1. In industrial production, what way does poison enter human body?

A: mainly through the respiratory tract and skin into the human body.

2. What are the three types of respirators?

Answer: it can be divided into three types: dust prevention, poison prevention and oxygen supply.

3. What is the applicable scope of the filter gas mask?

Answer: it is suitable for the air with oxygen concentration greater than 18% and toxic gas concentration less than 2%.

4. What are the four basic characteristics of the accident?

A:

Causation

Randomness

Latent

Preventability

5. What should be paid attention to when switching on and off high pressure valve?

A: when switching high-pressure valve, do not act too fast and too hard. The operator should stand on the side of the valve.

6. How to use the seatbelt correctly?

A: it should be high hanging and low use.

7. What is the cause of the fire of electrical equipment?

A: short circuit, overload, leakage and poor line contact.

8. What does "four not hurt" mean?

A: do not hurt yourself, do not hurt others, not be hurt by others, protect others from being hurt.

9. What is the effect on the human auditory organs when the noise exceeds 140 dB?

A: when the noise exceeds 140 dB, the human auditory organ will be prone to accidental injury, resulting in rupture and bleeding of tympanic membrane.

10. What voltage should be used for the internal maintenance or inspection of equipment and containers?

A: 12 volt safe voltage must be used.