MCQOPTIONS
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MCQOPTIONS
This section includes 607 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 551. |
Vinyl flooring is done using __________ sheets. |
| A. | polypropylene |
| B. | PVC |
| C. | polythene |
| D. | polyvinyl acetate |
| Answer» C. polythene | |
| 552. |
Liners of bags are usually made of |
| A. | polythene |
| B. | PVC |
| C. | polypropylene |
| D. | polyesters |
| Answer» D. polyesters | |
| 553. |
Density of low density polythene is about __________ gm/c.c. |
| A. | 0.38 |
| B. | 0.56 |
| C. | 0.81 |
| D. | 0.91 |
| Answer» E. | |
| 554. |
All thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it can not be used for the production of plastic |
| A. | filaments |
| B. | pipes |
| C. | buckets |
| D. | tubings |
| Answer» D. tubings | |
| 555. |
Which of the following polymers belong to the class of formaldehyde resin ? |
| A. | Melamine resins |
| B. | Teflon |
| C. | Dacron |
| D. | None of these |
| Answer» B. Teflon | |
| 556. |
Thermosplastic materials |
| A. | do not soften on application of heat. |
| B. | are heavily branched molecules. |
| C. | are solvent insoluble. |
| D. | none of these. |
| Answer» E. | |
| 557. |
Mastication of rubber means |
| A. | its softening. |
| B. | a treatment to retard its deterioration due to oxidation. |
| C. | improving its curing rate. |
| D. | depression of its freezing point. |
| Answer» B. a treatment to retard its deterioration due to oxidation. | |
| 558. |
Molecular weights of plastics ranges from |
| A. | 1000 to 5000 |
| B. | 5000 to 1000 |
| C. | 20000 to 25000 |
| D. | 109 to l011 |
| Answer» D. 109 to l011 | |
| 559. |
The major component of acrylic fibres is |
| A. | polyamides |
| B. | polyolefins |
| C. | polyacrylonitrile |
| D. | polyesters |
| Answer» D. polyesters | |
| 560. |
Branched chair polymers as compared to linear polymers have |
| A. | higher melting point. |
| B. | higher tensile strength. |
| C. | lower density. |
| D. | none of these. |
| Answer» D. none of these. | |
| 561. |
Synthetic rubber |
| A. | deforms, if stretched to double of its original dimension. |
| B. | is brittle at low temperature |
| C. | is softer at higher temperature. |
| D. | is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases. |
| Answer» E. | |
| 562. |
Rayon is a __________ fibre. |
| A. | cellulosic |
| B. | polyamide |
| C. | polyester |
| D. | natural |
| Answer» B. polyamide | |
| 563. |
Vulcanisation of rubber |
| A. | decreases its tensile strength. |
| B. | increases its ozone & oxygen reactivity. |
| C. | increases its oil & solvent resistance. |
| D. | converts its plasticity into elasticity. |
| Answer» E. | |
| 564. |
Out of all the elastomers, natural rubber has the longest elongation range & flexibility of the order of __________ percent. |
| A. | 1-1000 |
| B. | 1000-1500 |
| C. | 1500-2000 |
| D. | 2000-2500 |
| Answer» B. 1000-1500 | |
| 565. |
Rayon is superior to cotton in making gauge for wound treatment, because rayon |
| A. | is a synthetic polymer. |
| B. | does not stick to the wound unlike cotton. |
| C. | can absorb over 90% of its own weight of water. |
| D. | both (b) and (c). |
| Answer» C. can absorb over 90% of its own weight of water. | |
| 566. |
__________ is an addition polymer |
| A. | Nylon |
| B. | Bakelite |
| C. | Polythene |
| D. | none of these |
| Answer» D. none of these | |
| 567. |
Tubeless tyres are made of __________ rubber, which is a co-polymer of isoprene & isobutylene. |
| A. | nitrile |
| B. | silicone |
| C. | neoprene |
| D. | butyl |
| Answer» E. | |
| 568. |
Branched chain polymers compared to linear polymers have higher |
| A. | density. |
| B. | tensile strength. |
| C. | melting point. |
| D. | degree of irregularity in atomic packing. |
| Answer» E. | |
| 569. |
90% of the caprolactum is converted to nylon-6 on its condensation polymerisation in the reactor maintained at a temperature of __________ °C. |
| A. | -5 |
| B. | 11232 |
| C. | 250-280 |
| D. | 500-600 |
| Answer» D. 500-600 | |
| 570. |
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. | |
| 571. |
Neoprene which is used for making shoe heels & belts is superior to natural rubber in its stability to aerial oxidation and resistance to oils & other solvents. The monomer used for making neoprene is |
| A. | chloroethane |
| B. | chlorophrene |
| C. | isoprene |
| D. | none of these |
| Answer» C. isoprene | |
| 572. |
Antioxidants are added to rubber to protect it from the attack of light, heat & atmospheric ozone. Which of the following is an antioxident used in rubber ? |
| A. | Carbon |
| B. | Alkylated diphenyl amine |
| C. | Thiokol |
| D. | Magnesium |
| Answer» C. Thiokol | |
| 573. |
Which of the following is an inorganic polymer ? |
| A. | Teflon |
| B. | Perspex |
| C. | Silicones |
| D. | Bakelite |
| Answer» D. Bakelite | |
| 574. |
Automobile steering wheels are normally made of |
| A. | cellulose acetate |
| B. | cellulose nitrate |
| C. | PVC |
| D. | high density polythene |
| Answer» B. cellulose nitrate | |
| 575. |
Which of the following is a polymer of hexamethylene diamine and adipic acid ? |
| A. | Nylon-6 |
| B. | Nylon-66 |
