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.
| 1151. |
Which of the following constituents present in petroleum is responsible for ash formation? |
| A. | Nitrogen compounds |
| B. | Organometallic compounds |
| C. | Sulphur compounds |
| D. | Oxygen compounds |
| Answer» D. Oxygen compounds | |
| 1152. |
Most of the atmospheric air pollutants are present in large quantity in |
| A. | stratosphere |
| B. | thermosphere |
| C. | trophosphere |
| D. | mesosphere |
| Answer» D. mesosphere | |
| 1153. |
'Pneumoconiosis' is a disease caused by the inhalation of __________ dust. |
| A. | coal |
| B. | uranium ore |
| C. | iron ore |
| D. | lime |
| Answer» B. uranium ore | |
| 1154. |
The ratio of oxygen available to the oxygen required for stabilisation of sewage is called the |
| A. | bacterial stability factor. |
| B. | relative stability. |
| C. | biological oxygen demand (BOD). |
| D. | oxygen ion concentration. |
| Answer» C. biological oxygen demand (BOD). | |
| 1155. |
80% less than 200 mesh size particles are called |
| A. | smoke |
| B. | powder |
| C. | grit |
| D. | aggregates |
| Answer» C. grit | |
| 1156. |
Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal |
| A. | by chemical coagulation. |
| B. | in sedimentation tanks equipped with mechanical scrapper. |
| C. | in vacuum filter. |
| D. | in clarifiers. |
| Answer» C. in vacuum filter. | |
| 1157. |
TLV of ozone (O3) and phosgene (COCl2) in air is __________ ppm. |
| A. | 0.1 |
| B. | 25 |
| C. | 100 |
| D. | 1000 |
| Answer» B. 25 | |
| 1158. |
The widest explosive limit is of __________ , thereby making it the most explosive gas. |
| A. | acetylene |
| B. | petrol vapor |
| C. | hydrogen |
| D. | carbon monoxide |
| Answer» B. petrol vapor | |
| 1159. |
Aerobic biological oxidation ponds used for the purification of polluted water |
| A. | destroys/removes pathogen from the sewage. |
| B. | is not very effective for nonbiodegradable substances (e.g. ABS) containing effluents. |
| C. | destroys/removes pathogen much more effectively if the sewage is chlorinated. |
| D. | all (a), (b) & (c). |
| Answer» E. | |
| 1160. |
The commonest form of iron & manganese found in ground water as pollutant is in the form of their |
| A. | carbonates |
| B. | bi-carbonates |
| C. | chlorides |
| D. | sulphides |
| Answer» C. chlorides | |
| 1161. |
Polluted water having low BOD are most economically treated in |
| A. | sedimentation tanks |
| B. | oxidation ponds |
| C. | sludge digester |
| D. | clarifier |
| Answer» C. sludge digester | |
| 1162. |
Tri-sodium phosphate is used in boiler water treatment to reduce |
| A. | turbidity |
| B. | caustic embrittlement |
| C. | suspended silica |
| D. | dissolved oxygen |
| Answer» C. suspended silica | |
| 1163. |
Siderosis is a disease caused by the inhalation of __________ dust. |
| A. | coal |
| B. | silica |
| C. | iron |
| D. | none of these |
| Answer» D. none of these | |
| 1164. |
Phenolic water generated in coke ovens & by-product plant attached to an integrated steel plant containing phenol in concentration of less than 100 mg/litre can be removed by |
| A. | chlorination |
| B. | treating in biological oxygen pond |
| C. | chemical coagulation |
| D. | none of these |
| Answer» C. chemical coagulation | |
| 1165. |
Which of the following dust collection equipments is the least efficient (for sub-micronic particles) ? |
| A. | Dust catcher (gravity type) |
| B. | Cyclone separator |
| C. | Bag filter |
| D. | Hollow wet scrubber |
| Answer» B. Cyclone separator | |
| 1166. |
Bag filter design is predominantly dependent on gas temperature, as it affects the gas density & viscosity and the selection of filtering material. The pressure drop in a bag filter is |
