Electrical Safety Quiz

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