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Author name: Admin

2518. Sulphur content in lighter and heavier petroleum products is generally determined respectively by

lamp method and bomb method.

bomb method and lamp method.

bomb method and quartz tube method.

quartz tube method and lamp method.

✅ The correct answer is option B.

2523. The most important property for a jet fuel is its

viscosity

freezing point

calorific value

flash point

✅ The correct answer is option B.

2528. The pressure (kg/cm2 ) and temperature (°C) maintained in electrical desalters for crude oil are respectively

10 and 120

1 and 200

50 and 250

10 and 300

✅ The correct answer is option A.

2532. LPG when brought to atmospheric pressure & temperature will be a

liquid lighter than water.

liquid heavier than water.

gas lighter than air.

gas heavier than air.

✅ The correct answer is option D.

2535. Hydrogen content in petroleum products varies from 12 to 15% (by weight). As a result the difference between gross and net heating value of petroleum fuels varies in the range of __________ kcal/kg.

600-750

250-350

1000-1500

2000-2500

✅ The correct answer is option A.

2540. High aniline point of diesel indicates that, it

is highly aromatic.

has a large ignition delay.

is highly paraffinic.

has a low diesel index.

✅ The correct answer is option C.

2545. In the atmospheric pressure crude distillation, the content of __________ from lighter fraction to heavier ones.

sulphur increases

sulphur decreases

nitrogen decreases

none of these

✅ The correct answer is option A.

2549. For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm³ ), while the C.V. is same on weight basis (i.e., kcal/kg) ?

Propane and acetylene

Propane and LPG

Sewage gas and gobar gas

B.F. gas and coke oven gas

✅ The correct answer is option A.

2554. Which of the following gasolines (unleaded) has the least octane number ?

Catalytically cracked gasoline

Straight run gasoline

Catalytically reformed gasoline

Polymer gasoline

✅ The correct answer is option B.

2559. Nitrogen in coal

Is present upto 1-2%

Comes from protein in parent vegetable matter

Is recovered as ammonia during its carbonisation

All of the above

✅ The correct answer is option D.

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