What will the gas station interview ask and how to answer it?

1. What are the two main components of oil? How are petroleum products classified?

A: Petroleum is mainly composed of carbon and hydrogen, of which carbon accounts for 83%-87%. The content of hydrogen is 1 1%- 14%. Petroleum products include fuels, solvents and chemical raw materials, lubricants and related products, wax, asphalt and coke.

2. What are the dangerous characteristics of oil products?

A: Flammability, explosiveness, volatility, leakage and electrostatic charge accumulation.

3. What are the physical and chemical parameters to measure the flammability of oil products?

Answer: flash point, ignition point and spontaneous combustion point.

4. What are the three necessary conditions for the burning of matter?

Answer: Combustible, combustion-supporting material and ignition heat source.

5. What is the basis for dividing gasoline brands? What is the basis of diesel brand classification?

Answer: gasoline is graded according to its octane number (the quality index to evaluate the antiknock performance of gasoline); Diesel oil is classified according to its freezing point (the highest temperature when oil is cooled to liquid level under experimental conditions is called the freezing point of oil).

6. What is the antiknock performance of gasoline?

Answer: When climbing a hill with full gasoline, it is sometimes found that the engine produces strong vibration and metal knocking, then the power drops, the car can't run, and the exhaust pipe emits black smoke. This is because the engine knocks, which is an abnormal combustion scene. Detonation is also called shock and sudden explosion. The ability of gasoline to prevent knocking when burning in a gasoline engine is called antiknock, which indicates the combustion performance of gasoline.