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.
| 7351. |
Reaction of phosphate rock with 98% H2SO4 produces |
| A. | orthophosphoric acid |
| B. | superphosphate |
| C. | white phosphorous |
| D. | none of these |
| Answer» B. superphosphate | |
| 7352. |
HPO3 is the chemical formula of __________ phosphoric acid. |
| A. | pyro |
| B. | ortho |
| C. | meta |
| D. | none of these |
| Answer» D. none of these | |
| 7353. |
In __________ converter for ammonia synthesis, the catalyst is arranged in the form of a single continuous bed. |
| A. | Fauser-Monte Catini |
| B. | Claude |
| C. | Udhe |
| D. | Kellog |
| Answer» C. Udhe | |
| 7354. |
Potassic fertilisers do not promote the development of |
| A. | stems & leaves during early stage of plant growth. |
| B. | starches of potatoes & grains. |
| C. | sugar of fruits & vegetables. |
| D. | fibrous materials of plants. |
| Answer» B. starches of potatoes & grains. | |
| 7355. |
The optimum size of the ammonia plant is __________ tons/day. |
| A. | 10 |
| B. | 100 |
| C. | 1000 |
| D. | 1000C. |
| Answer» D. 1000C. | |
| 7356. |
Main component of bone ash is |
| A. | calcium sulphate |
| B. | calcium phosphate |
| C. | calcium carbonate |
| D. | sodium phosphate |
| Answer» C. calcium carbonate | |
| 7357. |
Multistage operation (as in the case of catalytic oxidation of SO2) is not carried out for NH3 synthesis, because of |
| A. | comparatively higher pressure drop. |
| B. | high cost of the high pressure vessel used for the reactor. |
| C. | higher pumping cost. |
| D. | chances of entrainment and disturbance of catalyst bed. |
| Answer» C. higher pumping cost. | |
| 7358. |
Dehydration of ammonium carbamate produces |
| A. | urea |
| B. | biuret |
| C. | ammonia water |
| D. | none of these |
| Answer» B. biuret | |
| 7359. |
Ammonia synthesis reaction is |
| A. | exothermic |
| B. | endothermic |
| C. | autocatalytic |
| D. | none of these |
| Answer» B. endothermic | |
| 7360. |
Reaction of calcium fluorapatite with sulphuric acid produces |
| A. | ortho-phosphoric acid. |
| B. | simple superphosphate. |
| C. | triple superphosphate. |
| D. | red phosphorous. |
| Answer» C. triple superphosphate. | |
| 7361. |
Which of the following is not a commercially used feed-stock for the production of ammonia synthesis gas? |
| A. | Water |
| B. | Naphtha |
| C. | Tar |
| D. | Coal/coke oven gas |
| Answer» D. Coal/coke oven gas | |
| 7362. |
Triple superphosphate is made by reacting phosphate rock with __________ acid. |
| A. | phosphoric |
| B. | nitric |
| C. | sulphuric |
| D. | hydrochloric |
| Answer» B. nitric | |
| 7363. |
NPK fertiliser is a __________ fertiliser. |
| A. | complex |
| B. | mixed |
| C. | nitrogenous |
| D. | phosphatic |
| Answer» C. nitrogenous | |
| 7364. |
Reaction of __________ acid with phosphate rock produces superphosphates. |
| A. | hydrochloric |
| B. | sulphuric |
| C. | nitric |
| D. | phosphoric |
| Answer» C. nitric | |
| 7365. |
Reaction of nitric acid and sulphuric acid with phosphate rock produces |
| A. | nitrophosphate |
| B. | diammonium phosphate |
| C. | tricresyl phosphate |
| D. | tributyl phosphate |
| Answer» B. diammonium phosphate | |
| 7366. |
Hydrogen is recovered from coke oven gas on commercial scale (as practised in fertiliser plant at Rourkela) by |
| A. | adsorption on palladium. |
| B. | cryogenic operations (low temperature cooling). |
| C. | absorption (using ethanolamine or pyragalloll solution). |
| D. | none of these. |
| Answer» C. absorption (using ethanolamine or pyragalloll solution). | |
| 7367. |
The fertiliser plant getting hydrogen by electrolysis of water is situated at |
