California Reinforcing Steel Contractor (C-50 License) Practice Exam

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• A #5 deformed bar has an approximate diameter of what?
• What must be done to welded wire fabric to prevent displacement until concrete sets?
• Which best describes a mechanical connection in which molten metal or 'metallic grout' interlocks the grooves inside the connection sleeve with the deformations on the bar?
• Which factors determine the type of hoisting equipment used for bars?
• What measurements must be entered in the Concrete Column Calculator?
• Which statement about shop lifts and field lifts is correct?
• What do Typical Placing Drawings show the Ironworker?
• How does seismic detailing influence reinforcement layout?
• Which ASTM standard covers low-alloy reinforcing bars with improved weldability?
• Post-tension is defined as tensioning tendons after the concrete has hardened. Which term describes this process?
• Under what circumstances might stainless steel rebar be used?
• Grade beams are typically formed how, according to standard practice?
• How should epoxy-coated bars be handled in the field to preserve their performance?
• Which is not a step to estimating the proper amount of concrete?
• Why is proper rebar placement critical for long-term durability?
• What should be used to resist diagonal tension in beams?
• Why is plan reading essential for a C-50 reinforcing steel contractor?
• Who determines the amount of concrete protection that is needed for each part of the project?
• What should the Ironworker review on every placing drawing?
• Which practice supports safe and correct placement of reinforcing bars on site?
• In the hot forged steel sleeve method, what causes additional bond and increases tensile strength as the assembly cools?
• Which documents verify reinforcement properties on a project?
• What is the primary reason to coordinate anchor bolt embedment with rebar layout?
• What does a rigid frame bridge usually consist of?
• When bars are placed at the top of a beam, taking the place of some concrete, what restrains them?
• The Block Wall Calculator assumes the use of which type of blocks?
• In a combined footing, where is the exterior column positioned in relation to the end of the footing?
• What is most commonly used for a tag line when hoisting bundles in congested areas?
• In reinforced concrete joist floors, how are the forms typically formed?
• The hot mix calculator uses a standard density of how many pounds per cubic foot?
• Which of the following best describes the function of stirrups in reinforced concrete beams?
• What is the correct practice regarding field welding on epoxy-coated bars?
• To estimate the amount of hot mix for a paving job, which calculator should you use?
• What is used at the end of bars when the straight length cannot provide enough embedment in concrete?
• Which of the following is NOT a factor influencing the required development length of a reinforcing bar?
• What step is typically taken to ensure rebar surfaces remain clean before pour?
• In simple beams, where is the longitudinal steel located to resist tensile stresses?
• What is a key safety concern when handling rebar at a job site?
• Which statement best describes the function of rebar ties?
• What devices are used to maintain concrete cover and spacing from forms and other bars?
• After piles for each footing are driven, where are they cut off?
• Before pouring, what checks must be performed when laying out reinforcing bars?
• Within each bar size category, how are lengths ordered in a bar list?
• How should rebar be stored on a job site to prevent damage?
• How many standard deformed bar sizes are there?
• Which description best matches the Unit Conversion Calculator?
• Epoxy-coated reinforcing bars are particularly advantageous in which environmental conditions?
• How are bar items classified within a bar list?
• What evidence do inspectors rely on to verify proper reinforcement placement?
• Which statement describes a key preventive measure against misalignment of reinforcement?
• What is the purpose of rebar ties?
• Which statement best describes the use of cover measurements in reinforcement placement verification?
• Which best describes a mechanical connection in which the sleeve is heated to a malleable temperature and fitted over the end of one bar?
• How does corrosion of reinforcement affect concrete structures?
• When calculating the amount of concrete needed for slabs, how much do you add to the thickness?
• What is the function of chairs or spacers in rebar installation?
• What is the purpose of combined footings?
• Which feature distinguishes deformed reinforcing bars from plain reinforcing bars?
• Which calculator estimates the amount of hot mix or road oil you will need?
• What is the net result of vertical and horizontal shear in a loaded beam or slab?
• How does a typical reinforcement grid relate to the project’s plan layout?
• In the Aggregate Calculator, which options determine rock density input?
• Welded Wire Fabric is often chosen for slabs for what reason?
• Marking systems for reinforcing bars may relate to which aspects?
• What do mechanical drawings display?
• What is a bar placing drawing used for?
• End-Bearing connection is used mainly for which application?
• A pile is driven to predetermined resistance; what is it called when this resistance is met?
• How can you estimate the amount of rebar needed for a grid layout?
• Which footing type is similar to a combined footing but supports several columns or walls on a single mat?
• In slab-beam-and-girder floor construction, what is cast at the same time?
• When the grade number 60 is marked on the bar, where is it located?
• Which of the following terms means to cut off as by two equal opposed forces?
• What is often used for an exterior column along a property line where a square column footing would extend beyond the building line?
