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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.
| 5651. |
Which parameter is used for the grading of paraffin waxes ? |
| A. | Specific gravity |
| B. | Melting point |
| C. | Viscosity |
| D. | Penetration number |
| Answer» D. Penetration number | |
| 5652. |
Salt content (measured as sodium chloride) in electrically desalted crude oil comes down to a level of about __________ ptb (pounds per thousand barrel). |
| A. | 0.03 |
| B. | 3 |
| C. | 35 |
| D. | 70 |
| Answer» C. 35 | |
| 5653. |
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. | |
| 5654. |
Water separometer index (modified) (WSIM) of a petrofuel is the measure of its |
| A. | emulsification tendency. |
| B. | water separation characteristics. |
| C. | water content. |
| D. | water absorbing capacity from atmosphere. |
| Answer» C. water content. | |
| 5655. |
Which of the following has the minimum API gravity of all? |
| A. | Diesel |
| B. | Kerosene |
| C. | Petrol |
| D. | Furnace oil |
| Answer» E. | |
| 5656. |
Higher pressure in the reforming reactor |
| A. | increases coke formation. |
| B. | increases the rate of reaction. |
| C. | produces high octane number gasoline. |
| D. | none of these. |
| Answer» E. | |
| 5657. |
Which of the following gasolines (unleaded) has the least octane number ? |
| A. | Catalytically cracked gasoline |
| B. | Straight run gasoline |
| C. | Catalytically reformed gasoline |
| D. | Polymer gasoline |
| Answer» C. Catalytically reformed gasoline | |
| 5658. |
Which of the following is a non-regenerative fixed bed catalytic reforming process ? |
| A. | Hydroforming |
| B. | Thermofer catalytic reforming |
| C. | Platforming |
| D. | Hyperforming |
| Answer» D. Hyperforming | |
| 5659. |
Lane and Garton classification of petroleum is based on its |
| A. | composition |
| B. | specific gravity |
| C. | optical properties |
| D. | viscosity |
| Answer» C. optical properties | |
| 5660. |
Reforming converts |
| A. | olefins into paraffins |
| B. | naphthenes into aromatics |
| C. | naphthenes into olefins. |
| D. | naphthenes into paraffin. |
| Answer» C. naphthenes into olefins. | |
| 5661. |
Percentage of straight run gasoline in a typical crude oil may be around |
| A. | 6 |
| B. | 18 |
| C. | 38 |
| D. | 52 |
| Answer» E. | |
| 5662. |
Road grade bitumen is produced from vacuum residue by its |
| A. | aeration |
| B. | pyrolysis |
| C. | hydrogenation |
| D. | steam reforming |
| Answer» E. | |
| 5663. |
Sweetening of petroleum product means the removal of |
| A. | sulphur & its compounds |
| B. | water |
| C. | organic impurities |
| D. | wax |
| Answer» B. water | |
| 5664. |
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. | |
| 5665. |
Which of the following has maximum hydrogen/carbon ratio (by weight) ? |
| A. | Naphtha |
| B. | Gasoline |
| C. | Diesel |
| D. | Fuel oil |
| Answer» C. Diesel | |
| 5666. |
Which is an anticing compound ? |
| A. | Amyl nitrate |
| B. | Alcohals |
| C. | Mercaptans |
| D. | Pyridine |
| Answer» C. Mercaptans | |
| 5667. |
The terminology used for the bottom most product from the vacuum crude distillation unit is |
| A. | residual crude |
| B. | residuum |
| C. | reduced crude |
| D. | petrolatum |
| Answer» C. reduced crude | |
| 5668. |
A multigrade lubricating oil means an oil having high |
| A. | viscosity index |
| B. | viscosity |
| C. | aniline point |
| D. | flash point |
| Answer» B. viscosity | |
| 5669. |
Most widely used solvent for dewaxing is |
| A. | methyl-ethyl-ketone (MEK) |
| B. | naphtha |
| C. | petroleum ether |
| D. | sodium plumbite |
| Answer» B. naphtha | |
| 5670. |
Liquefied Petroleum Gas (LPG) is mainly a mixture of |
| A. | propane & butane |
| B. | methane & ethane |
| C. | high boiling olefins |
| D. | high boiling naphthenes |
| Answer» B. methane & ethane | |
| 5671. |
Water content in the crude oil as it comes out of oil well may be upto __________ percent. |
| A. | 2 |
| B. | 5 |
| C. | 10 |
| D. | 25 |
| Answer» E. | |
| 5672. |
Which of the following is the easiest to crack? |
| A. | Paraffins |
| B. | Olefins |
| C. | Naphthenes |
| D. | Aromatics |
| Answer» B. Olefins | |
| 5673. |
__________ treatment is done for appreciable improvement in viscosity index of lubricating oil. |
| A. | Acid |
| B. | Solvent extraction |
| C. | Alkali |
| D. | Clay |
| Answer» C. Alkali | |
| 5674. |
Which of the following reactions is undesirable in the production of catalytically reformed gasoline ? |
| A. | Dehydrogenation of naphthene |
| B. | Dehydrogenation of lower paraffins |
| C. | Dehydrocyclisation of higher paraffins |
| D. | Isomerisation of paraffins |
| Answer» C. Dehydrocyclisation of higher paraffins | |
| 5675. |
Good quality kerosene should have |
| A. | low smoke point. |
| B. | high smoke point. |
| C. | high aromatics content. |
| D. | low paraffins content. |
| Answer» C. high aromatics content. | |
| 5676. |
The most suitable solvent for deasphalting vacuum residue is |
| A. | propane |
| B. | methyl ethyl ketone |
| C. | doctor's solution |
