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.
| 2851. |
__________ is used as a flux in the extraction of iron from iron ore (hametite) in blast furnace. |
| A. | Bauxite |
| B. | Limestone |
| C. | Quartz |
| D. | Manganese |
| Answer» C. Quartz | |
| 2852. |
Gun powder uses |
| A. | sulphur |
| B. | charcoal |
| C. | potassium nitrate |
| D. | all (a), (b), & (c) |
| Answer» E. | |
| 2853. |
Dichloro diphenyl __________ is the full form of DDT (an insecticide). |
| A. | tetrachloroethane |
| B. | trichloroethane |
| C. | tetrachloromethane |
| D. | trichloromethane |
| Answer» C. tetrachloromethane | |
| 2854. |
The basic difference between vegetable oils and fats is in their |
| A. | density |
| B. | chemical properties |
| C. | physical state |
| D. | composition |
| Answer» D. composition | |
| 2855. |
The temperature in the calcium carbide furnace is __________ C. |
| A. | 200-300 |
| B. | 700-850 |
| C. | 2000-2200 |
| D. | 4000-4500 |
| Answer» D. 4000-4500 | |
| 2856. |
A substance produced by a living organism and capable of anti-microbial activity is called a/an |
| A. | antibiotic |
| B. | antiseptic |
| C. | disinfectant |
| D. | none of these |
| Answer» B. antiseptic | |
| 2857. |
Deaeration of water in its treatment is necessary, as it |
| A. | minimises its turbidity. |
| B. | helps in controlling its taste and odour. |
| C. | minimises its corrosiveness. |
| D. | none of these. |
| Answer» D. none of these. | |
| 2858. |
Hydrochloric acid is also known as |
| A. | oil of vitriol |
| B. | muriatic acid |
| C. | strong organic acid |
| D. | green acid |
| Answer» C. strong organic acid | |
| 2859. |
Aryl benzene sulphonate (ABS) is a |
| A. | detergent. |
| B. | plasticiser for unsaturated polyester. |
| C. | starting material for the synthesis of glycerine. |
| D. | coating ingredient for photographic film. |
| Answer» B. plasticiser for unsaturated polyester. | |
| 2860. |
Adipic acid is an intermediate in the manufacture of |
| A. | perspex |
| B. | nylon-66 |
| C. | polystyrene |
| D. | bakelite |
| Answer» C. polystyrene | |
| 2861. |
Grignard reagent is chemically known as |
| A. | ethyl magnesium chloride. |
| B. | methyl magnesium chloride. |
| C. | dichlorophenol. |
| D. | monochloro acetic acid. |
| Answer» B. methyl magnesium chloride. | |
| 2862. |
The function of gypsum addition during cement making is to |
| A. | increase the density of cement. |
| B. | decrease the cement setting rate. |
| C. | both (a) and (b). |
| D. | neither (a) nor (b). |
| Answer» C. both (a) and (b). | |
| 2863. |
Low purity oxygen is used for |
| A. | L.D. steel making. |
| B. | cutting and welding of metals. |
| C. | medicinal purposes. |
| D. | chemical oxidation processes. |
| Answer» E. | |
| 2864. |
__________ is produced using molasses as the starting raw material. |
| A. | Methyl alcohol |
| B. | Ethyl alcohol |
| C. | Benzol |
| D. | Dimethyl ether |
| Answer» C. Benzol | |
| 2865. |
Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have |
| A. | high electrical insulation properties. |
| B. | sharp melting points. |
| C. | low co-efficient of thermal expansion. |
| D. | compressive strength much greater than their tensile strengths. |
| Answer» C. low co-efficient of thermal expansion. | |
| 2866. |
Chemical name of Grignard reagent is |
| A. | sodium thiosulphate. |
| B. | ethyl magnesium chloride. |
| C. | sodium sulphite. |
| D. | sodium bicarbonate. |
| Answer» C. sodium sulphite. | |
| 2867. |
