MCQOPTIONS
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MCQOPTIONS
This section includes 401 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
The catalytic cracking of heavier petroleum fraction is done to produce mainly |
| A. | gasoline |
| B. | asphalt |
| C. | diesel oil |
| D. | tar |
| Answer» D. tar | |
| 102. |
Char value of Kerosene is the amount of charred oil deposition on the wick obtained after burning it in a standard wick lamp at a standard rate for 24 hours. Char value of a good quality kerosene should be less than __________ mg/kg of kerosene. |
| A. | 1 |
| B. | 20 |
| C. | 100 |
| D. | 500 |
| Answer» C. 100 | |
| 103. |
A fuel oil consists of 4 fractions A, B, C and D. Their molar compositions and vapour pressures are given below :The vapour pressure of the fuel oil will be __________ mm Hg. |
| A. | 736 |
| B. | 727.5 |
| C. | 512 |
| D. | 767.8 |
| Answer» B. 727.5 | |
| 104. |
Removal of light fractions from crude oil is called its |
| A. | sweetening |
| B. | dehydration |
| C. | stabilisation |
| D. | visbreaking |
| Answer» D. visbreaking | |
| 105. |
Pick out the correct statement about catalytic polymerisation. |
| A. | H2SO4 polymerisation process gives gasoline rich in unsaturates. |
| B. | In H2SO4 polymerisation, H3PO4 is always used with 2% steam to prevent meta & ortho H3PO4 formation, which are inactive. |
| C. | both (a) and (b) |
| D. | neither (a) nor (b) |
| Answer» C. both (a) and (b) | |
| 106. |
During electrical desalting of crude oil, the electrical conductivity of a mixture of crude oil and water (which ranges between 3 to 8% water) __________ with increase in the amount of water. |
| A. | decreases |
| B. | increases |
| C. | remains unchanged |
| D. | decreases linearly |
| Answer» C. remains unchanged | |
| 107. |
Boiling range of motor gasoline is an indication of the |
| A. | case of starting |
| B. | rate of acceleration |
| C. | vapour locking tendency |
| D. | all (a), (b) and (c) |
| Answer» C. vapour locking tendency | |
| 108. |
'Solvent naphtha' used mostly as a solvent in paints and perfumery is produced by the __________ of virgin naphtha into small boiling range cuts. |
| A. | steam reforming |
| B. | distillation |
| C. | desulphurisation |
| D. | none of these |
| Answer» C. desulphurisation | |
| 109. |
Naphtha yield in straight run distillation of crude oil may be about __________ percent. |
| A. | 2 |
| B. | 6 |
| C. | 12 |
| D. | 18 |
| Answer» C. 12 | |
| 110. |
Natural gas recovered along with crude oil from oil wells is called wet natural gas which has a higher __________ compared to the dry natural gas. |
| A. | unsaturated hydrocarbon content |
| B. | calorific value |
| C. | quantity of propane |
| D. | quantity of butane |
| Answer» C. quantity of propane | |
| 111. |
Clay treatment is used to remove |
| A. | salt from the crude oil. |
| B. | colour & dissolved gases from cracked gasoline. |
| C. | wax from lube oil. |
| D. | none of these. |
| Answer» C. wax from lube oil. | |
| 112. |
Petroleum deposits are detected by the. |
| A. | oil seepage at the surface of the earth. |
| B. | measuremet of density, elasticity and magnetic & electric properties of the rock in the crust of the earth. |
| C. | age & nature of rocks inside the crust of the earth. |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 113. |
Reforming |
| A. | uses naphtha as feedstock. |
| B. | does not much affect the molecular weight of the feed. |
| C. | improves the quality & yield of gasoline. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 114. |
Which of the followingis desirable in petrol (gasoline) but undesirable in kerosene ? |
| A. | Paraffins |
| B. | Aromatics |
| C. | Mercaptans |
| D. | Naphthenic acid |
| Answer» D. Naphthenic acid | |
| 115. |
The order of preference for feedstock to a catalytic reformer is |
