Paits and Varnishes Multiple Choice Questions (MCQs) PDF

# Multiple Choice Questions (MCQs) ## Paints and Varnishes 1. The main purpose of painting an iron grill is ...... - (a) to protect it from corrosion - (c) to decrease the weather resistance - (b) to reduce its life and durability - (d) to improve its beauty and appearance 2. A good...

# Multiple Choice Questions (MCQs) ## Paints and Varnishes 1. The main purpose of painting an iron grill is ...... - (a) to protect it from corrosion - (c) to decrease the weather resistance - (b) to reduce its life and durability - (d) to improve its beauty and appearance 2. A good paint must have....... - (a) high covering power - (c) reflecting property - (b) brushing characteristic light - (d) all of the above ## Basic Science: Chemistry (Sem. I) 3. A paint does not constitute of ...... - (a) binder - (b) pigment - (c) gypsum - (d) drying oil 4. A mixture of drying oil, resins and volatile solvent is known as ...... - (a) polymer - (b) plastic - (c) paint - (d) varnish 5. The composition of paint that provides the hiding power is ...... - (a) pigment - (b) solvent - (c) vehicle - (d) none of these 6. The paint additives that provide flexibility in coating and also prevent separation of components are - (a) fillers - (b) plasticizers - (c) thinners - (d) pigments 7. Varnish is used to give ...... - (a) transparent finish - (b) red colour finish - (c) opaque finish - (d) fire resistant finish 8. Non-volatile, film-forming constituent of a paint is called ...... - (a) drier - (b) pigment - (c) thinner - (d) drying oil 9. White lead in paint acts as ...... - (a) thinner - (b) drying oil - (c) pigments - (d) drier 10. Thinners are added to paint to ..... - (a) improve drying quality - (c) reduce the consistency - (b) reduce the cost - (d) provide water proofness 11. A paint contains ...... - (a) pigment only - (c) pigment + drier only - (b) drying oil only - (d) all of these 12. Opacity and desired colour to paint are provided by ...... - (a) extenders - (b) driers - (c) pigments - (d) thinners 13. Drying oils supply to paint film ... - (a) main film-forming constituent - (c) water proofness - (b) medium or vehicle - (d) all of these 14. Spirit varnish is a solution of ...... - (a) oil + pigment - (b) resin + pigment - (c) resin + solvent - (d) pigment + drier 15. A solution of shellac in alcohol is an example of ...... - (a) oil varnish - (b) paint - (c) spirit varnish - (d) none of these 16. Both paint and oil varnish contain common constituent ...... - (a) thinner - (b) drying oil - (c) drying oil - (d) extender 17. Paint is a mechanical dispersion mixture of one or more .... in a vehicle. - (a) thinner - (b) drying oil - (c) pigment - (d) monomer 18. Driers of paints are ...... - (a) pigments - (b) polymers - (c) catalysts - (d) none of these 19. Following is not a thinner ...... - (a) acetone - (b) turpentine - (c) spirit - (d) castor oil 20. Varnish is a homogeneous colloidal dispersion solution of ...... in oil or thinner or in both. - (a) pigment - (b) resin - (c) salt - (d) gypsum 21. The function of pigment is ...... - (a) to improve drying quality - (c) to give strength to the paint film - (b) to give adhesion - (d) to suspend pigments 22. In oil varnish, the role of oil is ..... - (a) to protect the film from cracking - (c) to provide colour to the film. - (b) reduce brittleness of resin film - (d) both (a) and (b) ## Engineering Materials and Catalysis ### Basic Science: Chemistry (Sem. I) 23. Name the constituent present in paint but not present in a varnish is ...... - (a) plasticizer - (b) drying oil - (c) pigment - (d) resin 24. A volatile organic constituents of paint is ...... - (a) pigment - (b) thinner - (c) drying oil - (d) all of these 25. Turpentine oil in paint is used as a ...... - (a) extender - (b) plasticizer - (c) thinner - (d) pigment 26. A constituent which increases the random arrangement of pigment in paint is ...... - (a) plasticizer - (b) thinner - (c) extender or filler - (d) resin 27. Identity the constituents which is used