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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.
| 7451. |
Raw materials for nitric acid manufacture are |
| A. | hydrogen peroxide, air and water. |
| B. | anhydrous ammonia and air. |
| C. | anhydrous ammonia, air and water. |
| D. | wet ammonia, air and water. |
| Answer» D. wet ammonia, air and water. | |
| 7452. |
Biuret formation in urea is kept at minimum (< 1 %), because it is |
| A. | corrosive in nature. |
| B. | toxic and harmful to some crops. |
| C. | helpful in decomposition of urea. |
| D. | explosive in nature. |
| Answer» C. helpful in decomposition of urea. | |
| 7453. |
Catalyst used in desulphurisation of naphtha is |
| A. | Co-Mo |
| B. | Pt-Rh |
| C. | silica gel |
| D. | nickel |
| Answer» B. Pt-Rh | |
| 7454. |
Reaction of orthophosphoric acid with phosphate rock produces |
| A. | superphosphate |
| B. | triple superphosphate |
| C. | metaphosphoric acid |
| D. | monoammonium phosphate |
| Answer» C. metaphosphoric acid | |
| 7455. |
Temperature and pressure in ammonia converter is |
| A. | 200 atm, 1000 C |
| B. | 450 atm, 200 C |
| C. | 450 atm, 550 C |
| D. | 450 atm, 1000 C |
| Answer» D. 450 atm, 1000 C | |
| 7456. |
pH value of soil is maintained at __________ by the addition of fertiliser for optimum growth and health of the plant. |
| A. | 4-5 |
| B. | 7-8 |
| C. | 9-10 |
| D. | 12-13 |
| Answer» C. 9-10 | |
| 7457. |
Oxidation of ammonia is |
| A. | exothermic |
| B. | endothermic |
| C. | non-catalytic |
| D. | autocatalytic |
| Answer» B. endothermic | |
| 7458. |
While the oxy-acetylene flame produces a temperature of 3200 C, the temperature produced by oxy-hydrogen flame is about __________ C. |
| A. | 1800 |
| B. | 2000 |
| C. | 2400 |
| D. | 3000 |
| Answer» C. 2400 | |
| 7459. |
Urea (a nitrogeneous fertiliser) is produced from carbon dioxide and |
| A. | nitric acid |
| B. | ammonia |
| C. | ammonium nitrate |
| D. | nitric oxide |
| Answer» C. ammonium nitrate | |
| 7460. |
A material having good damping property is likely to have |
| A. | greater defect density. |
| B. | fine grained structure. |
| C. | lesser defect density. |
| D. | high tensile strength. |
| Answer» B. fine grained structure. | |
| 7461. |
Exposure to __________ accelarates the degradation of plastics. |
| A. | ultraviolet radiation |
| B. | high atmospheric temperature |
| C. | high ambient temperature |
| D. | damp atmosphere |
| Answer» B. high atmospheric temperature | |
| 7462. |
Steel produced from phosphatic iron is __________ in nature. |
| A. | malleable |
| B. | ductile |
| C. | brittle |
| D. | tough |
| Answer» D. tough | |
| 7463. |
__________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700 C. |
| A. | Vaneering |
| B. | Galvanising |
| C. | Electroplating |
| D. | Calorising |
| Answer» E. | |
| 7464. |
For the Stoke's law to be valid in the case of a falling sphere in a fluid, the |
| A. | Reynolds number (based on sphere diameter) should be < 1. |
| B. | flow around the sphere should be in turbulent region. |
| C. | sphere must be metallic. |
| D. | fluid density should be constant. |
| Answer» D. fluid density should be constant. | |
| 7465. |
Tin plated iron and galvanised iron are generally produced by |
| A. | vaporising |
| B. | hot dipping |
| C. | electroplating |
| D. | spraying |
| Answer» C. electroplating | |
| 7466. |
In a drilling process, the metal is removed by both shearing & extrusion. General purpose drills are made of |
| A. | stainless steel |
| B. | mild steel |
| C. | high speed steel |
| D. | high carbon steel |
| Answer» D. high carbon steel | |
| 7467. |
Dezincification is a form of corrosion espe-cially applicable to |
