AFCAT Exam - AFCAT Quiz 13

Direction: Read the given passage carefully and answer the questions that follow.

Scrap rubbers such as worn-out vehicle tyres contribute to environmental pollution, and there is an urgent need for safely repurposing them. It is estimated that nearly one billion scrap tyres are discarded annually. Incinerating them emits potent greenhouse gases, while pyrolysing them leaves carbon black and different hydrocarbon oils without rubber residue. The few recycling processes are elaborate and expensive with little value addition to rubber. Devulcanisation of rubber is a better way of repurposing used rubber. The few conventional methods to devulcanize rubber material are prone to toxic emissions and yield a very low degree of devulcanization in the end.

_____(I)_______. The process not only reclaims a high amount of rubber but also is of superior quality which can be repurposed into other products including making new tyres. Formed by adding a specific devulcanizing agent, the reclaimed material was assessed chemically, morphologically and mechanically. The material exhibited good mechanical properties, tear strength, abrasion resistance, and dynamic mechanical properties with comparable toughness and composition to fresh rubber.
This rubber can be used in making products like automobile floor mats, soft tiles, boots and sheets. Also, by mixing the devulcanized rubber with fresh rubber, compounding agents and silica, it can once again be vulcanised into new tyres, saving precious amounts of raw material and industrial costs.

Direction: Read the given passage carefully and answer the questions that follow.

Scrap rubbers such as worn-out vehicle tyres contribute to environmental pollution, and there is an urgent need for safely repurposing them. It is estimated that nearly one billion scrap tyres are discarded annually. Incinerating them emits potent greenhouse gases, while pyrolysing them leaves carbon black and different hydrocarbon oils without rubber residue. The few recycling processes are elaborate and expensive with little value addition to rubber. Devulcanisation of rubber is a better way of repurposing used rubber. The few conventional methods to devulcanize rubber material are prone to toxic emissions and yield a very low degree of devulcanization in the end.

_____(I)_______. The process not only reclaims a high amount of rubber but also is of superior quality which can be repurposed into other products including making new tyres. Formed by adding a specific devulcanizing agent, the reclaimed material was assessed chemically, morphologically and mechanically. The material exhibited good mechanical properties, tear strength, abrasion resistance, and dynamic mechanical properties with comparable toughness and composition to fresh rubber.
This rubber can be used in making products like automobile floor mats, soft tiles, boots and sheets. Also, by mixing the devulcanized rubber with fresh rubber, compounding agents and silica, it can once again be vulcanised into new tyres, saving precious amounts of raw material and industrial costs.

Direction: Read the given passage carefully and answer the questions that follow.

Scrap rubbers such as worn-out vehicle tyres contribute to environmental pollution, and there is an urgent need for safely repurposing them. It is estimated that nearly one billion scrap tyres are discarded annually. Incinerating them emits potent greenhouse gases, while pyrolysing them leaves carbon black and different hydrocarbon oils without rubber residue. The few recycling processes are elaborate and expensive with little value addition to rubber. Devulcanisation of rubber is a better way of repurposing used rubber. The few conventional methods to devulcanize rubber material are prone to toxic emissions and yield a very low degree of devulcanization in the end.

_____(I)_______. The process not only reclaims a high amount of rubber but also is of superior quality which can be repurposed into other products including making new tyres. Formed by adding a specific devulcanizing agent, the reclaimed material was assessed chemically, morphologically and mechanically. The material exhibited good mechanical properties, tear strength, abrasion resistance, and dynamic mechanical properties with comparable toughness and composition to fresh rubber.
This rubber can be used in making products like automobile floor mats, soft tiles, boots and sheets. Also, by mixing the devulcanized rubber with fresh rubber, compounding agents and silica, it can once again be vulcanised into new tyres, saving precious amounts of raw material and industrial costs.

In the following question, out of the five alternatives, select the word similar in meaning to the given word.

Direction: In each question, a sentence with four words printed in bold is given. These are numbered as (1), (2), (3) and (4). One of these four words printed in bold may either be misspelt or inappropriate in the context of the sentence. Find out the word which is wrongly spelt or inappropriate, if any. The number of that word is your answer. If all the words printed in bold are correctly spelt and also appropriate in the context of the sentence, mark (5), i.e., ‘All are correct’, as your answer.

Direction: A sentence with two blanks is given, each blank indicating that something has been omitted. Choose the words that best fit in the given blanks making the sentence grammatically correct and meaningful.