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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.
| 5551. |
With increase in the number of carbon and hydrogen atoms in hydrocarbon molecules, the density of petroleum products |
| A. | decreases |
| B. | increases |
| C. | remains same |
| D. | unpredictable from the data |
| Answer» C. remains same | |
| 5552. |
Smoke point of a good burning kerosene may be around __________ mm. |
| A. | 0-5 |
| B. | 20-25 |
| C. | 60-75 |
| D. | 100-120 |
| Answer» C. 60-75 | |
| 5553. |
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. | |
| 5554. |
Which of the following processes is used for the production of petroleum coke ? |
| A. | Stabilisation |
| B. | Visbreaking |
| C. | Cracking |
| D. | Reforming |
| Answer» D. Reforming | |
| 5555. |
Pick out the correct statement pertaining to catalytic cracking. |
| A. | With increase in the reactor pressure, octane number of gasoline decreases. |
| B. | With increase in the reactor temperature, gasoline yield decreases for a given conversion. |
| C. | Percentage conversion increases with increase in the catalyst to oil ratio. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 5556. |
Which of the following is a naphthene ? |
| A. | Butene |
| B. | Butadiene |
| C. | Cyclohexane |
| D. | Acetylene |
| Answer» D. Acetylene | |
| 5557. |
Visbreaking |
| A. | uses natural gas as feed. |
| B. | is carried out at atmospheric pressure. |
| C. | produces fuel oil of lower viscosity. |
| D. | produces gasoline only. |
| Answer» D. produces gasoline only. | |
| 5558. |
Cetane number of alpha methyl naphthalene is assumed to be |
| A. | 0 |
| B. | 100 |
| C. | 50 |
| D. | |
| Answer» B. 100 | |
| 5559. |
'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 | |
| 5560. |
Which of the following has the highest flash point of all ? |
| A. | Diesel |
| B. | Kerosene |
| C. | Petrol |
| D. | Furnace oil |
| Answer» E. | |
| 5561. |
The characterisation factor of crude petroleum oil is around |
| A. | 3 |
| B. | 11 |
| C. | 22 |
| D. | 28 |
| Answer» C. 22 | |
| 5562. |
The main purpose of recycling the byproduct hydrogen gas in the reformer reactor is to |
| A. | obviate catalyst poisoning. |
| B. | maintain the reaction temperature. |
| C. | sustain the reactor pressure. |
| D. | hydrogenate the feed stock. |
| Answer» D. hydrogenate the feed stock. | |
| 5563. |
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. | |
| 5564. |
Flash point of diesel/kerosene (>50 C) is determined by the |
| A. | Abel apparatus |
| B. | Pensky-Martens apparatus |
| C. | Saybolt chromometer |
| D. | none of these |
| Answer» C. Saybolt chromometer | |
| 5565. |
Both asphalt and wax are produced by __________ base crude oils. |
| A. | naphthenic |
| B. | asphalt |
| C. | paraffin |
| D. | mixed |
| Answer» E. | |
| 5566. |
Which one is preferred for aircraft engine ? |
| A. | High viscosity index lube oil. |
| B. | Low viscosity index lube oil. |
| C. | High freezing point aviation fuel. |
| D. | None of these. |
| Answer» B. Low viscosity index lube oil. | |
| 5567. |
The condesate obtained on compression of wet natural gas is termed as |
| A. | liquefied natural gasoline |
| B. | natural gasoline |
| C. | liquid natural gas |
| D. | none of these |
| Answer» C. liquid natural gas | |
| 5568. |
In sweetening process, solutizer agent used with caustic alkali is |
| A. | potassium isobutyrate |
| B. | sodium plumbite |
| C. | methanol |
| D. | phenol |
| Answer» B. sodium plumbite | |
| 5569. |
Sulphuric acid treatment of petroleum products removes the __________ materials. |
| A. | gum forming |
| B. | color forming |
| C. | asphaltic |
| D. | all (a), (b) & (c) |
| Answer» E. | |
| 5570. |
