One of two sub-layers of the data link layer of OSI reference model, as defined by the IEEE 802 standard. This sub-layer is responsible for maintaining the link between computers when they are sending data across the physical network connection.
Increase in the specific gravity of petroleum products indicates A. decrease in paraffin content. B. increase in thermal energy per unit weight. C. increase in aromatic content. D. higher H/C ratio.
'Solvent naphtha' used mostly as a solvent in paints and perfumery is produced by the __________ of virgin naphtha into small boiling range cuts. A. steam reforming B. distillation C. desulphurisation D. none of these
Methyl tertiary butyl ether (MTBE), a high octane (octane no. = 115) gasoline blending component is produced by the simple additive reaction of isobutylene with A. methyl alcohol B. ethyl alcohol C. methane D. ethane
The main aim of cracking is to produce A. gasoline B. lube oil C. petrolatum D. coke
LPG when brought to atmospheric pressure & temperature will be a A. liquid lighter than water. B. liquid heavier than water. C. gas lighter than air. D. gas heavier than air.
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.
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