The process that allows a network to self-repair networks problems. The stations on the network notify the other stations on the ring when they are not receiving the transmissions. Beaconing is used in Token ring and FDDI networks.
Cetane number of diesel used in trucks may be about A. 50 B. 14 C. 35 D. 85
Paraffin base crude oil as compared to asphalt base crude gives A. higher yield of straight run gasoline. B. higher octane number gasoline. C. lower viscosity index lube oil. D. poorer yield of lube oil.
Catalyst used in the catalytic polymerisation is A. phosphoric acid on kieselghur B. aluminium chloride C. nickel D. vanadium pentaoxide
Which of the following is the most widely used cracking process in oil refineries ? A. Dubbs process. B. T.C.C. moving bed process. C. Fluidised bed catalytic cracking process. D. Houdry's fixed bed process.
Petroleum liquid fuels having flash point greater than 66°C is considered as safe during storage and handling. Which of the following has flash point > 66°C? A. Naphtha B. Petrol C. Kerosene D. Heavy fuel oil
Presence of aromatics in A. diesel increases its cetane number. B. kerosene increases its smoke point. C. petrol increases its octane number. D. all (a), (b) and (c).
The solvent used in Barisol dewaxing process is A. hexane B. furfural C. benzol and ethylene dichloride D. methyl ethyl ketone (MEK)
Choose the correct statement regarding thermal cracking. A. Moderate changes in operating temperature does not change the depth of cracking. B. Increased residence time results in the decreased severity of cracking. C. At low pressure, the yield of lighter hydrocarbons are more. D. Greater depth of cracking gives lower octane number gasoline.
A typical yield of diesel in straight run distillation of crude oil may be about __________ percent. A. 8 B. 18 C. 28 D. 35
Diesel index.(an alternative index for expressing the quality of diesel) is A. determined by using a test engine. B. not related to aniline point. C. equal to cetane number plus 3. D. all (a), (b) & (c).
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