OSHA 30 CONSTRUCTION FINAL EXAM– QUESTIONS AND
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1. During a multi-employer construction site walkthrough, a general contractor notices
that a subcontractor has left an unprotected floor opening measuring 18 inches square on
the third-floor deck without any barricade or cover. According to OSHA multi-employer
citation policy, what is the primary responsibility of the general contractor in this scenario?
A. Only the subcontractor creating the hazard can be cited by OSHA compliance officers.
B. The general contractor can be cited if they had overall control of the worksite and the
authority to correct or require correction of the hazard.
C. The general contractor is exempt from liability because they did not create the floor opening
themselves.
D. The building owner assumes full legal responsibility for all subcontractor safety violations.
ANSWER: B. The general contractor can be cited if they had overall control of the worksite
and the authority to correct or require correction of the hazard.
Under OSHA's Multi-Employer Citation Policy, controlling employers who have general
supervisory authority over the worksite can be cited for hazards they should reasonably have
known about and corrected, even if they did not create or directly expose their own workers to
the hazard.
2. A construction crew is erecting a supported scaffold adjacent to a residential building.
The scaffold platform is 20 feet high and has a base dimension of 5 feet by 7 feet. To ensure
proper stability against tipping, what is the maximum allowable height-to-base ratio for
this scaffold without additional restraint?
A. 2 to 1
B. 3 to 1
C. 4 to 1
D. 6 to 1
ANSWER: C. 4 to 1
,OSHA standard 1926.451(c)(1) mandates that supported scaffolds must be restrained from
tipping by guying, tying, bracing, or equivalent means when the height-to-base ratio exceeds 4
to 1 to prevent structural collapse.
3. An excavation crew is digging a trench in Type C soil that is 14 feet deep. The competent
person on site wants to use sloping as the protective system to comply with OSHA
regulations. What is the maximum allowable slope angle (expressed as ratio of horizontal to
vertical) required for Type C soil in a short-term excavation?
A. 1/2 to 1 (63 degrees)
B. 1 to 1 (45 degrees)
C. 1 1/2 to 1 (34 degrees)
D. Vertical (90 degrees)
ANSWER: C. 1 1/2 to 1 (34 degrees)
For Type C soil, OSHA excavation standards require a maximum allowable slope of 1 1/2
horizontal to 1 vertical (a 34-degree angle) for excavations less than 20 feet deep to prevent
sidewall cave-ins.
4. A safety manager is reviewing personal fall arrest systems (PFAS) before workers begin
steel erection tasks at height. According to OSHA regulations, what is the maximum
arresting force permitted when a full-body harness is used in a PFAS?
A. 900 pounds
B. 1,800 pounds
C. 2,500 pounds
D. 5,000 pounds
ANSWER: B. 1,800 pounds
OSHA standard 1926.502 mandates that when a personal fall arrest system is used, it must be
rigged so that an employee cannot free fall more than 6 feet or come into contact with any
lower level, and the maximum arresting force on an employee using a full-body harness must
not exceed 1,800 pounds.
5. While inspecting a portable wooden ladder prior to use, an employee discovers that one
of the side rails has a longitudinal crack running along its length. What is the mandatory
action required by OSHA standards?
,A. Wrap the cracked rail securely with heavy-duty electrical tape.
B. Apply a structural wood glue and clamp it overnight before use.
C. Immediately tag the ladder out of service and remove it from the jobsite.
D. Limit ladder usage to workers weighing less than 150 pounds.**
ANSWER: C. Immediately tag the ladder out of service and remove it from the jobsite.
OSHA 1926.1053 requires that portable ladders with structural defects, such as broken or split
rails, must be immediately marked as defective or tagged with "Do Not Use" and withdrawn
from service to prevent worker injuries.
6. An electrician is working inside a commercial electrical panel and needs to verify that a
circuit is completely de-energized before performing maintenance. Which testing method
complies with safe work practices?
A. Trusting that the circuit breaker handle in the "OFF" position guarantees zero energy.
B. Testing the circuit with a properly rated and verified multimeter using a live-dead-live testing
sequence.
C. Relying on visual inspection of the wire insulation condition.
D. Asking a coworker if they flipped the correct switch earlier in the day.**
ANSWER: B. Testing the circuit with a properly rated and verified multimeter using a live-
dead-live testing sequence.
Safe electrical work practices require verifying zero energy state using a calibrated tester,
testing it on a known live source before testing the target circuit, and re-testing it afterward
(live-dead-live) to confirm meter functionality.