• What is another name for slab reinforcement?
• What is the purpose of cover blocks or spacers in rebar placement?
• How thick should the wall footing be that a bearing wall rests upon?
• What is the term for the shear around columns in a slab?
• What is the difference between a beam and a girder?
• Which best describes a round smooth bar?
• What action should be taken if field measurements show an incorrect bar size?
• What should you do if a bar is kinked or bent beyond allowable radii?
• When estimating footing, what information is needed?
• What term best describes a beam that extends beyond supports in an overhanging position with the extended end unsupported?
• What is the purpose of shop drawings in reinforcing steel work?
• Name two primary codes/standards that govern reinforced concrete design in the U.S.
• In an open caisson foundation, how many feet in diameter is the hole dug?
• In concrete pavements, what can initial drying shrinkage and first cold weather cause?
• What letter is used for beams in the plan drawings?
• What is a key safety practice when handling rebar that reduces injury risk?
• What term describes a continuous foundation wall extending below the frost line to good bearing soil?
• On plan views, what do exterior solid and parallel dash lines indicate?
• What is the correct definition of development length for a reinforcement bar?
• When reinforcing bars are used around curved surfaces and no special requirements are established, how are they prefabricated?
• What provides stillness to the spiral to keep it in alignment while being erected?
• Prestressed concrete is reinforced concrete in which internal stresses have been introduced to reduce potential tensile stresses. How is the prestress commonly introduced?
• How are bar marks used in the field?
• What is usually placed to stop at the underside of the lowest supported beam or girder in the floor above?
• In a metal filled sleeve connection, the crucible contains filler metal that is ignited to become molten and flows into the sleeve to fill the space. What equipment is attached to the side of the sleeve to hold the crucible?
• What is Welded Wire Fabric primarily used for in slabs?
• What must be large enough and in the right places to accommodate building movement from earthquakes?
• How much stronger are bars than the same equivalent area of concrete?
• Which type of support has no protection against rusting and is used when supports do not contact exposed concrete?
• Which statement correctly describes a lap splice?
• What value best describes the distance at which temperature reinforcement is placed relative to the main steel in walls?
• Which calculator allows you to convert English to metric units?
• Site drawings display drainage structures, utility lines, elevations. Which of the following best completes this statement?
• Which item is typically included in a rebar material test report?
• What is the primary purpose of field inspections of reinforcing steel?
• Foundation walls can also function as retaining walls to withstand earth pressure. What does this help prevent?
• What size are the test cylinders for testing the strength of concrete?
• What is the purpose of anchor bolts and their relation to reinforcement?
• How does exterior exposure influence required concrete cover for reinforcement?
• In a bar placing drawing, which two groups primarily rely on the information it contains?
• Bent bars may have the same size and length but be different shapes. How are they clearly distinguished?
• Side forms removal timing after the concrete has hardened?
• Spacers used with spirals are typically what form?
• What is a direct consequence of reinforcement corrosion at the steel-concrete interface?
• Which calculator measures the number of cubic yards required for a column?
• What is the typical sequence for installing reinforcing bars in a pour?
• Why must bars be placed at right angles, in two directions on square or rectangle footings?
• What is the primary purpose of control joints in concrete slabs?
• Combined footings are reinforced with top bars and bottom bars to address curling in which direction?
• When is a mechanical coupler preferred over a lap splice?
• How are temporary works different from permanent reinforcement?
• What must be done to column vertical bars to prevent buckling under compression?
• The concrete arch is curved in which direction?
• What factors cause tension stress in concrete?
• Which calculator helps estimate the concrete volume required for a pour or placement?
• What is used when the subgrade is too soft to provide adequate bearing for a normal footing?
• How are tilt up walls cast?
• Which hook angles are standard for most bars, except where specified?
• Which calculator is used to estimate concrete needed for a wall?
• Which item is NOT typically included in a rebar material test report?
• How should damaged rebar be handled on site?
• When might Welded Wire Fabric be preferred over separate bars?
• If dimensions are needed, which drawings should be consulted to supplement placement drawings?
• Which standards specify the properties of reinforcing steel and their testing?
• Which two main categories of reinforcing bars are used in concrete construction?
• In which environment would stainless steel rebar be used due to corrosion risk?
• When reading plans, how are the columns represented?
• What is the relationship of the walls and deck in a rigid frame bridge?
• Which statement best describes why rebar should be stored off the ground?
• What should be considered when field welding of reinforcing bars?
• Which direction do walls deflect if braced at the top and bottom and loaded with horizontal pressures on the outside face?
• Which term describes a list of reinforcing bars that makes up a bill of materials?
• In which bridge does the span consist of a deck slab, a series of walls and a bottom slab, creating weight for longer spans?
• Which best describes a mechanical connection which uses a seamless steel coupler and portable hydraulic press?
