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Question 1. Which OSHA standard primarily governs the use of personal protective equipment (PPE) on construction sites? A) 29 CFR 1926. B) 29 CFR 1910. C) 29 CFR 1926. D) 29 CFR 1926. Answer: A Explanation: OSHA’s construction standards are found in 29 CFR Part 1926; Subpart C (1926.20) specifically addresses PPE requirements for construction workers. Question 2. The minimum impact resistance (Class E) required for hard hats on construction sites is measured in: A) Joules B) Newton-meters C) Foot-pounds D) Kilograms Answer: A Explanation: Hard hat impact resistance is tested in joules; Class E hats must withstand a 5 J impact. Question 3. When selecting hearing protection for a job with an average noise level of 95 dBA, which device provides the highest combined noise reduction? A) Foam earplugs (NRR 33) B) Earmuffs (NRR 28) C) Double-plug system (earplugs + earmuffs, NRR ≈ 45) D) Canal caps (NRR 22) Answer: C Explanation: Combining earplugs and earmuffs yields an additive reduction (NRR ≈ 45), offering the greatest protection.
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Question 4. According to OSHA, which of the following is the minimum required toe height for safety footwear on a construction site? A) 6 mm B) 8 mm C) 10 mm D) 12 mm Answer: B Explanation: OSHA Standard 1926.95(a)(1) requires protective footwear with a toe cap of at least 8 mm (0.315 in) steel. Question 5. A carpenter must use gloves when handling which of the following tasks? A) Installing drywall screws B) Operating a table saw C) Cutting electrical conduit with insulated tools D) All of the above Answer: D Explanation: Gloves protect against cuts, abrasions, and electrical hazards; OSHA recommends appropriate gloves for each task. Question 6. The maximum safe working height for a portable ladder without a fall arrest system is: A) 6 ft B) 12 ft C) 20 ft D) 30 ft Answer: C Explanation: OSHA allows portable ladders up to 20 ft; above that a fall-arrest system or scaffold is required.
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Question 10. Which of the following is a required feature of a lock-out/tag-out device for a hand-held power tool? A) Must be removable only with a key. B) Must be attached to the tool’s power source. C) Must be color-coded red. D) Must be made of metal. Answer: B Explanation: The device must be affixed to the energy-isolating means to prevent accidental re-energizing. Question 11. When using a pneumatic nail gun, the recommended maximum air pressure is: A) 70 psi B) 90 psi C) 110 psi D) 130 psi Answer: B Explanation: Most pneumatic nailers operate safely at 70- 90 psi; exceeding 110 psi can cause premature wear or failure. Question 12. The purpose of a GFCI on a construction site is to: A) Prevent over-current. B) Detect ground faults and quickly disconnect power. C) Reduce voltage spikes. D) Provide surge protection. Answer: B Explanation: Ground-Fault Circuit Interrupters trip when current leakage to ground exceeds 5 mA, protecting workers from shock. Question 13. Which of the following is the correct method for extending an extension cord for a power tool?
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A) Connect two cords end-to-end, then use a third cord to reach the tool. B) Use a single cord of adequate length; never splice cords. C) Use a triple-rated cord and tape the splice. D) Connect cords with a power strip. Answer: B Explanation: OSHA prohibits splicing extension cords; a single cord of sufficient length must be used. Question 14. In blueprint reading, a “footing plan” typically shows: A) Roof pitch and overhangs. B) Location and size of concrete footings. C) Window schedules. D) Electrical conduit routes. Answer: B Explanation: A footing plan details the size, depth, and placement of concrete footings supporting the structure. Question 15. Converting a measurement from 7 ft 4 in. to decimal feet yields: A) 7.33 ft B) 7.40 ft C) 7.67 ft D) 7.75 ft Answer: B Explanation: 4 in. = 4/12 ft = 0.333 ft; 7 ft + 0.333 ft = 7.333 ft ≈ 7.40 ft when rounded to two decimals. Question 16. When laying out a wall on a batter board, the reference point used to transfer dimensions is called the: A) Bench mark B) Control point
