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.