• Which organization standardized the most common types of bends in support bars?
• Which best describes the standard type of reinforcing bar?
• What is the role of shear reinforcement in reinforced concrete?
• What is the primary responsibility of a C-50 Reinforcing Steel Contractor on a California project?
• When only two spacers are used, where are they placed?
• When more than two spacers are used, how may they be placed?
• Name factors that influence the required development length of a reinforcing bar.
• Why do roof slabs require reinforcement?
• For 3,000 psi concrete, the cylinders after 28 days should break at about how many pounds?
• What do architectural drawings display?
• Where are the test cylinders tested?
• Which best describes a mechanical connection that can be used only for transferring compression from bar to bar?
• Why are rebar chairs and spacers important during concrete placement?
• The hot mix density used by the Road Materials Calculator is assumed to be 150 pounds per cubic foot.
• How is compressive strength of concrete tested on the job?
• In corrosive environments, what is often used as a corrosion-protection system for reinforcement?
• What is the main purpose of taking test samples for concrete strength?
• How should vertical reinforcing bars in columns be supported?
• In which type of bar is the upper part bent to come inside the vertical bars in the column above?
• How are stirrups spaced along a beam?
• What information should a rebar material test report include?
• What is the primary function of spiral turns in column reinforcement?
• What is sometimes done to the bottom of an open caisson to provide the required bearing?
• How are bars identified to indicate where they are to be used?
• What is a common method to estimate rebar quantity for a grid layout?
• When a single span is used in a bridge, what are the end supports called?
• Which environmental factors accelerate reinforcement corrosion?
• Which statement best describes yield strength?
• Where are the specifications for reinforcement cover that protect against fire, corrosion or exposure found?
• How does plan reading relate to California CSLB licensing?
• In continuously reinforced concrete pavement, the reinforcement helps the pavement behave as what?
• What consists of a series of ribs, similar to small beams with a top slab, and are cast at one time with the supporting beams?
• As a rule, what is not included in placement drawings?
• What is a similarity between bridge construction and building construction?
• Which best describes a mechanical connection consisting of a taper threaded sleeve that joins rebar with matching taper threads, preventing cross-treading during installation?
• What term describes reinforcement added to slabs to accommodate temperature changes and shrinkage?
• What do ASTM Specifications require to be printed on each reinforcement bar?
• In prestressed concrete, a tendon is defined as which of the following?
• A bearing wall rests upon a continuous wall footing at least twice as wide as the wall thickness. What is the purpose of this extra width?
• Which calculator helps estimate the aggregate tonnage required?
• In box girder bridges, how does depth vary in longer spans?
• What problem does inadequate shear reinforcement typically address?
• In flat plate slab construction, columns are typically what shape and feature?
• What are spirals called that come without spacers?
• What happens if there is improper positioning of the reinforcing bars?
• What is the difference between flat plate slab construction and a flat slab?
• Who is responsible for providing and identifying the lengths of splices in reinforcement?
• What is a common cause of misaligned reinforcement and how is it prevented?
• What is used to firmly hold the bars at the required clearance from forms during placement?
• What are typical shear reinforcement components?
• Why should you have a cement supplier visit the job site?
• When ordering concrete, you should _________
• What are forms usually made of?
• Pile footings may be square or rectangular in shape, but may also be which other shapes depending on the number of piles in the group or the arrangement?
• Where are the straight reinforcement bars cut?
• Why are splices unavoidable in reinforcement?
• What considerations apply to epoxy-coated bars during handling and transport?
• What is meant by crossing bars and grid intersections?
• What is the purpose of using a schedule in reinforcing bars?
• Which best describes a two-way reinforced concrete joist floor with ribs running in both directions?
• In reinforced concrete walls, at what angle is temperature reinforcement used relative to the main steel?
• To use the Concrete Volume Calculator, which measurements must you enter?
• What step is typically taken to ensure rebar has clean, oil-free surfaces before concrete pour?
• What does the small circle adjacent to a column indicate?
• Which document type is typically used to verify the exact rebar sizes and grade specified for a project?
• What are units of reinforcing bars as loaded for shipment called?
• Which ASTM standard covers carbon-steel reinforcing bars commonly used in structural concrete?
• What is one primary reason for using epoxy-coated reinforcing bars?
• Omitting letters from a bar list during detailing would result in what change to the bar?
• Which best describes the structural steel beams when a slab is used?
• When installing a threaded steel coupling, what operation is performed to secure the connection?
• How are joists represented in a set of plans?
• Where do tension cracks begin in an unreinforced beam when loaded?
• If the bottom of a beam is in tension, what is the top in?
• What is the purpose of chamfer strips in forms?
• Why do radially prefabricated bars tend to relax the radius originally prefabricated?
• Welded Wire Fabric in slabs is used to provide what function?