to fill the voids and pores in the paint ...... - (a) drier - (b) thinner - (c) extender or filler - (d) plasticizer 28. Red pigment is ...... - (a) ferric oxide - (b) ferrous oxide - (c) carbon black - (d) lithopone 29. Plasticizer is added to paint in order to ...... - (a) give high hiding power - (c) reduce viscosity - (b) give transparent finish - (d) avoid cracking of paint film 30. In a paint, dehydrated castor oil is used as ...... - (a) thinner - (b) drying oil - (c) drier - (d) extender 31. The constituents of paint which provide opacity and desired colour to paint are ...... - (a) pigments - (b) thinners - (c) driers - (d) extenders 32. The constituents of paint which reduce the cost of the paint are ...... - (a) pigments - (b) thinners - (c) driers - (d) extenders 33. The constituents of paint which reduce viscosity of the paint are ...... - (a) pigments - (b) thinners - (c) driers - (d) extenders 34. The constituents of paint which act as oxygen carrier catalysts are ...... - (a) pigments - (b) thinners - (c) driers - (d) extenders 35. The constituents of paint which give elasticity to the paint film are ...... - (a) pigments - (b) thinners - (c) plasticizers - (d) extenders 36. The colloidal solution of resin in oil or thinner or both is known as ...... - (a) paint - (b) varnish - (c) insulator - (d) plasticizer 37. Copal varnish is an example of ...... - (a) paint - (b) insulator - (c) oil varnish - (d) spirit varnish 38. Shellac in spirit is an example of ...... - (a) paint - (b) insulator - (c) oil varnish - (d) spirit varnish 39. The substance added in spirit varnish to avoid crack is ...... - (a) paint - (b) thinner - (c) pigment - (d) plasticizer 40. Volatile solvent used in spirit varnish is ...... - (a) linseed oil - (b) turpentine - (c) methylated alcohol - (d) petrol ## Insulators 1. The materials which are used to prevent the flow of heat are known as ...... - (a) insulators - (b) conductors - (c) semiconductors - (d) paints 2. Which one is not an insulating material ? - (a) glass wool - (b) thermocole - (c) asbestos - (d) iron 3. Glass wool and thermocole are used as an insulator in ...... - (a) fridge and microwave oven - (c) furnaces - (b) laptop - (d) none of these 4. Which statement is true for insulators ? - (a) they have high density and fire resistance - (c) they are not water proof. - (b) they have low density - (d) they are not electric proof 5. What material would be safest to use as an insulator to cover electrical wires ? - (a) aluminium - (b) tin - (c) rubber - (d) water 6. Copper wire is often wrapped in plastic, plastic material is a good ...... - (a) electromagnet - (b) insulator - (c) conductor - (d) circuit 7. A good thermal insulator should have ...... - (a) high thermal conductivity - (c) high electrical conductivity - (b) low thermal conductivity - (d) low electrical conductivity 8. Glass wool is made up of ...... - (a) ordinary wool - (b) filaments of glass - (c) filaments of mica - (d) none of these 9. Thermocole is ...... - (a) monomer - (b) polymer - (c) plastic - (d) both (b) and (c) 10. Insulators are classified on the basis of ...... - (a) manufacturing - (b) state of occurrence - (c) application - (d) all of these 11. Following is not a solid insulating material ...... - (a) porcelain - (b) paper - (c) silicon rubber - (d) dry air 12. Refined hydrocarbons are ...... - (a) solid insulators - (b) liquid insulators - (c) gaseous insulators - (d) none of these 13. ...... is an example of thermal insulator. - (a) Cork - (b) Asbestos - (c) Glass wool - (d) all of these 14. ...... is an inorganic thermal insulator. - (a) Rubber - (b) Glass wool - (c) Silk - (d) Wool 15. ...... is not an insulating material.. - (a) Asbestos - (b) Thermocole - (c) Copper - (d) Glass wool 16. ...... is an example of gaseous insulator. - (a) Silicon liquid - (b) Dry air - (c) Alumina - (d) Thermocole 17. Glass is good insulator because of ...... - (a) non-combustible and fire proof property. - (c) low electrical conductivity. - (b) varnish - (d) all of these 18. The