OBJECTIVE TYPE QUES

OBJECTIVE TYPE QUES.

–Submitted by

PETROLEUM REFINING

Sunil Kumar (2014uch1530) Date – 17/02/2017

1.

2.

3.

4.

5.

6.

Which of the following properties is enhanced by using HYDROTREATING? (d) a) Cetane number b) Smoke point c) Density d) All of the above Which catalyst is used to remove sulphur impurities and saturate olefin in Hydrotreating? (c) a) Nickel molybdenum b) Alumina c) Cobalt molybdenum d) V2O5 Kerosene have 0.84 Specific gravity. Find it in degree API? (a; Used formula: deg. API= 141.5/Sg 131.5). a) 36.95 b) 36.66 c) 38.55 d) 34.44 If diesel has cetane number of 50 then the diesel index will be? (c; formula used: D.I.= (C.N.-10)/0.72) a) 36 b) 46 c) 56 d) 66 Thermal viscosity of phenol at 20 degree Celsius? Given kinetic viscosity is 4*10-4 m2/sec (a; used formula: T.V=15+148*K.V) a) 15.06 b) 16.32 c) 12.45 d) 16.06 Aviation Fuel Contains? (c) a) Light Naphtha b) Medium Naphtha c) Kerosene d) Diesel

7.

Why is it important to have high recycle ratio of hydrogen in Hydrotreator units? (b) a) To increase the inlet temperature of the reactor. b) To prevent coke laydown and catalyst poisoning. c) To increase the inlet pressure of the reactor. d) None of the above

8.

Which of the following statement is not true in case of Hydrotreating? (c) a) It is used to remove sulphur and nitrogen impurities from fractions obtained in CDU. b) It is used to enhance cetane number of diesel. c) The major reaction occurring in the reactors is hydrodealkylation. d) It is used to produce cleaner fuels.

9.

Which of the crude has higher sulphur content? (c) a) Assam crude b) Gujarat crude c) Rajasthan crude d) Bombay high crude

10. If a Gasoline have Performance Number of 160. Calculate Octane Number?. (c; used formula: O.N=100+(P.N-100)/3). a) 150 b) 160 c) 120 d) None of these 11. Kerosene contains 60% paraffin’s 30%n naphthenes & 10% aromatics. How much smoke point is? (d; Used formula: Smoke point= .48P+.32N+.20A) a) 0.444 mm b) 0.450 mm c) 0.359 mm d) 0.404 mm 12. Which catalyst is used to remove nitrogen impurities and saturate aromatic in Hydrotreating? (a) a) Nickel molybdenum b) Alumina c) Cobalt molybdenum d) V2O5 13. Which of the following is not a type of reaction occurring in Hydrotreating? (c) a) Hydrogenation b) Denitrogenation c) Hydrodealkylation d) Aromatic saturation 14. Sulphur impurities in Hydrotreator Units is removed as _______(b) a) H2S b) SO2 c) Mercaptans d) None of these 15. Which of the following is not true for Batch Caustic Wash? (d) a) Primarily for removing trace amounts of hydrogen sulfide and methyl and ethyl mercaptan. b) Disposing of spent caustic can be a major consideration. c) Relatively high caustic consumption per gallon of product. d) None of these 16. A Gasoline have 230 kcal/kg gross calorific value and also 23% volume Hydrogen content. Calculate net calorific value of Gasoline? (a; Used formula: CN=CG-4.7*V) a) 228.92 Kcal/kg b) 338.44 kcal/kg c) 239.44 Kcal/kg d) None of these. 17. Major source of propylene in a refinery is? (c) a) Catalytic reforming b) Visbreaking c) Fluidised bed catalytic cracking d) Iso craking process

18. Propane in petroleum refining is used for the removal of? (a) a) Asphalt b) Wax c) Sulphur compound d) Aromatics

19. Estimate the viscosity of phenol by Thomas method. Given that sg=0.856 at 400C and Tc=626.5K? ( d; Used Formula: log(8.569*µ/sg(.5))=θ*(1/Tr-1)) a) 2.228cp b) 0.228cp c) 2.288cp d) 0.288cp 20. As per the Bharat II norms for gasoline the benzene content should be? (a) a) 1 percent b) 2 percent c) 3 percent d) 4 percent