Engineering Sciences - XE 2018 GATE Paper with solution - Set -7 GATE Notes | EduRev

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GATE : Engineering Sciences - XE 2018 GATE Paper with solution - Set -7 GATE Notes | EduRev

 Page 1


GATE 2018   Polymer Science & Engineering (XE – F) 
XE – F  1/6 
XE (F): Q. 1 – Q. 9 carry one mark each & Q. 10 – Q. 22 carry two marks each. 
Q.1  Which one of the following polymers occurs naturally?  
(A)  Bakelite (B)  Teflon (C)   Cellulose (D)  Perspex 
 
 
Q.2  The order of average molecular weights of a polymer is 
(A)   Mz > Mw > Mv > Mn  
(B)   Mw > Mz > Mn  > Mv 
(C)   Mn > Mw > Mv > Mz 
(D)   Mz > Mv >  Mn > Mw 
 
 
Q.3  Rubbers are a class of polymer known for 
(A)   High intermolecular forces 
(B)   High Tg polymers 
(C)   Crystalline polymers 
(D)   Low intermolecular forces  
 
 
Q.4  Nylon 6 is manufactured from 
(A)   Sebacic acid and hexamethylene diamine  
(B)   Caprolactam  
(C)   Adipic acid and hexamethylene diamine 
(D)   Caprolactone 
 
 
Q.5  Storage modulus and tan d of a polymer are experimentally measured by 
(A)  Differential scanning calorimetry 
(B)  Thermogravimetric analysis 
(C)  Thermomechanical analysis 
(D)  Dynamic mechanical thermal analysis 
 
 
Q.6  A plastic bucket is manufactured by 
(A)  Compression moulding  
(B)  Injection moulding  
(C)  Extrusion  
(D)  Blow moulding  
 
 
Q.7  The monomers, A and B with reactivity ratios rA and rB, form alternate copolymers when, 
(A)   rA = rB = 0 (B)   rA = rB = 1 (C)  rA > 1,  rB  > 1 (D)   rA < 1,  rB  < 1 
 
 
 
Page 2


GATE 2018   Polymer Science & Engineering (XE – F) 
XE – F  1/6 
XE (F): Q. 1 – Q. 9 carry one mark each & Q. 10 – Q. 22 carry two marks each. 
Q.1  Which one of the following polymers occurs naturally?  
(A)  Bakelite (B)  Teflon (C)   Cellulose (D)  Perspex 
 
 
Q.2  The order of average molecular weights of a polymer is 
(A)   Mz > Mw > Mv > Mn  
(B)   Mw > Mz > Mn  > Mv 
(C)   Mn > Mw > Mv > Mz 
(D)   Mz > Mv >  Mn > Mw 
 
 
Q.3  Rubbers are a class of polymer known for 
(A)   High intermolecular forces 
(B)   High Tg polymers 
(C)   Crystalline polymers 
(D)   Low intermolecular forces  
 
 
Q.4  Nylon 6 is manufactured from 
(A)   Sebacic acid and hexamethylene diamine  
(B)   Caprolactam  
(C)   Adipic acid and hexamethylene diamine 
(D)   Caprolactone 
 
 
Q.5  Storage modulus and tan d of a polymer are experimentally measured by 
(A)  Differential scanning calorimetry 
(B)  Thermogravimetric analysis 
(C)  Thermomechanical analysis 
(D)  Dynamic mechanical thermal analysis 
 
 
Q.6  A plastic bucket is manufactured by 
(A)  Compression moulding  
(B)  Injection moulding  
(C)  Extrusion  
(D)  Blow moulding  
 
 
Q.7  The monomers, A and B with reactivity ratios rA and rB, form alternate copolymers when, 
(A)   rA = rB = 0 (B)   rA = rB = 1 (C)  rA > 1,  rB  > 1 (D)   rA < 1,  rB  < 1 
 
 
 
GATE 2018   Polymer Science & Engineering (XE – F) 
XE – F  2/6 
Q.8  The degree of polymerization of a poly(methyl methacrylate) sample having number 
average molecular weight of 1,50,000 g/mol is___________. 
(C = 12, H = 1, O = 16 g/mol). 
 
