CIVE 2700 Quiz 2 (Lec 9 - 16)

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CIVE 2700 Quiz 2 (Lec 9 - 16) Seasoning is the process of ... - ✔✔drying timber to equivalent moisture content (EMC) What are the three corrosion resistant types of steel according to CSA classi ... fication? - ✔✔Types R, A, AT A measure of energy absorbed during the fracture of a specimen of standard dimensions and geometry when subjected to very rapid (impact) loading. Charpy impact tests are used to measure this parameter, which is important in assessing the ductile-to-brittle transition behaviour of a material - ✔✔Impact Energy The basic structural unit of a crystal structure. It is generally defined in terms of atom (or ion) positions within a parallelepiped volume. - ✔✔Unit Cell A linear crystalline defect associated with the lattice distortion produced in the vicinity of the end of an half-plane of atoms within a crystal. - ✔✔Edge dislocation Loose knots in timber can... - ✔✔decrease strength and stiffness of lumber The valence electrons are the electrons in the nearest shell to a nucleus of an atom. True or False? - ✔✔False. The valence electrons are the electrons of the outer shell of the atom. What are the charges of Blast Furnace in steel production? - ✔✔Iron ore, coke, and limestone FCC (Face Centred Cubic) structure has 1 whole atom in the centre of the unit cell. True or False. - ✔✔False BCC (Body centred cubic) structure has 1 whole atom in the centre of the unit cell. FCC has an atom at each corner and at each face of the unit cell. steel shear stirrups with the bent ends will be used in a beams of concrete structure in Manitoba where the temperature can be as low as -40. What are the mechanical test have to be performed on the rebars' martial to evaluate the suitability of the material for the specified application? Choose three tests that are required and explain. - ✔✔Bend Test - to determine whether the material will suffer from cracking due to bending and deformation under tensile stresses Tensile test - to determine the yield and ultimate strength and find modulus of elasticity Charpy Test - to determine the behaviour of material at cold temperature and whether or not material show a ductile to brittle failure transition An engineered lumber product manufactured by bonding thin veneers assembled with grain parallel is called - ✔✔laminated veneer lumber Having identical values of a property in all directions - ✔✔Isotropic Softwood comes from what type of trees - ✔✔Softwood comes from coniferous trees In pig iron production, the role of carbon monoxide is to reduce the iron oxide into iron and carbon dioxide. True or False? - ✔✔True. How does the corrosion of steel rebars affect concrete - ✔✔It reduces the strength and durability of reinforced concrete The symbol states that welds should be... Symbol description: Arrow points to left. Triangle is above arrow line, not below. On left of triangle it states 1/4. On right of triangle (closer to arrow head) it states 2-4. - ✔✔1/4 inch welds that are 2 inches long and have 4 inch spacing . Anisotropic materials are the materials with - ✔✔different properties along the different directions A steel alloy that is highly resistant to corrosion in a variety of environments. The predominant alloying element is chromium, which must be present in a concentration of at least 11 wt%. - ✔✔Stainless Steel Ferritic stainless steel can be used in construction of MRI centre in a hospital. MRI facilities has to be constructed from non-magnetic materials. - ✔✔False. Heartwood is the - ✔✔inner part of a tree trunk which gives structural support to a tree Conventional Carbon Steel - ✔✔Reinforcing interior beams of a school building Stainless steel - ✔✔Fire protective layers over the concrete lining of tunnels Aluminum - ✔✔Electric transmission tower in remote areas [Show More]

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