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### Part A: General Construction & Trade Knowledge (Q1–Q85)
* *Q1 (Site Construction):** An excavation is 8 feet deep in Type B soil. According to OSHA 1926
Subpart P, without shoring, what is the maximum allowable slope (horizontal:vertical)?
A. 1:1 (45 degrees)
B. 1:1.5 (34 degrees)
C. 1:2 (26 degrees)
D. 1:0.5 (63 degrees)
* *[CORRECT]** A
*Rationale: OSHA 1926 Subpart P requires Type B soil to be sloped at 1:1. Distractor B applies
to Type A soil; C applies to Type C. Test tip: memorize Type A=1:1.5, Type B=1:1, Type C=1:2.*
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* *Q2 (Site Construction):** A contractor is preparing a site for construction. The soil
classification test reveals cohesive soil with unconfined compressive strength between 0.5 and
1.5 tons per square foot. What OSHA soil type is this?
A. Type A
B. Type B
C. Type C
D. Type D
* *[CORRECT]** B
*Rationale: OSHA 1926 Subpart P defines Type B soil as cohesive soil with unconfined
compressive strength between 0.5 and 1.5 tsf. Type A exceeds 1.5 tsf; Type C is less than 0.5
tsf. Test tip: Type B is the middle range—remember "B for Between."*
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* *Q3 (Site Construction):** During excavation, the competent person observes soil that is
granular and previously disturbed. What is the correct OSHA soil classification?
A. Type A
B. Type B
C. Type C
D. Stable rock
* *[CORRECT]** C
*Rationale: OSHA 1926 Subpart P classifies previously disturbed granular soil as Type C, the
least stable category. Type A and B require cohesive properties; stable rock requires no support.
Test tip: Previously disturbed = Type C automatically.*
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* *Q4 (Site Construction):** What is the minimum distance that spoil must be kept from the edge
of an excavation according to OSHA?
A. 1 foot
B. 2 feet
C. 3 feet
D. 4 feet
* *[CORRECT]** B
*Rationale: OSHA 1926.651(j)(2) requires spoil to be kept at least 2 feet from the excavation
edge to prevent surcharge loading. Distractor A is insufficient; C and D exceed the minimum
requirement. Test tip: "2 feet for spoil"—simple OSHA minimum.*
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* *Q5 (Site Construction):** A contractor needs to install a trench box in an excavation. At what
depth is a protective system required by OSHA for trenches?
A. 3 feet
B. 4 feet
C. 5 feet
D. 6 feet
* *[CORRECT]** C
*Rationale: OSHA 1926.650(b) defines a trench as a narrow excavation with depth greater than
width (not exceeding 15 feet), and protective systems are required at 5 feet or deeper. Distractor
B is a common misconception. Test tip: "5 feet = protect your feet."*
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,* *Q6 (Site Construction):** What is the maximum allowable slope for Type A soil in an
excavation without shoring, per OSHA 1926 Subpart P?
A. 1:0.5 (63 degrees)
B. 1:1 (45 degrees)
C. 1:1.5 (34 degrees)
D. 1:2 (26 degrees)
* *[CORRECT]** C
*Rationale: OSHA 1926 Subpart P Appendix B specifies Type A soil maximum slope of 1:1.5
(34°). Distractor B is Type B; D is Type C. Test tip: Type A is most stable = shallowest slope
angle = 1:1.5.*
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* *Q7 (Site Construction):** According to the IBC, what is the minimum slope required for
positive drainage away from a building foundation?
A. 1/4 inch per foot for first 5 feet
B. 1/2 inch per foot for first 10 feet
C. 1 inch per foot for first 5 feet
D. 2 inches per foot for first 10 feet
* *[CORRECT]** B
*Rationale: IBC Section 1805.4.3 requires a minimum slope of 1/2 inch per foot away from the
foundation for at least 10 feet. Distractor A is insufficient; C and D are excessive. Test tip: "Half
inch, ten feet"—foundation drainage standard.*
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* *Q8 (Site Construction):** A site plan shows an excavation in clay soil with groundwater
present. The competent person must perform inspections at what minimum frequency?
A. Once per shift
B. Once daily
C. At least daily and as needed
D. Weekly
* *[CORRECT]** C
*Rationale: OSHA 1926.651(k)(1) requires daily inspections by the competent person, with
additional inspections as conditions change (rain, vibration, etc.). Distractor B misses the "as
needed" requirement. Test tip: Daily minimum, more when conditions change.*
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* *Q9 (Site Construction):** What is the standard penetration test (SPT) blow count range
typically associated with medium dense sand?
, . 0–4
A
B. 4–10
C. 10–30
D. 30–50
* *[CORRECT]** C
*Rationale: Geotechnical standards classify medium dense sand at SPT N-values of 10–30
blows per foot. 0–4 is very loose; 4–10 is loose; 30–50 is dense. Test tip: Medium dense =
middle range = 10–30.*
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* *Q10 (Site Construction):** Erosion control measures must be in place before construction
begins if the site disturbs how many acres or more?
A. 0.5 acres
B. 1 acre
C. 2 acres
D. 5 acres
* *[CORRECT]** B
*Rationale: EPA NPDES stormwater regulations and most state erosion control laws require
measures for sites disturbing 1 acre or more. Distractor A is below the threshold; C and D are
incorrect. Test tip: "1 acre = action required."*
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* *Q11 (Concrete):** What is the minimum compressive strength required for normal-weight
concrete footings per the IBC?
A. 2,000 psi
B. 2,500 psi
C. 3,000 psi
D. 3,500 psi
* *[CORRECT]** B
*Rationale: IBC Section 1905.1.1 requires minimum 2,500 psi compressive strength for concrete
footings. Distractor A is below code; C and D are common but not minimums. Test tip: 2,500 psi
is the IBC baseline for structural concrete.*
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* *Q12 (Concrete):** A concrete mix has a water-cement ratio of 0.50. For exterior exposure in a
freeze-thaw climate, what is the maximum water-cement ratio per ACI 318?
A. 0.40
B. 0.45