MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 8247 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 5601. |
Higher vapour pressure of gasoline indicates |
| A. | low flash point |
| B. | high breathing loss |
| C. | both (a) and (b) |
| D. | neither (a) nor (b) |
| Answer» E. | |
| 5602. |
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. | -methyl naphthalene. |
| B. | 2-2-4 tri methyl pentane. |
| C. | 1, 3 butadiene. |
| D. | tetra methyl ethylene. |
| Answer» C. 1, 3 butadiene. | |
| 5603. |
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. | |
| 5604. |
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. |
| A. | 1 |
| B. | 50 |
| C. | 5000 |
| D. | 10000 |
| Answer» C. 5000 | |
| 5605. |
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 | |
| 5606. |
Which of the following is not a sulphur compound present in petroleum ? |
| A. | Thiophenes |
| B. | Mercaptans |
| C. | Sulphones |
| D. | Pyroles |
| Answer» E. | |
| 5607. |
Which of the following is not an important property of fuel oil/furnace oil ? |
| A. | Sulphur content |
| B. | Viscosity |
| C. | Aniline point |
| D. | Flash point |
| Answer» D. Flash point | |
| 5608. |
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 | |
| 5609. |
Extractor temperature is maintained at -20 C in Edeleanu process to reduce the __________ of kerosene. |
| A. | smoke point |
| B. | paraffins |
| C. | aromatics |
| D. | naphthenes |
| Answer» D. naphthenes | |
| 5610. |
Cracking is |
| A. | an exothermic reaction. |
| B. | an endothermic reaction. |
| C. | favoured at very low temperature. |
| D. | none of these. |
| Answer» C. favoured at very low temperature. | |
| 5611. |
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 | |
| 5612. |
Products drawn from the top to bottom of the crude oil distillation column has progressively increasing |
| A. | boiling points |
| B. | molecular weight |
| C. | C/H ratio |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 5613. |
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). | |
| 5614. |
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» D. none of these. | |
| 5615. |
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. | |
| 5616. |
Aniline point of high speed diesel may be about __________ C. |
| A. | 35 |
| B. | 70 |
| C. | 105 |
| D. | 150 |
| Answer» C. 105 | |
| 5617. |
Which of the following does not require preheating during storage in the storage tank as well as during atomisation through burners ? |
| A. | PCM |
| B. | Tar |
| C. | Light diesel oil |
| D. | Low viscosity furnace oil |
| Answer» D. Low viscosity furnace oil | |
| 5618. |
A typical yield of kerosene in straight run distillation of crude oil may be about __________ percent. |
| A. | 4 |
| B. | 10 |
| C. | 18 |
| D. | 26 |
| Answer» C. 18 | |
| 5619. |
The vacuum maintained in vacuum distillation unit for reduced crude is about __________ mmHg. |
| A. | 1.2 |
| B. | 12 |
| C. | 120 |
| D. | 700 |
| Answer» D. 700 | |
| 5620. |
Octane number (unleaded) of reformed gasoline may be upto |
| A. | 60 |
| B. | 70 |
| C. | 80 |
| D. | 90 |
| Answer» E. | |
| 5621. |
Aniline point is a property of the |
| A. | diesel |
| B. | LPG |
| C. | naphtha |
| D. | gasoline |
| Answer» D. gasoline | |
| 5622. |
Waxes present in petroleum products |
| A. | can be separated out by distillation. |
| B. | are not soluble in them. |
| C. | crystallise out at low temperature. |
| D. | decrease their viscosity. |
| Answer» D. decrease their viscosity. | |
| 5623. |
Tetraethyl lead is added to the petrol to increase its octane number, because its octane number is |
| A. | more than 100 |
| B. | round about 100 |
| C. | between 50 and 100 |
| D. | less than 25 |
| Answer» B. round about 100 | |
| 5624. |
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 | |
| 5625. |
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 | |
| 5626. |
Highest quality bitumen is produced from the __________ crude oil. |
| A. | paraffinic |
| B. | naphthenic |
| C. | intermediate |
| D. | mixed |
| Answer» C. intermediate | |
| 5627. |
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 | |
