Both asphalt and wax are produced by __________ base crude oils.

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

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

Which of the following test is used for distinguishing among dry oils, semi-drying oils and non drying oils?

A

Elaiden test

B

Reichart-Meissl value test

C

Henter value test

D

Iodine value test

Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its

A

Poor oxidation stability and high gum forming tendency

B

Greater tendency of decomposition at elevated temperature

C

Hydrolysis tendency in presence of water

D

All of the above

__________ base crude oil is also called asphaltic crude.

A

Paraffinic

B

Naphthenic

C

Mixed

D

Aromatic

Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl iso-butyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent has the advantages of the

A

Elimination of solvent drying facility

B

Higher nitration temperature

C

Lower solvent dilution ratio

D

All of the above

Vegetable oils contain large quantity of glycerides of unsaturated acids. When the vegetable oils contain high amount of saturated fatty acids, it is termed as __________ oil.

A

Drying

B

Semi-drying

C

Non-drying

D

None of these

Sour crude means the __________ bearing crude.

A

Asphalt

B

Sulphur compounds

C

Wax

D

Nitrogen compounds

Unsaturated oils compared to saturated oils have

A

Lower melting point & higher reactivity to oxygen

B

Higher melting point & higher reactivity to oxygen

C

Lower melting point & lower reactivity to oxygen

D

Higher melting point & lower reactivity to oxygen

Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils

A

Cause cholesterol build up and blood clotting

B

Are prone to rancid oxidation

C

Always contain some amount of nickel (as their complete removal is very difficult)

D

Have affinity to retain harmful sulphur compounds

Both asphalt and wax are produced by __________ base crude oils.

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