Q.9  If the heat of fusion of 100 % crystalline polyethylene is 290 mJ/mg, a sample of 
polyethylene with heat of fusion of 141 mJ/mg will have_______ % crystallinity.  
 
 
Q.10  Match the following:  
 
P. Butyl rubber 1. Metallocene polymerization 
Q. Cold SBR 2. Cationic polymerization 
R. Poly(ethylene terephthalate) 3. Redox polymerization 
S. Polypropylene 4. Condensation polymerization 
 
 
(A)  P-3; Q-1;  R-2; S-1 (B)  P-2;  Q-3; R-1; S-4 
(C)  P-4; Q-3;  R-1; S-2 (D)  P-2; Q-3;  R-4; S-1  
 
 
Q.11  Match the following: 
 
P. Polyaramid 1. Baby-feeding nipple   
Q. Polytetrafluoroethylene  2. Optical glasses 
R. Polycarbonate 3. Non-stick cookware 
S. Poly(dimethyl siloxane) 4. Bullet-proof jacket 
 
 
(A)  P-4; Q-3; R-2; S-1  
 
(B)  P-2; Q-3; R-4; S-1 
(C)  P-4; Q-1; R-2; S-3 (D)  P-3; Q-4; R-2; S-1 
 
 
Q.12  Flexible PVC tubes are used for watering. If some organic solvents are passed through this 
tube, it becomes stiff. This is due to the fact that the organic solvents 
(A) plasticize PVC and raise Tg. 
(B) remove plasticizer and raise Tg. 
(C) remove plasticizer  and lower Tg. 
(D) react with PVC and increase Tg 
 
 
Q.13  Match the following: 
 
P. Plastic egg container 1. Injection moulding 
Q. Water tank 2. Extrusion 
R. Chair 3. Rotational moulding 
S. Cable 4. Thermoforming 
 
 
(A)  P-3; Q-1; R-4; S-2 
 
(B)  P-4; Q-3; R-2; S-1 
(C)  P-2; Q-3; R-4; S-1 (D)  P-4; Q-3; R-1; S-2 
 
Page 3


GATE 2018   Polymer Science & Engineering (XE – F) 
XE – F  1/6 
XE (F): Q. 1 – Q. 9 carry one mark each & Q. 10 – Q. 22 carry two marks each. 
Q.1  Which one of the following polymers occurs naturally?  
(A)  Bakelite (B)  Teflon (C)   Cellulose (D)  Perspex 
 
 
Q.2  The order of average molecular weights of a polymer is 
(A)   Mz > Mw > Mv > Mn  
(B)   Mw > Mz > Mn  > Mv 
(C)   Mn > Mw > Mv > Mz 
(D)   Mz > Mv >  Mn > Mw 
 
 
Q.3  Rubbers are a class of polymer known for 
(A)   High intermolecular forces 
(B)   High Tg polymers 
(C)   Crystalline polymers 
(D)   Low intermolecular forces  
 
 
Q.4  Nylon 6 is manufactured from 
(A)   Sebacic acid and hexamethylene diamine  
(B)   Caprolactam  
(C)   Adipic acid and hexamethylene diamine 
(D)   Caprolactone 
 
 
Q.5  Storage modulus and tan d of a polymer are experimentally measured by 
(A)  Differential scanning calorimetry 
(B)  Thermogravimetric analysis 
(C)  Thermomechanical analysis 
(D)  Dynamic mechanical thermal analysis 
 
 
Q.6  A plastic bucket is manufactured by 
(A)  Compression moulding  
(B)  Injection moulding  
(C)  Extrusion  
(D)  Blow moulding  
 
 
Q.7  The monomers, A and B with reactivity ratios rA and rB, form alternate copolymers when, 
(A)   rA = rB = 0 (B)   rA = rB = 1 (C)  rA > 1,  rB  > 1 (D)   rA < 1,  rB  < 1 
 
 
 
GATE 2018   Polymer Science & Engineering (XE – F) 
XE – F  2/6 
Q.8  The degree of polymerization of a poly(methyl methacrylate) sample having number 
average molecular weight of 1,50,000 g/mol is___________. 
(C = 12, H = 1, O = 16 g/mol). 
 