| A. | catalytic naphtha - coking naphtha - virgin naphtha. |
| B. | coking naphtha - virgin naphtha - catalytic naphtha. |
| C. | virgin naphtha - catalytic naphtha - coking naphtha. |
| D. | virgin naphtha - coking naphtha - catalytic naphtha. |
| Answer» C. virgin naphtha - catalytic naphtha - coking naphtha. | |
| 116. |
Aniline point is a property of the |
| A. | diesel |
| B. | LPG |
| C. | naphtha |
| D. | gasoline |
| Answer» D. gasoline | |
| 117. |
With increase in the molecular weight of aromatic present in kerosene, its smoking tendency |
| A. | increases |
| B. | decreases |
| C. | remains same |
| D. | is unpredictable |
| Answer» B. decreases | |
| 118. |
Iso-octane is used as a reference substance in the definition of octane number and it is assigned an octane number value of 100. Iso-octance is chemically known as |
| A. | α-methyl naphthalene. |
| B. | 2-2-4 tri methyl pentane. |
| C. | 1, 3 butadiene. |
| D. | tetra methyl ethylene. |
| Answer» C. 1, 3 butadiene. | |
| 119. |
Smoke point of kerosene is the |
| A. | time after which smoking starts on burning. |
| B. | 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. |
| Answer» C. maximum height of flame (in mm) without causing smoking, when burnt in a standard lamp. | |
| 120. |
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. |
| Answer» B. lighter/low boiling products are prone to thermal decomposition. | |
| 121. |
A multigrade lubricating oil means an oil having high |
| A. | viscosity index |
| B. | viscosity |
| C. | aniline point |
| D. | flash point |
| Answer» B. viscosity | |
| 122. |
Crude oil is transported inland from oil field to refineries, mainly by the |
| A. | road tankers |
| B. | rail tankers |
| C. | underground pipelines |
| D. | none of these |
| Answer» D. none of these | |
| 123. |
Reforming converts |
| A. | olefins into paraffins |
| B. | naphthenes into aromatics |
| C. | naphthenes into olefins. |
| D. | naphthenes into paraffin. |
| Answer» C. naphthenes into olefins. | |
| 124. |
Refractive index of a petrofuel which is the ratio of velocity of light in air to its velocity in the petrofuel gives an indication if its |
| A. | molecular weight |
| B. | aromatics content |
| C. | both a & b |
| D. | neither a nor b |
| Answer» D. neither a nor b | |
| 125. |
Octane number of gasoline produced by two stage fluidised catalytic cracking process is |
| A. | 80 |
| B. | 87 |
| C. | 92 |
| D. | 97 |
| Answer» E. | |
| 126. |
In solutizer sweetening process, solutizer solution used is |
| A. | methanol in Unisol process. |
| B. | naphthenic acid in Mercapsol process. |
| C. | both (a) and (b). |
| D. | neither (a) nor (b). |
| Answer» D. neither (a) nor (b). | |
| 127. |
Gum formation in stored gasoline is mainly due to the |
| A. | alkylation of unsaturates. |
| B. | presence of sulphur. |
| C. | oxidation & polymerisation of unsaturates. |
| D. | higher aromatic content. |
| Answer» C. oxidation & polymerisation of unsaturates. | |
| 128. |
Which is the most desirable component of a good quality kerosene ? |
| A. | i-paraffins |
| B. | Aromatics |
| C. | n-paraffins |
| D. | Naphthenes |
| Answer» D. Naphthenes | |
| 129. |
The most important property for a jet fuel is its |
| A. | viscosity |
| B. | freezing point |
| C. | calorific value |
| D. | flash point |
| Answer» C. calorific value | |
| 130. |
Feed for reforming is generally |
| A. | naphtha or straight run gasoline. |
| B. | reduced crude. |
| C. | vacuum gas oil. |
| D. | atmospheric gas oil. |
| Answer» B. reduced crude. | |
| 131. |
The conductivity of crude oil-water mixture depends on the |
| A. | pH value |
| B. | water percentage |
| C. | temperature |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 132. |
Increase in the specific gravity of petroleum products indicates |
| A. | decrease in paraffin content. |
| B. | increase in thermal energy per unit weight. |