Which of the following processes is absent in glass manufacturing process ? |
| A. | Sintering |
| B. | Annealing |
| C. | Shaping or forming |
| D. | Melting |
| Answer» B. Annealing | |
| 2868. |
Production of one ton of dry paper pulp requires about __________ tons of bamboo or wood. |
| A. | 1 |
| B. | 2.5 |
| C. | 5 |
| D. | 10 |
| Answer» C. 5 | |
| 2869. |
Dacron (or terylene) fibres as compared to nylon'fibres have |
| A. | better heat & acid resistant properties. |
| B. | poorer resistance to alkalis. |
| C. | poorer dyeability. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 2870. |
Concentration of sulphide ores is done usually by |
| A. | roasting |
| B. | smelting |
| C. | froth floatation |
| D. | electro magnetic separation |
| Answer» D. electro magnetic separation | |
| 2871. |
Dacron is a/an |
| A. | polyester |
| B. | unsaturated polyster |
| C. | polyamide |
| D. | inorganic polymer |
| Answer» B. unsaturated polyster | |
| 2872. |
Sodium carbonate (soda ash) is not used in the manufacture of |
| A. | fire extinguishers |
| B. | sugar |
| C. | baking powder |
| D. | detergents |
| Answer» E. | |
| 2873. |
Nylon 6-6 is manufactured from |
| A. | hexamethylene diamine and adipic acid. |
| B. | hexamethylene diamine and maleic anhydride. |
| C. | caprolactum. |
| D. | dimethyl terephthalate and ethylene glycol. |
| Answer» B. hexamethylene diamine and maleic anhydride. | |
| 2874. |
Nitrogen is an essential component of |
| A. | mineral salts |
| B. | carbohydrates |
| C. | fats |
| D. | proteins |
| Answer» E. | |
| 2875. |
__________ nature of hypo (sodium thiosulphate) makes it useful in photography. |
| A. | Oxidising |
| B. | Reducing |
| C. | Complex forming |
| D. | Photochemical |
| Answer» D. Photochemical | |
| 2876. |
__________ is an ore of lead. |
| A. | Quartz |
| B. | Galena |
| C. | Siderite |
| D. | Chalcopyrite |
| Answer» C. Siderite | |
| 2877. |
Which of the following is an yellow pigment ? |
| A. | Titanium dioxide |
| B. | Ferrous sulphate |
| C. | Lead chromates |
| D. | Zinc sulphides |
| Answer» D. Zinc sulphides | |
| 2878. |
Catalytic oxidation of toluene produces |
| A. | styrene |
| B. | phenol |
| C. | benzene |
| D. | tri-nitro-toluene |
| Answer» C. benzene | |
| 2879. |
SO2 is bubbled through hot sugar cane juice to |
| A. | act as an acidifying agent. |
| B. | increase its concentration. |
| C. | increase the amount of molasses. |
| D. | increase the crystal size. |
| Answer» B. increase its concentration. | |
| 2880. |
Fatty material used in soap making is |
| A. | fatty acid |
| B. | fatty alcohols |
| C. | tallow |
| D. | detergents |
| Answer» D. detergents | |
| 2881. |
Which of the following paper does not require a filler during manufacture ? |
| A. | Bond paper |
| B. | Writing paper |
| C. | Blotting paper |
| D. | Coloured paper |
| Answer» D. Coloured paper | |
| 2882. |
Industrial production of chloroform requires acetone and |
| A. | phosgene |
| B. | calcium hypochlorite |
| C. | chlorine |
| D. | ammonium chloride |
| Answer» C. chlorine | |
| 2883. |
Pencillin, an antibiotic drug was discovered by |
| A. | Alexender |
| B. | Flaming |
| C. | Dr. Zivago |
| D. | none of these |
| Answer» B. Flaming | |
| 2884. |
Styrene (a monomer for the production of polystyrene) is commercially produced by |
| A. | catalytic dehydrogenation of ethyl benzene. |
| B. | dehydration of ethyl alcohol followed by hydrogenation. |
| C. | reacting ethylene oxide with acetal-dehyde. |
| D. | fermentation of starch. |
