Description : Nylon-66 compared to nylon-6 has (A) Lower melting point (B) More abrasion resistant properties (C) Higher hardness (D) All (A), (B) and (C)
Last Answer : (C) Higher hardness
Description : Nylon-6 as compared to Nylon-66 is having higher (A) Hardness (B) Abrasion/resistance (C) Melting point (D) None of these
Last Answer : (D) None of these
Description : Nylon-6 as compared to nylon-66 is (A) Harder (B) More abrasion resistant (C) Having higher melting point (D) None of these
Description : Higher percentage of ash in coal meant for the production of metallurgical grade coke (A) Decreases the hardness of coke (B) Decreases the abrasion resistance of coke (C) Causes brittleness in steel (D) None of these
Description : Increase in ash content of blast furnace coke (A) Reduces its consumption in the furnace (B) Increases its consumption in the furnace (C) Does not affect its consumption in the furnace (D) Decreases its hardness and abrasion resistance
Last Answer : (B) Increases its consumption in the furnace
Description : Non-ferrous alloys used for making cutting tools need not have high (A) Abrasion resistance (B) Toughness (C) Red hardness (D) Cutting speed
Last Answer : (C) Red hardness
Description : M10 index of coke indicates its (A) Compressive strength (B) Hardness (C) Abrasion resistance (D) Impact strength
Last Answer : Option C
Description : M10 index of coke indicates its (A) Compressive strength (B) Hardness (C) Abrasion resistance (D) Impact strength Answer: Option C
Description : Polyhexamethylene adipamide is also known as (A) Bakelite (B) Nylon-66 (C) Epoxy resin (D) Silicone rubber
Last Answer : (B) Nylon-66
Description : 38. Which of the following statements is false? (1) Both starch and cellulose are polymers of glucose (2) Artificial silk is derived from cellulose (3) Nylon-66 is an example of elastomer (4) The repeat unit in natural rubber is isoprene
Last Answer : Nylon-66 is an example of elastomer
Description : The clinical advantage of porcelain laminate veneers over composite resin veneers is: A. Color stability and resistance to abrasion B. Availability of self-curing or light activated placement (yes but not ... dentist's abilities) D. May be used in edge to edge occlusion or Class III relationships.
Last Answer : A. Color stability and resistance to abrasion
Description : Pick out the wrong statement. (A) Cokes of high reactivity are obtained from weakly coking coals (B) Cokes of high reactivity are obtained from strongly coking coals (C) Reactivity of coke is inversely proportional to its absolute density (D) Abrasion index of the coke is a measure of its hardness
Last Answer : (B) Cokes of high reactivity are obtained from strongly coking coals
Description : Tin base and lead base alloys are used for bearing materials. Tin compared to lead has lower (A) Price (B) Corrosion resistance (C) Thermal conductivity (D) Abundant availability
Last Answer : (D) Abundant availability
Description : Polycaprolactam is (A) Nylon-6 (B) Nylon-66 (C) Dacron (D) Rayon
Last Answer : (A) Nylon-6
Description : Polycaprolactam is also known as (A) Nylon-66 (B) Nylon-6 (C) Teflon (D) SBR
Last Answer : (B) Nylon-6
Description : 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
Description : Polycaprolactam is nothing but (A) Orlon (B) Nylon-66 (C) Nylon-6 (D) Saran
Last Answer : (C) Nylon-6
Description : Bristles of tooth brushes are made of (A) Nylon-6 (B) Nylon-66 (C) Polystyrene (D) PVC
Description : In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the (A) Hexamethylene diamine and the ring (B) Hexamethylene diamine and the adipic acid (C) Adipic acid and the ring (D) None of these
Last Answer : (B) Hexamethylene diamine and the adipic acid
Description : 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
Last Answer : (C) Diamine and the dibasic acid
Description : Polycaprolactam is commercially known as (A) Nylon-6 (B) Nylon-66 (C) Dacron (D) Rayon
Description : Nylon-66 is so named because the (A) Average degree of polymerisation of the polymer is 1966 (B) Number of carbon atoms between two nitrogen atoms are 6 (C) Number of nitrogen atoms between two carbon atoms are 6 (D) Polymer was first synthesised in 1966
Last Answer : (A) Average degree of polymerisation of the polymer is 1966
Description : Dacron (or Treylene) 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)
Last Answer : (D) All (A), (B) and (C)
Description : 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)
Description : 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) Chloroprene (C) Isoprene (D) None of these
Last Answer : (B) Chloroprene
Description : A metallic alloy in general as compared to their pure metal components is (A) More corrosion resistant (B) Having higher melting point (C) Having lower hardness, reactivity and fusibility (D) Having lower electrical conductivity
Last Answer : (A) More corrosion resistant
Description : Arrange the following Polymers in increasing order of inter molecular forces. (a) Nylon 66, Buna-S and Polythene (b) Nylon 6, Neoprene and PVC
Last Answer : Ans: (a) Buna-S, Polythene and Nylon 66. (b) Neoprene, PVC and Nylon 6.
