March 2019

Which of the following is not a sulphur compound present in petroleum ? A. Thiophenes B. Mercaptans C. SulphonesD. Pyrroles

Pour point of a petrofuel is________________? A. Multiple of 3°F B. Multiple of 5°FC. 5°C below the temperature at which oil ceases to flow D. None of these

Liquefied Petroleum Gas (LPG) in domestic use cylinders is in the liquid form. The density of LPG in liquid form is about ________________ of that of water (i.e. 1 gm/c.c)? A. One fourth B. One thirdC. Half D. One eighth

Higher pressure in the reforming reactor________________? A. Increases coke formation B. Increases the rate of reaction C. Produces high octane number gasolineD. None of these

_____________ base crude oil is also called asphaltic crude? A. ParaffinicB. Naphthenic C. Mixed D. Aromatic

The most suitable solvent for deasphalting vacuum residue is_____________________? A. PropaneB. Methyl ethyl ketone C. Doctor’s solution D. Methanol amine

Smoke point of kerosene is the_______________? A. Time after which smoking starts on burningB. Temperature at which smoking starts C. Maximum height of flame (in mm) without causing smoking, when burnt in a standard lamp D. None of these

Which of the following petroleum products contain minimum sulphur ? A. Naphtha B. Kerosene C. LSHS D. Furnace oil

Ethyl mercaptan is a/an ___________________ compound? A. Sulphur B. Nitrogen C. Oxygen D. None of these

The main purpose of recycling the byproduct hydrogen gas in the reformer reactor is to ____________________? A. Obviate catalyst poisoning B. Maintain the reaction temperatureC. Sustain the reactor pressure D. Hydrogenate the feed stock