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.
| 7301. |
Which of the following processes follows the hardening process for reducing the hardening strains & increasing the toughness of the steel part? |
| A. | Anodising |
| B. | Tempering |
| C. | Carburising |
| D. | Annealing |
| Answer» C. Carburising | |
| 7302. |
Heat required to raise the temperature of a body by 1 C is called its |
| A. | heat capacity. |
| B. | specific heat capacity. |
| C. | thermal conductivity. |
| D. | water equivalent. |
| Answer» B. specific heat capacity. | |
| 7303. |
Coating of zinc over steel is known as |
| A. | cladding |
| B. | galvanising |
| C. | anodising |
| D. | passivation |
| Answer» C. anodising | |
| 7304. |
'Flare tower' used in industry is meant for |
| A. | venting off (after burning) the excess inflammable/toxic gases at high pressure. |
| B. | absorbing the pollutant gases from the furnace exhaust. |
| C. | cooling of furnace exhaust gases. |
| D. | none of these. |
| Answer» B. absorbing the pollutant gases from the furnace exhaust. | |
| 7305. |
At room temperature, F.C.C. crystal structure is observed in |
| A. | lead |
| B. | cupro-nickel |
| C. | titanium |
| D. | tungsten |
| Answer» B. cupro-nickel | |
| 7306. |
The basic function of the drum in a boiler is to |
| A. | act as a storage for feed water. |
| B. | act as a storage for steam. |
| C. | separate steam from water. |
| D. | remove settling impurities from steam. |
| Answer» D. remove settling impurities from steam. | |
| 7307. |
Colloids can be purified by |
| A. | dialysis |
| B. | reverse osmosis |
| C. | coagulation |
| D. | peptization |
| Answer» B. reverse osmosis | |
| 7308. |
Nitrogen is not an essential component of |
| A. | protein |
| B. | urea |
| C. | oils & fats |
| D. | any of these |
| Answer» D. any of these | |
| 7309. |
In inventory control theory, the economic order quantity (EOQ) is the |
| A. | lot size corresponding to break even analysis. |
| B. | average level of inventory. |
| C. | optimum lot size. |
| D. | none of these. |
| Answer» D. none of these. | |
| 7310. |
The main charge in blast furnace is usually |
| A. | iron ore & coke. |
| B. | iron ore, coke & air. |
| C. | limestone, coke & iron ore. |
| D. | limestone, sand & iron ore. |
| Answer» D. limestone, sand & iron ore. | |
| 7311. |
During nitric acid manufacture, catalytic oxidation of ammonia at 800 C in presence of platinum catalyst produces nitrogen oxide. Conversion of NH3 to NO is about __________ percent. |
| A. | 38 |
| B. | 68 |
| C. | 82 |
| D. | 98 |
| Answer» E. | |
| 7312. |
Which of the following is not a measure component necessarily to be present in fertilisers? |
| A. | Nitrogen |
| B. | Potassium |
| C. | Phosphorous |
| D. | Sulphur |
| Answer» E. | |
| 7313. |
P2O5 content in superphosphate is about __________ percent. |
| A. | 30-35 |
| B. | 15-20 |
| C. | 65-70 |
| D. | 85-90 |
| Answer» C. 65-70 | |
| 7314. |
Neutralisation of nitric acid with ammonia to produce ammonium nitrate is a/an __________ reaction. |
| A. | catalytic |
| B. | endothermic |
| C. | exothermic |
| D. | autocatalytic |
| Answer» D. autocatalytic | |
| 7315. |
Temperature and pressure in urea autoclave is |
| A. | 120 C and 300 atm. |
| B. | 190 C and 200 atm. |
| C. | 400 C and 550 atm. |
| D. | 200 C and 10 atm. |
| Answer» C. 400 C and 550 atm. | |
| 7316. |
The most suitable fertiliser for accelerating seeding or fruit formation in later stages of plant growth is __________ fertiliser. |
| A. | nitrogenous |
| B. | phosphatic |
| C. | potassic |
| D. | none of these |
| Answer» C. potassic | |
| 7317. |
Catalyst used in the oxidation of ammonia is |
| A. | platinum-beryllium |
| B. | platinum-rhodium |
| C. | cobalt-molybdenum |
| D. | platinum-molybdenum |
| Answer» C. cobalt-molybdenum | |
| 7318. |
Ammonia synthesis gas is produced from fuel oil by |
| A. | steam reforming |
| B. | hydrocracking |
| C. | partial oxidation |
| D. | hydrogenation |
| Answer» D. hydrogenation | |
| 7319. |
