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Question 1. Which OSHA regulation specifically requires the use of fall protection when a carpenter works at a height of 6 feet or more above a lower level? A) 29 CFR 1910. B) 29 CFR 1926. C) 29 CFR 1910. D) 29 CFR 1926. Answer: B Explanation: OSHA construction standard 29 CFR 1926.501 mandates fall protection for employees working at heights of 6 ft or greater. Question 2. When inspecting a portable step ladder, which condition is a definite violation? A) The ladder has rubber feet. B) The side rails are painted. C) The ladder is missing a rung. D) The ladder is 6 ft tall. Answer: C Explanation: Missing any rung compromises the ladder’s structural integrity and is a safety violation. Question 3. The most appropriate PPE when operating a pneumatic nail gun includes: A) Safety glasses and hearing protection only. B) Hard hat, safety glasses, hearing protection, and gloves. C) Steel-toed boots and a respirator. D) No PPE is required if the tool is in good condition. Answer: B Explanation: OSHA requires eye, ear, and hand protection, and a hard hat is standard on construction sites. Question 4. Which of the following power tools requires a blade guard to be engaged at all times during operation? A) Circular saw
B) Table saw C) Reciprocating saw D) Jigsaw Answer: B Explanation: Table saws have a high‑risk blade; the guard must be in place to prevent contact. Question 5. In a framing plan, the symbol “⎕” most commonly represents which component? A) Header B) Joist hanger C) Trimmer stud D) Cripple stud Answer: B Explanation: The standard drafting symbol for a joist hanger is a small “⎕” placed on the side of a joist line. Question 6. When reading a blueprint, the term “rough opening” refers to: A) The finished size of a door or window. B) The space left after framing for a door or window, larger than the finished unit. C) The opening left for future expansion. D) The opening after drywall is installed. Answer: B Explanation: A rough opening is larger than the finished unit to allow for shims and adjustments. Question 7. The correct method to transfer a layout line from a floor to a wall is: A) Use a laser level only. B) Snap a chalk line directly on the floor and copy it by eye. C) Use a plumb bob from a known reference point. D) Measure with a tape and mark directly on the wall. Answer: C
Question 11. When installing a sill plate on a concrete foundation, the code‑required minimum anchoring depth for a #10 × 2 in wood screw is: A) 1 in into the concrete. B) 1‑½ in into the concrete. C) 2 in into the concrete. D) 2‑½ in into the concrete. Answer: C Explanation: The IRC requires a minimum embedment of 2 in for #10 × 2 in screws into concrete. Question 12. A pressure‑treated sill plate is required because: A) It prevents termite damage. B) It resists moisture and decay when in contact with concrete. C) It is lighter than standard lumber. D) It eliminates the need for a moisture barrier. Answer: B Explanation: Pressure‑treated lumber is rated for contact with concrete and resists rot. Question 13. Using a span table, a 2×10 Southern Pine joist spanning 12 ft at 40 psf live load is acceptable. If the live load increases to 60 psf, the maximum allowable span becomes: A) 10 ft B) 11 ft C) 12 ft (unchanged) D) 13 ft Answer: A Explanation: Higher live loads reduce allowable span; the table shows 10 ft for 60 psf. Question 14. The purpose of bridging or blocking between floor joists is to: A) Provide a nailing surface for subfloor. B) Reduce joist rotation and distribute loads.
C) Increase the height of the floor system. D) Act as fire blocking. Answer: B Explanation: Bridging/ blocking stiffens the joist system, limiting lateral movement. Question 15. When framing a stairwell opening, the double header must be supported by: A) Two rim joists. B) A single king stud. C) Two jack studs (trimmers). D) The top plate only. Answer: C Explanation: Double headers transfer loads to jack studs on each side of the opening. Question 16. In wall framing, the term “cripple stud” refers to: A) A stud that runs from the top plate to a header. B) A short stud installed above a window opening. C) A stud that supports a door. D) A stud used only in basements. Answer: B Explanation: Cripple studs fill the space between the top plate and a header or sill and the floor. Question 17. For a wall with 24‑in on‑center stud spacing, the maximum allowable length of a single piece of OSB sheathing without seams is: A) 4 ft B) 8 ft C) 12 ft D) 16 ft Answer: B
B) Remains permanently in place. C) Is only required for the first 24 in of the truss. D) Must be steel only. Answer: B Explanation: The IRC requires permanent bracing for trusses unless the truss manufacturer specifies otherwise. Question 22. The correct spacing for H‑clips when installing OSB roof decking on a 2‑by‑12 rafter system is: A) 12 in on center. B) 16 in on center. C) 24 in on center. D) 6 in on center. Answer: B Explanation: H‑clips are typically spaced 16 in on center to align with the rafter spacing. Question 23. The primary purpose of a weather‑resistive barrier (WRB) is to: A) Provide structural support for siding. B) Act as an air barrier only. C) Create a drainage plane that prevents water infiltration. D) Insulate the building envelope. Answer: C Explanation: WRBs (e.g., house wrap) allow water that gets behind siding to drain away. Question 24. When installing house wrap, the correct lap direction is: A) Upper edge over lower edge. B) Lower edge over upper edge. C) No overlap is required. D) Overlap only at corners.
