chemical engineering petroleum refinery engineering MCQs – Page 3

Practise multiple-choice questions from chemical engineering petroleum refinery engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering petroleum refinery engineering Mcqs
101. Which parameter is used for the grading of paraffin waxes ?
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A. Penetration number

B. Viscosity

C. Specific gravity

D. Melting point

102. Absolute vapor pressure of petrofuels is found by Reid bomb which is heated in water bath to 100F. In Reid apparatus, the ratio of the volume of air chamber to that of the liquid fuel chamber is________________?
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A. 3

B. 1

C. 2

D. 4
103. Reid vapour pressure of gasoline is the measure of its_________________?
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A. Vapour locking tendency

B. Cloud point

C. Carbon residue

D. Pour point

104. Which of the following has the highest flash point of all ?
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A. Furnace oil

B. Petrol

C. Kerosene

D. Diesel

105. With increase in the molecular weight of aromatic present in kerosene, its smoking tendency ?
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A. Increases

B. Decreases

C. Remain same

D. Is unpredictable

106. Clay treatment is used to remove ___________________ ?
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A. Colour & dissolved gases from cracked gasoline

B. Salt from the crude oil

C. Wax from lube oil

D. None of these

107. In petroleum refining, the process used for conversion of hydrocarbons to aromatics is________________?
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A. Hydrotreating

B. Catalytic cracking

C. Alkylation

D. Catalytic reforming
108. Penetration test determines the _____________ of the grease?
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A. Service temperature

B. Lubricating properties (e.g. oilness)

C. Variation in viscosity with temperature

D. Stiffness
109. Which of the following has the lowest cetane number ?
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A. i-paraffins

B. Aromatics

C. Naphthene

D. Olefins

110. Platforming is a ____________ process?
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A. Regenerative

B. Non-regenerative & fixed bed

C. Fluidised bed

D. Moving bed

111. Which of the following is the easiest to crack ?
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A. Naphthenes

B. Olefins

C. Aromatics

D. Paraffins
112. Which of the following has maximum hydrogen/carbon ratio (by weight) ?
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A. Fuel oil

B. Gasoline

C. Diesel

D. Naphtha

113. Petroleum liquid fuels having flash point greater than 66C is considered as safe during storage and handling. Which of the following has flash point > 66C ?
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A. Kerosene

B. Petrol

C. Naphtha

D. Heavy fuel oil
114. Equal volumes of aniline and diesel oil when mixed at room temperature (during summer) was found to be completely miscible. It means that the aniline point of the diesel is _______________ the room temperature?
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A. More than

B. Same as

C. Either more or less; depends on the room temperature

D. Less than

115. The terminology used for the bottom most product from the vacuum crude distillation unit is______________?
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A. Petrolatum

B. Residual crude

C. Residuum

D. Reduced crude

116. Phenols are added in gasoline to____________________?
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A. Act as an antioxidant

B. Improve the octane number

C. Increase its pour point

D. Reduce its viscosity

117. Paraffins are desirable in lubricating oil, as it has got high_____________________?
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A. Smoke point

B. Viscosity index

C. Pour point

D. Viscosity

118. The most commonly used feed stock for the reforming reactor is ___________________?
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A. Residuum

B. Casing head gasoline

C. Heavy fuel oil

D. Straight run gasoline
119. Sweetening of petroleum product means the removal of ______________________?
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A. Wax

B. Sulphur & its compounds

C. Water

D. Organic impurities

120. Aniline point is a property of the__________________?
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A. LPG

B. Gasoline

C. Naphtha

D. Diesel

121. Solvent used for dewaxing of petroleum products are____________________?
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A. Furfural

B. Methyl ethyl ketone (MEK)

C. Propane

D. Both B. & C.

122. Reforming converts_________________?
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A. Naphthenes into aromatics

B. Naphthenes into paraffin

C. Naphthenes into olefins

D. Olefins into paraffins

123. Pick out the wrong statement about the smoking tendency of various hydrocarbon constituents of kerosene ?
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A. Smoking tendency of naphthenes decreases with its increasing molecular weight & also on

B. Smoking tendency of hydrocarbons increases in the order: paraffins ? isoparaffins ?

C. Smoking tendency of paraffins increases with decrease in its molecular weight

D. Smoking tendency of aromatics decreases with increase in its molecular weight

E. hthenes ? aromatics

F. ition of double bond

124. Olefins are_________________?
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A. Saturated hydrocarbons

B. Present in substantially good quantity in crude petroleum

C. Unsaturated cyclic compounds (hydrocarbons)

D. None of these
125. Cetane number of diesel used in trucks may be about __________________?
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A. 85

