Bissoy.com
Doctors Medicines MCQs Q&A

What are the sequence of steps involved in the manufacture of carbon fibre?

What are the sequence of steps involved in the manufacture of carbon fibre? Correct Answer Heating-Carbonization-Graphitization

The PAN fibres are first preheated to 300°C and the undergoes carbonization at 1600°C till a high strength carbon fibre is formed. Finally, it undergoes graphitization at temperature up to 3000°C.

Related Questions

Low quality of jute fibre is attributed to
1. Discoloration of fibre
2. Very short fibre strands
3. Reduction of cellulose in fibre
4. Reduction of cell wall strength over-retting decreases the fibre quality due to
Select the correct answer:
Consider the following statements.
1. Fibre optics is based on the principle of total internal reflection.
2. In an optical fibre communication system, power consumption is extremely low
3. Optical fibre communications are free from radio frequency interference.
4. In India, Reliance Group of Industries is engaged in the manufacture of the optical fibre.
Which of these statements are correct?
A, B and C participated in a race. A covers the same distance in 49 steps as B covers in 50 steps and C covers in 51 steps. A takes 10 steps in same time as B takes 9 steps and C takes 8 steps. Who is the winner of the race?
A man walks 60 steps in a minute when he has energy. He walks 30 steps per minute when he is tired. He has to go to a place 300 steps away. If he can walk 120 steps without getting tired, what is his average walking speed (steps per minute) for his back and forth journey if he takes rest after reaching the place and again walks 120 steps with energy.
Three cats are roaming in a zoo n such a way that when cat A takes 5 steps, B takes 6 steps and C takes 7 steps.But the 6 steps of A are equal to the 7 steps of B and 8 steps of C. what is the ratio of their speeds?
Which one of the following statement is/are incorrect with respect to fibre intake in animals? 1. Forage dry matter consumption should be near 2% of the body weight. 2. At least 21-25% acid detergent fibre should be in the total ration. 3. At least 28-30% neutral detergent fibre should be in the total ration. 4. Provide at least 3 Kg of fibre a day.
A glass fibre reinforced epoxy composite is made with 60 wt.% unidirectional continuous glass fibres. The elastic moduli of the glass fibre and the epoxy matrix are 72.5 and 2.4 GPa, respectively. What is the elastic modulus of this composite along the fibre direction, in GPa? The densities of glass fibre and epoxy are 2.58 g/cm3 and 1.14 g/cm3, respectively
Some students were not involved in the strike. If the above statement is true, which of the following conclusions is/are logically necessary? 1. Some who were involved in the strike were students. 2. No student was involved in the strike. 3. At least one student was involved in the strike. 4. Some who were not involved in the strike were students.
What does the term ‘carbon count’ means? 1. A measure of the amount of carbon dioxide you produce through your lifestyle every day. 2. A measure of the amount of carbon present on Earth. 3. A measure of the amount of carbon and carbon dioxide on Earth. Select the correct answer using the code given below.
Mr. Ali decided to walk down the escalator of a tube station. He found that if he walks down 26 steps, he requires 30 seconds to reach the bottom. However, if he steps down 34 stairs he would only require 18 seconds to get to the bottom. If the time is measured from the moment the top step begins to descend to the time he steps off the last step at the bottom, find out the height of the stair way in steps?