Description : Why are the numbers 6, 6 and 6 put in the name of Nylon 66 and Nylon 6?
Last Answer : Ans: Nylon 66 means that it is formed by two monomers each containing six carbon atoms. While in Nylon 6 means that it is formed by a monomer containing six carbon atoms.
Description : Before filling a class V abrasion cavity with GIC you should(+adc March07) A. Clean with pumice, rubber cup, water and weak acid B. Dry the cavity thoroughly before doing anything C. Acid itch cavity then dry thoroughly
Last Answer : A. Clean with pumice, rubber cup, water and weak acid
Description : __________ is not a condensation polymer. (A) Teflon (B) Nylon-66 (C) Dacron (D) Polystyrene
Last Answer : (A) Teflon
Description : Adipic acid is an intermediate in the manufacture of (A) Perspex (B) Nylon-66 (C) Polystyrene (D) Bakelite
Description : Nylon-66 is a polyamide of (A) Hexamethylene diamine and adipic acid (B) Adipic acid and methyl amine (C) Vinyl chloride and formaldehyde (D) None of these
Last Answer : (A) Hexamethylene diamine and adipic acid
Description : Chain growth polymerisation is a process, in which the monomers are added in a chain fashion, and it requires an initiator to produce the free radical. An example of chain growth polymerisation products is (A) Nylon-66 (B) Teflon (C) Polyester (D) Bakelite
Last Answer : (B) Teflon
Description : Nylon-66 is manufactured from (A) Adipic acid and Hexamethylene diamine (B) Caprolactam (C) Maleic anhydride and Hexamethylene diamine (D) Dimethyl terephthalate (DMT) and ethylene glycol
Last Answer : (A) Adipic acid and Hexamethylene diamine
Description : __________ is a homopolymer. (A) Neoprene (B) Bakelite (C) Nylon-66 (D) Terylene
Last Answer : (A) Neoprene
Description : Phenol formaldehyde is produced by condensation polymerisation. It is also known as (A) Teflon (B) Bakelite (C) Polyester (D) Nylon-66
Last Answer : (B) Bakelite
Description : The inter particle forces between linear chains in nylon-66 are __________ bonds. (A) Hydrogen (B) Covalent (C) Ionic (D) None of these
Last Answer : (A) Hydrogen
Description : __________ is a copolymer. (A) Nylon-66 (B) Polypropylene (C) PVC
Last Answer : (A) Nylon-66
Description : Synthetic polymer produced by using terephthalic acid and ethylene glycol is (A) Terylene (B) Nylon-66 (C) PVC (D) Polystyrene
Last Answer : (A) Terylene
Description : The organic acid monomer in nylon-66 is (A) Sebacic acid (B) Terephthalic acid (C) Adipic acid (D) Benzoic acid
Last Answer : (C) Adipic acid
Description : Which of the following has the weakest intermolecular forces? (A) Polyisoprene (B) Nylon-66 (C) Polystyrene (D) Bakelite
Last Answer : (A) Polyisoprene
Description : Adipic acid is an intermediate in the manufacture of (A) Perspex (B) Nylon-66 (C) Polystyrene (D) Bakelit
Description : Nylon-66 is manufactured from (A) Hexamethylene diamine and adipic acid (B) Hexamethylene diamine and Maleic anhydride (C) Caprolactam (D) Dimethyl terephthalate and ethylene glycol
Description : P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as (A) Bakelite (B) Neoprene (C) Teflon (D) Nylon-66
Last Answer : (C) Teflon
Description : Pick up the correct statement from the following: (A) Catalysts are added to assist and accelerate the hardening of resin (B) The fillers are inert materials and they impart strength and hardness (C) Fibrous fillers increase thermal resistance (D) All the above
Last Answer : Answer: Option D
Description : Pick out the wrong statement (A) Cold rubber (SBR) is superior as compared to hot rubber (SBR) (B) Polymerisation temperature can modify the properties of SBR (C) Production of cold SBR employs lower pressure as compared to that of hot SBR (D) None of these
Description : Nylon-66 is obtained from:
Last Answer : Nylon-66 is obtained from: A. Hexamethylene diamine and adipic acid B. Phenol and formaldehyde C. ... and adipic acid D. Adipic acid and phthalic acid
Description : ______ fiber is used in making bulletproof vests. (1) Nylon-66 (2) Terylene (3) Kevlar (4) Lexan
Last Answer : (3) Kevlar Explanation: Kevlar, a para-aramid synthetic fiber, is used for making bullet proof vests protective inserts.
Description : The polymer obtained by the condensation of hexamethylene diamine and adipic acid is – (1) Nylon 66 (2) Terylene (3) Tollen's (4) Bakelite
Last Answer : (1) Nylon 66 Explanation: Polymers are very high molecular mass substances each molecule of which consists of very large number of simple structural units joined together though covalent bonds ... the repeating structural unit is derived from two monomer units - hexamethylenediamine and adipic acid.