| Answer» B. dehydration of ethyl alcohol followed by hydrogenation. | |
| 2885. |
Hydrogenation of oil takes place in a/an __________ reactor. |
| A. | autothermal |
| B. | trickle bed |
| C. | plug flow |
| D. | none of these |
| Answer» C. plug flow | |
| 2886. |
Sugar content in sugarcane on cane basis is about __________ percent by weight. |
| A. | 1 to 5 |
| B. | 5 to 10 |
| C. | 15 to 20 |
| D. | 20 to 30 |
| Answer» C. 15 to 20 | |
| 2887. |
The major use of butadiene is |
| A. | as a plasticiser for unsaturated polyester. |
| B. | in the manufacture of synthetic rubber. |
| C. | as an anti-skinning agent in paint. |
| D. | none of these. |
| Answer» C. as an anti-skinning agent in paint. | |
| 2888. |
The manufacture of Kraft pulp is done by a/an __________ process. |
| A. | alkaline |
| B. | acidic |
| C. | neutral |
| D. | none of these |
| Answer» B. acidic | |
| 2889. |
Antibiotic |
| A. | inhibits/destroys the growth of microorganisms. |
| B. | is used as a pain reliever. |
| C. | is an antimalarial. |
| D. | is an anaesthetic. |
| Answer» B. is used as a pain reliever. | |
| 2890. |
Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent. |
| A. | 10 |
| B. | 50 |
| C. | 80 |
| D. | 95 |
| Answer» C. 80 | |
| 2891. |
Ore concentration by froth floatation utilises the __________ of ore particles. |
| A. | density difference |
| B. | wetting characteristics |
| C. | terminal velocities |
| D. | none of these |
| Answer» C. terminal velocities | |
| 2892. |
Chloramines are used in water treatment for |
| A. | disinfection and control of taste & odour. |
| B. | corrosion control. |
| C. | removing turbidity. |
| D. | control of bacteria. |
| Answer» B. corrosion control. | |
| 2893. |
Glycerine is recovered from lye by |
| A. | evaporation followed by vacuum distillation. |
| B. | liquid extraction technique. |
| C. | extractive distillation technique. |
| D. | none of these. |
| Answer» B. liquid extraction technique. | |
| 2894. |
Inversion of sucrose produces |
| A. | fructose |
| B. | glucose |
| C. | both (a) & (b) |
| D. | neither (a) nor (b) |
| Answer» C. both (a) & (b) | |
| 2895. |
Enzymes are organic catalysts used in the __________ reactions. |
| A. | chemical |
| B. | biochemical |
| C. | photochemical |
| D. | electrochemical |
| Answer» C. photochemical | |
| 2896. |
Linde process of gas liquefaction employs |
| A. | exchange of heat with colder stream. |
| B. | adiabatic expansion through a throttle valve (Joule-Thomson expansion). |
| C. | adiabatic expansion against a piston or in a turbine. |
| D. | merely compressing the gas beyond its critical pressure. |
| Answer» C. adiabatic expansion against a piston or in a turbine. | |
| 2897. |
A mineral is termed as 'ore', if |
| A. | a metal can be economically extracted from it. |
| B. | it contains 40% metal. |
| C. | the metal present in it is costly. |
| D. | all (a), (b) and (c). |
| Answer» B. it contains 40% metal. | |
| 2898. |
Which of the following is not an insecticide? |
| A. | Hydrocyanic acid |
| B. | Nicotine |
| C. | Sodium flouride |
| D. | Hexane |
| Answer» E. | |
| 2899. |
Shrinkage volume in cement setting does not depend upon the |
| A. | sand to cement ratio. |
| B. | water to cement ratio. |
| C. | ambient temperature fluctuation. |
| D. | drying period. |
| Answer» B. water to cement ratio. | |
| 2900. |
Bisphenol A is produced by the condensation of acetone with |
| A. | formaldehyde |
| B. | ethyl alcohol |
| C. | diethyl ether |
| D. | phenol |
| Answer» E. | |