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D) Between the top and bottom plates of a non-load-bearing wall. Answer: C Explanation: Cripple studs fill the short spaces above and below openings, providing support for sheathing and loads. Question 20. When framing a floor system with joists spaced 16 in. on center, the minimum joist size for a 12-ft span in a 2-by-8 wall is: A) 2 × 6 B) 2 × 8 C) 2 × 10 D) 2 × 12 Answer: B Explanation: Span tables indicate a 2-by-8 joist at 16 in. o.c. can span up to about 12 ft for typical residential loads. Question 21. The purpose of bridging (blocking) between floor joists is to: A) Provide a nailing surface for subfloor. B) Reduce joist deflection and distribute loads. C) Increase the height of the floor system. D) Serve as a fire barrier. Answer: B Explanation: Bridging ties joists together, limiting lateral movement and reducing deflection under load. Question 22. When installing roof rafters, the “bird’s mouth” cut is used to: A) Fit the rafter onto the ridge board. B) Provide a seat for the rafter on the top plate. C) Allow the rafter to sit securely on the top plate. D) Create a notch for a decorative element. Answer: C
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Explanation: The bird’s mouth notch creates a bearing seat for the rafter on the wall plate, supporting roof loads. Question 23. Pre-engineered wood trusses must be restrained during installation by: A) Only using nails. B) Using metal straps and temporary bracing as specified by the truss manufacturer. C) Tying them with string. D) Relying on gravity alone. Answer: B Explanation: Truss manufacturers require specific metal straps and temporary bracing to prevent movement before permanent connections are made. Question 24. The correct sequence for building a concrete footing form is: A) Set forms → place reinforcement → pour concrete → strip forms. B) Place reinforcement → set forms → pour concrete → strip forms. C) Set forms → pour concrete → place reinforcement → strip forms. D) Place reinforcement → pour concrete → set forms → strip forms. Answer: B Explanation: Reinforcement must be positioned before concrete is poured; forms are set to hold the concrete shape, then stripped after curing. Question 25. To achieve a level concrete slab, the formwork should be checked with a: A) Laser level B) Tape measure C) Chalk line D) Plumb bob Answer: A
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Question 29. When installing a crown molding on a wall that is 8 ft high, the miter saw should be set to cut the molding at: A) 45° on both ends B) 45° on one end, 0° on the other C) 22.5° on both ends (outside corner) D) 30° on both ends Answer: C Explanation: Crown molding requires compound cuts; a 22.5° miter on each end creates a 45° outside corner. Question 30. Coping a baseboard joint is performed when: A) The wall is straight. B) The joint is an inside corner. C) The joint is a 90° outside corner. D) The baseboard is made of metal. Answer: B Explanation: Coping is used for interior corners to fit the profile of the baseboard against the adjoining piece. Question 31. The correct method for flashing a window opening is: A) Apply flashing tape only to the interior side. B) Install sill flashing first, then side flashing, and finally head flashing, overlapping each layer outward. C) Install head flashing first, then side, then sill. D) Use only silicone caulk. Answer: B Explanation: Proper flashing sequence starts at the bottom (sill) and works upward, each layer overlapping the previous to shed water. Question 32. A pre-hung exterior door should be set so that the rough opening is:
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A) 1/8 in. larger than the door slab. B) 1/2 in. larger in width and 3/8 in. larger in height. C) 1 in. larger in both dimensions. D) Exactly the same size as the door slab. Answer: B Explanation: Standard rough opening for a pre-hung door is 2 × 6 in. larger in width and 3/8 in. taller to allow for shims and adjustments. Question 33. Which hardware is required to secure a swinging door to a frame in a fire-rated assembly? A) Standard hinges. B) Fire-rated hinges with a 3-hour rating. C) Ball bearings. D) Decorative hinges only. Answer: B Explanation: Fire-rated assemblies must use hinges tested to maintain fire resistance; standard hinges are not sufficient. Question 34. The minimum tread depth for a residential stair according to the IBC is: A) 9 in. B) 10 in. C) 11 in. D) 12 in. Answer: B Explanation: The IBC specifies a minimum tread depth of 10 in. for residential stairs. Question 35. Handrail height for a stairway serving the public is required to be: A) 30 in. to 34 in. above the nosing. B) 34 in. to 38 in. above the nosing.