| A. | inversely proportional to viscosity of gas. |
| B. | proportional to the viscosity & density of the gas. |
| C. | proportional to the pressure of the gas. |
| D. | both (b) and (c). |
| Answer» E. | |
| 1167. |
Turbidity of water is an indication of the presence of |
| A. | suspended inorganic matter |
| B. | dissolved solids |
| C. | floating solids |
| D. | dissolved gases |
| Answer» B. dissolved solids | |
| 1168. |
Presence of excess flourine in water causes |
| A. | dental cavity |
| B. | tooth decay |
| C. | fluorosis |
| D. | respiratory disease |
| Answer» D. respiratory disease | |
| 1169. |
Noise level heard at a distance of about 100 metres from a jet engine with after burner is about __________ decibels. |
| A. | 120 |
| B. | 140 |
| C. | 170 |
| D. | 200 |
| Answer» D. 200 | |
| 1170. |
During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum ? |
| A. | Idle running |
| B. | Acceleration |
| C. | Cruising |
| D. | Deaccelaration |
| Answer» B. Acceleration | |
| 1171. |
H2S present in gaseous stream can be removed by adsorption on |
| A. | silica gel |
| B. | active carbon |
| C. | bog iron |
| D. | limestone powder |
| Answer» D. limestone powder | |
| 1172. |
Inhalation of lead compounds present in automobile exhaust (using leaded petrol) causes |
| A. | blood poisoning. |
| B. | anaemia. |
| C. | nervous system disorder. |
| D. | all (a), (b) & (c). |
| Answer» E. | |
| 1173. |
Replenishment of dissolved oxygen in water stream polluted with industrial waste occurs by |
| A. | natural aeration of water stream. |
| B. | photosynthetic action of algae. |
| C. | both (a) & (b). |
| D. | neither (a) nor (b). |
| Answer» D. neither (a) nor (b). | |
| 1174. |
Maximum allowable concentration of CO2 in air for safe working is __________ ppm (parts per million). |
| A. | 50 |
| B. | 1000 |
| C. | 2000 |
| D. | 5000 |
| Answer» E. | |
| 1175. |
Tolerable limit of nitrogen oxides in air is __________ ppm. |
| A. | 0.1 |
| B. | 1 |
| C. | 5 |
| D. | 25 |
| Answer» D. 25 | |
| 1176. |
Iron & manganese present as pollutant in water can not be removed by |
| A. | ion exchange process. |
| B. | oxidation followed by settling & filtration. |
| C. | lime soda process or manganese zeolite process. |
| D. | chlorination. |
| Answer» E. | |
| 1177. |
In water chemical treatment plant, use of chloramines ensures |
| A. | disinfection. |
| B. | taste & odour control. |
| C. | weed control in reservoirs. |
| D. | removal of permanent hardness. |
| Answer» B. taste & odour control. | |
| 1178. |
In petroleum refining, the process used for conversion of hydrocarbons to aromatics is |
| A. | catalytic cracking |
| B. | catalytic reforming |
| C. | hydrotreating |
| D. | alkylation |
| Answer» C. hydrotreating | |
| 1179. |
Solvent used in the deasphalting process is |
| A. | furfurol |
| B. | phenol |
| C. | propane |
| D. | hexane |
| Answer» D. hexane | |
| 1180. |
Most commonly used crude heater before the fractionation tower in a refinery is the __________ heater. |
| A. | electric immersion |
| B. | pipestill |
| C. | steam coil |
| D. | none of these |
| Answer» C. steam coil | |
| 1181. |
Which of the following fractions of a crude oil will have the maximum gravity API (i.e. API) ? |
| A. | Diesel |
| B. | Gasoline |
| C. | Atmospheric gas oil |
| D. | Vacuum gas oil |
| Answer» C. Atmospheric gas oil | |
| 1182. |
True boiling point apparatus is used for the |
| A. | determination of characterisation factor. |
| B. | evaluation of oil stocks. |
| C. | determination of true vapour pressure. |
| D. | none of these. |
| Answer» C. determination of true vapour pressure. | |
| 1183. |
Tanks used for the storage of petroleum products (which are inflammable) should be painted with a __________ paint. |
