The most widely used crude topping column in refineries is the __________ column.

Crude topping column operates at __________ pressure.

A

Atmospheric

B

10 atm

C

Vacuum

D

3 atm

Crude oil is transported inland from oil field to refineries, mainly by the

A

Road tankers

B

Rail tankers

C

Underground pipelines

D

None of these

Which of the following is the most widely used cracking process in oil refineries?

A

Dubbs process

B

T.C.C. moving bed process

C

Fluidised bed catalytic cracking process

D

Houdry's fixed bed process

Sour crude means the __________ bearing crude.

A

Asphalt

B

Sulphur compounds

C

Wax

D

Nitrogen compounds

Crude oils containing more than __________ kg of total salts (expressed in terms of NaCl) per thousand barrel is called a 'salty crude'.

A

1

B

5

C

15

D

25

__________ base crude oil is also called asphaltic crude.

A

Paraffinic

B

Naphthenic

C

Mixed

D

Aromatic

Paraffin base crude oil as compared to asphalt base crude gives

A

Higher yield of straight run gasoline

B

Higher octane number gasoline

C

Lower viscosity index lube oil

D

Poorer yield of lube oil

The coking process normally mostly used in Indian oil refineries is the __________ coking process.

A

Delayed

B

Flexi

C

Fluid

D

Contact

The thickness of the topping of a ribbed slab, varies between

A

3 cm to 5 cm

B

5 cm to 8 cm

C

8 cm to 10 cm

D

12 cm to 15 cm

Main pollutants released from petroleum refineries is

A

CO, SO₂ & H₂S

B

CO₂, NO & SO₃

C

CO₂, H₂S & NO₂

D

SO₃, NO₂ & CO₂

The most widely used crude topping column in refineries is the __________ column.

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