| A. | Namrup |
| B. | Nangal |
| C. | Rourkela |
| D. | Korba |
| Answer» C. Rourkela | |
| 7368. |
Which of the following does not come under the category of 'micro-nutrient' for plant growth? |
| A. | Chlorine |
| B. | Iron |
| C. | Boron |
| D. | Carbon |
| Answer» E. | |
| 7369. |
__________ is required more for leafy crops. |
| A. | Nitrogen |
| B. | Phosphorous |
| C. | Potassium |
| D. | Carbon |
| Answer» B. Phosphorous | |
| 7370. |
Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the |
| A. | osmotic pressure of the soil water becomes less than that of the plant sap. |
| B. | soil becomes too alkaline. |
| C. | osmotic pressure of the soil water becomes higher than that of the plant sap. |
| D. | soil becomes too acidic. |
| Answer» D. soil becomes too acidic. | |
| 7371. |
Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of |
| A. | phosphoric acid. |
| B. | superphosphate. |
| C. | phosphorous. |
| D. | triple superphosphate. |
| Answer» D. triple superphosphate. | |
| 7372. |
The atmospheric temperature during melting of ice/snow (in the atmosphere) |
| A. | decreases |
| B. | increases |
| C. | remains same |
| D. | may increase or decrease ; depends on the altitude where snow melts |
| Answer» B. increases | |
| 7373. |
The size of the tetrahedral void in the closest packing of atoms is __________ that of the octahedral void. |
| A. | equal to |
| B. | greater than |
| C. | less than |
| D. | either (a), (b) or (c); depends on the size of atom |
| Answer» D. either (a), (b) or (c); depends on the size of atom | |
| 7374. |
Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with be |
| A. | 9.5:1 |
| B. | 12.5:1 |
| C. | 15.5 :1 |
| D. | 18.5 : 1 |
| Answer» B. 12.5:1 | |
| 7375. |
Frost formation on the evaporator tubes in the domestic refrigerators |
| A. | can be prevented by proper design. |
| B. | decreased compressor power. |
| C. | causes heat loss due to poor heat transfer. |
| D. | is immaterial. |
| Answer» D. is immaterial. | |
| 7376. |
Function of feed check valve in a boiler is to |
| A. | facilitate circulation of high pressure feed water. |
| B. | check the water level in the boiler drum. |
| C. | prevent the back flow of water. |
| D. | regulate the water flow to boiler. |
| Answer» D. regulate the water flow to boiler. | |
| 7377. |
Which of the following has the highest modulus of elasticity (about 7 x 106 kg/cm2) ? |
| A. | High speed steel |
| B. | Stainless steel |
| C. | Tungsten carbide |
| D. | Superalloys |
| Answer» D. Superalloys | |
| 7378. |
Electrolytic reduction cell used for conversion of calcined Al2O3 to Al is a carbon lined furnace operating at 800-900 C. The purpose of electric current supplied to the furnace is to |
| A. | achieve very high purity of aluminium (99.9%). |
| B. | keep the electrolyte in liquid condition by the generation of heat. |
| C. | electrolytically dissociate alumina. |
| D. | both(b) & (c). |
| Answer» E. | |
| 7379. |
All radiations falling on a black body are |
| A. | refracted |
| B. | reflected |
| C. | transmitted |
| D. | absorbed |
| Answer» E. | |
| 7380. |
Screws are specified by their __________ diameters. |
| A. | minor |
| B. | major |
| C. | pitch |
| D. | none of these |
| Answer» C. pitch | |
| 7381. |
The stress at which extension of the material takes place more rapidly as compared to the increase in load is termed as the __________ point of the material. |
| A. | elastic |
| B. | ultimate |
| C. | yielding |
| D. | breaking |
| Answer» D. breaking | |
| 7382. |
With increase in pressure, the latent heat of steam |
| A. | increases. |