Answer: A Explanation: Overlapping the upper edge over the lower creates a shingle effect that sheds water. Question 25. Which flashing detail is required at the intersection of a roof and a vertical wall (e.g., a chimney) to prevent water ingress? A) Step flashing B) Counter flashing C) Drip edge D) Ridge flashing Answer: B Explanation: Counter flashing is installed over step flashing at a vertical wall penetration. Question 26. The minimum height for a drip edge on a roof eave is: A) 1 in B) 2 in C) 4 in D) 6 in Answer: B Explanation: A 2‑in drip edge directs water away from the fascia and soffit. Question 27. Before installing a pre‑hung exterior door, the rough opening must be: A) Exactly the same size as the door slab. B) 1/8 in larger in width and height for shims. C) 1/4 in larger in width and 1/2 in larger in height. D) 1/2 in larger in both dimensions. Answer: C Explanation: Standard practice allows 1/4 in extra width and 1/2 in extra height for shimming and leveling.
C) The hinge set. D) The lockset. Answer: B Explanation: Casing is the decorative trim that covers the gap between the door frame and the wall. Question 32. The most accurate method for cutting an inside corner on baseboard is: A) Miter both pieces at 45°. B) Coping the first piece and mitering the second at 45°. C) Using a bevel cut on both pieces. D) Cutting both pieces square and overlapping. Answer: B Explanation: Coping provides a tighter fit for inside corners, while the adjacent piece is mitered. Question 33. Crown molding installed on a ceiling with a 90‑degree angle requires which tool setting for a perfect cut? A) 45° bevel, 45° miter. B) 45° bevel, 0° miter. C) 0° bevel, 45° miter. D) 22.5° bevel, 22.5° miter. Answer: A Explanation: Crown molding sits at a 45‑degree angle to both the wall and ceiling, requiring both bevel and miter at 45°. Question 34. When installing a hinge on a door, the correct distance from the top of the door to the top hinge is typically: A) 3 in B) 6 in C) 7 in D) 10 in Answer: C
Explanation: Standard residential doors place the top hinge 7 in from the top edge. Question 35. A cabinet that is installed against a wall must be shimmed at the back to achieve: A) Level top surface only. B) Square alignment with adjacent cabinets and level front. C) Only a plumb side. D) No shims are required if the wall is flat. Answer: B Explanation: Shims at the back ensure the cabinet is both level and square to neighboring units. Question 36. The recommended spacing for wall studs when installing heavy wall cabinets is: A) 12 in on center. B) 16 in on center. C) 24 in on center. D) 30 in on center. Answer: A Explanation: 12‑in spacing provides additional support for heavy loads. Question 37. The maximum riser height allowed by most residential building codes is: A) 7 in B) 7 ½ in C) 8 in D) 8 ½ in Answer: B Explanation: The IRC limits riser height to 7 ½ in for safety and comfort. Question 38. The minimum tread depth required by code for a residential stair is: A) 9 in B) 10 in
Question 42. The maximum spacing allowed between balusters in a guardrail is: A) 2 in B) 3 in C) 4 in D) 5 in Answer: C Explanation: A 4‑in sphere must not be able to pass through, limiting spacing to 4 in. Question 43. Handrail height for interior stairs is required to be: A) 30‑ 34 in above the nosing. B) 34‑ 38 in above the nosing. C) 36‑ 40 in above the nosing. D) 38‑ 42 in above the nosing. Answer: B Explanation: The IRC specifies handrail height between 34 in and 38 in. Question 44. A newel post must be attached to the floor framing using: A) Two 3‑in nails. B) A metal bracket only. C) At least two 3‑in screws or bolts anchored to joists. D) Glue and nails. Answer: C Explanation: Secure attachment requires fasteners that penetrate the floor joists. Question 45. When installing a fire block in a wall cavity, the material must be: A) 1/2‑in plywood or equivalent. B) 1‑in OSB. C) Any type of insulation. D) Only metal studs.