Q.9  If the heat of fusion of 100 % crystalline polyethylene is 290 mJ/mg, a sample of 
polyethylene with heat of fusion of 141 mJ/mg will have_______ % crystallinity.  
 
 
Q.10  Match the following:  
 
P. Butyl rubber 1. Metallocene polymerization 
Q. Cold SBR 2. Cationic polymerization 
R. Poly(ethylene terephthalate) 3. Redox polymerization 
S. Polypropylene 4. Condensation polymerization 
 
 
(A)  P-3; Q-1;  R-2; S-1 (B)  P-2;  Q-3; R-1; S-4 
(C)  P-4; Q-3;  R-1; S-2 (D)  P-2; Q-3;  R-4; S-1  
 
 
Q.11  Match the following: 
 
P. Polyaramid 1. Baby-feeding nipple   
Q. Polytetrafluoroethylene  2. Optical glasses 
R. Polycarbonate 3. Non-stick cookware 
S. Poly(dimethyl siloxane) 4. Bullet-proof jacket 
 
 
(A)  P-4; Q-3; R-2; S-1  
 
(B)  P-2; Q-3; R-4; S-1 
(C)  P-4; Q-1; R-2; S-3 (D)  P-3; Q-4; R-2; S-1 
 
 
Q.12  Flexible PVC tubes are used for watering. If some organic solvents are passed through this 
tube, it becomes stiff. This is due to the fact that the organic solvents 
(A) plasticize PVC and raise Tg. 
(B) remove plasticizer and raise Tg. 
(C) remove plasticizer  and lower Tg. 
(D) react with PVC and increase Tg 
 
 
Q.13  Match the following: 
 
P. Plastic egg container 1. Injection moulding 
Q. Water tank 2. Extrusion 
R. Chair 3. Rotational moulding 
S. Cable 4. Thermoforming 
 
 
(A)  P-3; Q-1; R-4; S-2 
 
(B)  P-4; Q-3; R-2; S-1 
(C)  P-2; Q-3; R-4; S-1 (D)  P-4; Q-3; R-1; S-2 
 
GATE 2018   Polymer Science & Engineering (XE – F) 
XE – F  3/6 
Q.14  Match the following: 
 
P. Flame retardant  1. 4-Methyl-2,6-di-t-butyl phenol 
Q. UV absorber 2. Azocarbonamide 
R. Blowing agent 3. Phenyl salisylate 
S. Antioxidant 4. Aluminium trihydrate 
 
(A)  P-4; Q-1; R-2; S-3 (B)  P-4; Q-3; R-2; S-1   
(C)  P-3; Q-4; R-2; S-1 (D)  P-2; Q-4; R-1; S-3 
 
 
Q.15   A plot of strain (%) versus time of a polymer is given below. Based on this plot and the 
properties as mentioned below, find out the correct combination. 
 
 
                      1 = Viscoelastic deformation; 2 = Elastic deformation 
                      3 = Viscoelastic recovery;       4 = Elastic recovery  
 
(A)   P-1; Q-4; R-2; S-3;  (B)  P-2; Q-3; R-4; S-1 
(C)   P-3; Q-1; R-2; S-4 (D)  P-2; Q-1; R-4; S-3  
 
Page 4


GATE 2018   Polymer Science & Engineering (XE – F) 
XE – F  1/6 
XE (F): Q. 1 – Q. 9 carry one mark each & Q. 10 – Q. 22 carry two marks each. 
Q.1  Which one of the following polymers occurs naturally?  
(A)  Bakelite (B)  Teflon (C)   Cellulose (D)  Perspex 
 
 
Q.2  The order of average molecular weights of a polymer is 
(A)   Mz > Mw > Mv > Mn  
(B)   Mw > Mz > Mn  > Mv 
(C)   Mn > Mw > Mv > Mz 
(D)   Mz > Mv >  Mn > Mw 
 
 
Q.3  Rubbers are a class of polymer known for 
(A)   High intermolecular forces 
(B)   High Tg polymers 
(C)   Crystalline polymers 
(D)   Low intermolecular forces  
 
