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Mock paper #1

NASCLA Accredited Examination for Commercial General Building Contractors

A full paper drawn to the blueprint. Answers and worked explanations are at the back of this file.

Questions
115
Time
330minutes
Mark
70%to pass
Paper
#1of 5

Single-user licence. You may print this file and write on it. You may not redistribute, resell or post it. © Sitonce 2026.

Before you start

Sit this the way you will sit the real one. A mock done in pieces over three evenings measures your notes, not your recall.

Questions
115
Minutes
330
Per question
172s
Started at
 
  1. Set a timer for 330 minutes and do not stop it. Running over is the commonest way a prepared candidate fails, and the only place you can find that out safely is here.
  2. Mark one answer for each question on the answer sheet.
  3. Answer every question. There is no penalty for a wrong answer. A blank is a guaranteed zero and a guess is not.
  4. Flag anything you are unsure of as you go. When you mark the paper, a question you flagged and got right is worth as much of your attention as one you got wrong - you do not yet know it, you guessed it.
  5. When the timer runs out, turn to the Answers section at the back of this file. Mark the paper against the quick-reference key first, fill in the score table, and only then read the worked explanations.

What this paper covers

AreaQuestionsShare
Procurement and Contracting Requirements3127%
General Requirements2522%
Site Construction1513%
Concrete65%
Mechanical and Plumbing Systems65%
Metals65%
Finishes54%
Thermal and Moisture Protection54%
Wood54%
Doors, Windows and Glazing43%
Masonry43%
Electrical Systems33%
Total115100%

Pass mark vs pass rate

The pass mark is 81 correct out of 115 scored questions, which PSI publishes. Any pass-rate figure quoted for this exam is an estimate - neither NASCLA nor PSI publishes one.

Answer sheet - paper #1

Circle one letter for each question.

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Paper #1

115 questions. 330 minutes.

1

What must an employee be trained to recognise before working on a scaffold?

  1. AThe hazards of the scaffold in use and the procedures for controlling them
  2. BThe manufacturer's assembly instructions for that model of scaffold
  3. CThe full text of the scaffold standard and its appendices
  4. DThe rescue procedures used if a worker falls from the platform
2

What is a cleanout in grouted masonry construction?

  1. AThe drain provided at the bottom of the cavity for water
  2. BAn opening left for inspecting the reinforcement after grouting
  3. CThe recess into which the control joint sealant is applied
  4. DAn opening at the base of a cell for removing debris before grouting
3

Which location requires safety glazing?

  1. AIn a door, and in a panel adjacent to a door within stated dimensions
  2. BIn any window on the ground floor of the building
  3. CIn any window facing a public street or right of way, whatever its height above the floor
  4. DIn any window larger than nine square feet in area

Worked explanations

The paper carries one for every question, at the back. These are the three above.

Q1 A Ch. 2: General Requirements

Answer: A - The hazards of the scaffold in use and the procedures for controlling them

Because Each employee who works on a scaffold must be trained by a qualified person to recognise the hazards associated with the type of scaffold being used - electrical, fall and falling object hazards - and the procedures for controlling them, including load limits. 29 CFR 1926.454

Where the other options lead

  • B.Narrows it to assembly. Erectors are trained separately by a competent person on erection and dismantling.
  • C.Requires the whole standard. Training covers hazards and procedures relevant to the work, not the regulation verbatim.
  • D.Narrows it to rescue. Rescue is required where fall arrest is used, but the training requirement is broader.
Q2 D Ch. 10: Masonry

Answer: D - An opening at the base of a cell for removing debris before grouting

Because Mortar droppings collect at the bottom of a cell and would prevent the grout reaching the reinforcement. Cleanout openings at the base let the cell be cleared and inspected, then are closed before grouting. They are required above a stated grout pour height. TMS 602 art. 3.2

Where the other options lead

  • A.Confuses it with a weep. Weeps drain a cavity; cleanouts serve grouted cells.
  • B.Reverses the sequence. Inspection happens before grouting, because afterwards nothing can be seen or corrected.
  • C.Confuses it with a joint. Control joints are a separate detail.
Q3 A Ch. 11: Doors, Windows and Glazing

Answer: A - In a door, and in a panel adjacent to a door within stated dimensions

Because Safety glazing is required at hazardous locations: in doors, adjacent to doors within a stated distance and height, in and around wet areas such as tubs and showers, at low glazing meeting the size and height criteria, and along stairs and ramps. IBC ch. 24

Where the other options lead

  • B.Uses the storey. Ground floor location is not one of the hazardous location criteria.
  • C.Uses the street. What lies outside is not a factor in the hazardous location list.
  • D.Uses size alone. Size is one criterion in a set that also includes height above the floor and proximity to a walking surface.

The rest of this mock paper comes with the course

NASCLA Commercial GB: the whole syllabus taught, the questions that test it, 5 timed mocks, and all 6 PDFs to print.