Hydrogen content in petroleum products varies from 12 to 15% (by weight). As a result the difference between gross and net heating value of petroleum fuels varies in the range of __________ kcal/kg. |
| A. | 600-750 |
| B. | 250-350 |
| C. | 1000-1500 |
| D. | 2000-2500 |
| Answer» B. 250-350 | |
| 5571. |
Which of the following processes consumes hydrogen ? |
| A. | Fluid catalytic cracking |
| B. | Visbreaking |
| C. | Propane deasphalting |
| D. | None of these |
| Answer» B. Visbreaking | |
| 5572. |
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. | |
| 5573. |
Pick out the wrong statement about the design of a sieve plate column. |
| A. | An increased weir height improves the tray efficiency at the cost of high plate pressure drop; optimum wear height being 40-90 mm for column pressure above atmospheric and 6-12 mm for vacuum columns. |
| B. | For segmental downcomers, the chord length is 60-80% of the column diameter. An initial value of downcomer area of 12% is taken in the design. |
| C. | Width of the calming section provided at the inlet and outlet sides of the plate is 75 mm for column diameter below 1.5 metres and 100 mm for larger diameter columns. |
| D. | Minimum recommended downcomer residence time for the disengagement of entrained vapour is the same for both foaming and non-foaming liquids, which is about 20 seconds. |
| Answer» E. | |
| 5574. |
Which of the following has the highest viscosity of all (at a given temperature) ? |
| A. | Naphtha |
| B. | Fuel oil |
| C. | Light diesel oil |
| D. | Petrol |
| Answer» C. Light diesel oil | |
| 5575. |
Generally, no corrosion allowance in wall thickness of a part is required, if the thickness is more than __________ mm. |
| A. | 10 |
| B. | 20 |
| C. | 30 |
| D. | 5 |
| Answer» D. 5 | |
| 5576. |
Multiple blade paddle agitator is used for mixing high viscosity liquids/paste in which the paddle diameter is commonly 0.8 times the tank diameter. However, the width of the blade is in the range of __________ times the paddle diameter. |
| A. | 0.1 to 0.25 |
| B. | 0.3 to 0.5 |
| C. | 0.5 to 0.6 |
| D. | 0.65 to 0.80 |
| Answer» B. 0.3 to 0.5 | |
| 5577. |
In a __________ rivetted joint, the rivets in the various rows are opposite to each other. |
| A. | zig-zag |
| B. | chain |
| C. | diamond |
| D. | none of these |
| Answer» C. diamond | |
| 5578. |
Vertical vessels are not supported by |
| A. | brackets |
| B. | skirts |
| C. | columns |
| D. | saddles |
| Answer» E. | |
| 5579. |
With increase in pressure drop (for a given particle size), the dust collection efficiency of a cyclone separator will |
| A. | increase |
| B. | decrease |
| C. | remain unaffected |
| D. | increase or decrease depending on the nature of the dust. |
| Answer» B. decrease | |
| 5580. |
Spherical shaped pressure vessel is considered to be the most ideal, because it can |
| A. | withstand higher pressure for a given metallic shell thickness. |
| B. | be fabricated very easily. |
| C. | be designed without wind load considerations. |
| D. | be supported very easily. |
| Answer» B. be fabricated very easily. | |
| 5581. |
An adequate clearance between the tray and the shell wall of a distillation column is provided to |
| A. | drain the liquid from the tray when the unit is not in operation. |
| B. | allow for thermal expansion and facilitate installation. |
| C. | avoid back-trapping. |
| D. | none of these. |
| Answer» C. avoid back-trapping. | |
| 5582. |
Hydrogen percentage (by weight) in crude petroleum may be about |
| A. | 5 |
| B. | 15 |
| C. | 25 |
| D. | 35 |
| Answer» C. 25 | |
| 5583. |
Which of the following is an additive used for improving the cetane number of diesel ? |
| A. | Tetraethyl lead |
| B. | Tetramethyllead |
| C. | Ethyl nitrate or acetone |
| D. | None of these |
| Answer» B. Tetramethyllead | |
| 5584. |
