MCQOPTIONS
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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.
| 5751. |
Isomerisation converts the __________ tot-paraffins. |
| A. | paraffins |
| B. | olefins |
| C. | naphthenes |
| D. | none of these |
| Answer» B. olefins | |
| 5752. |
Straight run petrol as compared to methyl/ethyl alcohol has |
| A. | lower calorific value. |
| B. | lower octane number. |
| C. | higher specific gravity. |
| D. | higher ignition temperature. |
| Answer» C. higher specific gravity. | |
| 5753. |
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. | |
| 5754. |
Catalyst used in the catalytic cracking is |
| A. | silica-alumina |
| B. | silica gel |
| C. | vanadium pentoxide |
| D. | nickel |
| Answer» B. silica gel | |
| 5755. |
Though increased pressure has a retarding effect on cracking reaction, yet in actual process, a positive pressure of 10-15 kgf/cm2 is maintained during cracking mainly to |
| A. | increase the yield of light distillates. |
| B. | suppress coke formation. |
| C. | enhance the octane number of gasoline. |
| D. | reduce gum content in gasoline. |
| Answer» C. enhance the octane number of gasoline. | |
| 5756. |
Glycol added to petrol acts as a/an __________ agent. |
| A. | anti-knocking |
| B. | anti-icing |
| C. | anti-gum forming |
| D. | dewaxing |
| Answer» C. anti-gum forming | |
| 5757. |
Catalytic cracking compared to thermal cracking of residue of vacuum distillation of crude oil |
| A. | gives higher yield of petrol. |
| B. | lower octane number of petrol. |
| C. | higher sulphur content in the product. |
| D. | higher gum forming material in petrol. |
| Answer» B. lower octane number of petrol. | |
| 5758. |
Which one is used to determine the colour of petroleum products ? |
| A. | Colour comparator |
| B. | Saybolt chromometer |
| C. | Cleveland apparatus |
| D. | None of these |
| Answer» B. Saybolt chromometer | |
| 5759. |
Feedstock for the production of biodiesel is |
| A. | herbal plants |
| B. | used vegetable oils |
| C. | LSHS |
| D. | bagasse |
| Answer» C. LSHS | |
| 5760. |
Butadiene is a/an |
| A. | di-olefin |
| B. | naphthene |
| C. | aromatic |
| D. | olefin |
| Answer» B. naphthene | |
| 5761. |
Which of the following has the highest gum forming tendency in gosoline ? |
| A. | Paraffins |
| B. | Diolefins |
| C. | Aromatics |
| D. | Naphthenes |
| Answer» C. Aromatics | |
| 5762. |
Straight run naphtha is converted into high octane number petrol (gasoline) by catalytic |
| A. | cracking |
| B. | polymerisation |
| C. | reforming |
| D. | isomerisation |
| Answer» D. isomerisation | |
| 5763. |
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 | |
| 5764. |
Dearomatisation of kerosene (by liquid sulphur dioxide extraction) is done to |
| A. | increase its smoke point. |
| B. | improve its oxidation stability. |
| C. | decrease the breathing loss. |
| D. | none of these. |
| Answer» C. decrease the breathing loss. | |
| 5765. |
Higher viscosity of lubricating oil usually signifies |
| A. | lower Reid vapour pressure. |
| B. | higher acid number. |
| C. | higher flash point and fire point. |
| D. | lower flash point and fire point. |
| Answer» D. lower flash point and fire point. | |
| 5766. |
Aniline point test of an oil qualitatively indicates the __________ content of an oil. |
| A. | paraffin |
| B. | olefin |
| C. | aromatic |
| D. | naphthene |
| Answer» D. naphthene | |
| 5767. |
Which of the following processes in oil refinery does not employ 'cracking' ? |
| A. | Coking |
| B. | Visbreaking |
| C. | Pyrolysis |
| D. | None of these |
| Answer» E. | |
| 5768. |
Bottom product of atmospheric pressure crude oil distillation column is termed as |
| A. | reduced crude |
| B. | heavy ends |
| C. | asphalt |
| D. | residuum |
| Answer» B. heavy ends | |
| 5769. |
Presence of aromatics in |
| A. | diesel increases its cetane number. |
| B. | kerosene increases its smoke point. |
| C. | petrol increases its octane number. |
| D. | all (a), (b) and (c). |