B. 14

C. 50

D. 35

126. ________________ treatment is done for appreciable improvement in viscosity index of lubricating oil?
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A. Alkali

B. Clay

C. Acid

D. Solvent extraction
127. Pressure & temperature maintained in catalytic cracking is about__________________?
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A. 50 atm & 750C

B. 2 atm & 500C

C. 10 atm & 500C

D. 30 atm & 200C

128. Ethyl mercaptan is added to the Doctor negative LPG for facilitating the detection of its leakage (by bad odour) to the extent of about ________________ ppm?
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A. 1

B. 5000

C. 50

D. 10000

129. Main boring diameter for petroleum well is 20-30 cms in diameter, while the depth of the oil well may be about _____________ kms?
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A. 1.5 to 4.5

B. 0.1 to 0.5

C. 15-20

D. 7.5 to 12.5

130. Which of the following processes consumes hydrogen ?
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A. Visbreaking

B. Fluid catalytic cracking

C. Propane deasphalting

D. None of these

131. Which of the following is a non-regenerative fixed bed catalytic reforming process ?
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A. Thermofor catalytic reforming

B. Hyperforming

C. Hydroforming

D. Platforming
132. Flash point of motor gasoline may be around ______________ C?
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A. 150

B. 100

C. 10

D. 45
133. Which of the following reactions is undesirable in the production of catalytically reformed gasoline ?
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A. Dehydrocyclization of higher paraffins

B. Isomerisation of paraffins

C. Dehydrogenation of lower paraffins

D. Dehydrogenation of Naphthene

134. The proper arrangement of the petroleum fractions in order of their boiling points is __________________ ?
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A. Petrol > lubricating oil > diesel > LPG

B. Petrol > diesel > LPG > lubricating oil

C. Lubricating oil > diesel > petrol > LPG

D. Lubricating oil > petrol > diesel > LPG

135. Which one is used to determine the colour of petroleum products ?
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A. Cleveland apparatus

B. None of these

C. Saybolt chromometer

D. Colour comparator
136. Raw Kerosene has a smoke point of 15 mm. After it is subjected to dearomatization by liquid SO2 extraction (Edeleanu process), its smoke point may become _______________________ mm?
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A. 10

B. 25

C. 5

D. 100

137. Tetra-ethyl lead is added in gasoline to ______________________?
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A. Reduce the pour point

B. Reduce gum formation

C. Increase its octane number

D. Increase its smoke point
138. Cetane number of alpha methyl naphthalene is assumed to be_________________?
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A. ?

B. 0

C. 100

D. 50

139. Water separometer index (modified) (WSIM) of a petrofuel is the measure of its____________________?
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A. Water absorbing capacity from atmosphere

B. Water separation characteristics

C. Water content

D. Emulsification tendency

140. Catalyst used in catalytic reforming is__________________?
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A. Iron

B. Nickel

C. Platinum on alumina

D. Aluminium chloride

141. Illuminating characteristics of kerosene is expressed by its_____________?
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A. Aniline point

B. Smoke point

C. Aromatic content

D. Luminosity number
142. Molecular weight of petrol may be about ____________________?
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A. 40-60

B. 100-130

C. 350-400

D. 250-300

143. Flash point of diesel/kerosene (>50C) is determined by the_______________?
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A. Saybolt chromometer

B. Abel apparatus

C. None of these

D. Pensky-Martens apparatus

144. Extractor temperature is maintained at -20C in Edeleanu process to reduce the ______________ of kerosene?
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A. Naphthenes

B. Aromatics

C. Smoke point

D. Paraffins
145. In solutizer sweetening process, solutizer solution used is_______________?
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A. Methanol in Unisol process

B. Naphthenic acid in Mercapsol process

C. Both A. and B.

D. Neither A. nor B.

146. The best method of determining sulphur in crude oil is by the _______________ method?
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A. Bomb calorimeter

B. Junkers calorimeter

C. Kjeldahl

D. Dumas

147. The solvent used in Barisol dewaxing process is_____________________?
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A. Hexane

B. Benzol and ethylene dichloride

C. Methyl ethyl ketone (MEK)

D. Furfural

148. Which of the following is used as a catalyst in fluidised bed catalytic cracking ?
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A. Silica-magnesia

B. Bentonite clays

C. Silica-alumina

D. All A., B. and C.
149. Smoke point of kerosene is the_______________?
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A. Maximum height of flame (in mm) without causing smoking, when burnt in a standard lamp

B. Temperature at which smoking starts

C. Time after which smoking starts on burning

D. None of these

150. Aniline point of high speed diesel may be about ____________ C ?
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A. 70

B. 150

C. 105

D. 35