2450. Flash point of an oil is determined by the
Pensky Martens apparatus.
Ramsbottom apparatus.
Saybolt viscometer.
Conradson apparatus.
✅ The correct answer is option A.
2454. Molecular weight of petrol may be about
40-60
100-130
250-300
350-400
✅ The correct answer is option B.
2419. Quinoline is a/an __________ compound.
sulphur
nitrogen
oxygen
none of these
✅ The correct answer is option B.
2424. Which of the following does not require preheating during storage in the storage tank as well as during atomisation through burners ?
PCM
Tar
Light diesel oil
Low viscosity furnace oil
✅ The correct answer is option C.
2430. Petrolatum is
same as petroleum ether.
petroleum coke.
a mixture of microcrystalline wax in viscous hydrocarbon liquids.
none of these.
✅ The correct answer is option C.
2437. A fuel oil consists of 4 fractions A, B, C and D. Their molar compositions and vapour pressures are given below : The vapour pressure of the fuel oil will be __________ mm Hg.
736
727.5
512
767.8
✅ The correct answer is option A.
2442. H/C ratio (by weight) for the same number of carbon atoms is the highest in case of
aromatics
paraffins
olefins
naphthenes
✅ The correct answer is option D.
2446. Smoke volatility index is equal to smoke point plus
0.42 x(% distilled at 204°C)
5 mm
0.84 x (% distilled at 204°C)
10 mm. approximately
✅ The correct answer is option A.
2451. Iso-octane is used as a reference substance in the definition of octane number and it is assigned an octane number value of 100. Iso-octance is chemically known as
α-methyl naphthalene.
2-2-4 tri methyl pentane.
1, 3 butadiene.
tetra methyl ethylene.
✅ The correct answer is option B.
2455. __________ test is done to find out the softening point of bitumen.
Impact
Ball and ring
Flame
Viscosity
✅ The correct answer is option B.