7. During demolition work on a multistory commercial building, workers need to drop
debris through a floor opening to the ground level. According to OSHA standards, when
must chutes be utilized for debris drops?
A. Whenever debris is dropped more than 10 feet.
B. When debris is dropped through holes in the floor without the use of chutes, an enclosed
chute must be used if the drop distance exceeds 20 feet.
C. Chutes are strictly optional if warning signs are posted around the drop zone.
D. Chutes are only required when dropping hazardous materials like asbestos.**
, ANSWER: B. When debris is dropped through holes in the floor without the use of chutes,
an enclosed chute must be used if the drop distance exceeds 20 feet.
OSHA 1926.850(h) specifies that when debris is dropped through openings in the floors
without the use of chutes, the area onto which the material is dropped shall be completely
enclosed with barricades, and chutes must be used when drop heights exceed 20 feet.
8. A project superintendent is establishing a temporary traffic control zone for road
construction on a federal highway. What is the primary reference manual that OSHA
incorporates by reference for traffic control sign placement and work zone safety?
A. The National Electrical Code (NEC)
B. The Manual on Uniform Traffic Control Devices (MUTCD)
C. The International Building Code (IBC)
D. The American Society of Civil Engineers (ASCE) Standards**
ANSWER: B. The Manual on Uniform Traffic Control Devices (MUTCD)
OSHA construction standards incorporate the MUTCD as the national standard for
designing, implementing, and maintaining traffic control devices in highway and road
construction work zones.
9. A steel erector is walking a structural beam at an elevation of 28 feet above the lower
level. Under OSHA Subpart R (Steel Erection), at what height is fall protection mandatory
for connectors working on beams?
A. 6 feet
B. 15 feet
C. 30 feet
D. 40 feet**
ANSWER: C. 30 feet
Under OSHA 1926.760(b)(1), connectors engaged in steel erection activities are permitted to
work without conventional fall protection up to a height of 30 feet (or two stories, whichever is
less). For all other workers, standard fall protection kicks in at 15 feet in steel erection.
10. An employer is setting up a hazard communication program for a construction site
where workers handle various chemical solvents and paints. Under OSHA's Hazard
ANSWERS | VERIFIED AND WELL DETAILED ANSWERS PLUS
RATIONALES | GUARANTEED PASS | LATEST EXAM UPDATE |
EXAM PREP | STUDY GUIDE | PRACTICE TEST| DOWNLOAD
INSTANT PDF
1. During a multi-employer construction site walkthrough, a general contractor notices
that a subcontractor has left an unprotected floor opening measuring 18 inches square on
the third-floor deck without any barricade or cover. According to OSHA multi-employer
citation policy, what is the primary responsibility of the general contractor in this scenario?
A. Only the subcontractor creating the hazard can be cited by OSHA compliance officers.
B. The general contractor can be cited if they had overall control of the worksite and the
authority to correct or require correction of the hazard.
C. The general contractor is exempt from liability because they did not create the floor opening
themselves.
D. The building owner assumes full legal responsibility for all subcontractor safety violations.
ANSWER: B. The general contractor can be cited if they had overall control of the worksite
and the authority to correct or require correction of the hazard.
Under OSHA's Multi-Employer Citation Policy, controlling employers who have general
supervisory authority over the worksite can be cited for hazards they should reasonably have
known about and corrected, even if they did not create or directly expose their own workers to
the hazard.
2. A construction crew is erecting a supported scaffold adjacent to a residential building.
The scaffold platform is 20 feet high and has a base dimension of 5 feet by 7 feet. To ensure
proper stability against tipping, what is the maximum allowable height-to-base ratio for
this scaffold without additional restraint?
A. 2 to 1
B. 3 to 1
C. 4 to 1
D. 6 to 1
ANSWER: C. 4 to 1
,OSHA standard 1926.451(c)(1) mandates that supported scaffolds must be restrained from
tipping by guying, tying, bracing, or equivalent means when the height-to-base ratio exceeds 4
to 1 to prevent structural collapse.
3. An excavation crew is digging a trench in Type C soil that is 14 feet deep. The competent
person on site wants to use sloping as the protective system to comply with OSHA
regulations. What is the maximum allowable slope angle (expressed as ratio of horizontal to
vertical) required for Type C soil in a short-term excavation?