| A. | brass |
| B. | nichrome |
| C. | stainless steel |
| D. | monel |
| Answer» B. nichrome | |
| 7468. |
Which of the following materials is not suitable as a die material for wire drawing? |
| A. | Diamond |
| B. | Tungsten carbide |
| C. | Tool steel |
| D. | Bronze |
| Answer» E. | |
| 7469. |
By X-ray diffraction, it is not possible to determine the |
| A. | preferred orientation. |
| B. | residual localised stresses. |
| C. | particle size. |
| D. | ordered arrangement of magnetic moments. |
| Answer» C. particle size. | |
| 7470. |
Catalytic ammonia synthesis reaction as in Haber's process is |
| A. | endothermic |
| B. | exothermic |
| C. | irreversible |
| D. | none of these |
| Answer» C. irreversible | |
| 7471. |
Gas based fertiliser plants use |
| A. | natural gas as a source of hydrogen. |
| B. | natural gas as heating medium. |
| C. | coal gas as a source of hydrogen. |
| D. | coal gas as heating medium. |
| Answer» B. natural gas as heating medium. | |
| 7472. |
Catalyst used in steam reforming of naphtha is |
| A. | bauxite |
| B. | cobalt |
| C. | nickel oxide on alumina support |
| D. | chromium |
| Answer» D. chromium | |
| 7473. |
Which of the following fertilisers contains the least percentage of nitrogen? |
| A. | Liquid ammonia |
| B. | Urea |
| C. | Ammonium phosphate |
| D. | Ammonium sulphate |
| Answer» D. Ammonium sulphate | |
| 7474. |
In the manufacture of H3 PO4 (ortho), ; strong H2 SO4 leaching wet process as compared to electric furnace process |
| A. | uses lower grade phosphate rock. |
| B. | requires lower capital investment in the plant. |
| C. | produces lower purity acid. |
| D. | is very costly. |
| Answer» D. is very costly. | |
| 7475. |
Earing is a defect found in steels after the following metal working operation (s). |
| A. | Deep drawing |
| B. | Rolling |
| C. | Extrusion |
| D. | Wire drawing |
| Answer» B. Rolling | |
| 7476. |
For a small scale toy factory, the fixed cost per month is Rs. 5000/-. The variable cost per toy is Rs. 20 and sales price is Rs. 30 per toy. The break even production per month will be __________ toys. |
| A. | 250 |
| B. | 500 |
| C. | 1000 |
| D. | 3000 |
| Answer» C. 1000 | |
| 7477. |
Hydrogen can be |
| A. | used in I.C. engines as fuel. |
| B. | liquefied & stored under cryogenic conditions. |
| C. | produced by electrolysis of water. |
| D. | all(a), (b) & (c). |
| Answer» E. | |
| 7478. |
Internal energy of a gas obeying Vanderwall's equation of state, , depends upon its |
| A. | pressure & temperature. |
| B. | pressure & specific volume. |
| C. | temperature & specific volume. |
| D. | temperature only. |
| Answer» B. pressure & specific volume. | |
| 7479. |
__________ wire is never used for making the heating element. |
| A. | Nichrome |
| B. | Kanthal |
| C. | Invar |
| D. | None of these |
| Answer» D. None of these | |
| 7480. |
__________ cycle is the most efficient thermodynamic cycle. |
| A. | Diesel |
| B. | Otto |
| C. | Rankine |
| D. | Carnot |
| Answer» E. | |
| 7481. |
Dew point of air indicates its |
| A. | moisture content |
| B. | dryness |
| C. | latent heat |
| D. | coolness |
| Answer» B. dryness | |
| 7482. |
Out of the following, __________ waves have the largest wavelength. |
| A. | radio |
| B. | light |
| C. | X-ray |
| D. | Gamma-ray |
| Answer» B. light | |
| 7483. |
Which of the following is not found in iron-carbon equilibrium diagram ? |
| A. | Curie point |
| B. | Peritectic point |
| C. | Eutectic point |
| D. | Eutectoid point |
| Answer» B. Peritectic point | |
| 7484. |
Nitrogen compounds are not used in the manufacture of |
| A. | fertilisers |
| B. | gun powder |
