Page | 1
Owner Builder Exam Questions with
Detailed Verified Answers
Question:At what depth of trench is shoring require / At what depth of an
excavation is shoring required?
Ans: 1.2 M or 4 Feet
Question: How can shoring be done past 4 feet?
Ans: This can be done with purpose-built shoring, or, it is acceptable to
use plywood if it is properly constructed.
Question: Which of the following is not an acceptable method for
determining the correct grading for a trench?
Ans: experienced contractor says it's ok
Question: Before a worker enters any excavation over 1.2 m (4 ft) in depth or,
while in the excavation,
approaches closer to the side or bank than a distance equal to the depth of the
excavation, the employer must ensure that the
sides of the excavation are
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Ans: (a) sloped as specified in writing by a qualified registered professional,
(b) sloped at angles, dependent on soil conditions, which will ensure stable
faces, but in no case, may the slope or combination
of vertical cut and slope exceed that shown in Figure 20-1,
(c) benched as shown in Figure 20-2,
(d) supported as specified in writing by a professional engineer,
(e) supported in accordance with the minimum requirements of section 20.85,
or
(f) supported by manufactured or prefabricated trench boxes or shoring cages,
or other effective means.
Question: Which best describes the design principle of rain water deflection?
Ans: Design and construction which stops water from ever entering
Question: What lighting certifications are required in Canada?
Ans: CSA safety certification
Question: What grit of sandpaper would get smoothest result? 150-180 etc.
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Ans: The higher the grade, the smoother the finish. When finishing a surface,
you typically start with a low grit and
work up to a high grit.
Question: What is the maximum rise in a flight of stairs?
a. The vertical height any flight stairs
Ans: The vertical height shall not exceed 3.7 M
Question: What is the minimum distance that a ladder must extend above a
parapet wall or landing?
Ans: 3 feet
Question: If you have a 4m ladder, how far from the wall does the base of the
ladder have to be?
Ans: 74 degrees or 4:1 ratio. So 4 m ladder, needs to be 1 m away.
Question: What heights are end dams to be on window and door flashings?
Ans: 25 mm / 1 inch (from BCBC)
Question: When to call for inspections and how to make them efficient as
possible?
Ans: Group together when possible and call when work is complete
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Question: When is an HRV required?
Ans: Almost always:
"Effective December ϭε, ϮϬϭκ residential dwelling units, such as houses,
apartments and secondary suites will be required to have
a principal ventilation system that exhausts air from bathrooms and kitchens
and supplies fresh air to bedrooms and living areas
[ε.ϯϮ.ϯ.ϯ."
"Some small dwelling units in mild climates are permitted to supply fresh air
through passive vents [9.32.3.4.(6)], but for most
dwelling units exhaust and supply will require a mechanical fan"
Question: What can you build under the owner-builder HPO process?
Owner Builder Exam Questions with
Detailed Verified Answers
Question:At what depth of trench is shoring require / At what depth of an
excavation is shoring required?
Ans: 1.2 M or 4 Feet
Question: How can shoring be done past 4 feet?
Ans: This can be done with purpose-built shoring, or, it is acceptable to
use plywood if it is properly constructed.
Question: Which of the following is not an acceptable method for
determining the correct grading for a trench?
Ans: experienced contractor says it's ok
Question: Before a worker enters any excavation over 1.2 m (4 ft) in depth or,
while in the excavation,
approaches closer to the side or bank than a distance equal to the depth of the
excavation, the employer must ensure that the
sides of the excavation are
, Page | 2
Ans: (a) sloped as specified in writing by a qualified registered professional,
(b) sloped at angles, dependent on soil conditions, which will ensure stable
faces, but in no case, may the slope or combination
of vertical cut and slope exceed that shown in Figure 20-1,
(c) benched as shown in Figure 20-2,
(d) supported as specified in writing by a professional engineer,
(e) supported in accordance with the minimum requirements of section 20.85,
or
(f) supported by manufactured or prefabricated trench boxes or shoring cages,
or other effective means.
Question: Which best describes the design principle of rain water deflection?
Ans: Design and construction which stops water from ever entering
Question: What lighting certifications are required in Canada?
Ans: CSA safety certification
Question: What grit of sandpaper would get smoothest result? 150-180 etc.
, Page | 3
Ans: The higher the grade, the smoother the finish. When finishing a surface,
you typically start with a low grit and
work up to a high grit.
Question: What is the maximum rise in a flight of stairs?
a. The vertical height any flight stairs
Ans: The vertical height shall not exceed 3.7 M
Question: What is the minimum distance that a ladder must extend above a
parapet wall or landing?
Ans: 3 feet
Question: If you have a 4m ladder, how far from the wall does the base of the
ladder have to be?
Ans: 74 degrees or 4:1 ratio. So 4 m ladder, needs to be 1 m away.
Question: What heights are end dams to be on window and door flashings?
Ans: 25 mm / 1 inch (from BCBC)
Question: When to call for inspections and how to make them efficient as
possible?
Ans: Group together when possible and call when work is complete
, Page | 4
Question: When is an HRV required?
Ans: Almost always:
"Effective December ϭε, ϮϬϭκ residential dwelling units, such as houses,
apartments and secondary suites will be required to have
a principal ventilation system that exhausts air from bathrooms and kitchens
and supplies fresh air to bedrooms and living areas
[ε.ϯϮ.ϯ.ϯ."
"Some small dwelling units in mild climates are permitted to supply fresh air
through passive vents [9.32.3.4.(6)], but for most
dwelling units exhaust and supply will require a mechanical fan"
Question: What can you build under the owner-builder HPO process?
