16. Usually stronger constituent of a composite is A) Matrix B) Reinforcement C) Both are of equal strength D) Cannot define 17. Usually softer constituent of a composite is A) Matrix B) Reinforcement C) Both are of equal strength D) Cannot define 18. Mechanical properties of fiber-reinforced composites depend on A) Properties of constituents B) Interface strength C) Fiber length, orientation, and volume fraction D) All the above 19. Last constituent to fail in FRP composites A) Matrix B) Fiber C) Both fail at same time D) Cannot define 20. In Tensile Testing of Metallic Materials, what tensile property was NOT determined? A) Modulus of elasticity B) Ultimate strength C) Strain D) Stress E) Poisson's ratio 21. The short beam shear test involves a three-point flexure specimen with the span-to- ratio. 22. True or False? There is a minimum thickness required for a short beam shear test. 23. The area under the linear region of a stress-strain curve is known as the 24. The acronym ASTM stands for A) Association of Standard Tensile Materials B) American Society for Testing and Materials C) Alliance for Standard Testing of Materials D) None of the above 25. The SEM uses for imaging. A) Electrons B) Lightwaves C) Filtration D) None of the above 26. Choose all that apply: The basic components of a SEM are Please answer 16-30 A) Lens system B) Imaging system C) Desiccator D) Vacuum system 27. True or False? During compression molding, the mold is kept under constant pressure while heat is applied until the molding material has cured. 28. In Flexure Test of FRP Composite Materials, a bending test was conducted. 29. True or False? region. Both load and stress are same thing 30. Disadvantages of the scanning electron microscope include A) High operational and maintenance costs B) Vacuum atmosphere unsuitable for some specimens C) Difficulty in preparing certain specimens D) All the above