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WorksheetsElectrical Safety Quiz
Total questions: 15
Worksheet time: 15mins
下列哪些设备不属于基本电气安全设备?
绝缘手套
绝缘棒
电压检测器
绝缘鞋
当电器起火时,首先应该做什么?
扑灭火
报警吧
切断电源
疏散
下列哪一个灭火器不适合扑灭电器大火?
二氧化碳灭火器
干粉灭火器
泡沫灭火器
六氟丙烷灭火器
当一个人触电时,哪条电流路径是最危险的?
从左手到脚
从右手到脚
从左手到右手
从左脚到右脚
我国规定的安全电压的额定值是多少?
42V, 36V, 24V, 12V, 6V
50V, 48V, 36V, 24V, 12V
48V, 36V, 24V, 12V, 6V
42V, 36V, 24V, 12V, 3V
What is the function of a residual current device?
To prevent voltage fluctuations
To prevent electric shock accidents
To prevent excessive charge
To prevent excessive current
When an electrical device uses a safety voltage above ( ) V, protective measures against direct contact electric shock must be taken.
12
24
36
42
When someone is found to be getting an electric shock, what should be done first?
Pull the person getting shocked with hands
Immediately call for help
Use an insulating object to separate the power source
Call 120
Which of the following phenomena is NOT an indication of electrical overload?
The wire gets hot
The fuse blows
The electrical device operates with an abnormal sound
The light bulb becomes brighter
What is the earth resistance tester used to measure?
Earth resistance
Insulation resistance
Current
Voltage
For measuring the insulation resistance of high - voltage electrical equipment, generally, a megohmmeter of ( ) should be used.
500V
1000V
2500V
5000V
Which of the following statements about electrical safety distance is INCORRECT?
The safety distance is to prevent the human body from touching or getting too close to the live part.
The safety distance has nothing to do with the voltage level.
The safety distance should consider factors such as the scope of work activities.
The requirements for safety distance are different in different environments.
The grounding of the electrical device's casing belongs to ( ).
Working grounding
Protective grounding
Lightning protection grounding
Safety grounding
Which of the following measures is INCORRECT for preventing electrostatic hazards?
Install a trailing iron chain at the rear of the oil tanker.
Make the aircraft tires with conductive rubber.
Incorporate stainless - steel fibers in the carpet.
Keep the room as dry as possible.
Which of the following statements about electrical maintenance safety is correct?
There is no need to cut off the power supply when maintaining electrical equipment.
Electrical maintenance work can be carried out by a single person.
Voltage testing must be carried out before maintenance.
There is no need to check the maintenance tools.
