PO 4.4

Auto-ignition temperature is the minimum temperature of a gas (vapor) air mixture at which it ignites without the influence of what?

• high-energy ignition source

• low-energy ignition source

• high-energy explosion source

• ignition source

The purpose of visbreaking is to obtain boiler fuel by lowering the viscosity of the feedstock___

• gasoline

• tar

• crude oil

• naphta

What is the temperature at which the product ignites when a flame is brought to it and continues to burn quietly for a certain period of time

• ignition temperature

• flash temperature

• explosion temperature

• all of them

What is the purpose of a control sample in determining iodine number?

• to determine the concentration of iodine in the sample

• to compare the results with expected values

• to identify impurities in the sample

• to measure the density of the sample

What is relative density?

• the density of a liquid oil product

• the weight of a liquid oil product

• the ratio of the true density of a liquid oil product to the density of distilled water at certain temperatures

• the volume of a liquid oil product

Quantitative determination of water content by the Dean and Stark method in accordance with the requirements:

• GOST 2477-65(2013)

• GOST 2477-65(2023)

• GOST 2477-65(1993)

• GOST 2477-65(2003)

What is the minimum temperature of a gas (vapor) air mixture at which it ignites without the influence of a high-energy ignition source?

• energy ignition source

• auto-ignition temperature

• flash point

• fire point

Device that is used to measure the density of substances in gaseous, liquid and solid states :

• areometer

• barometer

• pycnometer

• viscosymeter

What is the unit of kinematic viscosity commonly used in the oil and gas :

• stokes (St)

• centipoise (cP)

• pascal-seconds (Pa s)

• square feet per second (ft?/s)

Choose correct statement :

• the viscosity of oil and oil products decreases with increasing temperature

• the viscosity of oil and oil products increases with decreasing temperature

• the viscosity of oil and oil products decreases with decreasing temperature

• the viscosity of oil and oil products increases with increasing temperature