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.
| 601. |
Tyres are made by |
| A. | injection moulding |
| B. | extrusion |
| C. | rotational moulding |
| D. | compression moulding |
| Answer» D. compression moulding | |
| 602. |
Addition of plasticisers to polymers results in partial neutralisation of intermolecular forces of attraction between the macro-molecules thereby increasing its |
| A. | tensile strength |
| B. | chemical resistance |
| C. | flexibility |
| D. | all (a), (b) & (c) |
| Answer» D. all (a), (b) & (c) | |
| 603. |
Polymerisation process in which two or more monomers of chemically different nature take part is called |
| A. | copolymerisation |
| B. | addition polymerisation |
| C. | chain polymerisation |
| D. | none of these |
| Answer» B. addition polymerisation | |
| 604. |
Polycondensation of saturated dicarboxylic acid with polyhydric alcohol produces |
| A. | epoxy resin |
| B. | polyamide |
| C. | alkyd resin |
| D. | phenolic resin |
| Answer» D. phenolic resin | |
| 605. |
Molecular weight of a polymer is equal to the molecular weight of the repeat unit multiplied by the degree of polymerisation. What is the molecular weight of poly vinyl chloride (PVC), if its degree of polymerisation is 800 ? |
| A. | 50000 |
| B. | 51600 |
| C. | 49200 |
| D. | 50800 |
| Answer» B. 51600 | |
| 606. |
Condensation of bisphenol A with phosgene produces __________ which possess very good heat resistance. |
| A. | polyurathane |
| B. | polysulphone |
| C. | polycarbonate |
| D. | polyester |
| Answer» D. polyester | |
| 607. |
Which of the following types of polymers has the strongest inter particle forces ? |
| A. | Elastomers |
| B. | Fibres |
| C. | Thermoplastics |
| D. | Thermosetting polymers |
| Answer» E. | |
| 608. |
A copolymer of vinyl and vinylidine chloride is called |
| A. | treylene |
| B. | orlon |
| C. | saran |
| D. | dacron |
| Answer» D. dacron | |
| 609. |
The monomer for the production of neoprene rubber is |
| A. | acetylene |
| B. | chloroprene |
| C. | isoprene |
| D. | none of these |
| Answer» C. isoprene | |
| 610. |
A copolymer is formed by the combination of two or more monomer molecules |
| A. | in a chain without the elimination of water. |
| B. | with the elimination of small amount of water. |
| C. | of the same monomer by elimination of small molecules of water. |
| D. | none of these. |
| Answer» B. with the elimination of small amount of water. | |
| 611. |
Thermoplastic resins usually |
| A. | remain hard as long as they are hot. |
| B. | can not be reclaimed from waste. |
| C. | permanent setting resins. |
| D. | less brittle than thermosetting resins. |
| Answer» E. | |
| 612. |
__________ are produced by reacting polybasic acid (e.g. phthalic anhydride) with polyhydric alcohol (e.g., glycerol). |
| A. | Unsaturated polyester |
| B. | Alkyd resins |
| C. | Saturated polyester |
| D. | Amino resins |
| Answer» C. Saturated polyester | |
| 613. |
Which of the following is an elastomer ? |
| A. | Thiokol |
| B. | Phenol formaldehyde |
| C. | Urea formaldehyde |
| D. | Polystyrene |
| Answer» B. Phenol formaldehyde | |
| 614. |
The inter particle forces between linear chains in nylon-66 are __________ bonds. |
| A. | hydrogen |
| B. | covalant |
| C. | ionic |
| D. | none of these |
| Answer» B. covalant | |
| 615. |
Linear polymers are normally |
| A. | thermosetting. |
| B. | thermosplastic. |
| C. | elastometric. |
| D. | having extremely high softening point. |
| Answer» C. elastometric. | |
| 616. |
Which of the following is an inorganic polymer ? |
| A. | Teflon |
| B. | Perspex |