| C. | increase in aromatic content. |
| D. | higher H/C ratio. |
| Answer» B. increase in thermal energy per unit weight. | |
| 133. |
Which of the following hydrocarbons of same carbon atoms has minimum smoking tendency ? |
| A. | Paraffins |
| B. | Naphthenes |
| C. | Aromatics |
| D. | Iso-paraffins |
| Answer» B. Naphthenes | |
| 134. |
Diesel index is defined as |
| A. | (°API) x (Aniline Point, °F)/100 |
| B. | (°API) x (Aniline Point, °C)/100 |
| C. | (°API) x (100)/Aniline Point, °F |
| D. | (°API) x (100)/Aniline Point, °C |
| Answer» B. (¬∞API) x (Aniline Point, ¬∞C)/100 | |
| 135. |
Solvent used for dewaxing of petroleum products are |
| A. | furfural |
| B. | methyl ethyl ketone (MEK) |
| C. | propane |
| D. | both(b)&(c) |
| Answer» D. both(b)&(c) | |
| 136. |
Which of the following has the lowest flash point of all? |
| A. | Diesel |
| B. | Kerosene |
| C. | Petrol |
| D. | Furnace oil |
| Answer» D. Furnace oil | |
| 137. |
Main constituent of natural gas is |
| A. | CH4 |
| B. | C2H2 |
| C. | C2H4 |
| D. | C2H6 |
| Answer» B. C2H2 | |
| 138. |
Feedstock for polymerisation is |
| A. | naphtha. |
| B. | cracked gases rich in C2 & C4 olefins. |
| C. | low boiling aromatics. |
| D. | none of these. |
| Answer» C. low boiling aromatics. | |
| 139. |
Road grade bitumen is produced from vacuum residue by its |
| A. | aeration |
| B. | pyrolysis |
| C. | hydrogenation |
| D. | steam reforming |
| Answer» E. | |
| 140. |
Which of the following is the most suitable feed for platforming process (reforming) ? |
| A. | Olefinic hydrocarbon |
| B. | Naphtha |
| C. | Fuel oil |
| D. | Atmospheric residue |
| Answer» B. Naphtha | |
| 141. |
Pressure & temperature maintained in catalytic cracking is about |
| A. | 2atm & 500°C |
| B. | 10atm & 500°C |
| C. | 30atm & 200°C |
| D. | 50atm. & 750°C |
| Answer» B. 10atm & 500¬∞C | |
| 142. |
Carbon/hydrogen ratio (by weight) is maximum (out of following) for |
| A. | gasoline |
| B. | kerosene |
| C. | light gas oil |
| D. | heavy fuel oil |
| Answer» B. kerosene | |
| 143. |
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. |
| Answer» B. keep contaminants in suspension. | |
| 144. |
Presence of predominantly large quantity of aromatics (polynuclear) is not desirable in aviation fuel, because it has |
| A. | high pour point and low smoke point. |
| B. | low viscosity index. |
| C. | high self-ingnition temperature. |
| D. | all (a), (b) and.(c). |
| Answer» C. high self-ingnition temperature. | |
| 145. |
The reservoir rock containing petroleum has |
| A. | low porosity |
| B. | high permeability |
| C. | high porosity |
| D. | both (b) and (c) |
| Answer» E. | |
| 146. |
The characterisation factor of a crude oil is calculated as 12.5. It means that; it is |
| A. | paraffinic |
| B. | naphthenic |
| C. | intermediate |
| D. | none of these |
| Answer» B. naphthenic | |
| 147. |
High aniline point of a petrofuel (say diesel) indicates that |
| A. | it is highly aromatic in nature. |
| B. | it is highly paraffinic in nature. |
| C. | it has a very low diesel index. |
| D. | its ignition quality is very poor. |
| Answer» C. it has a very low diesel index. | |
| 148. |
The doctor's solution comprises of sodium plumbite in |
| A. | alcohal |
| B. | water |
| C. | aqueous caustic soda |
| D. | soda ash |
| Answer» D. soda ash | |
| 149. |
Pour point of a petrofuel is |
| A. | multiple of 3°F. |
| B. | multiple of 5°F. |
| C. | 5°C below the temperature at which oil ceases to flow. |
| D. | none of these. |
| Answer» D. none of these. | |
| 150. |
Asphalts are |
| A. | low molecular weight & low boiling point compounds present in petroleum. |
| B. | desirable in catalytic cracking feedstock, because they produce coke. |
| C. | readily oxidisable and form carbonaceous sludge. |
| D. | all (a), (b) & (c). |
| Answer» D. all (a), (b) & (c). | |