Ignore it, continue to rescue
D. Stop rescue
2. [Single choice question] Check the insulation of each winding of the motor. If the insulation resistance is measured to be zero, and when there is no obvious burning, it can be dried. At this time, () is powered on and run. (B)
A, allow
B, do not allow
C, after drying,
3, [Single choice question] Electrical machinery equipment () for construction sites are installed with leakage protection devices. (B)
A, should not
B, should
C, without specified
4, [Single choice question] When opening the switch blade, if an arc occurs, should (). (A)
A, quickly pull open
B, immediately close
C, slowly pull open
5, [Single choice question] The electrical figure of circuit breaker is (). (A)
A,
B,
C,
6, [Single choice question] Fluorescent lamp belongs to () light source. (A)
A, gas discharge
B, thermal radiation
C, bio discharge
7, [Single choice question] When replacing and repairing electrical equipment, the best safety measure is (). (A)
A, cut off the power
B, stand on a stool to operate
C, wear rubber gloves to operate
8, [Single choice question] The protection characteristics of fuse are also called (). (B)
A, arc extinguishing characteristics
B, ampere-second characteristics
C, time-based
9, [Single choice question] The symbol of the fuse is (). (A)
A,
B,
C,
30, [Single choice question] Special operators must be at least () years old. (A)
A, 18
B, 19
C, 20
31, [Single choice question] When measuring resistance with a multimeter, connect the black meter pen to the power supply () in the meter. (C)
A, negative
B, two poles
C, positive
32, [Single choice question] Heat, electric spark or arc generated by current causes electrical fire and explosion (C)
A, indirect cause
B, accidental cause
C, direct cause
33, [Single choice question] The electrical industry safety work regulations stipulate that if the ground voltage is ()V or below, safe production simulation examination is passed, and the equipment is a low-voltage equipment.(C)
A, 380
B, 400
C, 250
34, [Single choice question] As the path of the motor magnetic flux, the motor () requires that the material has good magnetic permeability. (C)
A, end cap
B, machine base
C, stator iron core
35, [Single choice question] When the motor is running under a rated working state, the mechanical power of () is called the rated power. (B)
A, allow input of
B, allow output of
C, push motor
36, [Single choice question] capacitor belongs to the () device. (C)
A, sports
B, dangerous
C, stationary
37, [Single choice question] What kind of fire extinguishing equipment can only be used to extinguish the oil fire in the cable trench (B)
A, carbon dioxide
B, foam cover
C, dry powder
38, [Single choice question] The phase line should be connected to the () of screw head . (A)
A, center terminal
B, thread terminal
C, shell
39, [Single choice question] Insulated safety tools are divided into () safety tools and auxiliary safety tools. (C)
A, indirect
B, direct
C, basic
40, [Single choice question] Insulated gloves are () safety tools. (B)
A, direct
B, auxiliary
C, basic
41, [Single choice question] relay is an automatic electrical appliance that controls the circuit "on" or "disconnect" according to (). (A)
A, external input signal (electrical signal or non-electrical signal)
B, electrical signal
C, non-electrical signal
42, [Single choice question] The specifications of the screwdriver are expressed by the length of the shaft outside the handle and (). (C)
A, thickness
B, radius
C, diameter
43, [Single choice question] The thread of the screw head should be connected to (). (A)
A, neutral line
B, phase line
C, ground line
44, [Single choice question] Current-carrying conductors will be affected by () in the magnetic field. (A)
A, electromagnetic force
B, magnetic flux
C, electromotive force
45, [Single choice question] protection gap in lightning arrester is mainly used for (C )
A, low-voltage high-current grid
B, high-voltage small-current grid
C, low-voltage small-current grid
46, [Single choice question] The anti-static grounding resistance requirements are not greater than ()Ω. (C)
A, 40
B, 10
C, 100
47, [Single choice question] The () voltage and step voltage generated by lightning current can directly cause people to be electrocuted and died. (B)
A, induction
B, contact
C, direct
48, [Single choice question] The luminous voltage of high-voltage electrical tester should not be higher than ()% of the rated voltage. (A)
A, 25
B, 50
C, 75
49, [Single choice question] The PH value of boiler feed water should be ____. (C)
A, ＜7
B, ＝7
C, ≥7
50, [Multiple choice question] Among the following statements about the basic regulations on construction drawings, the wrong one is (). (CD)
A. The general steps for drawing building construction drawings are: floor plan, elevation, section, detailed drawing
B. The general steps for drawing structural construction drawings are: foundation plan, foundation, detailed drawing, structural plan layout, detailed drawing.
