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Author name: Admin

2658. Petroleum liquid fuels having flash point greater than 66°C is considered as safe during storage and handling. Which of the following has flash point > 66°C ?

Naphtha

Petrol

Kerosene

Heavy fuel oil

✅ The correct answer is option D.

2662. Stack (chimney) height in a big thermal power plant is dictated by the

Pollution control aspect

Draught to be created

Limitation of constructional facilities

None of these

✅ The correct answer is option B.

2667. True vapour pressure of a petroleum fraction __________ Reid vapour pressure.

is less than

is more than

is same as

may be either more or less than

✅ The correct answer is option B.

2671. Tolerable concentration of toxic carbon monoxide in atmospheric air is about __________ PPm.

50

1000

5000

10000

✅ The correct answer is option A.

2675. The main use of heavy gas oil produced by the vacuum distillation unit is as a

blending component for kerosene.

blending component for petrol.

feedstock for fluid catalytic cracking unit.

none of these.

✅ The correct answer is option C.

2680. Temperature of coke oven gas just before entering into saturator (for recovery of NH₃) is about __________ °C.

30

65

120

180

✅ The correct answer is option B.

2687. LPG stands for

liquid petroleum gas

liquified petrol gas

liquid petrol gas

liquefied petroleum gas

✅ The correct answer is option D.

2692. __________ is not an important refinery process for upgrading the quality of lubricating oil.

Deoiling

Solvent refinning

Clay treatment

Hydrotreatment

✅ The correct answer is option A.

2698. Which of the following accentuates clinker-ing trouble on furnace grate burning coal?

Low reactivity of carbonised residue containing high proportions of iron & sulphur

Low forced draught and fuel bed temperature

Thick fire bed and preheated primary air

All of the above

✅ The correct answer is option D.

2703. Maximum sulphur percentage in low sulphur heavy stock (LSHS) furnace oil is about

0.1

1

2.5

3.5

✅ The correct answer is option B.

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