 
Q.4  Nylon 6 is manufactured from 
(A)   Sebacic acid and hexamethylene diamine  
(B)   Caprolactam  
(C)   Adipic acid and hexamethylene diamine 
(D)   Caprolactone 
 
 
Q.5  Storage modulus and tan d of a polymer are experimentally measured by 
(A)  Differential scanning calorimetry 
(B)  Thermogravimetric analysis 
(C)  Thermomechanical analysis 
(D)  Dynamic mechanical thermal analysis 
 
 
Q.6  A plastic bucket is manufactured by 
(A)  Compression moulding  
(B)  Injection moulding  
(C)  Extrusion  
(D)  Blow moulding  
 
 
Q.7  The monomers, A and B with reactivity ratios rA and rB, form alternate copolymers when, 
(A)   rA = rB = 0 (B)   rA = rB = 1 (C)  rA > 1,  rB  > 1 (D)   rA < 1,  rB  < 1 
 
 
 
GATE 2018   Polymer Science & Engineering (XE – F) 
XE – F  2/6 
Q.8  The degree of polymerization of a poly(methyl methacrylate) sample having number 
average molecular weight of 1,50,000 g/mol is___________. 
(C = 12, H = 1, O = 16 g/mol). 
 
Q.9  If the heat of fusion of 100 % crystalline polyethylene is 290 mJ/mg, a sample of 
polyethylene with heat of fusion of 141 mJ/mg will have_______ % crystallinity.  
 
 
Q.10  Match the following:  
 
P. Butyl rubber 1. Metallocene polymerization 
Q. Cold SBR 2. Cationic polymerization 
R. Poly(ethylene terephthalate) 3. Redox polymerization 
S. Polypropylene 4. Condensation polymerization 
 
 
(A)  P-3; Q-1;  R-2; S-1 (B)  P-2;  Q-3; R-1; S-4 
(C)  P-4; Q-3;  R-1; S-2 (D)  P-2; Q-3;  R-4; S-1  
 
 
Q.11  Match the following: 
 
P. Polyaramid 1. Baby-feeding nipple   
Q. Polytetrafluoroethylene  2. Optical glasses 
R. Polycarbonate 3. Non-stick cookware 
S. Poly(dimethyl siloxane) 4. Bullet-proof jacket 
 
 
(A)  P-4; Q-3; R-2; S-1  
 
(B)  P-2; Q-3; R-4; S-1 
(C)  P-4; Q-1; R-2; S-3 (D)  P-3; Q-4; R-2; S-1 
 
 
Q.12  Flexible PVC tubes are used for watering. If some organic solvents are passed through this 
tube, it becomes stiff. This is due to the fact that the organic solvents 
(A) plasticize PVC and raise Tg. 
(B) remove plasticizer and raise Tg. 
(C) remove plasticizer  and lower Tg. 
(D) react with PVC and increase Tg 
 
 
Q.13  Match the following: 
 
P. Plastic egg container 1. Injection moulding 
Q. Water tank 2. Extrusion 
R. Chair 3. Rotational moulding 
S. Cable 4. Thermoforming 
 
 
(A)  P-3; Q-1; R-4; S-2 
 
(B)  P-4; Q-3; R-2; S-1 
(C)  P-2; Q-3; R-4; S-1 (D)  P-4; Q-3; R-1; S-2 
 
GATE 2018   Polymer Science & Engineering (XE – F) 
XE – F  3/6 
Q.14  Match the following: 
 
P. Flame retardant  1. 4-Methyl-2,6-di-t-butyl phenol 
Q. UV absorber 2. Azocarbonamide 
R. Blowing agent 3. Phenyl salisylate 
S. Antioxidant 4. Aluminium trihydrate 
 
(A)  P-4; Q-1; R-2; S-3 (B)  P-4; Q-3; R-2; S-1   
(C)  P-3; Q-4; R-2; S-1 (D)  P-2; Q-4; R-1; S-3 
 
 
Q.15   A plot of strain (%) versus time of a polymer is given below. Based on this plot and the 
properties as mentioned below, find out the correct combination. 
 
