Option A
Detergent is added as an additive in engine lubricating oil to A. reduce deposit formation. B. keep contaminants in suspension. C. increase oxidation stability. D. prevent rusting.
Crude oil is subjected to vacuum distillation in the last stage, because A. high boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may decompose. B. lighter/low boiling products are prone to thermal decomposition. C. high purity products can be obtained thereby. D. none of these.
Removal of light fractions from crude oil is called its A. sweetening B. dehydration C. stabilisation D. visbreaking
With increase in density, the viscosity of petroleum products A. increases B. decreases C. remains same D. either (a) or (b)
Operating temperature and pressure in catalytic reforming is about A. 1-5 Kgf/cm2 & 200°C. B. 15-45 Kgf/cm2 & 450-550°C. C. 50 - 75 kgf/cm2 & 600 - 800°C. D. 5-10 kgf/cm2 & 150 - 250°C.
A petroleum well is called 'dry', if it contains A. very little oil. B. no natural gas. C. only natural gas. D. all (a), (b) and (c).
Pick out the wrong statement. A. Lower boiling paraffins have higher octane number than higher paraffins. B. Dehydrogenation of naphthenes to aromatics is a desirable reaction in reforming process. C. The most ideal feedstock for thermal reforming is dearomatised kerosene. D. Catalyst used in catalytic reforming is platinum on silica-alumina base.
95% (by volume) of LPG at 760 mm Hg pressure will evaporate at __________ °C. A. 2 B. -40 C. 30 D. 55
Aniline point is the A. characteristic property of diesel & lubricating oils. B. measure of aromatic content of oil. C. both (a) and (b). D. neither (a) nor (b).
Choose the correct statement. A. Coking tendency increases with increasing molecular weight. B. Coking tendency decreases with increasing molecular weight. C. Higher pressure enhances coke formation. D. Coking is an exothermic reaction.
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