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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.
| 2901. |
In Kraft process of paper manufacture, white cooking liquor consists of caustic soda |
| A. | sodium sulphide & sodium carbonate. |
| B. | sodium sulphite & sodium carbonate. |
| C. | sodium sulphite & sodium sulphide. |
| D. | none of these. |
| Answer» B. sodium sulphite & sodium carbonate. | |
| 2902. |
Presence of carbonaceous matter in the sewage |
| A. | causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures. |
| B. | reduces sulphate ions to sulphides causing obnoxious smell. |
| C. | increases the quantity of chlorine used for its purification. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 2903. |
Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like |
| A. | high cost |
| B. | fragile nature |
| C. | easy poisoning tendency |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 2904. |
__________ of rubber decreases after its vulcanisation. |
| A. | Resistance to the action of organic solvent |
| B. | Tackiness |
| C. | Maximum service temperature |
| D. | Tensile strength |
| Answer» C. Maximum service temperature | |
| 2905. |
Starting material for the commercial production of ethyl alcohol in India is |
| A. | rice |
| B. | molasses |
| C. | fruit of Mahua tree |
| D. | maize |
| Answer» C. fruit of Mahua tree | |
| 2906. |
Phenol formaldehyde |
| A. | employs addition polymerisation. |
| B. | employs condensation polymerisation. |
| C. | is a monomer. |
| D. | is an abrasive material. |
| Answer» C. is a monomer. | |
| 2907. |
The main use of activated carbon in water treatment is to control |
| A. | bacterial growth |
| B. | taste and odour |
| C. | turbidity |
| D. | none of these |
| Answer» C. turbidity | |
| 2908. |
The most commonly used substance to speed up the sedimentation of sewage is |
| A. | lime |
| B. | sulphuric acid |
| C. | chlorine |
| D. | sodium bisulphite |
| Answer» B. sulphuric acid | |
| 2909. |
Sucrose is a |
| A. | monosacchride |
| B. | disacchride |
| C. | polysacchride |
| D. | none of these |
| Answer» C. polysacchride | |
| 2910. |
__________ glass is used for the manufacture of optical glass. |
| A. | Pyrex |
| B. | Soda |
| C. | Flint |
| D. | Crooke's |
| Answer» D. Crooke's | |
| 2911. |
Thermosetting plastic materials |
| A. | can be repeatedly melted. |
| B. | is useful for melt casting. |
| C. | can not be melted after forming. |
| D. | is useful for spinning. |
| Answer» D. is useful for spinning. | |
| 2912. |
Favourable conditions for the liquefaction of gases in general are |
| A. | high pressure & low temperature. |
| B. | low pressure & high temperature. |
| C. | high pressure & high temperature. |
| D. | low pressure & low temperature. |
| Answer» B. low pressure & high temperature. | |
| 2913. |
In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed : |
| A. | furnace converter absorber |
| B. | furnace evaporator absorber |
| C. | furnace converter evaporator |
| D. | converter furnace absorber |
| Answer» B. furnace evaporator absorber | |
| 2914. |
Bakelite is |
| A. | same as poly tetrafluoroethylene (PTFE). |
| B. | an inorganic polymer. |
| C. | same as thermosetting phenol-formaldehyde. |
| D. | not a polymer. |
| Answer» D. not a polymer. | |
| 2915. |
Bromine content in sea water may be around __________ ppm. |
| A. | 70 |
| B. | 640 |
| C. | 1875 |
| D. | 2500 |
| Answer» B. 640 | |
| 2916. |
Argon is the third largest constituent of air (followed by N2 & O2). Its percentage by volume in air is |
