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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
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?
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:
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.
______________ is used as a blending agent with epoxy resin to increase its glass transition temperature, modulus and tensile strength of epoxy resin.
Identify a similarity between electron optics and light optics.
In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of thefour alternatives. Widespread liberalization of the economic ________________ regime was long overdue in 1991, and has played a positive role since, but itsimpact has ________________ its course and the policy has recognisable ___________________. Liberalization cannot address all aspects ofthe man­made environment and now climate change ________________ to change everything forever. We do not have another quarter centuryto deal ___________ these imperatives. Widespread liberalization of the economic ________________ regime
In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of thefour alternatives. Widespread liberalization of the economic ________________ regime was long overdue in 1991, and has played a positive role since, but itsimpact has ________________ its course and the policy has recognisable ___________________. Liberalization cannot address all aspects ofthe man­made environment and now climate change ________________ to change everything forever. We do not have another quarter centuryto deal ___________ these imperatives. but its impact has ________________ its course
In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of thefour alternatives. Widespread liberalization of the economic ________________ regime was long overdue in 1991, and has played a positive role since, but itsimpact has ________________ its course and the policy has recognisable ___________________. Liberalization cannot address all aspects ofthe man­made environment and now climate change ________________ to change everything forever. We do not have another quarter centuryto deal ___________ these imperatives. now climate change ________________ to change everything forever.
Which of the following materials is/are used as matrix in fibre reinforced plastics? I. E-Glass II. Epoxy III. Kevlar 49