| B. | decreases. |
| C. | remains unchanged. |
| D. | data insufficient; can't be predicted. |
| Answer» C. remains unchanged. | |
| 7383. |
Styrofoam is the commercial name of |
| A. | polyurathene |
| B. | polystyrene |
| C. | polyacrylonitrile |
| D. | polybutadiene |
| Answer» C. polyacrylonitrile | |
| 7384. |
Ammonium phosphate is a __________ fertiliser. |
| A. | nitrogenous |
| B. | phosphatic |
| C. | complex |
| D. | mixed |
| Answer» E. | |
| 7385. |
Urea is a better fertilizer than ammonium sulphate, because |
| A. | it is cheaper. |
| B. | nitrogen content is higher. |
| C. | it is not poisonous. |
| D. | it is easy to manufacture. |
| Answer» C. it is not poisonous. | |
| 7386. |
Reaction of cresylic acid with __________ produces tricresyl phosphate. |
| A. | phosphorous pentoxide |
| B. | phosphorous oxychloride |
| C. | ammonium phosphate |
| D. | calcium phosphate |
| Answer» C. ammonium phosphate | |
| 7387. |
In the manufacture of urea, the intermediate chemical formed is |
| A. | biuret |
| B. | ammonium carbamate |
| C. | ammonium carbonate |
| D. | none of these |
| Answer» C. ammonium carbonate | |
| 7388. |
Nitrolime is chemically known as |
| A. | calcium nitrate |
| B. | ammonium nitrate |
| C. | calcium ammonium nitrate (CAN) |
| D. | none of these |
| Answer» D. none of these | |
| 7389. |
Gross national product (GNP) means the total value of __________ in a country. |
| A. | goods produced |
| B. | gold reserve |
| C. | earning of the citizens |
| D. | taxes paid |
| Answer» B. gold reserve | |
| 7390. |
Energy to be supplied to the radioactive nucleus for the emission of a neutron is __________ MeV. |
| A. | 0.8 |
| B. | 7.8 |
| C. | 200 |
| D. | 10000 |
| Answer» B. 7.8 | |
| 7391. |
The co-ordination number in simple cubic structure is |
| A. | 4 |
| B. | 6 |
| C. | 8 |
| D. | 12 |
| Answer» C. 8 | |
| 7392. |
Out of the following surfaces, the emis-sivity will be minimum for |
| A. | aluminium foil |
| B. | concrete |
| C. | plaster |
| D. | smooth glass |
| Answer» C. plaster | |
| 7393. |
The property of material, by which a given amount of energy is absorbed by it without plastic deformation, is called the |
| A. | resilience |
| B. | toughness |
| C. | ductility |
| D. | impact strength |
| Answer» B. toughness | |
| 7394. |
Addition of __________ to steel does not help in improving its machinability. |
| A. | sulphur |
| B. | silicon |
| C. | lead |
| D. | phosphorous |
| Answer» C. lead | |
| 7395. |
Chalcopyrite is an ore of |
| A. | lead |
| B. | aluminium |
| C. | copper |
| D. | zinc |
| Answer» D. zinc | |
| 7396. |
The following is employed as sacrificial anode to provide cathodic protection to ships, pipelines and storage tanks. |
| A. | Iron |
| B. | Copper |
| C. | Nickel |
| D. | Magnesium |
| Answer» E. | |
| 7397. |
Increasing the carbon content of steel |
| A. | reduces the upper shelf energy. |
| B. | increasing the ductility transition temperature. |
| C. | decreases brittleness. |
| D. | decreases hardness. |
| Answer» C. decreases brittleness. | |
| 7398. |
Out of the following, the most melleable material is |
| A. | copper |
| B. | aluminium |
| C. | wrought iron |
| D. | lead |
| Answer» E. | |
| 7399. |
Addition of silicon to aluminium improves its |
| A. | corrosion resistance |
| B. | machinability |
| C. | castability |
| D. | none of these |
| Answer» D. none of these | |
| 7400. |
Which of the following properties of a solid is not dependent on crystal imperfection ? |
| A. | Ductility |
| B. | Semiconductiyity |
| C. | Melting point |
| D. | Yield stress |
| Answer» D. Yield stress | |