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.
| 3451. |
Calcareous & argillaceous materials are used in the manufacture of |
| A. | lead |
| B. | cement |
| C. | carbon disulphide |
| D. | none of these |
| Answer» C. carbon disulphide | |
| 3452. |
Air used in aerobic fermentation must be sterilized, otherwise the |
| A. | recovery of product will be difficult. |
| B. | contamination of pure culture would result. |
| C. | uniformity of product cannot be achieved. |
| D. | none of these. |
| Answer» C. uniformity of product cannot be achieved. | |
| 3453. |
Alkylbenzene sulfonate (ABS) is a |
| A. | detergent |
| B. | rubber |
| C. | pesticide |
| D. | polyester |
| Answer» B. rubber | |
| 3454. |
High temperature carbonisation of coal produces |
| A. | inferior coke compared to low temperature carbonisation. |
| B. | less of gases compared to liquid products. |
| C. | larger quantity of tar compared to low temperature carbonisation. |
| D. | none of these. |
| Answer» E. | |
| 3455. |
Alcohol content in freshly prepared natural and fortified wine may be respectively around __________ percent. |
| A. | 7-14 and 14-30 |
| B. | 7-14 and 40-50 |
| C. | 14 - 30 and 40-50 |
| D. | 10 - 20 and 40 - 50 |
| Answer» B. 7-14 and 40-50 | |
| 3456. |
Setting of plaster of paris is accompanied with |
| A. | hydration |
| B. | dehydration |
| C. | hydrolysis |
| D. | loss of CO |
| E. | <sub>2</sub> |
| Answer» B. dehydration | |
| 3457. |
Which of the following is not present in bagasse fibre ? |
| A. | Cellulose |
| B. | Lignin |
| C. | Pentogens |
| D. | None of these |
| Answer» E. | |
| 3458. |
Nitric acid is not used in the manufacture of |
| A. | detergents |
| B. | fertilisers |
| C. | aqua regia |
| D. | explosives. |
| Answer» B. fertilisers | |
| 3459. |
Naphthols are derivates of |
| A. | methyl amine |
| B. | naphthalene |
| C. | phenol |
| D. | xylene |
| Answer» C. phenol | |
| 3460. |
Fermentation is adversely affected by the |
| A. | presence of air. |
| B. | absence of air. |
| C. | high concentration. |
| D. | presence of ammonium salts. |
| Answer» D. presence of ammonium salts. | |
| 3461. |
Nylon-6 is a |
| A. | polyamide |
| B. | thermosetting resin |
| C. | polyester |
| D. | none of these |
| Answer» B. thermosetting resin | |
| 3462. |
The main product of high temperature carbonisation of coal is |
| A. | coke |
| B. | ammonia |
| C. | tar |
| D. | phenol |
| Answer» B. ammonia | |
| 3463. |
In the manufacture of viscose rayon, the raw material used industrially is |
| A. | recalyptious wood |
| B. | bamboo |
| C. | bagasse |
| D. | fine teak wood |
| Answer» E. | |
| 3464. |
Bordeaux mixture is a/an |
| A. | fertiliser |
| B. | inorganic fungicide |
| C. | insecticide |
| D. | explosive |
| Answer» C. insecticide | |
| 3465. |
Silicone is a/an |
| A. | thermoplastic |
| B. | inorganic polymer |
| C. | monomer |
| D. | none of these |
| Answer» C. monomer | |
| 3466. |
Nickel is not used as a catalyst in the __________ reaction. |
| A. | shift conversion |
| B. | oil hydrogenation |
| C. | steaming reforming of naphtha |
| D. | ammonia cracking/dissociation |
| Answer» B. oil hydrogenation | |
| 3467. |
Lithopaneis |
| A. | explosive |
| B. | white lead |
| C. | filter aid |
| D. | ZnS (white pigment) |
| Answer» E. | |
| 3468. |
The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by |
| A. | electrolysis |
| B. | electrolytic reduction |
| C. | electrolytic oxidation |
| D. | none of these |
| Answer» C. electrolytic oxidation | |
| 3469. |
Bakelite is chemically known as |
| A. | polyvinyl chloride (PVC) |
| B. | polybutadiene |
| C. | phenol formaldehyde |
| D. | polyurathane |
| Answer» D. polyurathane | |
| 3470. |
__________ are added in lacquers to remove film brittleness and to improve adhereness. |
| A. | Film forming materials |
| B. | Plasticisers |
| C. | Diluents |
| D. | Solvents |
| Answer» C. Diluents | |
| 3471. |
Washing of coal is done to |
| A. | remove the inherent impurities. |
| B. | remove the adhering impurities. |
| C. | reduce the ash content. |
| D. | both(b) and (c). |
| Answer» E. | |
| 3472. |
Systemic insecticides |
| A. | are absorbed throughout the plant. |
| B. | kill insects following external bodily contact. |
| C. | are stomach poisons. |
| D. | emit poisonous vapour. |
| Answer» B. kill insects following external bodily contact. | |
| 3473. |
Dry ice (solidified CO2) is used for the |
| A. | storage & shipment of frozen foods and ice-creams. |
| B. | liquefaction of permanent gases. |
| C. | liquefaction of natural gas. |
| D. | none of these. |
| Answer» B. liquefaction of permanent gases. | |
| 3474. |
In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the |
| A. | diamine and the ring. |
| B. | dibasic acid and the ring. |
| C. | diamine and the dibasic acid. |
| D. | none of these. |
| Answer» D. none of these. | |
| 3475. |
Higher vicosity index of a lubricating oil denotes |
| A. | less changes in fluidity of oil with temperature. |
| B. | substantially high change in fluidity of oil with temperature. |