| C. | Nylon-6, 10 |
| D. | Epoxy resin |
| Answer» C. Nylon-6, 10 | |
| 576. |
Gutta parcha rubber is |
| A. | soft & tacky at room temperature. |
| B. | an isomer of natural rubber. |
| C. | a thermosetting resin. |
| D. | recovered by coagulation of rubber latex. |
| Answer» C. a thermosetting resin. | |
| 577. |
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. | |
| 578. |
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 | |
| 579. |
Silicone resins, which are highly water repellant and has good heat resistance can not be used |
| A. | as room temperature adhesive. |
| B. | as grease & lubricant. |
| C. | hydraulic fluid for heat transfer. |
| D. | resin for lamination. |
| Answer» B. as grease & lubricant. | |
| 580. |
Which of the following is the most important rubber compounding ingradient which is used to improve wearing qualities of both natural rubber & SBR by imparting toughness ? |
| A. | Phosphorous |
| B. | Carbon black |
| C. | Pine oil |
| D. | Rosin |
| Answer» C. Pine oil | |
| 581. |
Reaction of dimethyl terephthalate (DMT) and ethylene glycol produces |
| A. | nylon-6 |
| B. | dacron |
| C. | polyester |
| D. | PVC |
| Answer» C. polyester | |
| 582. |
__________ polymer is used for making unbreakable crockery. |
| A. | Thermoplastic |
| B. | Melamine |
| C. | Addition |
| D. | none of these |
| Answer» C. Addition | |
| 583. |
The rate controlling step in the manufacture of silicone rubber is the |
| A. | polymer termination step. |
| B. | condensation of siloxane to silicone. |
| C. | initial hydrolysis of silicone monomer. |
| D. | none of these. |
| Answer» D. none of these. | |
| 584. |
Visco-elastic behaviour exhibited by plastics is a __________ like behaviour. |
| A. | solid |
| B. | liquid |
| C. | combination of solid & liquid |
| D. | neither solid nor liquid |
| Answer» D. neither solid nor liquid | |
| 585. |
Fillers such as zinc oxide and carbon black are added to the crude natural rubber before vulcanisation in order to improve its |
| A. | elasticity |
| B. | strength |
| C. | plasticity |
| D. | weathering characteristics |
| Answer» E. | |
| 586. |
__________ of SBR is adversely affected, if more quantity of styrene is added to butadiene during its co-polymerisation to produce SBR. |
| A. | Percent elongation |
| B. | Resilience |
| C. | Freezing point |
| D. | Strength |
| Answer» C. Freezing point | |
| 587. |
Which of the following is not present in bagasse fibre ? |
| A. | Cellulose |
| B. | Lignin |
| C. | Pentogens |
| D. | None of these |
| Answer» E. | |
| 588. |
Which of the following is generally not drawn into fibre ? |
| A. | Polyamide |
| B. | Unsaturated polyesters |
| C. | Saturated polyesters |
| D. | Polyacrylonitrile |
| Answer» C. Saturated polyesters | |
| 589. |
The monomer of poly vinyl chloride (PVC) is |
| A. | chloroethene |
| B. | ethylene dichloride |
| C. | ethyl chloride |
| D. | chloroform |
| Answer» B. ethylene dichloride | |
| 590. |
Identify the group in which all the polymers mentioned can be used to make fibres. |
| A. | Butadiene copolymers, Polyamides, Urea aldehyde |
| B. | Cellulose derivatives, Polyisoprene, Polyethylene |
| C. | Cellulose derivatives, Polyamides, Polyurathane |
| D. | Polypropylene, Poly vinyl chloride, Silicon |
| Answer» C. Cellulose derivatives, Polyamides, Polyurathane | |
| 591. |
Lavatory cisterns are normally made of |
| A. | expanded polystyrene |
| B. | saturated polyester |
| C. | perspex |
| D. | PVC |
| Answer» B. saturated polyester | |
| 592. |
Density of high density polythene is about __________ gm/c.c. |
| A. | 1.18 |
| B. | 1.05 |
| C. | 0.95 |
| D. | 0.99 |
| Answer» D. 0.99 | |
| 593. |
The main use of butadiene is |
| A. | as a plasticiser for unsaturated polyester. |
| B. | in the manufacture of synthetic rubber. |
| C. | as an anti-skimming agent in paint. |
| D. | none of these. |
| Answer» C. as an anti-skimming agent in paint. | |
| 594. |
The synthetic fibres produced from __________ are known as rayon. |
| A. | lignin |
| B. | cellulose |
| C. | polyamides |
| D. | ethylene glycol |
| Answer» C. polyamides | |
| 595. |
Buna-S is also known as |
| A. | teflon |
| B. | PTFE |
| C. | SBR |
| D. | polycrylates |
| Answer» D. polycrylates | |
| 596. |
Which of the following is not the commercial name of polymethylmethacrylate (PMMA) ? |
| A. | Perspex |
| B. | Lucite |
| C. | Plexiglass |
| D. | Teflon |
| Answer» E. | |
| 597. |
Caprolactum, a raw material for the manufacture of nylon-6, is produced from |
| A. | phenol |
| B. | naphthalene |
| C. | benzene |
| D. | pyridine |
| Answer» D. pyridine | |
| 598. |
Which of the following low molecular weight (<104 ), soft & waxy polymer is used in chewing gum ? |
| A. | Cellulose acetate |
| B. | Polyvinyl acetate |
| C. | Thiokol |
| D. | PVC |
| Answer» C. Thiokol | |
| 599. |
Which of the following is the lowest cost plastic commercially available ? |
| A. | Polythene |
| B. | Teflon |
| C. | Bakelite |
| D. | PVC |
| Answer» B. Teflon | |
| 600. |
Starting material for the production of SBR is |
| A. | ethyl alcohol |
| B. | ethylene |
| C. | both (a) & (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |