Compounding Ingredients and Mixing - Additives, Compounding and Formulations - Engineering Sciences Previous Year Questions

1

2008 · Engineering Sciences · Additives, Compounding and Formulations · Compounding Ingredients and Mixing

Engineering Sciences (XE) 2008

Match the additives listed in Group I below with their function listed in Group II and select the right answer from (A), (B), (C) or (D).
Group I (additives)                                                                                    Group II (function)
P. Sulfur                                                                                         1. Age resistor
Q. Zinc oxide                                                                                         2. Accelerator activator
R. Paraphenylene diamine                                                      3. Vulcanizing agent
S. Dioctyl phthalate                                                                    4. Plasticizer
                                                                                                                    5. Accelerator

A

P-1, Q-3, R-4, S-5

B

P-3, Q-2, R-1, S-4

C

P-3, Q-1, R-5, S-4

D

P-2, Q-4, R-5, S-1

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2

2008 · Engineering Sciences · Additives, Compounding and Formulations · Compounding Ingredients and Mixing

Engineering Sciences (XE) 2008

Match the ingredients in Group I with their amount in parts by weight in Group II in a typical recipe and select the right answer from (A), (B), (C) or (D).
Group I (ingredients)                                                                          Group II (parts by weight)
P. Polyvinylchloride                                                                      1. 0.5
Q. Plasticizer                                                                                      2. 40
R. Stabilizer                                                                                      3. 3
S. Calcium stearate                                                                          4. 100

A

P-1, Q-2, R-3, S-4

B

P-4, Q-3, R-2, S-1

C

P-2, Q-3, R-1, S-4

D

P-4, Q-2, R-3, S-1

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3

2009 · Engineering Sciences · Additives, Compounding and Formulations · Compounding Ingredients and Mixing

Engineering Sciences (XE) 2009

The correct structure of synthetic antioxidant BHT (butylated hydroxy toluene) is

A

B

C

D

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4

2009 · Engineering Sciences · Additives, Compounding and Formulations · Compounding Ingredients and Mixing

Engineering Sciences (XE) 2009

Match the rubber ingredients with their appropriate function.

A

P. ZnO - 1. tackifier

B

Q. salicylic acid - 2. extender

C

R. ester gum - 3. accelerator

D

S. paraffin oil - 4. retarder

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5

2009 · Engineering Sciences · Additives, Compounding and Formulations · Compounding Ingredients and Mixing

Engineering Sciences (XE) 2009

Match the additive to its most common function.

A

P. talc - 1. plasticizer

B

Q. carbon fibre - 2. flame retardant

C

R. dioctyl phthalate - 3. filler

D

S. antimony trioxide - 4. reinforcement

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6

2010 · Engineering Sciences · Additives, Compounding and Formulations · Compounding Ingredients and Mixing

Engineering Sciences (XE) 2010

Which one of the following reagents is used to prevent coagulation of natural rubber latex?

A

Ammonia

B

Acetic acid

C

Tolyl mercaptan

D

Sodium chloride

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7

2010 · Engineering Sciences · Additives, Compounding and Formulations · Compounding Ingredients and Mixing

Engineering Sciences (XE) 2010

A rubber compound is made by mixing functional additives with the rubber using

A

Two-roll mill

B

Compression molding machine

C

Three-roll calender

D

Thermoforming machine

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8

2011 · Engineering Sciences · Additives, Compounding and Formulations · Compounding Ingredients and Mixing

Engineering Sciences (XE) 2011

Match the following additives for plastic with their respective functions.

A

P-1, Q-2, R-3, S-4

B

P-3, Q-4, R-2, S-1

C

P-3, Q-2, R-1, S-4

D

P-4, Q-3, R-2, S-1

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9

2012 · Engineering Sciences · Additives, Compounding and Formulations · Compounding Ingredients and Mixing

Engineering Sciences (XE) 2012

Match the following compounding ingredients in plastic technology with their respective functions:

Compounding ingredients	Functions
P. Tricresyl phosphate	1. Filler
Q. Calcium carbonate	2. UV stabilizer
R. Azodicarbonamide	3. Plasticizer
S. o-Hydroxybenzophenone	4. Blowing agent

A

P-3, Q-1, R-4, S-2

B

P-1, Q-4, R-3, S-2

C

P-4, Q-1, R-2, S-3

D

P-3, Q-4, R-1, S-2

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10

2013 · Engineering Sciences · Additives, Compounding and Formulations · Compounding Ingredients and Mixing

Engineering Sciences (XE) 2013

A hindered phenol is added to a polyolefin

A

to increase ozone resistance

B

to increase foamability

C

to increase oxidation resistance

D

to increase crosslinkability

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11

2013 · Engineering Sciences · Additives, Compounding and Formulations · Compounding Ingredients and Mixing

Engineering Sciences (XE) 2013

Match each of the following additives for plastics with its function

Additive	Function
P. α-Cellulose	1. Flame retarder
Q. Zinc chromate	2. Plasticizer extender
R. Alumina trihydrate	3. Organic fibrous filler
S. Chlorinated paraffin wax	4. Colorant

A

P-1; Q-2; R-3; S-4

B

P-2; Q-3; R-4; S-1

C

P-3; Q-4; R-1; S-2

D

P-4; Q-1; R-2; S-3

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12

2014 · Engineering Sciences · Additives, Compounding and Formulations · Compounding Ingredients and Mixing

Engineering Sciences (XE) 2014

In natural rubber compounding, a peptizer is added

A

at the beginning of the compounding cycle

B

after the addition of filler

C

at the end of the compounding cycle

D

after the addition of antioxidant

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13

2014 · Engineering Sciences · Additives, Compounding and Formulations · Compounding Ingredients and Mixing

Engineering Sciences (XE) 2014

Match the following additives for plastics with their respective functions:

A

P. dilaurylthiodipropionate - 1. solid layer lubricant; Q. graphite - 2. flame retardant; R. antimony trioxide - 3. reinforcement; S. carbon fibre - 4. antioxidant

B

P. dilaurylthiodipropionate - 4. antioxidant; Q. graphite - 1. solid layer lubricant; R. antimony trioxide - 2. flame retardant; S. carbon fibre - 3. reinforcement

C

P. dilaurylthiodipropionate - 4. antioxidant; Q. graphite - 2. flame retardant; R. antimony trioxide - 3. reinforcement; S. carbon fibre - 1. solid layer lubricant

D

P. dilaurylthiodipropionate - 3. reinforcement; Q. graphite - 4. antioxidant; R. antimony trioxide - 2. flame retardant; S. carbon fibre - 1. solid layer lubricant

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14

2015 · Engineering Sciences · Additives, Compounding and Formulations · Compounding Ingredients and Mixing

Engineering Sciences (XE) 2015

Choose the appropriate word/phrase, out of the four options given below, to complete the following sentence.
Frogs ____________________.

A

croak

B

roar

C

hiss

D

patter

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15

2015 · Engineering Sciences · Additives, Compounding and Formulations · Compounding Ingredients and Mixing

Engineering Sciences (XE) 2015

Match the following plastic additives with their function

Additive	Function
P. Di-isoocytl phthalate	1. Antioxidant
Q. 4-Methyl-2,6-t-butylphenol	2. Plasticizer
R. Dicumyl peroxide	3. Antistatic agent
S. Quaternary ammonium compound	4. Cross-linking agent

A

P-2; Q-4; R-1; S-3

B

P-4; Q-1; R-3; S-2

C

P-2; Q-1; R-4; S-3

D

P-3; Q-1; R-4; S-2

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16

2016 · Engineering Sciences · Additives, Compounding and Formulations · Compounding Ingredients and Mixing

Engineering Sciences (XE) 2016

Match the following polymer additives to their function:

A

P: Azocarbonamide – 1. Chemical plasticizer; Q: Antimony trioxide – 2. Accelerator; R: Pentachlorothiophenol – 3. Flame retardant; S: Mercaptobenzothiazole – 4. Blowing agent

B

P: Azocarbonamide – 1. Chemical plasticizer; Q: Antimony trioxide – 2. Accelerator; R: Pentachlorothiophenol – 3. Flame retardant; S: Mercaptobenzothiazole – 4. Blowing agent

C

P: Azocarbonamide – 1. Chemical plasticizer; Q: Antimony trioxide – 2. Accelerator; R: Pentachlorothiophenol – 3. Flame retardant; S: Mercaptobenzothiazole – 4. Blowing agent

D

P: Azocarbonamide – 1. Chemical plasticizer; Q: Antimony trioxide – 2. Accelerator; R: Pentachlorothiophenol – 3. Flame retardant; S: Mercaptobenzothiazole – 4. Blowing agent

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17

2017 · Engineering Sciences · Additives, Compounding and Formulations · Compounding Ingredients and Mixing

Engineering Sciences (XE) 2017

The filler which would impart electrical conductivity to a polymer is

A

Carbon black

B

Talc

C

Glass beads

D

Calcium carbonate

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18

2017 · Engineering Sciences · Additives, Compounding and Formulations · Compounding Ingredients and Mixing

Engineering Sciences (XE) 2017

Match the following rubber additives to their function:

A

P-3; Q-1; R-2; S-4

B

P-3; Q-1; R-4; S-2

C

P-3; Q-4; R-2; S-1

D

P-3; Q-4; R-1; S-2

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19

2018 · Engineering Sciences · Additives, Compounding and Formulations · Compounding Ingredients and Mixing

Engineering Sciences (XE) 2018

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 T_g

B

remove plasticizer and raise T_g

C

remove plasticizer and lower T_g

D

react with PVC and increase T_g

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20

2019 · Engineering Sciences · Additives, Compounding and Formulations · Compounding Ingredients and Mixing

Engineering Sciences (XE) 2019

Match the following rubber additives to their function:

Additive	Function
P. Tetramethyl thiuram disulfide	1. Peptizer
Q. Xylyl mercaptan	2. Antiozonant
R. Sulfur	3. Accelerator
S. Microcrystalline wax	4. Cross-linking agent

A

P-4, Q-1, R-3, S-2

B

P-3, Q-1, R-4, S-2

C

P-3, Q-2, R-4, S-1

D

P-4, Q-2, R-3, S-1

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