| A. | black |
| B. | white |
| C. | red |
| D. | yellow |
| Answer» C. red | |
| 1184. |
Cetane number of diesel used in trucks may be about |
| A. | 50 |
| B. | 14 |
| C. | 35 |
| D. | 85 |
| Answer» B. 14 | |
| 1185. |
__________ test is done to find out the softening point of bitumen. |
| A. | Impact |
| B. | Ball and ring |
| C. | Flame |
| D. | Viscosity |
| Answer» C. Flame | |
| 1186. |
__________ determination is not a very significant and important test for gasoline. |
| A. | Gum & sulphur content |
| B. | Viscosity |
| C. | Octane number |
| D. | Reid vapor pressure |
| Answer» C. Octane number | |
| 1187. |
Which of the following has the lowest viscosity (at a given temperature) of all? |
| A. | Naphtha |
| B. | Kerosene |
| C. | Diesel |
| D. | Lube oil |
| Answer» B. Kerosene | |
| 1188. |
Diesel index.(an alternative index for expressing the quality of diesel) is |
| A. | determined by using a test engine. |
| B. | not related to aniline point. |
| C. | equal to cetane number plus 3. |
| D. | all (a), (b) & (c). |
| Answer» D. all (a), (b) & (c). | |
| 1189. |
Octane number of gasoline is a measure of its |
| A. | resistance to knock. |
| B. | ignition delay. |
| C. | ignition temperature. |
| D. | smoke point. |
| Answer» B. ignition delay. | |
| 1190. |
Catalyst used in catalytic reforming is |
| A. | platinum on alumina |
| B. | nickel |
| C. | iron |
| D. | aluminium chloride |
| Answer» B. nickel | |
| 1191. |
Pick out the additive property of a lube oil out of following. |
| A. | API gravity |
| B. | Specific gravity |
| C. | Viscosity |
| D. | Flashpoint |
| Answer» B. Specific gravity | |
| 1192. |
A good lubricant should have high |
| A. | viscosity index |
| B. | volatility |
| C. | pour point |
| D. | none of these |
| Answer» B. volatility | |
| 1193. |
Complete removal of __________ from gasoline is done by Unisol process using caustic soda and methyl alcohol. |
| A. | waxes |
| B. | mercaptans |
| C. | asphalt |
| D. | diolefins |
| Answer» C. asphalt | |
| 1194. |
The main use of heavy gas oil produced by the vacuum distillation unit is as a |
| A. | blending component for kerosene. |
| B. | blending component for petrol. |
| C. | feedstock for fluid catalytic cracking unit. |
| D. | none of these. |
| Answer» D. none of these. | |
| 1195. |
Stabilisation of gasoline (petrol) means |
| A. | removal of dissolved gases from it. |
| B. | increasing its oxidation stability. |
| C. | improving its lead susceptibility. |
| D. | increasing its vapour pressure. |
| Answer» B. increasing its oxidation stability. | |
| 1196. |
Viscosity index of a lubricating oil |
| A. | is the measure of its flash point. |
| B. | is the measure of variation of viscosity with temperature. |
| C. | should be low. |
| D. | none of these. |
| Answer» C. should be low. | |
| 1197. |
Visbreaking process is used mainly for making |
| A. | high cetane diesel |
| B. | high octane gasoline |
| C. | fuel oil |
| D. | smoke free kerosene |
| Answer» D. smoke free kerosene | |
| 1198. |
Crude oil is pumped by a __________ pump. |
| A. | gear |
| B. | centrifugal |
| C. | screw |
| D. | reciprocating |
| Answer» C. screw | |
| 1199. |
Smoke point of a test sample of kerosene is found to be 15 mm. On removal of __________ from it, the smoke point rises to 25 mm. |
| A. | <i>n</i> |
| B. | -paraffins |
| C. | olefins |
| D. | aromatics |
| E. | none of these |
| Answer» D. aromatics | |
| 1200. |
__________ is not an important refinery process for upgrading the quality of lubricating oil. |
| A. | Deoiling |
| B. | Solvent refinning |
| C. | Clay treatment |
| D. | Hydrotreatment |
| Answer» B. Solvent refinning | |