C. In the structural plan, the solid middle line is used to represent the profile line of the component that is cross-sectioned or visible, and the dotted middle line is used to represent the profile line of the invisible component. The door and window holes also need to be drawn
D. In the structural plan, the distribution ribs of of different specifications should also be drawn
E. The architectural elevation should lead to the length of the elevation from the plan, and measure the height of the elevation and the corresponding position of each part from the section view
51. [Judgement question] The current risk is the greatest. (×)
52. [Multiple choice question] The TT system is a system where the neutral point of the distribution network is directly grounded, and the housing of the electrical equipment also adopts grounding measures. (√)
53. [Judgement Question] Article 27 of the " of the People's Republic of China Safety Law" stipulates: Special operators of production and operation units must undergo special safety operation training in accordance with relevant national regulations and obtain corresponding qualifications before they can take up work. (√)
54. [Judgement Question] Current will form in the rotor conductor of three-phase asynchronous motor , and its current direction can be determined by the right-hand rule. (√)
55. [Judgement Question] There should be obvious differences between sockets with different voltages. (√)
56. [Judgement Question] In order to prevent electrical sparks, arcs and other igniting explosives, explosion-proof electrical equipment that is suitable for the environment should be selected. (√)
57. [Multiple choice question] For safety reasons, it is best to disconnect the load when replacing the fuse. (×)
58. [Multiple choice question] During artificial respiration, when blowing orally to adults, the frequency of blowing is 10-12 times per minute. (√)
59. [Multiple choice question] From the perspective of overload, the rated voltage of the fuse is specified. (×)
60. [Multiple choice question] Motors that use to change the pole logarithm to regulate the speed are generally wound rotor motors. (×)
61. [Judgement Question] The breaking current capability is one of the main technical parameters of various types of knife switches. (√)
62. [Multiple choice question] The main methods for fixing trauma bandage bandages include temporary hand hanging, large hand hanging, small hand hanging and other methods. (√)
63. [Multiple choice question] The bandaging movement should be gentle, the tightness should be appropriate, and the knot should not be hit on the wound. (√)
64. [Multiple choice question] The suspension of work by enterprises in the chemical industry must obtain a suspension order in advance, and the suspension order must be signed and approved by the main person in charge of the enterprise. (√)
65. [Multiple choice question] The distance between the chandeliers in indoor areas in dangerous places and the ground is no less than 3m. (×)
66. [Multiple choice question] When a fire occurs, the on-site practitioners should first rescue valuables and then use a fire extinguisher to extinguish the fire, rather than extinguish the fire first. (×)
67. [Multiple choice question] When the chandelier is installed above the table, the vertical distance from the table is no less than 1.5m. (×)
68. [Multiple choice question] Employees must wear and use labor protective supplies correctly when working. To prevent high-altitude operations from being damaged, you should wear high-altitude protective labor protection supplies. (√)
69. [Multiple choice question] Use red to indicate prohibition, stop or firefighting in the safety color mark. (√)
70. [Multiple choice question] After the power is off, the motor stops. When the power grid calls again, the operating mode where the motor can start on its own is called voltage loss protection . (×)
71. [Multiple choice question] In the protection of multi-stage fuses, the rated current of the post-stage melt is greater than that of the previous stage, and the front end is the power and safety production simulation test, and the source end are the front end. (×)
72. [Multiple choice question] If you are cut, if there is a foreign object, you should first remove the foreign object, and then ligate it in the direction close to the wound to be centrifuged and sterilize it with alcohol and then bandage it. (√)
73. [Multiple choice question] For staff working in places where flammable, explosive, burning and static electricity occur, chemical fiber protective supplies cannot be distributed or used. (√)
74. [Multiple choice question] Check the insulation of each winding of the motor. If the insulation resistance is measured to be unqualified, power-on operation is not allowed.(√)