| C. | Silicones |
| D. | Bakelite |
| Answer» D. Bakelite | |
| 617. |
__________ moulding is used for shaping of thermosetting plastics exclusively. |
| A. | Compression |
| B. | Injection |
| C. | Transfer |
| D. | Extrusion |
| Answer» D. Extrusion | |
| 618. |
Bristles of tooth brushes are made of |
| A. | nylon-6 |
| B. | nylon-66 |
| C. | polystyrene |
| D. | PVC |
| Answer» C. polystyrene | |
| 619. |
Alkyd resin can not be used for making |
| A. | plasticiser |
| B. | paint & varnish |
| C. | fibres |
| D. | film forming materials |
| Answer» D. film forming materials | |
| 620. |
Valcunisation of rubber decreases its |
| A. | tensile strength. |
| B. | resistance to organic solvents. |
| C. | tackiness. |
| D. | working temperature range. |
| Answer» D. working temperature range. | |
| 621. |
Plastic articles are normally produced by __________ moulding. |
| A. | green sand |
| B. | injection |
| C. | shell |
| D. | dry sand |
| Answer» C. shell | |
| 622. |
Main constituent of cotton fibre is |
| A. | lignin |
| B. | cellulose |
| C. | starch |
| D. | gelatine |
| Answer» C. starch | |
| 623. |
Thermocole (expanded polystyrene) is not used for |
| A. | low temperature thermal insulation as in refrigerator and air conditioners. |
| B. | accoustic control and ceiling for building. |
| C. | high temperature thermal insulation in furnaces. |
| D. | packing of delicate electronic gadgets. |
| Answer» D. packing of delicate electronic gadgets. | |
| 624. |
Which of the following is not a thermoplastic material ? |
| A. | Epoxy polymer |
| B. | PVC |
| C. | Polystyrene |
| D. | Polythene |
| Answer» B. PVC | |
| 625. |
Polyurathane can not be used for making |
| A. | mattresses & foam |
| B. | coating material |
| C. | adhesives |
| D. | bottles |
| Answer» E. | |
| 626. |
Polystyrene is a __________ plastic at room temperature. |
| A. | ductile |
| B. | brittle |
| C. | malleable |
| D. | none of these |
| Answer» C. malleable | |
| 627. |
Polycaprolactum (Nylon - 6) is produced by the condensation polymerisation of caprolactum at 240-280 C in which the conversion of caprolactum is about __________ percent. |
| A. | 50 |
| B. | 75 |
| C. | 90 |
| D. | 99 |
| Answer» D. 99 | |
| 628. |
Liners of bags are usually made of |
| A. | polythene |
| B. | PVC |
| C. | polypropylene |
| D. | polyesters |
| Answer» D. polyesters | |
| 629. |
Orlon is |
| A. | a copolymer. |
| B. | a condensation polymer. |
| C. | obtained by polymerising vinyl cyanide. |
| D. | all (a), (b) and (c). |
| Answer» D. all (a), (b) and (c). | |
| 630. |
Amino resins are used in paper treatment to improve its |
| A. | wet tear and bursting strength. |
| B. | folding endurance |
| C. | wet rub resistance |
| D. | all (a), (b) & (c) |
| Answer» E. | |
| 631. |
Acrylonitrile-butadiene-styrene (ABS) copolymer, which is produced by blending styrene-acrylonitfile copolymer with butadiene based elastomer, is a/an |
| A. | rigid foam |
| B. | engineering plastic |
| C. | thermosetting polymer |
| D. | spongy rubber |
| Answer» C. thermosetting polymer | |
| 632. |
Polystyrene is a light, transparent, thermoplastic material used for making |
| A. | toys and combs |
| B. | packaging bags |
| C. | non-sticking utensils |
| D. | electrical insulation |
| Answer» B. packaging bags | |
| 633. |
Cation exchange resins (0.3 to 1 mm size) used in water treatment is prepared from __________ resins. |
| A. | epoxy |
| B. | phenol formaldehyde |
| C. | urea formaldehyde |
| D. | melamine formaldehyde |
| Answer» D. melamine formaldehyde | |
| 634. |
The physical state in which polymers exist is |