substance that prevent the loss of heat is ...... - (a) paint - (b) varnish - (c) thermal insulator - (d) plasticizer 19. Handle of saucepans and other cooking utensils are made up of ...... - (a) paint - (b) varnish - (c) thermal insulator - (d) plasticizer 20. Electric wires are covered by ...... - (a) paint - (b) varnish - (c) thermal insulator - (d) plasticizer 21. Thermal conductivity of thermal insulator is ...... - (a) very high - (b) high - (c) low - (d) moderate 22. Density of thermal insulator is ...... - (a) very high - (b) high - (c) low - (d) moderate 23. Thermal insulator used to filter corrosive liquids in industry is ...... - (a) cotton - (b) glass wool - (c) wool - (d) thermocole 24. Thermal insulator used to protect screen in radar is ...... - (a) cotton - (b) glass wool - (c) wool - (d) thermocole ## Polymers and Monomers ### Basic Science: Chemistry (Sem. I) 1. Plastic is a polymer formed by ...... - (a) decantation - (b) vulcanisation - (c) polymerization - (d) evaporation 2. Which are the types of polymerization ? - (a) addition and condensation - (c) condensation and malleability - (b) evaporation and addition - (d) none of these 3. On the basis of structure, polymers can be classified as ...... - (a) copolymer, homopolymer - (c) thermosoftening and thermosetting - (b) linear and cross link - (d) none of these 4. Which one is a type of thermosetting polymer ? - (a) polyethylene - (b) PVC - (c) teflon - (d) nylon 5. Which one is a type of thermosoftening polymer? - (a) nylon - (b) bakelite - (c) urea formaldehyde - (d) teflon 6. The polymer which is formed by joining of two different monomers is called as ...... - (a) homopolymer - (b) heteropolymer - (c) copolymer - (d) both (b) and (c) 7. Structural units of a high polymer are called ...... - (a) fibers - (b) monomers - (c) thermo units - (d) fabrics 8. A thermoplastic is formed by the phenomenon of ...... - (a) chlorination - (b) condensation polymerisation - (c) addition polymerisation - (d) distillation 9. A copolymer is formed by the union of two or more ...... - (a) molecules of same monomers by the elimination of small molecules like water - (b) monomer molecules in a chain without the elimination of water - (c) monomer molecules with the elimination of small molecules like water - (d) all of these 10. Phenol-formaldehyde resin is commercially known as ...... - (a) PVC - (b) elastomer - (c) teflon - (d) bakelite 11. Polymer commonly used for making fibre/cloth is ...... - (a) rubber - (b) PVC - (c) nylon - (d) bakelite 12. Bakelite is prepared by the condensation of ...... - (a) benzene and formaldehyde - (b) phenol and formaldehyde - (c) phenol and acetaldehyde - (d) phenol and chloroform 13. A high molecular weight material that can be moulded in any desired shape is ...... - (a) graphite - (b) polymer - (c) jelly - (d) grease 14. A polymer which can be softened on heating and hardened on cooling is called ...... - (a) thermoelastic - (b) thermoplastic - (c) thermosetting - (d) thermite 15. Phenol-formaldehyde is an example of ...... - (a) linear chain polymer - (c) cross-link polymer - (b) elastomer - (d) all of these 16. Which one of the following is not a plastic ? - (a) PVC - (b) bakelite - (c) elastomer - (d) nylon 17. One of the important uses of bakelite is for making ...... - (a) cables - (b) electrical switches - (c) cloth - (d) hose pipe 18. The raw material for the manufacturing of PVC is ...... - (a) ethylene - (b) vinyl chloride - (c) phenol - (d) styrene 19. Which one is a copolymer ? - (a) nylon - (b) teflon - (c) PVC - (d) polystyrene 20. What is the repeating unit in teflon ? - (a) F2C = CF2 - (b) H2C = CH2 - (c) H₂C = CH-CI - (d) H2C = CH - C6H5 21. Which one is not a thermoplastic ? - (a) polyethylene - (b) PVC - (c) bakelite - (d) teflon 22. Molecular mass of a polymer is ...... - (a) small - (b) very small - (c) large - (d) negligible 23. Which of the following polymers are hard ? - (a) polyethylene - (b) PVC - (c) thermoplastic - (d) all of these 24. Which formation is an example of addition