Answer: A Explanation: The IRC permits 1/2‑in plywood, OSB, or equivalent as fire block material. Question 46. The correct method to attach a pressure‑treated rim joist to a foundation wall is: A) Use untreated nails. B) Use corrosion‑resistant (galvanized or stainless) fasteners. C) Glue it in place. D) No fasteners are required. Answer: B Explanation: Pressure‑treated lumber requires corrosion‑resistant fasteners to prevent deterioration. Question 47. In a platform framing system, the top plate of the lower story typically: A) Is nailed directly to the joists of the floor above. B) Is glued to the floor joists. C) Is left unattached. D) Is bolted with lag screws. Answer: A Explanation: The top plate is nailed to the joists of the floor above for structural continuity. Question 48. The term “king stud” refers to: A) The stud that runs from the sill to the top plate and supports a header. B) The short stud above a window. C) The stud that carries the load of a roof. D) The stud used only in basements. Answer: A Explanation: A king stud runs full height and supports the header at an opening. Question 49. When installing OSB sheathing on walls for lateral stability, the recommended fastener spacing is:
Explanation: A cross‑line laser provides both vertical and horizontal reference lines for layout. Question 53. The correct way to install a metal joist hanger for a 2×10 joist is to: A) Nail it with 6‑d common nails. B) Use 3‑in structural screws at each pre‑drilled hole. C) Glue the hanger to the joist. D) Staple it with a pneumatic stapler. Answer: B Explanation: The ICC requires structural screws (or approved nails) at each hanger hole for a secure connection. Question 54. In roof framing, a “purlin” is: A) A horizontal member that supports rafters on a sloped roof. B) The diagonal brace in a roof truss. C) The ridge board. D) The same as a rafter. Answer: A Explanation: Purlins run horizontally across a roof and support rafters or decking. Question 55. The minimum thickness of exterior sheathing required for a 2‑story residential building is: A) 1/4 in OSB B) 1/2 in plywood or OSB C) 5/8 in plywood only D) 3/4 in plywood only Answer: B Explanation: The IRC requires at least 1/2‑in structural sheathing for 2‑story walls. Question 56. When installing a door slab without a pre‑hung frame, the correct sequence is:
A) Install hinges, then frame, then door. B) Install frame, set door, then attach hinges. C) Attach hinges to the slab, then set the frame around it. D) Install the door first, then the frame. Answer: B Explanation: The frame is installed first, the door is set within it, then hinges are attached. Question 57. The term “flashing” in exterior construction primarily refers to: A) Decorative trim. B) A metal or membrane material that redirects water. C) A type of insulation. D) The paint used on siding. Answer: B Explanation: Flashing creates a water‑resistive barrier at joints and penetrations. Question 58. For a window installed on a wall with a 2‑in exterior sheathing, the minimum flashing width extending up the wall should be: A) 2 in B) 4 in C) 6 in D) 8 in Answer: C Explanation: The IRC requires at least 6 in of flashing up the wall to integrate with the WRB. Question 59. When applying a self‑adhered membrane as a WRB, the recommended overlap between sheets is: A) 2 in B) 4 in C) 6 in
A) The wall is perfectly vertical. B) The wall is plumb and the corners are 90°. C) The wall is level. D) The wall is free of any twists. Answer: B Explanation: “Square” refers to both plumb (vertical) and a 90° corner. Question 64. The correct fastener for attaching a 1/2‑in OSB roof deck to 2‑by‑12 rafters is: A) 6‑d common nail, 1 in. B) 8‑d common nail, 1 ½ in. C) 16‑d common nail, 2 in. D) 3‑in ring shank nail, 2 in. Answer: D Explanation: A 3‑in ring shank nail provides the holding power required for roof decking. Question 65. Which of the following is NOT a typical component of a stair stringer? A) Riser notch B) Tread notch C) Heel cut D) Bird’s‑mouth Answer: C Explanation: The heel cut is a term used for door jambs, not stair stringers. Question 66. The minimum distance a stair tread must overhang the riser (the “nosing”) is: A) 0 in (no overhang) B) 0.5 in C) 1 in D) 1.5 in Answer: B
Explanation: The IRC permits a minimum overhang (nosing) of 0.5 in. Question 67. When installing a handrail on a stair, the code requires the handrail to extend: A) 6 in beyond the top and bottom of the stairs. B) 12 in beyond the top and bottom of the stairs. C) 18 in beyond the top and bottom of the stairs. D) No extension is required. Answer: B Explanation: The handrail must continue at least 12 in past the top and bottom of the stair run. Question 68. The term “blocking” in wall framing is primarily used to: A) Provide a fire‑resistive barrier. B) Support fixtures like cabinets or handrails. C) Increase wall insulation value. D) Replace studs in a wall. Answer: B Explanation: Blocking gives a solid backing for mounting heavy items. Question 69. For a 2‑by‑4 stud wall, the maximum allowable spacing for a load‑bearing wall with 2×6 sheathing is: A) 12 in on center. B) 16 in on center. C) 24 in on center. D) 30 in on center. Answer: B Explanation: 16‑in spacing is standard for load‑bearing walls with 2×6 sheathing. Question 70. The purpose of “temporary bracing” during wall erection is to: A) Provide permanent lateral support.