A. 1/2 to 1 (63 degrees)
B. 1 to 1 (45 degrees)
C. 1 1/2 to 1 (34 degrees)
D. Vertical (90 degrees)
ANSWER: C. 1 1/2 to 1 (34 degrees)
For Type C soil, OSHA excavation standards require a maximum allowable slope of 1 1/2
horizontal to 1 vertical (a 34-degree angle) for excavations less than 20 feet deep to prevent
sidewall cave-ins.
4. A safety manager is reviewing personal fall arrest systems (PFAS) before workers begin
steel erection tasks at height. According to OSHA regulations, what is the maximum
arresting force permitted when a full-body harness is used in a PFAS?
A. 900 pounds
B. 1,800 pounds
C. 2,500 pounds
D. 5,000 pounds
ANSWER: B. 1,800 pounds
OSHA standard 1926.502 mandates that when a personal fall arrest system is used, it must be
rigged so that an employee cannot free fall more than 6 feet or come into contact with any
lower level, and the maximum arresting force on an employee using a full-body harness must
not exceed 1,800 pounds.
5. While inspecting a portable wooden ladder prior to use, an employee discovers that one
of the side rails has a longitudinal crack running along its length. What is the mandatory
action required by OSHA standards?
,A. Wrap the cracked rail securely with heavy-duty electrical tape.
B. Apply a structural wood glue and clamp it overnight before use.
C. Immediately tag the ladder out of service and remove it from the jobsite.
D. Limit ladder usage to workers weighing less than 150 pounds.**
ANSWER: C. Immediately tag the ladder out of service and remove it from the jobsite.
OSHA 1926.1053 requires that portable ladders with structural defects, such as broken or split
rails, must be immediately marked as defective or tagged with "Do Not Use" and withdrawn
from service to prevent worker injuries.
6. An electrician is working inside a commercial electrical panel and needs to verify that a
circuit is completely de-energized before performing maintenance. Which testing method
complies with safe work practices?
A. Trusting that the circuit breaker handle in the "OFF" position guarantees zero energy.
B. Testing the circuit with a properly rated and verified multimeter using a live-dead-live testing
sequence.
C. Relying on visual inspection of the wire insulation condition.
D. Asking a coworker if they flipped the correct switch earlier in the day.**
ANSWER: B. Testing the circuit with a properly rated and verified multimeter using a live-
dead-live testing sequence.
Safe electrical work practices require verifying zero energy state using a calibrated tester,
testing it on a known live source before testing the target circuit, and re-testing it afterward
(live-dead-live) to confirm meter functionality.
7. During demolition work on a multistory commercial building, workers need to drop
debris through a floor opening to the ground level. According to OSHA standards, when
must chutes be utilized for debris drops?
A. Whenever debris is dropped more than 10 feet.
B. When debris is dropped through holes in the floor without the use of chutes, an enclosed
chute must be used if the drop distance exceeds 20 feet.
C. Chutes are strictly optional if warning signs are posted around the drop zone.
D. Chutes are only required when dropping hazardous materials like asbestos.**
, ANSWER: B. When debris is dropped through holes in the floor without the use of chutes,
an enclosed chute must be used if the drop distance exceeds 20 feet.
OSHA 1926.850(h) specifies that when debris is dropped through openings in the floors
without the use of chutes, the area onto which the material is dropped shall be completely
enclosed with barricades, and chutes must be used when drop heights exceed 20 feet.
8. A project superintendent is establishing a temporary traffic control zone for road
construction on a federal highway. What is the primary reference manual that OSHA
incorporates by reference for traffic control sign placement and work zone safety?
A. The National Electrical Code (NEC)
B. The Manual on Uniform Traffic Control Devices (MUTCD)
C. The International Building Code (IBC)
D. The American Society of Civil Engineers (ASCE) Standards**
ANSWER: B. The Manual on Uniform Traffic Control Devices (MUTCD)
OSHA construction standards incorporate the MUTCD as the national standard for
designing, implementing, and maintaining traffic control devices in highway and road
construction work zones.
9. A steel erector is walking a structural beam at an elevation of 28 feet above the lower
level. Under OSHA Subpart R (Steel Erection), at what height is fall protection mandatory
for connectors working on beams?
A. 6 feet
B. 15 feet
C. 30 feet
D. 40 feet**
ANSWER: C. 30 feet
Under OSHA 1926.760(b)(1), connectors engaged in steel erection activities are permitted to
work without conventional fall protection up to a height of 30 feet (or two stories, whichever is
less). For all other workers, standard fall protection kicks in at 15 feet in steel erection.
10. An employer is setting up a hazard communication program for a construction site
where workers handle various chemical solvents and paints. Under OSHA's Hazard