polymerization ? - (a) nylon - (b) ethylene - (c) polyethylene - (d) bakelite 25. Which of the following has cross-links ? - (a) nylon - (b) nylon 66 - (c) bakelite - (d) phenol-formaldehyde resin 26. Tetrafluoroethylene is the monomer of ...... - (a) nylon - (b) teflon - (c) PVC - (d) polyethylene 27. Which of the following polymers contain nitrogen ? - (a) nylon - (b) teflon - (c) PVC - (d) polyethylene 28. Bakelite is formed by the combination of phenol and ...... - (a) formaldehyde - (b) formic acid - (c) methyl alcohol - (d) glycol 29. PVC is ...... - (a) inflammable - (b) non-flammable - (c) a thermoset - (d) an elastomer 30. A polymer used mostly for forming textile fibres is ...... - (a) PVC - (b) nylon - (c) bakelite - (d) all of these 31. A polymer which cannot be softened by reheating is called ...... - (a) thermoplastic - (b) monomer - (c) thermosetting polymer - (d) rubber 32. Polymerization of ethylene produces ...... - (a) linear chain polymer - (b) alcohol - (c) elastomer - (d) cross-link polymer 33. Epoxy resin is an example of ...... - (a) copolymer - (b) araldite - (c) homopolymer - (d) elastomer 34. Commercial name of epoxy resin is ...... - (a) copolymer - (b) monomer - (c) ammonia - (d) ebonite 35. On the basis of type of monomer, the polymers are classified as ...... - (a) homopolymers - (c) copolymers - (b) homopolymers and copolymers - (d) none of these 36. Epoxy resins are obtained from ...... - (a) phenol + phenol - (c) phenol + vinyl chloride - (b) bisphenol + epichlorohydrin - (d) benzene + phenol 37. Along with polymer, a byproduct is liberated during ...... - (a) addition polymerization - (c) both (a) and (b) - (b) condensation polymerizaton - (d) none of these 38. Monomer CH2 = CHCI produces ...... polymer on polymerization. - (a) RVC - (b) MVC - (c) PVC - (d) WBC 39. Teflon is also known as ...... - (a) polytetrafloro ethylene - (c) polytetrafloro ethylene - (b) polytetrafloro benzene - (d) polytetrafloro alcohol 40. Handles of hot pans and heaters are made up of ...... - (a) Carbon - (b) Copper - (c) bakelite - (d) teflon ## Adhesives 1. Adhesive is a substance used ...... - (a) for sticking two unlike bodies together - (c) for purification of water - (b) for mixing metals and non-metals - (d) for making alloy 2. Which is not the property of adhesives ? - (a) degree of tackiness - (c) strength of bond on drying - (b) rapidity of bonding - (d) time required for cooling 3. Which one is not an adhesive ? - (a) phenol-formaldehyde resin - (c) araldite - (b) urea-formaldehyde resin - (d) duralumin 4. Which of these adhesives will glue mdf to acrylic ? - (a) PVA (Poly vinyl acetate) - (c) tensol cement - (b) epoxy resin - (d) none of these 5. Adherends means ...... - (a) bodies held together by an adhesive - (c) substance used to stick two bodies - (b) bonding which hold two bodies together - (d) force between two bodies 6. An adhesive which commonly finds application in aircraft industry is ...... - (a) starch - (b) animal glue - (c) araldite - (d) plexiglass 7. An example of natural adhesive used in stamps, envelops etc. is ...... - (a) starch - (b) asphalt - (c) araldite - (d) wax 8. An example of vegetable glue is ...... - (a) soyabean glue - (b) casein glue - (c) both (a) and (b) - (d) none of these 9. Glue is ...... - (a) pure protein and other animal substances - (b) impure glue, pure protein and other animal substances - (c) rubber - (d) polymer 10. Adhesive used for making packing kit, paper boxes, card-board containers etc. is ...... - (a) shellac resin - (b) casein glue - (c) animal glue - (d) sodium silicate 11. An example of inorganic adhesive is ...... - (a) casein - (b) plexi glass - (c) araldite - (d) sodium silicate 12. Phenol-formaldehyde resin finds applications in manufacturing ...... - (a) card boxes - (b) conveyor belts - (c) furniture - (d) laminates 13. Araldite is ...... - (a) vegetable glue - (b) thermosetting resin - (c) thermoplastic resin - (d) cellulose derivative 14. Adhesives generally used in manufacturing of furniture, radio-cabinates, card