| Answer» D. all (a), (b) and (c). | |
| 5770. |
Choose the correct statement regarding thermal cracking. |
| A. | Moderate changes in operating temperature does not change the depth of cracking. |
| B. | Increased residence time results in the decreased severity of cracking. |
| C. | At low pressure, the yield of lighter hydrocarbons are more. |
| D. | Greater depth of cracking gives lower octane number gasoline. |
| Answer» E. | |
| 5771. |
A typical yield of diesel in straight run distillation of crude oil may be about __________ percent. |
| A. | 8 |
| B. | 18 |
| C. | 28 |
| D. | 35 |
| Answer» B. 18 | |
| 5772. |
Which is almost absent in crude petroleum? |
| A. | Olefins |
| B. | Mercaptans |
| C. | Naphthenes |
| D. | Cycloparaffins |
| Answer» B. Mercaptans | |
| 5773. |
Naphthenic acid is a/an __________ compound. |
| A. | sulphur |
| B. | nitrogen |
| C. | oxygen |
| D. | none of these |
| Answer» D. none of these | |
| 5774. |
The maximum liquid gradient over a tray must not exceed |
| A. | 0.5" -1.25". |
| B. | 2"-3.5". |
| C. | 5". |
| D. | half the tray spacing. |
| Answer» B. 2"-3.5". | |
| 5775. |
Ideal solution is formed, when its components have zero |
| A. | heat of mixing. |
| B. | volume change. |
| C. | both (a) & (b). |
| D. | neither (a) nor (b). |
| Answer» D. neither (a) nor (b). | |
| 5776. |
The equilibria relations in a multicom-ponent and multiphase system can not be calculated with the help of the |
| A. | phase rule |
| B. | experimental data |
| C. | emperical equations |
| D. | theoretical equations |
| Answer» B. experimental data | |
| 5777. |
The effect of pressure on the heat capacity of the gases __________ is negligible. |
| A. | at pressure below one atmosphere |
| B. | below the critical temperature |
| C. | both(a)&(b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 5778. |
What is the total pressure exerted by a mixture of 0.45 kg mole of benzene, 0.44 kg mole of toluene and 0.23 kg mole of o-xylene at 100 C, if their vapor pressures at 100 C are 1340, 560 and 210 mmHg respectively ? |
| A. | 756.2 |
| B. | 780.5 |
| C. | 801.5 |
| D. | 880.5 |
| Answer» D. 880.5 | |
| 5779. |
An azeotropic solution of two liquids has boiling point lower than either of them, when it |
| A. | is saturated. |
| B. | is unsaturated. |
| C. | shows negative deviation from Raoult's law. |
| D. | shows positive deviation from Raoult's law. |
| Answer» E. | |
| 5780. |
40 gms each of the methane and oxygen are mixed in an empty container maintained at 40 C. The fraction of the total pressure exerted by oxygen is |
| A. | 1/2 |
| B. | 1/3 |
| C. | 1/4 |
| D. | 2/3 |
| Answer» C. 1/4 | |
| 5781. |
A rigid vessel containing three moles of nitrogen gas at 30 C is heated to 250 C. Assume the average capacities of nitrogen to be Cp = 29.1 J/mole. C and, Cv = 20.8 J/mole. C. The heat required, neglecting the heat capacity of the vessel, is |
| A. | 13728 J |
| B. | 19206 J |
| C. | 4576 J |
| D. | 12712 J |
| Answer» C. 4576 J | |
| 5782. |
An oxidation process is accompanied by decrease in the |
| A. | number of electrons. |
| B. | oxidation number. |
| C. | number of ions. |
| D. | all (a), (b) & (c). |
| Answer» B. oxidation number. | |
| 5783. |
Refluxing of part of the distillate in a fractionating column is a 'recycling operation', aimed primarily at |
| A. | heat conservation. |
| B. | yield enhancement. |
| C. | product enrichment. |
| D. | none of these. |
| Answer» D. none of these. | |
| 5784. |
Which of the following expressions defines the Baume gravity scale for liquids heavier than water ? |
| A. | (141.5/G) - 131.5 |
| B. | 145 - (145/G) |
| C. | 200(G-1) |
| D. | (400/G) - 400 |
| Answer» C. 200(G-1) | |
| 5785. |
Heat of reaction is not influenced by |
| A. | the route/method through which final products are obtained. |
| B. | the physical state (e.g., solid, liquid or gaseous) of reactants and products. |
| C. | whether the reaction is carried out at constant temperature or constant pressure. |