Tetra-ethyl lead is added in gasoline to |
| A. | increase its smoke point. |
| B. | reduce gum formation. |
| C. | reduce the pour point. |
| D. | increase its octane number. |
| Answer» E. | |
| 5585. |
Crude topping column operates at __________ pressure. |
| A. | atmospheric |
| B. | 10 atm |
| C. | vacuum |
| D. | 3 atm. |
| Answer» B. 10 atm | |
| 5586. |
Aniline point of the diesel is a measure of its __________ content. |
| A. | aromatic |
| B. | paraffin |
| C. | olefin |
| D. | naphthene |
| Answer» B. paraffin | |
| 5587. |
Which of the following additives improves the cetane number of diesel ? |
| A. | Amyl nitrate |
| B. | Ethyl mercaptan |
| C. | Napthenic acid |
| D. | Tetra ethyl lead |
| Answer» B. Ethyl mercaptan | |
| 5588. |
In catalytic cracking process, olefins crack __________ times faster than in thermal cracking process. |
| A. | 100 |
| B. | 200-300 |
| C. | 1000-10000 |
| D. | 10 |
| Answer» D. 10 | |
| 5589. |
H/C ratio (by weight) for the same number of carbon atoms is the highest in case of |
| A. | aromatics |
| B. | paraffins |
| C. | olefins |
| D. | naphthenes |
| Answer» E. | |
| 5590. |
Liquefied Petroleum Gas (LPG) in domestic use cylinders is in the liquid form. The density of LPG in liquid form is about __________ of that of water (i.e. 1 gm/c.c). |
| A. | one fourth |
| B. | one third |
| C. | half |
| D. | one eighth |
| Answer» D. one eighth | |
| 5591. |
Pyrolysis of kerosene or natural gasoline is done to produce mainly the |
| A. | olefins and aromatics |
| B. | lighter paraffins |
| C. | stabilised gasoline |
| D. | diesel |
| Answer» B. lighter paraffins | |
| 5592. |
Which of the following fractions of petroleum contains maximum sulphur ? |
| A. | Diesel |
| B. | Gasoline |
| C. | Naphtha |
| D. | Atmospheric residue |
| Answer» E. | |
| 5593. |
Aniline point is the temperature at which |
| A. | equal weight of diesel & the aniline are completely miscible. |
| B. | equal weight of aniline & the test sample are completely miscible. |
| C. | equal volume of aniline & the test sample are completely miscible. |
| D. | aniline vaporises. |
| Answer» D. aniline vaporises. | |
| 5594. |
Flash point of a liquid petroleum fuel gives an idea about its |
| A. | volatility. |
| B. | explosion hazards characteristics. |
| C. | nature of boiling point diagram. |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 5595. |
Clay treatment of petroleum products |
| A. | decolorises & stabilises cracked gasoline. |
| B. | desulphurise straight run gasoline & kerosene. |
| C. | adsorb arsenic from feedstock to catalytic reforming. |
| D. | all (a), (b) & (c). |
| Answer» E. | |
| 5596. |
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. | |
| 5597. |
In catalytic cracking, the |
| A. | gasoline obtained has a very low octane number. |
| B. | pressure & temperature is very high. |
| C. | gasoline obtained has very high aromatic content. |
| D. | gasoline obtained has very high amount of gum forming compounds. |
| Answer» D. gasoline obtained has very high amount of gum forming compounds. | |
| 5598. |
LPG stands for |
| A. | liquid petroleum gas |
| B. | liquified petrol gas |
| C. | liquid petrol gas |
| D. | liquefied petroleum gas |
| Answer» E. | |
| 5599. |
"Breathing loss" on storage of gasoline occurs due to the |
| A. | presence of unsaturated air. |
| B. | fluctuation of ambient temperature during day and night. |
| C. | both (a) and (b). |
| D. | neither (a) nor (b). |
| Answer» C. both (a) and (b). | |
| 5600. |
Which of the following theories of origin of petroleum does not explain the presence of nitrogen & sulphur compounds in crude oil? |
| A. | Modern theory |
| B. | Carbide theory |
| C. | Engler theory |
| D. | all (a), (b) and (c) |
| Answer» C. Engler theory | |