| D. | methanol amine |
| Answer» C. doctor's solution | |
| 5677. |
Paraffins are desirable in lubricating oil, as it has got high |
| A. | viscosity |
| B. | viscosity index |
| C. | smoke point |
| D. | pour point |
| Answer» D. pour point | |
| 5678. |
Catalyst used in alkylation process is |
| A. | sulphuric acid |
| B. | nickel |
| C. | silica gel |
| D. | alumina |
| Answer» B. nickel | |
| 5679. |
__________ base crude oil is also called asphaltic crude. |
| A. | Paraffinic |
| B. | Naphthenic |
| C. | Mixed |
| D. | Aromatic |
| Answer» C. Mixed | |
| 5680. |
Platforming is a __________ process. |
| A. | moving bed |
| B. | fluidised bed |
| C. | non-regenerative & fixed bed |
| D. | regenerative |
| Answer» D. regenerative | |
| 5681. |
Aromatics have the highes __________ of all the hydrocarbons of same carbon atoms. |
| A. | smoke point |
| B. | octane number |
| C. | cetane number |
| D. | viscosity |
| Answer» C. cetane number | |
| 5682. |
The most widely used crude topping column in refineries is the __________ column. |
| A. | bubble-cap |
| B. | packed bed |
| C. | fluidised bed |
| D. | perforated plate |
| Answer» B. packed bed | |
| 5683. |
Phenols are added in gasoline to |
| A. | improve the octane number. |
| B. | act as an antioxidant. |
| C. | reduce its viscosity. |
| D. | increase its pour point. |
| Answer» C. reduce its viscosity. | |
| 5684. |
Antioxidants are added in petrol to |
| A. | impart colour to it, for easy identification. |
| B. | minimise the gum formation. |
| C. | prevent icing of the carburettor. |
| D. | prevent the lead build up in engines. |
| Answer» C. prevent icing of the carburettor. | |
| 5685. |
Gasoline extracted from natural gas (by compression and cooling) is called the __________ gasoline. |
| A. | polymer |
| B. | unleaded |
| C. | casing head |
| D. | straight run |
| Answer» C. casing head | |
| 5686. |
Which of the following categories of gasoline has the highest lead susceptibility ? |
| A. | Straight run gasoline |
| B. | Platinum reformed gasoline |
| C. | Catalytical cracked gasoline |
| D. | Polymer gasoline |
| Answer» B. Platinum reformed gasoline | |
| 5687. |
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» D. higher aromatic content. | |
| 5688. |
Flash point of an oil is determined by the |
| A. | Pensky Martens apparatus. |
| B. | Ramsbottom apparatus. |
| C. | Saybolt viscometer. |
| D. | Conradson apparatus. |
| Answer» B. Ramsbottom apparatus. | |
| 5689. |
Sulphur content in lighter and heavier petroleum products is generally determined respectively by |
| A. | lamp method and bomb method. |
| B. | bomb method and lamp method. |
| C. | bomb method and quartz tube method. |
| D. | quartz tube method and lamp method. |
| Answer» C. bomb method and quartz tube method. | |
| 5690. |
Equal volumes of aniline and diesel oil when mixed at room temperature (during summer) was found to be completely mis-cible. It means that the aniline point of the diesel is __________ the room temperature. |
| A. | more than |
| B. | less than |
| C. | same as |
| D. | either more or less; depends on the room temperature |
| Answer» D. either more or less; depends on the room temperature | |
| 5691. |
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 | |
| 5692. |
Petrolatum is |
| A. | same as petroleum ether. |
| B. | petroleum coke. |
| C. | a mixture of microcrystalline wax in viscous hydrocarbon liquids. |
| D. | none of these. |
| Answer» D. none of these. | |
| 5693. |
Electrical desalting of crude oil removes the __________ impurities. |
| A. | oleophilic |
| B. | oleophobic |
| C. | both (a) and (b) |
| D. | neither (a) nor (b) |
| Answer» C. both (a) and (b) | |
| 5694. |
An upper limit of oil content is limited to about __________ percent for achieving efficient and satisfactory level of wax sweating. |
| A. | 5 |
| B. | 15 |
| C. | 40 |
| D. | 60 |
| Answer» D. 60 | |
| 5695. |
Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl iso-butyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent has the advantages of the |
| A. | elimination of solvent drying facility. |
| B. | higher nitration temperature. |
| C. | lower solvent dilution ratio. |
| D. | all (a), (b) & (c). |
| Answer» E. | |
| 5696. |
Deoiling of wax is done by its |
| A. | heating |
| B. | cooling |
| C. | solvent extraction |
| D. | both(b)&(c) |
| Answer» E. | |
| 5697. |
Preheating temperature of medium viscosity furnace oil for better atomisation through burner is about __________ C. |
| A. | 50 |
| B. | 70 |
| C. | 90 |
| D. | 140 |
| Answer» D. 140 | |
| 5698. |
Molecular weight of crude petroleum may be around |
| A. | 50 |
| B. | 250 |
| C. | 1500 |
| D. | 5000 |
| Answer» C. 1500 | |
| 5699. |
Mercaptans is represented as (where R and R' are alkyl groups) |
| A. | R-COOH |
| B. | R-S-H |
| C. | R-S-R |
| D. | R-S-R' |
| Answer» C. R-S-R | |
| 5700. |
The pressure (kg/cm2 ) and temperature ( C) maintained in electrical desalters for crude oil are respectively |
| A. | 10 and 120 |
| B. | 1 and 200 |
| C. | 50 and 250 |
| D. | 10 and 300 |
| Answer» B. 1 and 200 | |