 
                      1 = Viscoelastic deformation; 2 = Elastic deformation 
                      3 = Viscoelastic recovery;       4 = Elastic recovery  
 
(A)   P-1; Q-4; R-2; S-3;  (B)  P-2; Q-3; R-4; S-1 
(C)   P-3; Q-1; R-2; S-4 (D)  P-2; Q-1; R-4; S-3  
 
GATE 2018   Polymer Science & Engineering (XE – F) 
XE – F  4/6 
Q.16  The plot shows apparent viscosity versus shear rate of Newtonian, Dilatent and 
Pseudoplastic fluids. Based on this plot and the fluid behaviour as mentioned below, find 
out the correct combination. 
 
                                  
 
    
 
          1 = Dilatent fluid; 2 = Newtonian fluid, 3 = Pseudoplastic fluid  
 
 
(A)     P-1; Q-2; R-3 (B)  P-3; Q-1; R-2  
(C)     P-2; Q-3; R-1 (D)  P-2; Q-3; Q-1 
Page 5


GATE 2018   Polymer Science & Engineering (XE – F) 
XE – F  1/6 
XE (F): Q. 1 – Q. 9 carry one mark each & Q. 10 – Q. 22 carry two marks each. 
Q.1  Which one of the following polymers occurs naturally?  
(A)  Bakelite (B)  Teflon (C)   Cellulose (D)  Perspex 
 
 
Q.2  The order of average molecular weights of a polymer is 
(A)   Mz > Mw > Mv > Mn  
(B)   Mw > Mz > Mn  > Mv 
(C)   Mn > Mw > Mv > Mz 
(D)   Mz > Mv >  Mn > Mw 
 
 
Q.3  Rubbers are a class of polymer known for 
(A)   High intermolecular forces 
(B)   High Tg polymers 
(C)   Crystalline polymers 
(D)   Low intermolecular forces  
 
 
Q.4  Nylon 6 is manufactured from 
(A)   Sebacic acid and hexamethylene diamine  
(B)   Caprolactam  
(C)   Adipic acid and hexamethylene diamine 
(D)   Caprolactone 
 
 
Q.5  Storage modulus and tan d of a polymer are experimentally measured by 
(A)  Differential scanning calorimetry 
(B)  Thermogravimetric analysis 
(C)  Thermomechanical analysis 
(D)  Dynamic mechanical thermal analysis 
 
 
Q.6  A plastic bucket is manufactured by 
(A)  Compression moulding  
(B)  Injection moulding  
(C)  Extrusion  
(D)  Blow moulding  
 
 
Q.7  The monomers, A and B with reactivity ratios rA and rB, form alternate copolymers when, 
(A)   rA = rB = 0 (B)   rA = rB = 1 (C)  rA > 1,  rB  > 1 (D)   rA < 1,  rB  < 1 
 
 
 
GATE 2018   Polymer Science & Engineering (XE – F) 
XE – F  2/6 
Q.8  The degree of polymerization of a poly(methyl methacrylate) sample having number 
average molecular weight of 1,50,000 g/mol is___________. 
(C = 12, H = 1, O = 16 g/mol). 
 
Q.9  If the heat of fusion of 100 % crystalline polyethylene is 290 mJ/mg, a sample of 
polyethylene with heat of fusion of 141 mJ/mg will have_______ % crystallinity.  
 
 
Q.10  Match the following:  
 
P. Butyl rubber 1. Metallocene polymerization 
Q. Cold SBR 2. Cationic polymerization 
R. Poly(ethylene terephthalate) 3. Redox polymerization 
S. Polypropylene 4. Condensation polymerization 
 
 
(A)  P-3; Q-1;  R-2; S-1 (B)  P-2;  Q-3; R-1; S-4 
(C)  P-4; Q-3;  R-1; S-2 (D)  P-2; Q-3;  R-4; S-1  
 
 
Q.11  Match the following: 
 
P. Polyaramid 1. Baby-feeding nipple   
Q. Polytetrafluoroethylene  2. Optical glasses 
R. Polycarbonate 3. Non-stick cookware 
S. Poly(dimethyl siloxane) 4. Bullet-proof jacket 
 
