Table 2. Mechanical properties of fabricated sambles Which of the following statements is true about the polyester/CF composites shown abo modulus increases at 0.5CF and then decreases optimum modulus and impact strength performance is observed at the same CF loading pure polymer has higher strength than filled polymers impact strength decreases with fiber loading Table 2. Mechanical properties of fabricated sambles Which of the following statements is true about the polyester/CF composites shown abo modulus increases at 0.5CF and then decreases optimum modulus and impact strength performance is observed at the same CF loading pure polymer has higher strength than filled polymers impact strength decreases with fiber loading