COSC 354 Final Exam with verified Answers 2025

What material does the ironworker typically use during steel erection to temporarily hold the steel in-place until bolts can be installed? - Correct Ans-Drift Pins In a two-way floor/roof system, the heavy reinforcement that is designed to carry the higher bending forces encountered in the zones of the slab that cross the columns is called what? In class, it was described as a "Grade beam within the depth of the slab". - Correct Ans-Column Strip In a two-way flat slab, the mushroom capital or the drop panels are built to resist what in the structure? - Correct Ans-High Shear Forces at the top of the column How does weathering steel differ from conventional carbon steel in construction? - Correct Ans-Its unique composition allows it to develop a protective layer of rust, which eliminates the need for painting and provides enhanced corrosion resistance over time When performing a weld, air needs to be kept out of the weld to keep from rapid oxidation. This is mostly commonly resolved by: - Correct Ans-Gaseous Shield Similar to a one-way joist system, this type of one-way floor system allows for longer span joists because of a thickened slab section: - Correct Ans-Skip-Joist System What distinguishes ferrous metals based on their carbon content? - Correct Ans-Their carbon content predominantly determines their mechanical properties, such as strength and hardness A flag at the tangent of the reference line and arrow means____________ - Correct Ans-Field Weld A circle at the tangent of the arrow and the reference line means welding to be: - Correct Ans-Correct answer: All Around While elevated concrete is curing these temporary props are installed to relieve the loads until the concrete has met its desired strength: - Correct Ans-Reshoring As discussed in class, at what temperature does steel rapidly lose its yield strength? - Correct Ans-500-600 degrees When making column splices on multi-story buildings, where is the splice usually made? - Correct Ans-Wait Height Above the Floor COSC 354 COSC 354 When discussing the ways to stabilize a building horizontally from lateral forces, i.e wind, the method that uses solid walls of concrete, or concrete masonry is called: - Correct Ans-Shear Walls When a beam connection needs to be made to a girder, and the top side of the steel members need to be the same height, what is it called when the flange of the beam is cut? - Correct Ans-Coped Beam What structural steel member did the Wide Flange Beam replace because it is much more structural efficient? Also known as the I-beam. - Correct Ans-American Standard Beam These type of bolts are typically used as a temporary means of steel installation. These are also used in light framing scenarios: - Correct Ans-Carbon Steel Bolts Before steel goes through the rolling mills, the steel is fabricated into standard shapes that are typically thick approximations of their final shape. What is the steel called at this step? - Correct Ans-Beam Blanks What is true about using Insulated Concrete Forms (ICFs) in construction projects? - Correct Ans-Include enhanced energy efficiency, superior sound insulation, increased strength and durability, and accelerated construction timelines When discussing the role of the fabricator, it was discussed that the fabricator does what: - Correct Ans-Correct answer: Shares responsibility for the design of the steel connections What is true about castellated beams? - Correct Ans-Castellated beams increase the structural efficiency because the depth of the beam is increased by 1.5 times without increasing the weight What is the primary purpose of cold worked steel in construction? - Correct Ans-Correct answer: To increase the strength and hardness of steel components What type of weld is commonly utilized for attaching steel decking to structural steel members in construction? - Correct Ans-Puddle Welds When the weld symbol is placed below the reference line, it shows that a weld is needed only on the ____________ side of the joint. - Correct Ans-Arrow As discussed in class, what structure was built completely out of wrought iron? - Correct Ans-Eiffel Tower COSC 354 COSC 354 When discussing the types of tensioning methods used for bolts - what type is used when a bolt is tightened snug, then turned an additional fraction of a turn? - Correct Ans-Turn-of-Nut Method The type of steel includes the addition of nickel and chromium: - Correct Ans-Stainless Steel Which weld symbol indicates a Fillet weld? - Correct Ans-Triangle Which is not a pro of a slab-on-grade? - Correct Ans-Can be used in clay-rich