Though kinetics of ammonia synthesis dictates the use of low temperature for high equilibrium conversion, yet it is kept moderately high (550 C), because at low temperature |
| A. | rate of reaction is very low. |
| B. | very high pressure is required resulting in costly pressure vessel. |
| C. | space velocity of gas is very low resulting in decreased conversion. |
| D. | none of these |
| Answer» B. very high pressure is required resulting in costly pressure vessel. | |
| 7320. |
Iron is not used alone as a catalyst in ammonia synthesis, because |
| A. | its activity declines rapidly, if heated to above 520 C. |
| B. | it decomposes ammonia. |
| C. | it gets oxidised above 500 C. |
| D. | none of these. |
| Answer» B. it decomposes ammonia. | |
| 7321. |
A mixture of phosphate rock __________ is heated in an electric furnace to produce phosphorous. |
| A. | salt & coke |
| B. | sand & coke |
| C. | and coke |
| D. | and sand |
| Answer» C. and coke | |
| 7322. |
A fertiliser plant is classified as a gas based fertiliser plant, when it uses __________ gas as a source of hydrogen for the manufacture of ammonia. |
| A. | coke oven |
| B. | producer |
| C. | natural |
| D. | coal |
| Answer» D. coal | |
| 7323. |
Fertilizer plant getting its hydrogen requirement partly from coke oven gas is situated at |
| A. | Rourkela (under SAIL) |
| B. | Barauni (under HFC) |
| C. | Nangal (under NFL) |
| D. | Talchar (under FCI) |
| Answer» B. Barauni (under HFC) | |
| 7324. |
Nitrogen content of a nitrogenous fertiliser is 35%. It could be |
| A. | urea |
| B. | ammonium nitrate |
| C. | calcium ammonium nitrate (CAN) |
| D. | ammonium sulphate |
| Answer» C. calcium ammonium nitrate (CAN) | |
| 7325. |
Fertiliser produced during soda ash manufacture by dual process is ammonium |
| A. | chloride |
| B. | sulphate |
| C. | nitrate |
| D. | none of these |
| Answer» B. sulphate | |
| 7326. |
Which of the following fertilisers is required for the development of fibrous materials of the plants and of the sugar of vegetable & fruits ? |
| A. | Nitrogenous fertilisers |
| B. | Phosphatic fertilisers |
| C. | Potassic fertiliser |
| D. | None of these |
| Answer» D. None of these | |
| 7327. |
Which of the following solvents is used for the extraction of H3PO4 from CaCl2 solution during manufacture of ortho-phosphoric acid by wet process employing hydrochloric acid leaching? |
| A. | Iso propyl alcohol |
| B. | Butyl alcohol |
| C. | Toluene |
| D. | Hexane |
| Answer» C. Toluene | |
| 7328. |
Bio-fertilisers are cheaper, renewable and pollution free. They improve the __________ of the soil. |
| A. | nutrient supply |
| B. | texture |
| C. | water holding capacity |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 7329. |
Plant tranquillisers |
| A. | hold back stem growth and halt plants at a desired height. |
| B. | cause early maturation of plants. |
| C. | accelerate ripening of food and grain. |
| D. | produce seedless fruit. |
| Answer» B. cause early maturation of plants. | |
| 7330. |
Dehydration of ammonium carbamate to yield urea is a/an __________ reaction. |
| A. | exothermic |
| B. | endothermic |
| C. | autocatalytic |
| D. | catalytic |
| Answer» C. autocatalytic | |
| 7331. |
Triple superphosphate which contains about 46% P2O5 is produced by the reaction of phosphate rock with ortho phosphoric acid of____percent concentration. |
| A. | 25-28 |
| B. | 52-54 |
| C. | 75-80 |
| D. | > 98 |
| Answer» C. 75-80 | |
| 7332. |
NPK means a __________ fertiliser. |
| A. | mixed |
| B. | potassic |
| C. | liquid |
| D. | solid |
| Answer» B. potassic | |
| 7333. |
Potassic fertilisers |
| A. | are useful during early stage of the plant growth. |
| B. | stimulate early growth and accelerate seeding. |
| C. | help in development of starches of potatoes and grain. |
| D. | none of these. |
| Answer» D. none of these. | |
| 7334. |
Out of the following, N2 content is minimum in |
| A. | urea |
| B. | ammonium nitrate |
| C. | ammonium sulphate |
