Packet filter is a standard router equipped with some extra functionality. The extra functionality allows every incoming or outgoing packet to be inspected. Packets meeting some criterion are forwarded normally. Those that fail the test are dropped.
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
Catalytic cracking compared to thermal cracking of residue of vacuum distillation of crude oil A. gives higher yield of petrol. B. lower octane number of petrol. C. higher sulphur content in the product. D. higher gum forming material in petrol.
Phenols are added in gasoline to A. improve the octane number. B. act as an antioxidant. C. reduce its viscosity. D. increase its pour point.
Which of the following is desirable in diesel and kerosene but is undersirable in gasoline? A. Aromatics B. Mercaptans C. Paraffins D. Naphthenic acid
Name the hydrocarbon having the poorest oxidation stability. A. naphthene B. olefin C. paraffin D. aromatics
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