CSLB General Building (B) — All Questions

On a drawing at 1/4 inch = 1 foot-0 inches, a wall measures 3 inches long on the paper. What is the actual length of that wall?

• a.48 feet
• b.3 feet
• c.9 feet
• d.12 feet✓

At 1/4 inch = 1 foot, each inch on the paper equals 4 feet (because 1 divided by 1/4 = 4). So 3 inches x 4 feet per inch = 12 feet. Correct answer is 12 feet. '3 feet' wrongly treats one inch as one foot. '48 feet' uses 16 feet per inch. '9 feet' has no valid basis.

On a civil drawing using an engineer's scale of 1 inch = 20 feet, a property line measures 4.5 inches on the paper. What is its actual length, and how does an engineer's scale differ from an architect's scale?

• a.900 feet; the engineer's scale multiplies every inch by 200, so a civil site plan is read at ten times the ratio printed in its title block and the bar scale printed on the sheet is read the same way
• b.90 feet; the engineer's scale divides the inch into decimal units (e.g., 10, 20, 30, 40, 50, 60 per inch), whereas the architect's scale is based on feet-and-inches fractions.✓
• c.20 feet; the two scales are identical in how they divide the inch, so a civil drawing and a floor plan may be measured with either one of them so either scale may be used on either kind of sheet
• d.4.5 feet; the engineer's scale uses fractions of an inch that each equal one foot, so the paper measurement is read directly as the field length with no further conversion needed at all

Correct: 4.5 inches x 20 feet per inch = 90 feet. The engineer's scale divides each inch into decimal parts (10, 20, 30, ... per inch) and suits civil/site work, while the architect's scale uses fractional-inch-per-foot ratios (e.g., 1/4 inch = 1 foot) for building plans. '20 feet' ignores the measured length. '4.5 feet' confuses the scales. '900 feet' multiplies by the wrong factor.

Which drawing type shows a building as if cut vertically to reveal interior heights, floor and wall assemblies, and how components connect?

• a.An exterior elevation, a straight-on view of a building face.
• b.A floor plan, which is a horizontal cut viewed from above.
• c.A section, a vertical cut through the building.✓
• d.A site plan showing the building footprint on the lot.

Correct: a section is drawn as a vertical cut through the building to reveal interior heights and the makeup of walls, floors, and roofs. A plan is a horizontal cut seen from above. An elevation is a flat, straight-on view of an exterior or interior face. A detail (not listed as correct here) is an enlarged view of a small area; a site plan shows the whole lot.

On a set of construction drawings, what is the PRIMARY purpose of a door schedule?

• a.It is a table listing each door's mark, size, type, material, hardware, and fire rating for ordering and installation.✓
• b.It lists the calendar dates by which each door must be installed so the superintendent can track the millwork delivery against the schedule
• c.It is the closeout list of damaged doors to be replaced.
• d.It shows the electrical circuits feeding automatic door operators, with the panel and breaker serving each opening noted beside the door

Correct: a door schedule is a table keyed to door marks on the plans that gives each door's size, type, material, hardware set, and rating so it can be ordered and installed correctly. A door schedule is not a calendar of dates, an electrical drawing, or a punch list of damage; those are different documents.

On construction drawings, what does a 'revision cloud' with a triangular 'delta' symbol indicate?

• a.The location of a survey benchmark elevation used as the datum for the site.
• b.An area of the drawing that has been changed, with the delta noting the revision number.✓
• c.The true-north orientation of the site, from which the bearings are measured.
• d.A required fire-rated wall assembly and the hourly rating it must meet.

Correct: a revision cloud outlines the changed area and the triangular delta next to it carries the revision number, alerting readers to what changed and when. The north orientation is shown by a north arrow. Fire-rated assemblies are called out by rating notes/symbols. A benchmark is a datum reference, marked differently.

Which statement BEST reflects required inspection timing for concealed work?

• a.Concealed work is inspected only once, at the final inspection before occupancy, when the building is complete and ready for use.
• b.Underground piping should be backfilled immediately and inspected by re-excavation only if a problem is suspected during later testing.
• c.Footings may be poured first and the reinforcing inspected later after stripping the forms from the cured concrete.
• d.Foundation reinforcement and forms must be inspected before concrete is placed, and underground plumbing must be inspected before the trench is backfilled.✓

Correct: inspections of work that will be concealed must occur before it is covered, so foundation steel/forms are inspected before the pour and underground piping is inspected before backfill. Pouring first and inspecting later defeats the purpose. Backfilling before inspection buries the work. A single final inspection cannot verify concealed conditions.

During interior work, in what order must inspections generally occur before the walls are closed up?

• a.Only a single final inspection is required; the intermediate inspections are optional and may be waived by the contractor to keep the job moving on the next project.
• b.Insulation is installed and inspected first, then rough framing, then the MEP rough-in is run through the studs that were already insulated before the cover goes on.
• c.Drywall may be hung before the rough MEP inspection to keep the schedule moving, and the inspector reviews the concealed work from photographs sent in by the crew.
• d.Rough framing and rough mechanical/electrical/plumbing are inspected and approved before insulation, and insulation is inspected before drywall covers it.✓

Correct: work is inspected while still visible. Rough framing and rough MEP are approved first, then insulation is installed and inspected, and only then is drywall hung to cover everything. Installing insulation before framing/MEP approval, hanging drywall before rough MEP, or skipping intermediate inspections would conceal work that must be inspected first.

In critical path method (CPM) scheduling, which statement is correct?

• a.The critical path is the longest path through the network and has zero float; delaying any critical activity delays the whole project, while delaying a non-critical activity only within its float does not.✓
• b.Activities on the critical path have the most float and can slip freely without affecting the finish date, because the float on that path is what absorbs every delay the job runs into that the estimator priced into the bid
• c.Float is the extra profit margin built into the project schedule, set aside at bid time and released to the contractor as each scheduled activity is reported complete on the application for that particular line of work
• d.The critical path is the shortest chain of activities in the network.

Correct: the critical path is the longest continuous path of dependent activities and determines the project duration; its activities have zero float, so any delay there pushes the completion date, whereas non-critical activities can slip within their available float without moving the finish. The critical path is the longest, not shortest, path. Critical activities have zero float, not the most. Float is scheduling slack, not profit.