| D. | ammonium chloride |
| Answer» D. ammonium chloride | |
| 7335. |
Which of the following nitrogenous fertilisers has the highest percentage of nitrogen ? |
| A. | Calcium nitrate |
| B. | Calcium ammonium nitrate (CAN) |
| C. | Urea |
| D. | Ammonium sulphate |
| Answer» D. Ammonium sulphate | |
| 7336. |
Nitrolime is |
| A. | calcium nitrate. |
| B. | calcium ammonium nitrate. |
| C. | a mixture of nitric acid and lime. |
| D. | a mixture of ammonium nitrate and calcium nitrate. |
| Answer» C. a mixture of nitric acid and lime. | |
| 7337. |
In ammonia synthesis (N2 + 3H2 = 2NH3), there is a decrease in total volume, hence to get high equilibrium conversion, the reaction should be carried out at |
| A. | low pressure. |
| B. | high pressure. |
| C. | very high temperature. |
| D. | atmospheric pressure; as the pressure has no effect on conversion. |
| Answer» C. very high temperature. | |
| 7338. |
Coal based fertiliser plants at Ramagundam (Andhra Pradesh) and Talchar (Orissa) |
| A. | use coal for heating purpose. |
| B. | gasify coal to get hydrogen from coal gas. |
| C. | use coal as filler in fertiliser. |
| D. | use coal as conditioner in fertiliser. |
| Answer» C. use coal as filler in fertiliser. | |
| 7339. |
Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of __________ this is normally not done. |
| A. | increased biuret formation |
| B. | high corrosion rate |
| C. | increased cost of equipment |
| D. | all (a), (b) & (c) |
| Answer» E. | |
| 7340. |
Rock phosphate constitutes mainly of |
| A. | fluorapatite |
| B. | di-calcium phosphate |
| C. | mono-calcium phosphate |
| D. | di-ammonium phosphate |
| Answer» B. di-calcium phosphate | |
| 7341. |
I argest capacity nitrogenous fertiliser plants (2700 tons of NH3 per day) (2 Nos) in India are located at |
| A. | Thal-Vaishet (under RCF in Maharashtra) and Hazira (under IFFCO in Gujarat). |
| B. | Talchar (Orissa) and Ramagundam (A.P.) both under FCI. |
| C. | Korba (M.P.) and Talchar (Orissa) both under FCI. |
| D. | Haldia (W.B) and Namrup (Assam) both under HFC. |
| Answer» B. Talchar (Orissa) and Ramagundam (A.P.) both under FCI. | |
| 7342. |
Nitrogen content of urea is about __________ percent. |
| A. | 10 |
| B. | 46 |
| C. | 80 |
| D. | 94 |
| Answer» C. 80 | |
| 7343. |
__________ is the most suitable fertiliser for paddy. |
| A. | Urea |
| B. | Ammonium sulphate |
| C. | Superphosphate |
| D. | Potassium nitrate |
| Answer» C. Superphosphate | |
| 7344. |
Phosphatic fertilisers |
| A. | are useful during early stage of the plant growth. |
| B. | accelerate fruit formation in later stages of growth. |
| C. | lessen the effect of excessive nitrogen application. |
| D. | none of these |
| Answer» C. lessen the effect of excessive nitrogen application. | |
| 7345. |
Maximum nitrogen percentage is in |
| A. | ammonium sulphate. |
| B. | calcium ammonium nitrate. |
| C. | urea. |
| D. | liquid ammonia. |
| Answer» E. | |
| 7346. |
Nitrogen content in ammonium sulphate (a fertiliser) is around __________ percent. |
| A. | 5 |
| B. | 20 |
| C. | 50 |
| D. | 65 |
| Answer» C. 50 | |
| 7347. |
Monte catini process is used for the manufacture of |
| A. | nitric acid |
| B. | phosphoric acid |
| C. | urea |
| D. | calcium ammonium nitrate (CAN) |
| Answer» D. calcium ammonium nitrate (CAN) | |
| 7348. |
H4P2O7 is the chemical formula of __________ phosphoric acid. |
| A. | pyro |
| B. | ortho |
| C. | meta |
| D. | none of these |
| Answer» B. ortho | |
| 7349. |
Ammonium nitrate (is mixed with limestone) is not used as fertiliser as such, because |
| A. | it is hygroscopic and explosive in nature. |
| B. | it is highly acidic in nature. |
| C. | it is a liquid at room temperature. |
| D. | its nitrogen content is very less. |
| Answer» B. it is highly acidic in nature. | |
| 7350. |
Heating of orthophosphoric acid to about 900 C, produces |
| A. | metaphosphoric acid |
| B. | pyrophosphoric acid |
| C. | no change in it |
| D. | none of these |
| Answer» B. pyrophosphoric acid | |