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D) Installed only on the exterior side. Answer: B Explanation: Proper insulation fills the cavity without compression to maintain its R-value. Question 39. The fire-stop rating for a typical sealed wall penetration using fire-rated caulk is: A) 30 min B) 1 hour C) 2 hours D) 3 hours Answer: B Explanation: Most fire-rated caulks are rated for a 1-hour fire resistance when applied correctly. Question 40. Vinyl siding is typically installed with a minimum overlap of: A) 1 in. horizontally, 2 in. vertically. B) 2 in. horizontally, 4 in. vertically. C) 3 in. horizontally, 6 in. vertically. D) 4 in. horizontally, 8 in. vertically. Answer: B Explanation: Vinyl siding requires a 2-in. horizontal overlap and at least 4-in. vertical overlap for water shedding. Question 41. The most common nail size for attaching 1/2-in. plywood sheathing to wall studs is: A) 6-d. common nail B) 8-d. common nail C) 10-d. common nail D) 12-d. common nail
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Answer: B Explanation: An 8-d. nail provides sufficient penetration (1 in. into the stud) for 1/2-in. plywood. Question 42. When framing a door opening, the minimum rough opening width for a 36 in. door slab is: A) 36 in. B) 38 in. C) 40 in. D) 42 in. Answer: C Explanation: A 36 in. slab requires a rough opening of about 40 in. to allow for shims and the door frame. Question 43. Which of the following engineered wood products is made by bonding multiple layers of veneer with adhesive under heat and pressure? A) LVL (Laminated Veneer Lumber) B) Glulam (Glued Laminated Timber) C) I-joist D) OSB (Oriented Strand Board) Answer: B Explanation: Glulam consists of layers of dimensional lumber or veneer bonded together with structural adhesives. Question 44. The allowable span for a 2-by-12 floor joist spaced 24 in. on center, supporting a live load of 40 psf, is approximately: A) 12 ft B) 14 ft C) 16 ft D) 18 ft Answer: C
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Explanation: A 5/8-in. OSB panel meets the structural requirements for typical residential roof loads. Question 48. The International Building Code (IBC) requires a minimum egress width for a stairway serving a residential occupancy of: A) 24 in. B) 28 in. C) 32 in. D) 36 in. Answer: B Explanation: IBC 1012.3 requires a minimum clear width of 28 in. for stairways in residential occupancies. Question 49. The term “grade” when referring to lumber means: A) The moisture content of the wood. B) The structural strength and allowable uses based on defects. C) The color of the wood. D) The type of finish applied. Answer: B Explanation: Lumber grade classifies the wood’s strength, stiffness, and allowable applications by evaluating knots and other defects. Question 50. A “king stud” in a wall opening is: A) The stud that carries the header. B) The stud that sits directly under the header. C) The stud that runs from the sill to the top plate on each side of the opening. D) The stud that supports the drywall. Answer: C Explanation: King studs run full height on each side of an opening, supporting the header and transferring loads to the foundation.
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Question 51. The correct way to secure a temporary brace for a wall form is to: A) Nail the brace to the form panels only. B) Tie the brace to the ground with a rope. C) Attach the brace to a stable anchor point such as a slab or existing wall. D) Use only a metal strap. Answer: C Explanation: Temporary bracing must be anchored to a stable element to resist lateral forces during concrete placement. Question 52. When using a circular saw with a blade guard, the guard must be: A) Removed for faster cutting. B) Adjusted to the width of the cut and left in place. C) Covered with a towel. D) Replaced after each use. Answer: B Explanation: OSHA requires the blade guard to be in place and adjusted to the cut width to protect the operator. Question 53. In a residential framing project, the typical spacing for wall studs 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. on center is the most common spacing for residential wall studs, balancing material efficiency and load capacity. Question 54. The recommended minimum clearance between a recessed light fixture and the edge of a ceiling joist is: A) 1 in.
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C) Seal the window, then install flashing, then secure the window. D) Install flashing only on the interior side. Answer: B Explanation: Flashing must be placed first to direct water away; the window is then set into the flashing, followed by sealing. Question 58. Which of the following is a required feature of a stair tread for a commercial building? A) Slip-resistant surface. B) Decorative molding only. C) Tread depth of 8 in. D) No nosing. Answer: A Explanation: Commercial stairs must have slip-resistant surfaces to meet safety requirements. Question 59. The minimum fire-rated rating for a wall assembly separating a dwelling unit from a garage is: A) 30 min B) 1 hour C) 2 hours D) 3 hours Answer: B Explanation: The IBC requires a 1-hour fire-rated wall between a garage and an adjoining dwelling unit. Question 60. For a residential exterior wall, the recommended minimum R-value for insulation in Nevada’s climate zone 4 is: A) R- 13 B) R- 19 C) R- 30
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D) R- 38
Answer: C Explanation: Nevada zone 4 typically requires R-30 insulation for exterior walls to meet energy code standards. Question 61. In a drywall joint, the “butt joint” is treated by: A) Applying paper tape only. B) Using a metal corner bead. C) Applying a layer of joint compound and embedding paper tape for reinforcement. D) Leaving it untreated. Answer: C Explanation: Butt joints receive a thin coat of compound, tape, and additional coats to create a smooth surface. Question 62. The proper way to install a door jamb that will receive a fire-rated door is to: A) Use standard wood jambs. B) Use a metal fire-rated jamb assembly. C) Reinforce a wood jamb with additional nails. D) Apply fire-retardant paint to the jamb. Answer: B Explanation: Fire-rated doors must be installed in fire-rated jambs to maintain the assembly’s rating. Question 63. When installing a metal roof deck, the minimum recommended spacing for the supporting purlins is: A) 12 in. on center. B) 16 in. on center. C) 24 in. on center. D) 30 in. on center.