| C. | its unsuitability under varying temperature conditions . |
| D. | none of these. |
| Answer» B. substantially high change in fluidity of oil with temperature. | |
| 3476. |
Le-Blanc process is a primitive process for the manufacture of |
| A. | caustic soda |
| B. | soda ash |
| C. | bromine from sea water |
| D. | hydrochloric acid |
| Answer» C. bromine from sea water | |
| 3477. |
How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln? |
| A. | 500 C |
| B. | 750 C |
| C. | 1000 C |
| D. | 1500 C |
| Answer» D. 1500 C | |
| 3478. |
Cement setting under water employs a/an __________ process. |
| A. | hydration |
| B. | decomposition |
| C. | oxidation |
| D. | reduction |
| Answer» B. decomposition | |
| 3479. |
Carborundum consists mainly of |
| A. | bauxite |
| B. | silicon carbide |
| C. | boron carbide |
| D. | calcium carbide |
| Answer» C. boron carbide | |
| 3480. |
Wax is a |
| A. | mixture of glycerides. |
| B. | mixture of esters of polyhydric alcohols excepting glycerine. |
| C. | liquid at room temperature. |
| D. | mixture of glycerides of fatty acids. |
| Answer» C. liquid at room temperature. | |
| 3481. |
Catalyst used in the hydrogenation of oil is |
| A. | nickel |
| B. | platinum |
| C. | iron |
| D. | alumina |
| Answer» B. platinum | |
| 3482. |
Viscose rayon is |
| A. | cellulose nitrate. |
| B. | regenerated cellulose nitrate. |
| C. | regenerated cellulose acetate. |
| D. | none of these. |
| Answer» E. | |
| 3483. |
Triple superphosphate is manufactured by reacting |
| A. | phosphate rock with phosphoric acid. |
| B. | phosphate rock with sulphuric acid. |
| C. | phosphate rock with nitric acid. |
| D. | ammonium phosphate with phosphoric acid. |
| Answer» B. phosphate rock with sulphuric acid. | |
| 3484. |
Which of the following is the main constituent of the mother liquor produced in salt industry ? |
| A. | Quick lime |
| B. | Glauber's salt |
| C. | Salt petre |
| D. | Bromine |
| Answer» E. | |
| 3485. |
Silicon carbide is a/an |
| A. | adhesive |
| B. | abrasive |
| C. | type of glass |
| D. | brittle material |
| Answer» C. type of glass | |
| 3486. |
Oxygen is produced by fractionation of air using __________ process. |
| A. | Linde's |
| B. | Claude's |
| C. | either (a) or (b) |
| D. | none of these |
| Answer» D. none of these | |
| 3487. |
Trinitrotoluene (TNT), an explosive, is made by the nitration of |
| A. | nitrobenzene |
| B. | toluene |
| C. | nitrotoluene |
| D. | benzene |
| Answer» C. nitrotoluene | |
| 3488. |
Which of the following is used as a coagulant in treating turbid water ? |
| A. | Chlorine |
| B. | Ferric sulphate |
| C. | Calcium sulphate |
| D. | Activated carbon |
| Answer» C. Calcium sulphate | |
| 3489. |
Electric bulbs are made of __________ glass. |
| A. | jena |
| B. | flint |
| C. | crookes |
| D. | pyrex |
| Answer» C. crookes | |
| 3490. |
Which of the following is used as a binding material in soap to improve soap texture ? |
| A. | Rosin |
| B. | Borax |
| C. | Benzyl acetate |
| D. | Sodium carbonate |
| Answer» C. Benzyl acetate | |
| 3491. |
An alkali metal salt of palmitic acid is known as |
| A. | soap |
| B. | metallic soap |
| C. | detergent |
| D. | alkaloid |
| Answer» C. detergent | |
| 3492. |
Magnesium and calcium __________ cause temporary hardness of water. |
| A. | carbonates |
| B. | bicarbonates |
| C. | phosphates |
| D. | sulphates |
| Answer» C. phosphates | |
| 3493. |
Blue vitriol is chemically |
| A. | copper sulphate |
| B. | ferrous sulphate |
| C. | copper nitrate |
| D. | aluminium sulphate |
| Answer» B. ferrous sulphate | |
| 3494. |
Trinitro-toluene (TNT) is |
| A. | used in glycerine manufacture. |
| B. | an explosive. |
| C. | used in dye manufacture. |
| D. | none of these. |
| Answer» C. used in dye manufacture. | |
| 3495. |
Acrylonitrile is mainly used in the __________ industry. |
| A. | polymer |
| B. | printing |
| C. | dyeing |
| D. | photographic |
| Answer» D. photographic | |
| 3496. |
The enzyme which converts starch into the disacharides maltose is |
| A. | diastase |
| B. | maltase |
| C. | yeast |
| D. | none of these |
| Answer» B. maltase | |
| 3497. |
Presence of H2S in raw water (to be chlorinated) results in the |
| A. | reduced softening capacity of zeolite. |
| B. | increased dosage of chlorine to provide a disinfecting residual in the water. |
| C. | easy removal of its hardness. |
| D. | none of these. |
| Answer» C. easy removal of its hardness. | |
| 3498. |
Contact process of sulphuric acid manufacture |
| A. | yields acid of higher concentration than chamber process. |
| B. | yields acids of lower concentration than chamber process. |
| C. | is obsolete. |
| D. | eliminates absorber. |
| Answer» B. yields acids of lower concentration than chamber process. | |
| 3499. |
Salt is the basic raw material for the manufacture of |
| A. | cement |
| B. | glass |
| C. | potteries |
| D. | caustic soda |
| Answer» E. | |
| 3500. |
Hydrazine (N2H4) is used mainly as a/an |
| A. | explosive |
| B. | rocket fuel |
| C. | detergents additive |
| D. | none of these |
| Answer» C. detergents additive | |