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1-Hydrocarbon of crude oils including alkanes, cycloparaffins, alkenes and aromatic compounds. ( )
2-Thiophene, sulfides are examples of non-acidic sulfur compounds found in crude fractions. ( )
3-The pour point is the lowest temperature at which the oil is observed to flo ( )
4-A low API gravity indicates a lighter crude oil or a petroleum product. ( )
5-Indole is one of the basic nitrogen compounds occur in crude oils. ( )
6-The Branched paraffins that possess higher octane numbers than straight chain paraff ( )
7-the crude oil may be considered Sour if it has amounts of sulfur 0.5 – 0.8 wt %. ( )
8-Fire point is the temperature well above the flash point where the product could catch fire. ( )
9-If the value of correlation index equal 20 indicate that the paraffin hydrocarbons in the fraction. ( )
10-In vacuum distillation, reduced pressures are applied to cracking long-chain hydrocarbons. ( )
11-The higher the reflux ratio, the better the separation of the mixture. ( )
12-Molecular sieve 5A selectively adsorbs n-paraffins from a low octane naphtha fraction. ( )
13-Liquid butane deasphalting removes asphaltic materials from heavy lube oil base stocks. ( )
14-Conversion processes used to reduce harmful impurities in petroleum fractions and residues. ( )
15-Petroleum means ‘oil rock’, ‘petra’ (meaning ‘oil) and ‘oleum’ (meaning ‘rock’’). ( )