| C. | tip of match sticks |
| D. | explosive |
| Answer» D. explosive | |
| 7485. |
Wave length of X-rays is about 1 angstron, however it can not pass through a sheet of |
| A. | paper |
| B. | cloth |
| C. | lead |
| D. | aluminium |
| Answer» D. aluminium | |
| 7486. |
Alloying elements present in Hayness stel-lite, which has superior performance than high speed steel, are |
| A. | nickel, cobalt & chromium. |
| B. | tungsten, chromium & cobalt. |
| C. | manganese, chromium & cobalt. |
| D. | tungsten, molybdenum & nickel. |
| Answer» C. manganese, chromium & cobalt. | |
| 7487. |
The minimum and the maximum number of members required to form a Private Limited Joint Stock Company are respectively |
| A. | 7 and 30 |
| B. | 10 and 50 |
| C. | 2 and 50 |
| D. | 13 and 55 |
| Answer» D. 13 and 55 | |
| 7488. |
The leaching solvent used in Baeyer's process for the purification of bauxite is |
| A. | ammonium hydroxide |
| B. | sodium carbonate |
| C. | sodium hydroxide |
| D. | ammonium carbonate |
| Answer» C. sodium hydroxide | |
| 7489. |
Austempering process results in the formation of __________ structure. |
| A. | martensitic |
| B. | bainitic |
| C. | carburised |
| D. | stressed |
| Answer» C. carburised | |
| 7490. |
Silicon crystal can be converted to p-type semi-conductor by doping with |
| A. | phosphorous |
| B. | nitrogen |
| C. | carbon |
| D. | boron |
| Answer» E. | |
| 7491. |
Large diameter reinforced cement concrete (RCC) pipes are generally joined by __________ joint. |
| A. | flanged iron |
| B. | collar |
| C. | flexible |
| D. | expansion |
| Answer» C. flexible | |
| 7492. |
Increase in the entropy of a system represents the |
| A. | degradation of energy. |
| B. | decrease in system pressure. |
| C. | increase in the availability of energy. |
| D. | increase in the temperature. |
| Answer» B. decrease in system pressure. | |
| 7493. |
Property responsible for the talcum powder to cling to the skin is the |
| A. | capillary action |
| B. | adhesion |
| C. | cohesion |
| D. | surface tension |
| Answer» C. cohesion | |
| 7494. |
__________ has a negative co-efficient of linear expansion. |
| A. | Iron |
| B. | Copper |
| C. | Rubber |
| D. | Nickel |
| Answer» C. Rubber | |
| 7495. |
The noble metals |
| A. | are exemplified by Na, K and Li. |
| B. | do not resist corrosion very strongly. |
| C. | are the lowermost in the electro-chemical series of metals. |
| D. | none of these. |
| Answer» D. none of these. | |
| 7496. |
Which of the following is an example of cathodic protection of metals against corrosion ? |
| A. | Painted steel |
| B. | Galvanised iron |
| C. | Case hardened steel |
| D. | Lead lined reactor |
| Answer» C. Case hardened steel | |
| 7497. |
Thermal efficiency of an internal combustion engine is around __________ percent. |
| A. | 8 |
| B. | 35 |
| C. | 65 |
| D. | 80 |
| Answer» C. 65 | |
| 7498. |
Pick out the correct combination about the role of various additives used in polymers. |
| A. | Plasticiser : increases the polymer strength. |
| B. | Heat stabiliser : increases the maximum service temperature. |
| C. | Fillers: Does not affect the property of polymer but increases its weight. |
| D. | Lubricants: increases the flexibility of polymers. |
| Answer» D. Lubricants: increases the flexibility of polymers. | |
| 7499. |
__________ property of steel increases by addition of large amount of silicon in it. |
| A. | Mechanical |
| B. | Machining |
| C. | Magnetic |
| D. | Refractory |
| Answer» D. Refractory | |
| 7500. |
__________ stress can not be sustained by a fluid in equilibrium. |
| A. | Shear |
| B. | Tensile |
| C. | Compressive |
| D. | none of these |
| Answer» B. Tensile | |