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.
| 1201. |
Pick out the undesirable property for a solvent meant for dewaxing of lube oil. |
| A. | Complete miscibility with oil. |
| B. | High solubility of wax in the solvent. |
| C. | Both (a) and (b). |
| D. | Neither (a) nor (b). |
| Answer» D. Neither (a) nor (b). | |
| 1202. |
Which of the following is used as a catalyst in fluidised bed catalytic cracking ? |
| A. | Silica-magnesia |
| B. | Silica-alumina |
| C. | Bentonite clays |
| D. | All (a), (b) and (c) |
| Answer» E. | |
| 1203. |
Casing head gasoline is the liquid |
| A. | butane. |
| B. | propane. |
| C. | natural gas. |
| D. | gasoline separated from wet natural gas by compression. |
| Answer» B. propane. | |
| 1204. |
For gasoline, the flash point (<50 C) is determined by the |
| A. | Abel apparatus. |
| B. | Pensky-Marten's apparatus. |
| C. | Saybolt chromometer. |
| D. | none of these. |
| Answer» B. Pensky-Marten's apparatus. | |
| 1205. |
Flash point of atmospheric distillation residue is determined by __________ apparates. |
| A. | Pensky-Martens (closed cup type). |
| B. | Abel. |
| C. | Cleveland (open cup type) |
| D. | none of these. |
| Answer» D. none of these. | |
| 1206. |
Maximum sulphur percentage in low sulphur heavy stock (LSHS) furnace oil is about |
| A. | 0.1 |
| B. | 1 |
| C. | 2.5 |
| D. | 3.5 |
| Answer» C. 2.5 | |
| 1207. |
Pour point and freezing point is equal for |
| A. | petrol |
| B. | diesel |
| C. | water |
| D. | crude petroleum |
| Answer» D. crude petroleum | |
| 1208. |
In the atmospheric pressure crude distillation, the content of __________ from lighter fraction to heavier ones. |
| A. | sulphur increases |
| B. | sulphur decreases |
| C. | nitrogen decreases |
| D. | none of these |
| Answer» B. sulphur decreases | |
| 1209. |
Solution used in Doctor's treatment for the removal of mercaptans is |
| A. | sodium hydroxide |
| B. | sodium plumbite |
| C. | cupric chloride |
| D. | potassium isobutyrate |
| Answer» C. cupric chloride | |
| 1210. |
Flash point of motor gasoline may be around __________ C. |
| A. | 10 |
| B. | 45 |
| C. | 100 |
| D. | 150 |
| Answer» C. 100 | |
| 1211. |
__________ converts n-paraffins to i-paraffins. |
| A. | Alkylation |
| B. | Polymerisation |
| C. | Isomerisation |
| D. | none of these |
| Answer» D. none of these | |
| 1212. |
The colour of gasoline is an indication of its |
| A. | octane number. |
| B. | lead susceptibility. |
| C. | gum forming tendency & thoroughness of refining. |
| D. | none of these. |
| Answer» D. none of these. | |
| 1213. |
The octane number of aviation gasoline may be |
| A. | 79 |
| B. | 87 |
| C. | 97 |
| D. | >100 |
| Answer» E. | |
| 1214. |
Mercaptans are |
| A. | low boiling sulphur compounds. |
| B. | added in LPG cylinders to detect gas leakage by its smell. |
| C. | undesirable in petrol, as they reduce its octane number. |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 1215. |
Aerodynamic noise resulting from turbulent gas flow is the most prevalent source of valve noise in fluid ilow control. It is caused due to |
| A. | Reynold stresses |
| B. | shear forces |
| C. | both (a) & (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 1216. |
TLV of mercury in potable (drinking) water is about __________ ppm. |
| A. | 0.001 |
| B. | 0.1 |
| C. | 1 |
| D. | 5 |
| Answer» B. 0.1 | |
| 1217. |
Which is the best and the most effective method for the removal of organic contaminant present in the polluted water in very small quantity (say < 200 mg/litre)? |
| A. | Lagooning |
| B. | Activated carbon adsorption |
| C. | Biological oxidation pond |
| D. | Chemical coagulation |
| Answer» C. Biological oxidation pond | |
| 1218. |
Which is a secondary air pollutant ? |
| A. | Photochemical smog |
| B. | Sulphur dioxide |
| C. | Nitrogen dioxide |
| D. | Dust particles |
| Answer» B. Sulphur dioxide | |
| 1219. |
Fluorosis (a bone disease) is caused by the presence of high concentration of __________ in atmospheric air. |
| A. | hydrocarbons |
| B. | hydrogen flouride |
| C. | hydrogen sulphides |
| D. | nitrogen dioxide |
| Answer» C. hydrogen sulphides | |