| A. | melts & rubber like state. |
| B. | amorphous glassy state. |
| C. | partially crystalline state. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 635. |
Polythene is a/an |
| A. | addition polymerisation product. |
| B. | condensation polymerisation product. |
| C. | thermosetting material. |
| D. | none of these. |
| Answer» B. condensation polymerisation product. | |
| 636. |
Synthetic polymer produced by using terephthalic acid and ethylene glycol is |
| A. | terylene |
| B. | nylon-66 |
| C. | PVC |
| D. | polyesterene |
| Answer» B. nylon-66 | |
| 637. |
Catalyst used in the production of high density polythene by low pressure Ziegler process is |
| A. | aluminium triethyl activated with TiCl |
| B. | <sub>4</sub> |
| C. | platinum |
| D. | molybdenum |
| E. | Nickel |
| Answer» B. <sub>4</sub> | |
| 638. |
Alkyd resin e.g., glyptal resin formed by phthalic anhydride and glycerene is not used |
| A. | for surface coating of automobiles & air crafts. |
| B. | for fibre making. |
| C. | as plasticiser for PVC & nitrocellulose. |
| D. | for film forming materials. |
| Answer» C. as plasticiser for PVC & nitrocellulose. | |
| 639. |
Contact lenses for eyes are made of perspex, which is nothing but |
| A. | polymethylmethacrylate |
| B. | polystyrene |
| C. | unsaturated polyester |
| D. | polypropylene |
| Answer» B. polystyrene | |
| 640. |
Thorium-232 (a fertile material) on absorption of a neutron gets converted into __________ , which is a fissile material. |
| A. | thorium-233 |
| B. | uranium-235 |
| C. | uranium-233 |
| D. | plutonium-239 |
| Answer» D. plutonium-239 | |
| 641. |
First experimental observation of nuclear fission was done by |
| A. | Plane |
| B. | Rutherford |
| C. | Fermi |
| D. | Hahn and Strassman |
| Answer» D. Hahn and Strassman | |
| 642. |
H2 is a better coolant than CO2, due to its relatively |
| A. | lower density. |
| B. | higher specific heat. |
| C. | non-reactivity to uranium. |
| D. | lower neutron capture cross-section. |
| Answer» C. non-reactivity to uranium. | |
| 643. |
Percentage of natural uranium present in uranium ore found in Jadugoda (Jharkhand) is |
| A. | 0.1 |
| B. | 1 |
| C. | 3 |
| D. | 12 |
| Answer» B. 1 | |
| 644. |
Candu reactor is a __________ nuclcear reactor. |
| A. | natural uranium fuelled heavy water cooled & moderated |
| B. | highly enriched uranium (85% U-235) fuelled |
| C. | homogeneous |
| D. | fast breeder |
| Answer» B. highly enriched uranium (85% U-235) fuelled | |
| 645. |
Radioactive decay is a __________ change. |
| A. | chemical |
| B. | nuclear |
| C. | physical |
| D. | none of these |
| Answer» C. physical | |
| 646. |
Thorium can be converted into U-233 in a __________ reactor. |
| A. | liquid metal cooled |
| B. | fast breeder |
| C. | thermal |
| D. | swimming pool |
| Answer» C. thermal | |
| 647. |
Buna-S is also called |
| A. | polyurathane |
| B. | SBR |
| C. | teflon |
| D. | bakelite |
| Answer» C. teflon | |
| 648. |
The velocity of thermal (slow) neutrons triggering nuclear fission reaction (having energy equal to 0.025 eV) is about __________ metres/second. |
| A. | 1100 |
| B. | 2200 |
| C. | 3300 |
| D. | 4400 |
| Answer» C. 3300 | |
| 649. |
A fast breeder reactor employs |
| A. | graphite as moderator. |
| B. | water as coolant. |
| C. | molten sodium as coolant as well as moderator. |
| D. | U-235 as fuel. |
| Answer» E. | |
| 650. |
__________ of depreciation calculation accounts for the interest on investement. |
| A. | Straight line method |
| B. | Declining balance |
| C. | both (a) and (b) |
| D. | neither (a) nor (b). |
| Answer» E. | |