| A. | 0.14 |
| B. | 0.34 |
| C. | 0.94 |
| D. | 1.4 |
| Answer» D. 1.4 | |
| 2917. |
Poly tetraflouro ethylene (P.T.F.E.) is known as |
| A. | bakelite |
| B. | teflon |
| C. | celluloid |
| D. | decron |
| Answer» C. celluloid | |
| 2918. |
__________ is produced by the dehydrogenation of ethyl benzene. |
| A. | Styrene |
| B. | Ethyl alcohol |
| C. | Cumene |
| D. | Phenol |
| Answer» B. Ethyl alcohol | |
| 2919. |
Which of the following is used as a coagulant in water treatment ? |
| A. | Chloramine |
| B. | Chlorine |
| C. | Ferrous sulphate |
| D. | Hydrogen peroxide |
| Answer» D. Hydrogen peroxide | |
| 2920. |
__________ paper is used in the manufacture of newsprint paper. |
| A. | Groundwood |
| B. | Board |
| C. | Tissue |
| D. | Wrapping |
| Answer» B. Board | |
| 2921. |
Hydrodenation of vegetable oils is a/an __________ reaction. |
| A. | endothermic |
| B. | autocatalytic |
| C. | exothermic |
| D. | homogenous |
| Answer» D. homogenous | |
| 2922. |
Permanent hardness of water is due to the presence of calcium & magnesium |
| A. | bi-carbonates |
| B. | sulphates & chlorides |
| C. | carbonate |
| D. | none of these |
| Answer» C. carbonate | |
| 2923. |
Soaps remove dirt by |
| A. | increasing the surface tension. |
| B. | decreasing wettability. |
| C. | supplying hydrophyllic group. |
| D. | none of these. |
| Answer» E. | |
| 2924. |
Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement ? |
| A. | Xanthates |
| B. | Stearic acid |
| C. | Calcium & aluminium stearate |
| D. | Formic acid |
| Answer» D. Formic acid | |
| 2925. |
Chemical name of soda ash is |
| A. | sodium bicarbonate |
| B. | sodium thiosulphate |
| C. | potassium carbonate |
| D. | none of these |
| Answer» E. | |
| 2926. |
A refrigerator may be termed as a |
| A. | heat pump |
| B. | heat engine |
| C. | Carnot engine |
| D. | none of these |
| Answer» B. heat engine | |
| 2927. |
For a stable phase at constant pressure and temperature, the fugacity of each component in a binary system __________ as its mole fraction increases. |
| A. | decreases |
| B. | increases |
| C. | remains same |
| D. | decreases linearly |
| Answer» C. remains same | |
| 2928. |
Solubility of a substance which dissolves with an increase in volume and liberation of heat will be favoured by the |
| A. | low pressure and high temperature. |
| B. | low pressure and low temperature. |
| C. | high pressure and low temperature. |
| D. | high pressure and high temperature. |
| Answer» C. high pressure and low temperature. | |
| 2929. |
Entropy is a measure of the __________ of a system. |
| A. | disorder |
| B. | orderly behaviour |
| C. | temperature changes only |
| D. | none of these |
| Answer» B. orderly behaviour | |
| 2930. |
Starting material for the production of styrene butadiene rubber (SBR) is |
| A. | ethyl alcohol |
| B. | ethylene |
| C. | both (a) & (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 2931. |
Which one of the following is not an elastomer ? |
| A. | Polyisoperene |
| B. | Neoprene |
| C. | Nitrile-butadiene |
| D. | None of these |
| Answer» E. | |
| 2932. |
Which of the following processes can remove both temporary as well as permanent hardness of water ? |
| A. | Filtration |
| B. | Boiling |
| C. | Distillation |
| D. | None of these |
| Answer» D. None of these | |
| 2933. |
Dacron is a |
| A. | condensation product of hexam-ethylene diamine and adipic acid. |
| B. | thermosetting material. |
| C. | condensation product of dimethyl terephthalate and ethylene glycol. |
| D. | none of these. |
| Answer» E. | |