| 1220. |
Threshold Limit Value (TLV) is the maximum allowable concentration (i.e. safe limit) of pollutants in air. Safe limit for SO2 in air is __________ ppm. |
| A. | 5 |
| B. | 500 |
| C. | 1000 |
| D. | 2000 |
| Answer» B. 500 | |
| 1221. |
The coking process normally mostly used in Indian oil refineries is the __________ coking process. |
| A. | delayed |
| B. | flexi |
| C. | fluid |
| D. | contact |
| Answer» B. flexi | |
| 1222. |
Hot water (0.01 m3 /min) enters the tube side of a counter current shell and tube heat exchanger at 80 C and leaves at 50 C. Cold oil (0.05 m3/min) of density 800 kg/m3 and specific heat of 2 kJ/kg.K enters at 20 C. The log mean temperature difference in C is approximately |
| A. | 32 |
| B. | 37 |
| C. | 45 |
| D. | 50 |
| Answer» B. 37 | |
| 1223. |
In a heat exchanger, floating head is provided to |
| A. | facilitate cleaning of the exchanger. |
| B. | increase the heat transfer area. |
| C. | relieve stresses caused by thermal expansion. |
| D. | increase log mean temperature gradient. |
| Answer» D. increase log mean temperature gradient. | |
| 1224. |
Leidenfrost point is a term concerned with the |
| A. | condensation of the saturated vapor on a cold surface. |
| B. | concentration of a corrosive solution by evaporation. |
| C. | heat transfer between two highly viscous liquids. |
| D. | boiling of a liquid on a hot surface. |
| Answer» E. | |
| 1225. |
A process stream of dilute aqueous solution flowing at the rate of10 Kg.s-1 is to be heated. Steam condensate at 95 C is available for heating purpose, also at a rate of 10 Kg.s-1. A 1 - 1 shell and tube heat exchanger is available. The best arrangement is |
| A. | counter flow with process stream on shell side. |
| B. | counter flow with process stream on tube side. |
| C. | parallel flow with process stream on shell side. |
| D. | parallel flow with process stream on tube side. |
| Answer» B. counter flow with process stream on tube side. | |
| 1226. |
Heat produced when a steady state current, I passes through an electrical conductor having resistance, 'R' is |
| A. | <i>IR</i> |
| B. | <i>I<sup>2</sup>R</i> |
| C. | <i>IR<sup>2</sup></i> |
| D. | <i>I<sup>2</sup>R<sup>2</sup></i> |
| Answer» C. <i>IR<sup>2</sup></i> | |
| 1227. |
Flash point of an oil gives an idea of the |
| A. | nature of boiling point diagram of the system. |
| B. | amount of low boiling fraction present. |
| C. | explosion hazards. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 1228. |
Furfural solvent extraction is used for upgrading (by dissolving aromatics) |
| A. | naphtha |
| B. | lubricating oils |
| C. | wax |
| D. | cracking feedstock |
| Answer» C. wax | |
| 1229. |
__________ is the most commonly used 'filter aid'. |
| A. | Diatomaceous earth |
| B. | Fuller's earth |
| C. | Vermiculite |
| D. | Semi-plastic clay |
| Answer» B. Fuller's earth | |
| 1230. |
Solvent used in duo-sol extraction for lube oil upgradation is a mixture of |
| A. | propane & phenol-cresol mixture. |
| B. | methyl ethyl ketone & glycol. |
| C. | phenol & furfural. |
| D. | propane & liquid sulphur dioxide. |
| Answer» B. methyl ethyl ketone & glycol. | |
| 1231. |
Exposure to small amount of __________ results in high blood pressure & heart disease in human beings. |
| A. | hydrogen sulphide |
| B. | mercury |
| C. | cadmium |
| D. | asbestos |
| Answer» D. asbestos | |
| 1232. |
Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by |
| A. | biological oxygen pond. |
| B. | radial settling tank (thickener) using coagulant (lime & ferrous sulphate). |
| C. | lagoons. |
| D. | filtration. |
| Answer» C. lagoons. | |
| 1233. |
Persons working in cement plants and limestone quarries are more prone to disease like |
| A. | cancer |
| B. | asthma |
| C. | silicosis |
| D. | flourosis (bone disease) |
| Answer» D. flourosis (bone disease) | |
| 1234. |
Particulates (< 1 m size) remaining suspended in air indefinitely and transported by wind currents are called |
| A. | fumes |
| B. | mists |
| C. | smoke |
| D. | aerosols |
| Answer» E. | |
| 1235. |
Operating principle of cyclone separator is based on the action of __________ dust particles. |
