2539. High aniline point of a petrofuel (say diesel) indicates that
it is highly aromatic in nature.
it is highly paraffinic in nature.
it has a very low diesel index.
its ignition quality is very poor.
✅ The correct answer is option B.
2544. Presence of aromatics in
diesel increases its cetane number.
kerosene increases its smoke point.
petrol increases its octane number.
all (a), (b) and (c).
✅ The correct answer is option C.
2553. Smoke point of a good burning kerosene may be around __________ mm.
0-5
20-25
60-75
100-120
✅ The correct answer is option B.
2558. 1 centistoke is equal to __________ Redwood I seconds.
1
4.08
0.408
40.8
✅ The correct answer is option B.
2563. Flash point of an oil gives an idea of the
nature of boiling point diagram of the system.
amount of low boiling fraction present.
explosion hazards.
all (a), (b) and (c).
✅ The correct answer is option D.
2568. Which of the following petroleum products contain minimum sulphur ?
Naphtha
Kerosene
LSHS
Furnace oil
✅ The correct answer is option A.
2498. Road grade bitumen is produced from vacuum residue by its
aeration
pyrolysis
hydrogenation
steam reforming
✅ The correct answer is option D.
2503. Naphthenic acid is a/an __________ compound.
sulphur
nitrogen
oxygen
none of these
✅ The correct answer is option C.
2508. Liquefied Petroleum Gas (LPG) in domestic use cylinders is in the liquid form. The density of LPG in liquid form is about __________ of that of water (i.e. 1 gm/c.c).
one fourth
one third
half
one eighth
✅ The correct answer is option C.
2513. Which of the following additives improves the cetane number of diesel ?
Amyl nitrate
Ethyl mercaptan
Napthenic acid
Tetra ethyl lead
✅ The correct answer is option A.