Lesson 2.8 from Syrym Nagibatora 2008

What pumps are used to pump light gas oil in delayed coking?

• Circulation pumps

• Submersible pumps

• Standby pumps

What helps to blow the product out of the furnace coils in delayed coking?

• Pumps

• Steam

• Water

During delayed coking with increased air supply to the instrumentation , the operation made of the installation is automatically adjusted.

• True

• False

During coking, furnace pumps are pumped with …

• Heavy gas oil

• LPG

• Light gas oil

What happens to all pumps when electricity is consumed?

• Switched off

•  Opened

• Removed

How much % productivity of the plant decreases in terms of raw materials in the delayed coking process?

• By 50%

• By 30%

• By 70%

What is the first step of the shutdown process of  the visbreaking process?

• Increase output of gas oil

• Increase the supply of liquid fuel and fuel gas to the injunctions

• Adjust the operation of continuous

For shutdown of hydrodesulfurization processes involve passing a high velocity hydrogen-containing gas over the fixed catalyst bed.

• True

• False

Select 3 main reasons when the shutdown is required in visbreaking

• The temperature of the raw materials; low boiling point of the cracked residue; the salinity in steam

• The flow of oil; the outlet of raw materials;

• Flow pollution by viscosities; fuel oil vacuum dispersion;

In what case are the usual procedures for stopping hydrodesulfurization unsatisfactory?

• Emergency shutdown

• PSD

• None of them