| A. | diffusion of |
| B. | centrifugal force on |
| C. | gravitational force on |
| D. | electrostatic force on |
| Answer» C. gravitational force on | |
| 1236. |
Diesel used in naval applications has a minimum cetane number of |
| A. | 25 |
| B. | 35 |
| C. | 45 |
| D. | 65 |
| Answer» D. 65 | |
| 1237. |
For the case of a fuel gas undergoing combustion with air, if the air/fuel ratio is increased, the adiabatic flame temperature will |
| A. | increase |
| B. | decrease |
| C. | increase or decrease depending on the fuel type |
| D. | not change |
| Answer» C. increase or decrease depending on the fuel type | |
| 1238. |
Which of the following will be unsuitable for dust cleaning from flue gas at 400 C from a pulverised coal fired boiler ? |
| A. | Multicyclones |
| B. | Bag filter |
| C. | Wet scrubber |
| D. | Hydrocyclones. |
| Answer» C. Wet scrubber | |
| 1239. |
Moisture loss is determined by the |
| A. | humidity of combustion air. |
| B. | moisture content of fuel. |
| C. | both (a) and (b). |
| D. | the water formed by combustion reaction. |
| Answer» D. the water formed by combustion reaction. | |
| 1240. |
Purity of coke means that, it is high in carbon and low in |
| A. | volatiles |
| B. | ash |
| C. | iron |
| D. | moisture |
| Answer» B. ash | |
| 1241. |
Out of the following, which is the most important parameter for the blast furnace grade coke ? |
| A. | CSR & CRI |
| B. | Ash content |
| C. | Moisture content |
| D. | Volatile matter content |
| Answer» B. Ash content | |
| 1242. |
Presence of nitrogen in combustion air does not reduce the |
| A. | amount of heat liberated. |
| B. | flame temperature. |
| C. | flue gas temperature. |
| D. | any of the above. |
| Answer» B. flame temperature. | |
| 1243. |
Emission of dense white smoke out of the chimney of a thermal power plant is an indication of the use of |
| A. | less air for combustion. |
| B. | correct amount of air for combustion. |
| C. | too much air for combustion. |
| D. | pulverised coal in boilers. |
| Answer» D. pulverised coal in boilers. | |
| 1244. |
Pick out the wrong statement.: |
| A. | Carburetted water gas is also called blue gas. |
| B. | Coals are divided in four species according to their carbon content in Seylor's classification. |
| C. | Carbonisation time in a by-product coke oven is about 16 hours. |
| D. | Gross and net calorific value of a fuel is the same, if it does not contain hydrogen or hydrocarbons. |
| Answer» B. Coals are divided in four species according to their carbon content in Seylor's classification. | |
| 1245. |
A good metallurgical coke should have very low |
| A. | sulphur & phosphorous content |
| B. | porosity |
| C. | fusion point of its ash |
| D. | hardness & strength |
| Answer» B. porosity | |
| 1246. |
The gasification reaction represented by, C + H2O = CO + H2, is |
| A. | exothermic |
| B. | endothermic |
| C. | catalytic |
| D. | autocatalytic |
| Answer» C. catalytic | |
| 1247. |
Insitu theory and drift theory are related to the |
| A. | origin of petroleum oil. |
| B. | origin of coal. |
| C. | coalification. |
| D. | variation of coal quality with depth. |
| Answer» C. coalification. | |
| 1248. |
Which of the following will generate maximum volume of product of complete combustion (Nm3/Nm3 of fuel) ? |
| A. | Carburetted water gas |
| B. | Blast furnace gas |
| C. | Natural gas |
| D. | Producers' gas |
| Answer» D. Producers' gas | |
| 1249. |
A reactor is generally termed as an autoclave, when it is a |
| A. | high pressure batch reactor. |
| B. | atmospheric pressure tank reactor. |
| C. | high pressure tubular reactor. |
| D. | atmospheric pressure CSTR. |
| Answer» B. atmospheric pressure tank reactor. | |
| 1250. |
A reversible liquid phase endothermic reaction is to be carried out in a plug flow reactor. For minimum reactor volume, it should be operated such that the temperature along the length |
| A. | decreases. |
| B. | increases. |
| C. | is at the highest allowable temperature throughout. |
| D. | first increases and then decreases. |
| Answer» D. first increases and then decreases. | |