21⟩ Which of the following is used as a catalyst in fluidised bed catalytic cracking? A. Silica-magnesia B. Silica-alumina C. Bentonite clays D. All (a), (b) and (c)
Option D
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340 Petroleum Engineering Questions And Answers
22⟩ Casing head gasoline is the liquid A. butane. B. propane. C. natural gas. D. gasoline separated from wet natural gas by compression.
Option A
23⟩ Most commonly used crude heater before the fractionation tower in a refinery is the __________ heater. A. electric immersion B. pipestill C. steam coil D. none of these
Option B
24⟩ Pour point and freezing point is equal for A. petrol B. diesel C. water D. crude petroleum
Option C
25⟩ Maximum sulphur percentage in low sulphur heavy stock (LSHS) furnace oil is about A. 0.1 B. 1 C. 2.5 D. 3.5
Option B
26⟩ Which of the following fractions of a crude oil will have the maximum gravity API (i.e. °API)? A. Diesel B. Gasoline C. Atmospheric gas oil D. Vacuum gas oil
Option C
27⟩ Flash point of an oil gives an idea of the A. nature of boiling point diagram of the system. B. amount of low boiling fraction present. C. explosion hazards. D. all (a), (b) and (c)
Option A
28⟩ Illuminating characteristics of kerosene is expressed by its A. smoke point B. aniline point C. luminosity number D. aromatic content
Option C
29⟩ Solvent used in duo-sol extraction for lube oil upgradation is a mixture of A. propane & phenol-cresol mixture. B. methyl ethyl ketone & glycol. C. phenol & furfural. D. propane & liquid sulphur dioxide.
Option A
30⟩ The octane number of aviation gasoline may be A. 79 B. 87 C. 97 D. >100
Option D
31⟩ For gasoline, the flash point (<50°C) is determined by the A. Abel apparatus. B. Pensky-Marten's apparatus. C. Saybolt chromometer. D. none of these.
Option D
32⟩ Flash point of atmospheric distillation residue is determined by __________ apparates. A. Pensky-Martens (closed cup type). B. Abel. C. Cleveland (open cup type) D. none of these.
Option C
33⟩ The colour of gasoline is an indication of its A. octane number. B. lead susceptibility. C. gum forming tendency & thoroughness of refining. D. none of these.
Option C
34⟩ __________ converts n-paraffins to i-paraffins. A. Alkylation B. Polymerisation C. Isomerisation D. none of these
Option C
35⟩ In the atmospheric pressure crude distillation, the content of __________ from lighter fraction to heavier ones. A. sulphur increases B. sulphur decreases C. nitrogen decreases D. none of these
Option A
36⟩ Catalytic desulphurisation process used for sweetening of straight run gasoline and kerosene uses __________ as catalyst. A. bauxite B. fuller's earth C. activated clay D. all (a), (b) & (c)
Option D
37⟩ True boiling point apparatus is used for the A. determination of characterisation factor. B. evaluation of oil stocks. C. determination of true vapour pressure. D. none of these.
Option D
38⟩ Flash point of motor gasoline may be around __________ °C. A. 10 B. 45 C. 100 D. 150
Option B
39⟩ __________ test is done to find out the softening point of bitumen. A. Impact B. Ball and ring C. Flame D. Viscosity
Option B
40⟩ Mercaptans are A. low boiling sulphur compounds. B. added in LPG cylinders to detect gas leakage by its smell. C. undesirable in petrol, as they reduce its octane number. D. all (a), (b) and (c)
Option D