soils A two-way joist slab uses domes to form the rib-like structure. What does a one-way concrete joist system use to form the panels? - Correct Ans-Pans When connecting a beam to the web of a column, what is the reason the shear plate connecting bolts would be outside the flange of the column? - Correct Ans-Ease of access In this type of bolting method, the end of the bolts physically breaks off when the bolt is fully tensioned: - Correct Ans-Tension-Control Bolts What characteristic distinguishes high strength, low alloy steels (ASTM A992 & A572) in construction? - Correct Ans-Their high tensile strength while maintaining good weldability and ductility These kind of joints in a concrete slab isolates two adjacent slabs from horizontal and vertical movement: - Correct Ans-Expansion Joints With this type of bolted connection, the bolt uses the shear stress of the adjacent steel to allow for slipage to meet bear against the body of the bolt: - Correct Ans-Correct answer: Bearing-Type What is the main difference between cast iron and wrought iron: - Correct Ans-Carbon percentage The area below a slab that is typically a layer of rock to allow for drainage is called: - Correct Ans-Capillary Break When discussing the methods of curing a concrete slab. What method is not recommended in colder climates? - Correct Ans-Damp Curing When discussing floor flatness and floor levelness, which F-number is describing the deviation in the horizontal change in elevation of the concrete over a 10' span? - Correct Ans-Floor Levelness COSC 354 COSC 354 During the process of converting iron ore into steel, what materials are added together in a blast furnace to create elemental iron? - Correct Ans-Coke and Limestone What process revolutionized the steel industry by enabling the mass production of high quality steel at a lower cost? - Correct Ans-Bessemer Process During the manufacturing of steel, a mini-mill mostly uses scrap steel from what product: - Correct Ans-Cars When using brace framing in high seismic areas, a special type of brace framing is used. What is it called? - Correct Ans-Eccentrically Braced Frame What material is welded to the steel beam through the metal decking that allows for the decking, and concrete to act as a composite floor system? - Correct Ans-Shear Stud What is the purpose of concrete wall form ties in construction? - Correct Ans-Concrete wall form ties are used to maintain the desired spacing between formwork panels and provide stability during the pouring and curing of concrete What type of steel joining method is no longer used due to labor costs: - Correct Ans Riveting In a One-Way solid slab, the slab reinforcing runs in a singular direction that is then supported by grade beams, which are then supported by girders. What is the reinforcing in the slab called that runs perpendicular to the bottom bars: - Correct Ans-Correct answer: Shrinkage-temperature Reinforcing What is the proper order to finish concrete: - Correct Ans-Strike off -- Initial Float -- Second Float -- Trowel In class it was discussed that the US Steel headquarters building used a unique method for fireproofing their steel. What was that method? - Correct Ans-Water Filled Columns As discussed in class, composite decking does what for the floor system? Select the most correct answer. - Correct Ans-Makes the strength of the concrete and decking stronger together than they are apart To confirm a bolt is tensioned properly, this method provides for an easy visual inspection because the washer displays a liquid when fully tightened: - Correct Ans Load Indicator Washer Which of the following factors contributes significantly to the compressive strength of concrete masonry units (CMUs)? - Correct Ans-Type of aggregate used COSC 354 COSC 354 When discussing the stiff-mud molding technique, what equipment is used in extrusion molding to form continuous lengths of clay that are then cut into bricks? - Correct Ans Die A new mason has been given the task to tool the joints of a 2-story admin building. He is looking up on the internet all of the different tooling options. The lead brick mason has told him, "make sure you tool it so the water does not get trapped in the joint." Which of the options below would be the best option given the circumstances? - Correct Ans Concave In light gauge steel framing, what is the typical gauge range for steel studs used for non-loadbearing walls? - Correct Ans-16 or 18 gauge What is the purpose of damp-proofing in masonry construction? - Correct Ans-To prevent water from seeping into the masonry wall What stage of the brick manufacturing process