boxes, etc. are ...... - (a) vegetable glue - (b) animal glue - (c) starch - (d) sodium silicate 15. Which of the following is not a natural adhesive ? - (a) asphalt - (b) shellac - (c) soyabean - (d) resin 16. Highly thick adhesive produces ...... - (a) thick film having good adhesion - (c) thin film having good adhesion - (b) thick film having poor adhesion - (d) thin film having poor adhesion 17. Adhesive used for bonding metal is ...... - (a) epoxy resin - (b) silicone resin - (c) both of these - (d) none of these 18. Which of the following give least adhesive strength ? - (a) animal glue - (b) starch - (c) epoxy resin - (d) silicone resin 19. Adhesive used for bonding glass, metals, ceramics is ...... - (a) animal glue - (b) starch - (c) epoxy resin - (d) sodium silicate 20. ...... is the thermosetting synthetic adhesive. - (a) Polythene - (b) Acetylene - (c) Resin - (d) Polyurethane ## Lubricants 1. Graphite is which type of lubricant ? - (a) solid - (b) semi-solid - (c) liquid - (d) gaseous 2. Lubricant helps to get ...... - (a) frictionless motion of machine parts - (c) more amount of heat in machine parts - (b) more friction between machine parts - (d) none of these 3. Lubricating oil ...... - (a) minimizes wear in moving parts of a machine - (b) helps in keeping the machine parts cool - (c) washes away and carries away dirt, from machine parts - (d) all of these 4. Viscosity Index (V.I.) is a measure for change of viscosity with change in ...... - (a) pressure - (b) volume - (c) density - (d) temperature 5. A lubricant is used with the object of ...... - (a) increasing frictional heat between machine parts - (b) increasing resistance of machine part - (c) providing direct contact of two rubbing surfaces - (d) decreasing friction resistance 6. A liquid lubricant should possess high ...... - (a) volatility - (b) oiliness - (c) acidity - (d) cost 7. In case of liquid lubricants generally ...... - (a) flash point is higher than fire point - (c) fire point is lower than flash point - (b) fire point is same as flash point - (d) flash point is lower than fire point 8. Grease is not used to lubricate ...... - (a) gears - (b) bearings working at high temperature - (c) delicate instruments - (d) none of these 9. Grease is prepared by saponification of ...... - (a) oil - (b) fatty acids with oil - (c) solid lubricants - (d) all of these 10. A good lubricant should have ...... - (a) moderate viscosity - (b) low viscosity index - (c) low acidity - (d) all of these 11. A good lubricant should have ...... - (a) high acidity number - (c) high saponification value - (b) low emulsification value - (d) low fire point 12. Soap, stone, waxes, talc are the examples are ...... - (a) solid lubricants - (b) semi-solid lubricants - (c) liquid lubricants - (d) gaseous lubricants 13. "MoS2" is a solid lubricant and known as ...... - (a) medium oxygen disulphate - (c) mole of oxygen and sulphur - (b) molybdenum disulphide - (d) none of these 14. The process of reducing frictional resistance between moving or sliding parts by introducing a material is called as ...... - (a) polymerisation - (b) alloying - (c) lubrication - (d) crystallisation 15. Which one is a synthetic lubricant ? - (a) vegetable oil - (b) mineral oil - (c) animal oil - (d) none of these 16. Which one is not a vegetable oil ? - (a) tallow oil - (b) coconut oil - (c) olive oil - (d) palm oil 17. A lubricant is used with the object of ...... - (a) increasing fractional heat - (c) decreasing fractional resistance - (b) increasing resistance - (d) providing direct contact between rubbing surfaces 18. A lubricant should possess high ...... - (a) volatility - (b) acidity - (c) oiliness - (d) none of these 19. A lubricant is used primarily to prevent ...... - (a) corrosion of metals - (b) oxidation of metal - (c) wearing out of rubbing metallic surface - (d) reduction of metals 20. A good lubricant should have ...... - (a) low viscosity index - (c) low fire point - (b) high viscosity index - (d) high volatility 21. Lubricant used in machine working at low