75. [Multiple choice question] Check the lubrication of motor bearing . The motor shaft can be turned on and rotated to see if it rotates flexibly and hear whether it is abnormal. ’Safety Production Simulation Examination 1-point-to-pass’ (×)
76. [Multiple choice question] The socket installation height of children's activity places such as kindergartens and primary schools should not be less than 1.8m. (√)
77. [Multiple choice question] When the discharge spark energy of static electricity is large enough, it can cause fires and explosion accidents. During the production process, static electricity will also hinder production and reduce product quality. (√)
78. [Multiple choice question] During cardiopulmonary resuscitation, the speed of pressing the heart is about 100 times per minute. (√)
79. [Multiple choice question] The condition for successful first aid is fast action and correct operation. (√)
80. [Multiple choice question] handheld power tool wiring can be lengthened at will. (×)
81. [Judgement Question] Inspection is the process of organizing safety management personnel, engineering and technical personnel and other relevant personnel to investigate the hidden dangers of the unit, register according to the hidden danger level, and establish hidden danger information files. Sorting is the process of distinguishing the priorities and classifying hidden dangers according to the difficulty of rectification and management of hidden dangers and their impact scope. Elimination is the process of eliminating or controlling hidden dangers. (√)
82. [Judgement Question] Scaffolding, protective net, guardrail and other facilities that need to be erected in accordance with the specifications on site must comply with safety regulations. Before working at high places such as asbestos tiles, color steel tiles, and light sheds, engineering measures such as setting up stable and firm load-bearing plates must be taken. (√)
83. [Multiple choice question] Production employees must wear and use labor protection products correctly when working. Anti-static work clothes, anti-static shoes, etc. must be worn when working in flammable and explosive places. (√)
84. [Multiple choice question] When using an electric pen to check, the electric pen glows means that the line must be electrically active. (×)
85. [Judgement Question] When measuring current with clamp meter , try to place the wire in the middle of the jaw core to reduce measurement errors. (√)
86. [Judgement Question] The capacity of a capacitor is the capacity. (×)
87. [Multiple choice question] The discharge load of the capacitor cannot be equipped with fuses or switches. (√)
88. [Judgement Question] The handle of electrician knife is not insulating protection and cannot be cut on live wires or equipment to avoid electric shock. (√)
89. [Judgement Question] Before using electrician safety equipment, it must be carefully checked. For example, insulated gloves should be checked for scratches, cracks, bubbles, etc. (√)
90. [Judgement Question] The electrician symbol of electrolytic capacitor is shown in the figure.
(√)
91. [Multiple choice question] When the combination switch is selected as a direct control motor, its rated current is required to be 2 to 3 times the rated current of the motor. (√)
92. [Multiple choice question] The voltage when the insulator is broken down is called the breakdown voltage. (√)
93. [Multiple choice question] Insulation aging is just a chemical change. (×)
94. [Multiple choice question] Bandage fixing mainly includes temporary hand hanging, large hand hanging, small hand hanging and other methods. (√)
95. [Judgement Question] Trip immediately when power is transmitted by the distribution branch. The reason should be found out before sending it to avoid amplifying the accident. (√)
96. [Judgement Question] After major hidden dangers are treated, production, operation or use can be resumed only if it is evaluated to meet the conditions for safe production. If the regulatory authorities order all or partial suspension of production and business, the relevant review procedures must be carried out in accordance with the law. (√)
97. [Judgement Question] In the process of treating major hidden dangers, temporary preventive measures must be taken in accordance with the law to strictly prevent accidents. (√)
98. [Judgement Question] clamp ammeter can be made to measure both AC current and DC current. (√)
99. [Multiple choice question] Electricity verification is one of the technical measures to ensure the safety of electrical operations.(√)
00. [Multiple choice question] Yellow and green wires can only be used for protection wires. (√)
supports the test questions of precision low-voltage electrical work (new version) in all regions across the country, supports safety qualification certificate, special operation certificate , professional skills appraisal and other job question bank exercises.
(√)75. [Multiple choice question] Check the lubrication of motor bearing . The motor shaft can be turned on and rotated to see if it rotates flexibly and hear whether it is abnormal. ’Safety Production Simulation Examination 1-point-to-pass’ (×)
76. [Multiple choice question] The socket installation height of children's activity places such as kindergartens and primary schools should not be less than 1.8m. (√)
77. [Multiple choice question] When the discharge spark energy of static electricity is large enough, it can cause fires and explosion accidents. During the production process, static electricity will also hinder production and reduce product quality. (√)
78. [Multiple choice question] During cardiopulmonary resuscitation, the speed of pressing the heart is about 100 times per minute. (√)
79. [Multiple choice question] The condition for successful first aid is fast action and correct operation. (√)
80. [Multiple choice question] handheld power tool wiring can be lengthened at will. (×)
81. [Judgement Question] Inspection is the process of organizing safety management personnel, engineering and technical personnel and other relevant personnel to investigate the hidden dangers of the unit, register according to the hidden danger level, and establish hidden danger information files. Sorting is the process of distinguishing the priorities and classifying hidden dangers according to the difficulty of rectification and management of hidden dangers and their impact scope. Elimination is the process of eliminating or controlling hidden dangers. (√)
82. [Judgement Question] Scaffolding, protective net, guardrail and other facilities that need to be erected in accordance with the specifications on site must comply with safety regulations. Before working at high places such as asbestos tiles, color steel tiles, and light sheds, engineering measures such as setting up stable and firm load-bearing plates must be taken. (√)
83. [Multiple choice question] Production employees must wear and use labor protection products correctly when working. Anti-static work clothes, anti-static shoes, etc. must be worn when working in flammable and explosive places. (√)
84. [Multiple choice question] When using an electric pen to check, the electric pen glows means that the line must be electrically active. (×)
85. [Judgement Question] When measuring current with clamp meter , try to place the wire in the middle of the jaw core to reduce measurement errors. (√)
86. [Judgement Question] The capacity of a capacitor is the capacity. (×)
87. [Multiple choice question] The discharge load of the capacitor cannot be equipped with fuses or switches. (√)
88. [Judgement Question] The handle of electrician knife is not insulating protection and cannot be cut on live wires or equipment to avoid electric shock. (√)
89. [Judgement Question] Before using electrician safety equipment, it must be carefully checked. For example, insulated gloves should be checked for scratches, cracks, bubbles, etc. (√)
90. [Judgement Question] The electrician symbol of electrolytic capacitor is shown in the figure.
(√)
91. [Multiple choice question] When the combination switch is selected as a direct control motor, its rated current is required to be 2 to 3 times the rated current of the motor. (√)
92. [Multiple choice question] The voltage when the insulator is broken down is called the breakdown voltage. (√)
93. [Multiple choice question] Insulation aging is just a chemical change. (×)
94. [Multiple choice question] Bandage fixing mainly includes temporary hand hanging, large hand hanging, small hand hanging and other methods. (√)
95. [Judgement Question] Trip immediately when power is transmitted by the distribution branch. The reason should be found out before sending it to avoid amplifying the accident. (√)
96. [Judgement Question] After major hidden dangers are treated, production, operation or use can be resumed only if it is evaluated to meet the conditions for safe production. If the regulatory authorities order all or partial suspension of production and business, the relevant review procedures must be carried out in accordance with the law. (√)
97. [Judgement Question] In the process of treating major hidden dangers, temporary preventive measures must be taken in accordance with the law to strictly prevent accidents. (√)
98. [Judgement Question] clamp ammeter can be made to measure both AC current and DC current. (√)
99. [Multiple choice question] Electricity verification is one of the technical measures to ensure the safety of electrical operations.(√)
00. [Multiple choice question] Yellow and green wires can only be used for protection wires. (√)
supports the test questions of precision low-voltage electrical work (new version) in all regions across the country, supports safety qualification certificate, special operation certificate , professional skills appraisal and other job question bank exercises.