| D. | none of these. |
| Answer» B. the physical state (e.g., solid, liquid or gaseous) of reactants and products. | |
| 5786. |
Pick out the wrong conversion formula for the conversion of weight units : |
| A. | 1 tonne = 1000 kg = 22.046 lbs |
| B. | 1 U.S. ton = 907 kg = 0.907 tonne = 0.893 ton |
| C. | 1 ton = 2240 lbs = 1016 kg = 1.016 tonnes = 1.12 U.S. tons |
| D. | none of these |
| Answer» E. | |
| 5787. |
The elevation in boiling point of a solution is proportional to the __________ of the solution. |
| A. | molal concentration |
| B. | reciprocal of the molal concentration |
| C. | normality |
| D. | molarity |
| Answer» B. reciprocal of the molal concentration | |
| 5788. |
1 Pascal (unit of pressure) is equal to __________ N/m2. |
| A. | 10 |
| B. | 1 |
| C. | 0.1 |
| D. | 1000 |
| Answer» C. 0.1 | |
| 5789. |
In a binary liquid solution of components A and B, if component A exhibits positive deviation from Raoult's law, then component B |
| A. | exhibits positive deviation from Raoult's law. |
| B. | exhibits negative deviation from Raoult's law. |
| C. | obeys Raoult's law. |
| D. | may exhibit either positive or negative deviation from Raoult's law. |
| Answer» B. exhibits negative deviation from Raoult's law. | |
| 5790. |
Avogadro number is the number of molecules in one __________ of a gas. |
| A. | gram |
| B. | kilogram |
| C. | gm.mole |
| D. | litre |
| Answer» D. litre | |
| 5791. |
Simultaneous doubling of the absolute temperature of a gas and reduction of its pressure to half, will result in __________ in the volume of the gas. |
| A. | no change |
| B. | doubling |
| C. | l/4th reduction |
| D. | four fold increase |
| Answer» C. l/4th reduction | |
| 5792. |
pH value of an alkaline solution is |
| A. | 7 |
| B. | > 7 |
| C. | < 7 |
| D. | constant over a wide range |
| Answer» C. < 7 | |
| 5793. |
1 kg of calcium carbide (CaC2) produces about 0.41 kg of acetylene gas on treatment with water. How many hours of service can be derived from 1 kg of calcium carbide in an acetylene lamp burning 35 litres of gas at NTP per hour ? |
| A. | 5 |
| B. | 10 |
| C. | 15 |
| D. | 20 |
| Answer» C. 15 | |
| 5794. |
According to Raoult's law, "The vapor pressure exerted by component in a solution is proportional to the mole fraction of that component." Raoult's law is not applicable under the following assumption/condition. |
| A. | No component is concentrated at the surface of the solution. |
| B. | The component molecules are non polar and are of almost equal size. |
| C. | In the formation of solution, chemical combination/molecular association between unlike molecules takes place. |
| D. | The attractive forces between like and unlike molecules are almost equal. |
| Answer» D. The attractive forces between like and unlike molecules are almost equal. | |
| 5795. |
Internal energy of a substance comprises of the __________ energy. |
| A. | vibrational |
| B. | rotational |
| C. | translational |
| D. | all (a), (b) & (c) |
| Answer» E. | |
| 5796. |
The heat of adsorption of a gas caused by Van der Walls forces of attraction and capillarity is equal to the heat of |
| A. | normal condensation. |
| B. | wetting. |
| C. | sum of (a) and (b). |
| D. | difference of (a) and (b). |
| Answer» D. difference of (a) and (b). | |
| 5797. |
Raw Kerosene has a smoke point of 15 mm. After it is subjected to dearomatisation by liquid SO2 extraction (Edeleanu process), its smoke point may become __________ mm. |
| A. | 5 |
| B. | 10 |
| C. | 25 |
| D. | 100 |
| Answer» D. 100 | |
| 5798. |
Petroleum coke is commercially produced by the __________ process. |
| A. | hydrocracking |
| B. | visbreaking |
| C. | fluid catalytic cracking |
| D. | delayed coking |
| Answer» E. | |
| 5799. |
Crude oil produced by Indian oil fields are predominantly __________ in nature. |
| A. | paraffinic |
| B. | naphthenic |
| C. | asphaltic |
| D. | mixed base |
| Answer» D. mixed base | |
| 5800. |
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). | |