temperature should possess ...... - (a) low viscosity index - (c) high cloud point - (b) low flash point - (d) low pour point 22. Capacity of oil to stick on the surface of machine parts under the condition of heavy load is called ...... - (a) volatility - (b) oiliness - (c) acid value - (d) flash point 23. Mineral oils are ...... - (a) very costly - (b) poor in oiliness - (c) unstable - (d) easily oxidized 24. Animal and vegetable oils are ...... - (a) very cheap - (b) not oxidized easily - (c) not thickened in use - (d) good in oiliness 25. Greases are not used to lubricate ...... - (a) rail axle boxes - (c) bearing working at high temperatures - (b) gears - (d) delicate instruments 26. Machines operating under high temperature and load are best lubricated by ...... - (a) mineral oils - (b) solid lubricants - (c) greases - (d) animal oil 27. When graphite is disposed in oil, it is called as ...... - (a) grease - (b) aquadag - (c) oil-dag - (d) blended oil 28. When graphite is disposed in water, it is called as ...... - (a) grease - (b) aquadag - (c) oil-dag - (d) blended oil 29. Single most important property of lubricated oil is ...... - (a) its fire point - (b) cloud point - (c) oiliness - (d) viscosity index 30. The lubricant stable at 300 ℃ to 400 ℃ temperature is ...... - (a) MoS2 - (b) graphite - (c) vegetable oil - (d) mineral oil 31. Viscosity of oil is measured by using ...... - (a) Redwood viscometer - (c) Saybolt viscometer - (b) - (d) all of these 32. Greases are prepared by saponification of ...... - (a) oil - (b) fatty acids with oil - (c) solid lubricants - (d) all of these 33. The temperature at which lubricating oil will give off sufficient vapours to form combustible mixture with air is known as ...... - (a) flash point - (b) fire point - (c) pour point - (d) combustion point 34. Which temperature for a lubricating oil will be lowest ...... - (a) flash point - (b) fire point - (c) pour point - (d) boiling point 35. Identify liquid lubricant from the following ...... - (a) graphite - (b) lubricating oil - (c) MoS2 - (d) all of these 36. Identify the odd type of lubricant from the following ...... - (a) semi-solid - (b) liquid - (c) gaseous - (d) solid 37. Graphite is ...... lubricant. - (a) solid - (b) liquid - (c) semi-solid - (d) none of these 38. Calcium soap base grease is also called as ...... - (a) soap grease - (b) greases - (c) axle grease - (d) cup grease ## Catalysis 1. Substances which alter the rate of chemical reaction without undergoing any chemical change are called as ...... - (a) polymers - (b) catalysts - (c) products - (d) none of these 2. The process in which catalyst has a different phase to a reaction mixture is known as ...... - (a) homogeneous catalysis - (c) heterogeneous catalysis - (b) hypergeneous catalyst - (d) hypogeneous catalyst 3. The substances that reduce the effectiveness of a catalyst are called ...... - (a) promoters - (b) autocatalysts - (c) inhibitors - (d) none of these 4. A catalyst cannot affect...... - (a) products - (b) rate of reaction - (c) reactants - (d) both (a) and (b) 5. When catalyst and reactants are in the same phase then it is called...... - (a) homogeneous catalysis - (c) autocatalysis - (b) heterogeneous catalysis - (d) catalysis 6. When a product acts as a catalyst then it is called as ...... - (a) self catalysis - (b) positive catalysis - (c) autocatalysis - (d) negative catalysis 7. A substance alters (increase or decrease) the rate of a chemical reaction without undergoing any chemical change at the end of reaction is called as ...... - (a) polymers - (b) catalyst - (c) products - (d) none of these 8. A substance alters (only increase or accelerate) the rate of a chemical reaction without undergoing any chemical change at the end of reaction is called as ...... - (a) positive catalyst - (b) negative catalyst - (c) inhibitor - (d) promoter 9. A substance alters (only decrease or retard) the rate of a chemical reaction without undergoing any chemical change at the end of reaction is called as ...... - (a) positive catalyst