| 5628. |
Gasoline yield in catalytic reforming of naphtha may be about __________ percent by weight. |
| A. | 85 |
| B. | 65 |
| C. | 50 |
| D. | 98 |
| Answer» B. 65 | |
| 5629. |
The main reaction in reforming is the |
| A. | dehydrogenation of naphthenes. |
| B. | hydrogenation of naphthenes. |
| C. | hydrocracking of paraffins. |
| D. | saturation of olefins. |
| Answer» B. hydrogenation of naphthenes. | |
| 5630. |
Carbon percentage (by weight) in crude petroleum may be about |
| A. | 65 |
| B. | 75 |
| C. | 85 |
| D. | 95 |
| Answer» D. 95 | |
| 5631. |
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. | |
| 5632. |
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 | |
| 5633. |
Maximum viscosity of tar/PCM/fuel oil for easy and efficient atomisation in conventional burner is __________ centistokes (or 100 Redwood I seconds). |
| A. | 5 |
| B. | 25 |
| C. | 50 |
| D. | 100 |
| Answer» C. 50 | |
| 5634. |
Thermofer catalytic cracking process is a __________ process. |
| A. | fixed bed |
| B. | moving bed |
| C. | fluidised bed |
| D. | non-catalytic |
| Answer» E. | |
| 5635. |
Higher boiling fractions like atmospheric residue is distilled under vacuum at low temperature because at high temperature, there is a tendency of the predominance of |
| A. | thermal cracking |
| B. | gum formation |
| C. | coking |
| D. | discoloration |
| Answer» D. discoloration | |
| 5636. |
Crude oils containing more than __________ kg of total salts (expressed in terms of NaCl) per thousand barrel is called a 'salty crude'. |
| A. | 1 |
| B. | 5 |
| C. | 15 |
| D. | 25 |
| Answer» C. 15 | |
| 5637. |
Reid vapour pressure of gasoline is the measure of its |
| A. | pour point |
| B. | cloud point |
| C. | vapour locking tendency |
| D. | carbon residue |
| Answer» D. carbon residue | |
| 5638. |
Crude petroleum oil is a __________ fuel. |
| A. | primary |
| B. | fossil |
| C. | both (a) & (b) |
| D. | secondary |
| Answer» D. secondary | |
| 5639. |
Molecular weight of crude oil is in the range of |
| A. | 100-120 |
| B. | 230-250 |
| C. | 450-550 |
| D. | 600-850 |
| Answer» C. 450-550 | |
| 5640. |
Catalyst used in the isomerisation is |
| A. | aluminium chloride |
| B. | alumina |
| C. | nickel |
| D. | phosphoric acid |
| Answer» B. alumina | |
| 5641. |
Octane numbers of motor gasoline used in India and America are respectively |
| A. | 87 & 94 |
| B. | 94 && 87 |
| C. | 94 && 100 |
| D. | 83 && 100 |
| Answer» B. 94 && 87 | |
| 5642. |
High aniline point of diesel indicates that, it |
| A. | is highly aromatic. |
| B. | has a large ignition delay. |
| C. | is highly paraffinic. |
| D. | has a low diesel index. |
| Answer» D. has a low diesel index. | |
| 5643. |
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 | |
| 5644. |
Which is the most ideal feed stock for 'coking' process used for the manufacture of petroleum coke ? |
| A. | Naphtha |
| B. | Vacuum residue |
| C. | Light gas oil |
| D. | Diesel |
| Answer» C. Light gas oil | |
| 5645. |
Performance number of a liquid fuel is related to its |
| A. | wax content |
| B. | spontaneous ignition temperature |
| C. | knocking tendency |
| D. | sulphur content |
| Answer» C. knocking tendency | |
| 5646. |
Naphtha yield in straight run distillation of crude oil may be about __________ percent. |
| A. | 2 |
| B. | 6 |
| C. | 12 |
| D. | 18 |
| Answer» C. 12 | |
| 5647. |
Mercapsol and Unisol processes are meant for the |
| A. | dearomatisation of kerosene |
| B. | removal of mercaptans |
| C. | dewaxing |
| D. | decoloration |
| Answer» C. dewaxing | |
| 5648. |
Solvent used in the Udex (glycol) extraction process for removal of light aromatics from cracked naphtha is |
| A. | propane. |
| B. | diethylene glycol. |
| C. | aqueous solution (10% water) of diethylene glycol. |
| D. | methyl ethyl ketone (MEK). |
| Answer» D. methyl ethyl ketone (MEK). | |
| 5649. |
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 | |
| 5650. |
Which of the following is the most important property for a jet fuel ? |
| A. | Cloud point |
| B. | Pour point |
| C. | Colour |
| D. | Freezing point |
| Answer» E. | |