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- a 36.| OMANTEL Expert Q&A ix- The abrasion value is the highest in: a) Flakey aggregates b) Angular aggregates c) Rounded aggregates d) Elongated aggregates x- The higher tensile strength of the timber sobtained when the load is applied: a) Normal to grains b) Parallel to grains c) Making angle of 45° with grains d) None of them xi- If the steel ultimate strength is 352 MPa, therefore the yield strength can be estimated as: a) 3.52 MPa b) 252 MPa c) 32 MPa d) 635 MPa xii- The aggregate abrasion value is obtained when the loss of 1560 gm happened using the weight of aggregates of: a) 50 Kg b) 5 Kg c) 0.5 Kg d) 6 KgThe standard unit measurement for solid lumber is _____.The state at which bound water in wood is at maximum known as O a. hysteresis O b. EMC O C. O d. MC fiber saturation point
- (d)Mass engineered-wood products like Glulam, LVL, and CLT are wet service condition applications. ( permissible inLaminated wood is sometimes used in the construction of highly stressed aircraftcomponents. This wood can be identified by its A. parallel grain construction. B. similarity to standard plywood construction. C. perpendicular grain construction.Determine the following if it is true or false The wood grains on bending test is subjected to tension alone Wood knots do not affect the strength of wood Metal furnace by-product like slags are used as alternative aggregates
- What is the size factor for bending of 4x10 dimension lumber?CF=_______State five different imperfections that may be found in lumber, and brieflydefine them.if the stress at failure and bending is 7200 PSI for small, perfect samples of a certain species of wood, what is the allowable bending stress for a piece of lumber with defects that are judged to reduce the strength by 40%?
- Question 30 The degradation of wood due to cyclic loading is referred to as O a. creep b. Burgers model O c. fatigueA beam will support a combination of dead, live, and earthquake loads. The Load Duration Factor for Dead is 0.9, Live is 1.0, and Earthquake is 1.6. The Dead load causes a stress of 300 psi, the live load causes a stress of 200 psi, and the earthquake causes a stress of 100 psi. The tabulated strength of the wood is 1000 psi. What is the critical (largest) Demand/Capacity ratio for the beam? (Demand/Capacity is fb/Fb'.)Problem 1: a) Explain the main differences in the steel yielding strength? b) What is the carbon effect on the steel properties? c) Mention the different cases of the rust on the steel members? d) Explain the different fire protection methods for the steel members and where is the adequate use of each method?