When hierarchical routing is used, the routers are divided into what we will call regions, with each router knowing all the details about how to route packets to destinations within its own region, but knowing nothing about the internal structure of other regions.
The amount of tetraethyl lead added to improve the octane number of motor gasoline is around __________ c.c per gallon of petrol. A. 3 B. 300 C. 3000 D. 1000
Naphthenic acid is a/an __________ compound. A. sulphur B. nitrogen C. oxygen D. none of these
Glycol added to petrol acts as a/an __________ agent. A. anti-knocking B. anti-icing C. anti-gum forming D. dewaxing
Though increased pressure has a retarding effect on cracking reaction, yet in actual process, a positive pressure of 10-15 kgf/cm2 is maintained during cracking mainly to A. increase the yield of light distillates. B. suppress coke formation. C. enhance the octane number of gasoline. D. reduce gum content in gasoline.
Pick out the wrong statement. A. Higher specific gravity of petroleum products means higher C/H ratio. B. Aromatics have lower specific gravity than corresponding paraffins. C. Hydrocarbons of low specific gravity (e.g, paraffins) possess the maximum thermal energy per unit volume. D. Hydrocarbons of high specific gravity (eg, aromatics) possess the maximum thermal energy per unit weight.
Octane number of gasoline produced by two stage fluidised catalytic cracking process is A. 80 B. 87 C. 92 D. 97
The proper arrangement of the petroleum fractions in order of their boiling points is A. lubricating oil > diesel > petrol > LPG B. lubricating oil > petrol > diesel > LPG C. petrol > lubricating oil > diesel > LPG D. petrol > diesel > LPG > lubricating oil
Pick out the wrong statement. A. Iso-paraffin crack faster than n-paraf-fin. B. Catalytic cracking is endothermic, but the regeneration of catalyst is exothermic. C. Rate of decomposition of olefins in catalytic cracking is slightly slower than the thermal cracking. D. None of these.
Feedstock for the production of biodiesel is A. herbal plants B. used vegetable oils C. LSHS D. bagasse
Which one is used to determine the colour of petroleum products? A. Colour comparator B. Saybolt chromometer C. Cleveland apparatus D. None of these
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