Materials FE Civil Exam Questions With Well Elaborated Answers.

What are the five major elements of a concrete mix? - correct answer Cement, Water, Coarse Aggregate, Fine Aggregate, Air, Extraneous Admixtures The concrete slump represents what properties of a concrete mix? - correct answer Flowability/Workability When the water to cement ratio is reduced, which mechanical properties of concrete are increased? - correct answer Strength and Durability When the water to cement ratio is reduced, which mechanical properties of concrete are decreased? - correct answer Workability When the water to cement ratio is reduced, what is a solution to increase the workability of the mix? - correct answer Add Water Reducer to the mix What pozzolanic materials can be added to a concrete mix? - correct answer Fly Ash, Silica Fumes, Slag What are the benefits of adding pozzolanic materials to a mix? - correct answer Its more ecological and Economical, slows down the curing mechanism and provides enhanced properties to the concrete What Chemical Admixtures can be added to a concrete mix composition? - correct answer Water Reducers, Air-Entrained Admixtures What effect do water reducers have on Concrete Mixes? - correct answer Allows you to maintain a constant water/cement ratio for a smaller cement ratio without compromising the strength and increasing workability What effect do air-entrained admixtures have on concrete mixes? - correct answer Increase Durability and workability of a concrete mix How does having more coarse aggregate impact workability? Strength? - correct answer Increases, Decreases How does having more fine aggregate impact workability? Strength? - correct answer Decreases, Increases What are the types of Asphalt Mix Design? - correct answer Hot Mix Asphalt (HMA) Cold Mix Asphalt (CMA) Foamed Asphalt Chip Seal Asphalt Warm Mix Asphalt (WMA) Porous Asphalt Quiet Asphalt What material is the slump test used for? - correct answer Concrete What does the slump test determine? - correct answer Workability What is the most common quality test of concrete? - correct answer Compressive Strength Test What does the water permeability test of concrete determine? - correct answer Durability The ASTM D6084 test measures what asphalt property? - correct answer Elastic Recovery The ASTM D36 test measures what asphalt property? - correct answer Softening Point of Asphalt The ASTM D5329 and ASTM D6690 test measures what asphalt property? - correct answer Sealant and Filler Tests ASTM D143 is the standard test method for _____ clear specimens of Timber - correct answer Small ASTM E8 is the standard test method for ________ testing of metallic metals - correct answer Tensile Capacity ASTM C127 is the standard test method for relative density (specific gravity) and ______ of coarse aggregate. - correct answer Absorption and Moisture Content ASTM C128 is the standard test method for Absorption and ______ of fine aggregate. - correct answer Moisture Content ASTM C29 determines _____ Density ("Unit Weight") and voids in aggregate - correct answer Bulk Density ASTM C136 determines the particle size distribution through - correct answer sieve analysis ASTM D198 is the standard test method of static bending tests of lumber in _______ sizes - correct answer lumber T/F Wood is an inorganic solid. - correct answer False Rank the following terms from lowest modulus of elasticity to highest: Concrete Wood Steel Aluminum - correct answer Wood, Concrete, Aluminum, Steel What is creep? - correct answer Long-term deformation under a constant load T/F Wood, Concrete, Metals, and Asphalt are susceptible to creep - correct answer True T/F wood has mechanical properties in between that of steel and concrete - correct answer True T/F wood does not experience severe creep - correct answer False T/F wood is not very sensitive to moisture content and grain direction - correct answer False T/F wood is innately sustainable - correct answer True What effect does carbon have on steel? - correct answer Increases strength, decreases ductility A36 steel has a yield strength of? - correct answer 36 ksi T/F asphalt is more ductile than concrete - correct answer True Adding more fine aggregate to concrete increases its Strength, while adding more coarse aggregate increases ____________ and porosity. - correct answer workability What is the specific gravity of wood? - correct answer 1.5 What is the specific gravity of concrete? - correct answer 2.64 What is the specific gravity of steel? - correct answer 7.82