| 2934. |
Rancidity of the fatty oil can be reduced by its |
| A. | decoloration |
| B. | hydrogenation |
| C. | oxidation |
| D. | purification |
| Answer» C. oxidation | |
| 2935. |
Tall oil obtained as a by-product from the black liquor recovery is |
| A. | a black, sticky & viscous liquid. |
| B. | used in the manufacture of greases, emulsions & soaps. |
| C. | composed mainly of rosin & fatty acids. |
| D. | all (a), (b) & (c). |
| Answer» E. | |
| 2936. |
__________ is a polysacchride. |
| A. | Maltose |
| B. | Starch |
| C. | Sucrose |
| D. | Glucose |
| Answer» C. Sucrose | |
| 2937. |
Acetone is produced by catalytic dehydrogenation of |
| A. | phenol |
| B. | naphthalene |
| C. | isopropanol |
| D. | ethyl benzene |
| Answer» D. ethyl benzene | |
| 2938. |
Laboratory glass wares which reacts with hydroflouric acid, are made of the __________ glass. |
| A. | lead |
| B. | borosilicate |
| C. | soda lime |
| D. | alkali silicate |
| Answer» C. soda lime | |
| 2939. |
Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of |
| A. | nitric acid |
| B. | hydrochloric acid |
| C. | methyl alcohol |
| D. | formic acid |
| Answer» B. hydrochloric acid | |
| 2940. |
The most stable allotropic form of phosphorous is the __________ phosphorous. |
| A. | white |
| B. | black |
| C. | yellow |
| D. | red |
| Answer» C. yellow | |
| 2941. |
Function of thinner in a paint is to |
| A. | accelerate the oxidation of oil. |
| B. | prevent gelling of the paint. |
| C. | suspend pigments & dissolve film forming materials. |
| D. | form a protective film. |
| Answer» D. form a protective film. | |
| 2942. |
Solvent used for extraction of oil is |
| A. | hexane |
| B. | methyl ethyl ketone |
| C. | furfurol |
| D. | none of these |
| Answer» B. methyl ethyl ketone | |
| 2943. |
Insulin is an __________ drug. |
| A. | anti-malarial |
| B. | anti-TB |
| C. | antibiotic |
| D. | none of these |
| Answer» E. | |
| 2944. |
Neoprene is chemically known as |
| A. | polybutadiene |
| B. | styrene butadiene rubber (SBR) |
| C. | polyurathane |
| D. | polychloroprene |
| Answer» E. | |
| 2945. |
Black liquor is converted into white liquor by |
| A. | evaporation and burning the concentrate followed by causticisation of products. |
| B. | multi-effect evaporation only. |
| C. | selective liquid extraction. |
| D. | extractive distillation. |
| Answer» B. multi-effect evaporation only. | |
| 2946. |
Alcohol is produced by the |
| A. | oxidation of an aldehyde |
| B. | hydrolysis of an ether |
| C. | esterification of a fat |
| D. | none of these |
| Answer» C. esterification of a fat | |
| 2947. |
Varnish does not contain |
| A. | pigment |
| B. | thinner |
| C. | dryer |
| D. | anti-skimming agent |
| Answer» B. thinner | |
| 2948. |
Polymerisation product of C2F4 (carbon tetraflouride) is called P.T.F.E (poly chloro tetra flouro ethylene). It is also called |
| A. | polyurethane |
| B. | silicone |
| C. | teflon |
| D. | epoxy resin |
| Answer» D. epoxy resin | |
| 2949. |
Thermosetting materials |
| A. | are cross-linked molecules. |
| B. | soften on application of heat. |
| C. | are solvent soluble. |
| D. | none of these. |
| Answer» B. soften on application of heat. | |
| 2950. |
Pick out the wrong statement. Iodine value of an oil or fat is |
| A. | the number of grams of iodine taken up by 100 gm of oil or fat. |
| B. | a measure of its unsaturation. |
| C. | helpful in findings its adulteration & its suitability for making soap. |
| D. | independent of the type of oil, whether it is drying or non-drying. |
| Answer» E. | |