 
(A)  P-4; Q-3; R-2; S-1  
 
(B)  P-2; Q-3; R-4; S-1 
(C)  P-4; Q-1; R-2; S-3 (D)  P-3; Q-4; R-2; S-1 
 
 
Q.12  Flexible PVC tubes are used for watering. If some organic solvents are passed through this 
tube, it becomes stiff. This is due to the fact that the organic solvents 
(A) plasticize PVC and raise Tg. 
(B) remove plasticizer and raise Tg. 
(C) remove plasticizer  and lower Tg. 
(D) react with PVC and increase Tg 
 
 
Q.13  Match the following: 
 
P. Plastic egg container 1. Injection moulding 
Q. Water tank 2. Extrusion 
R. Chair 3. Rotational moulding 
S. Cable 4. Thermoforming 
 
 
(A)  P-3; Q-1; R-4; S-2 
 
(B)  P-4; Q-3; R-2; S-1 
(C)  P-2; Q-3; R-4; S-1 (D)  P-4; Q-3; R-1; S-2 
 
GATE 2018   Polymer Science & Engineering (XE – F) 
XE – F  3/6 
Q.14  Match the following: 
 
P. Flame retardant  1. 4-Methyl-2,6-di-t-butyl phenol 
Q. UV absorber 2. Azocarbonamide 
R. Blowing agent 3. Phenyl salisylate 
S. Antioxidant 4. Aluminium trihydrate 
 
(A)  P-4; Q-1; R-2; S-3 (B)  P-4; Q-3; R-2; S-1   
(C)  P-3; Q-4; R-2; S-1 (D)  P-2; Q-4; R-1; S-3 
 
 
Q.15   A plot of strain (%) versus time of a polymer is given below. Based on this plot and the 
properties as mentioned below, find out the correct combination. 
 
 
                      1 = Viscoelastic deformation; 2 = Elastic deformation 
                      3 = Viscoelastic recovery;       4 = Elastic recovery  
 
(A)   P-1; Q-4; R-2; S-3;  (B)  P-2; Q-3; R-4; S-1 
(C)   P-3; Q-1; R-2; S-4 (D)  P-2; Q-1; R-4; S-3  
 
GATE 2018   Polymer Science & Engineering (XE – F) 
XE – F  4/6 
Q.16  The plot shows apparent viscosity versus shear rate of Newtonian, Dilatent and 
Pseudoplastic fluids. Based on this plot and the fluid behaviour as mentioned below, find 
out the correct combination. 
 
                                  
 
    
 
          1 = Dilatent fluid; 2 = Newtonian fluid, 3 = Pseudoplastic fluid  
 
 
(A)     P-1; Q-2; R-3 (B)  P-3; Q-1; R-2  
(C)     P-2; Q-3; R-1 (D)  P-2; Q-3; Q-1 
GATE 2018   Polymer Science & Engineering (XE – F) 
XE – F  5/6 
Q.17  Plot of the modulus versus temperature of different types of polymers is given below. 
Based on this plot and the nature of the polymers as mentioned below, find out the correct 
combination. 
 
 
 
1 = An amorphous polymer of high molecular weight having entanglements  
2 = An amorphous polymer of moderate molecular weight 
3 = Highly crosslinked polymer  
4 = Semi-crystalline polymer 
 
(A)  P-2; Q-1; R-3; S-4  (B)  P-1; Q-2; R-3; S-4  
(C)  P-2; Q-1; R-4; S-3  (D)  P-1; Q-3; R-4; S-2  
 
 
 
 
Q.18  The Tg of homopolymers of A and B are +100 
o
C and  -70 
o
C respectively. The Tg of a 
random copolymer of A and B having 40 wt% A and 60 wt% B is _________
o
C.  
 
 
Q.19  The number average molecular weight of a polymer prepared from HO(CH2)14COOH  is 
24,000 g/mol. The conversion of the monomer required to reach the above molecular 
weight is__________%. (C = 12, H = 1, O = 16 g/mol).  
 
 
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