NCCER Ironworker Exam Prep:
Essential Questions & Answers with
Detailed Rationales
Section 1: Personal Protective Equipment and Safety (Questions 1-20)
1. What is the primary purpose of wearing a hard hat on a job site?
A) To keep your head warm
B) To protect the head from falling objects and impacts
C) To look professional
D) To hold safety glasses in place
Answer: B
Rationale: Hard hats are designed to protect workers from head injuries
caused by falling objects, bumps, and electrical hazards. They are a critical
component of PPE required by OSHA .
2. Which of the following is required PPE for ironworkers?
A) Steel-toed boots, hard hat, safety glasses
B) Baseball cap
C) Tennis shoes
D) Cotton gloves only
Answer: A
,Rationale: Ironworkers must wear steel-toed boots for foot protection, a
hard hat for head protection, and safety glasses for eye protection. These
are minimum OSHA-required PPE items .
3. What is the OSHA requirement regarding fall protection on steel
erection sites?
A) Fall protection is optional
B) Fall protection is required at heights of 6 feet or more
C) Fall protection is only required above 25 feet
D) Fall protection is not required for ironworkers
Answer: B
Rationale: OSHA requires fall protection for workers at heights of 6 feet or
more in the construction industry. This includes guardrails, safety nets, or
personal fall arrest systems .
4. Which personal protective equipment (PPE) is required when
working at heights above 6 feet?
A) Safety glasses
B) Hard hat
C) Fall arrest system
D) Steel-toed boots
Answer: C
,Rationale: OSHA requires a fall arrest system for workers at heights above
6 feet to prevent serious injuries or fatalities from falls. Safety glasses, hard
hats, and steel-toed boots are also required but do not specifically address
fall prevention .
5. What is the role of a competent person on a jobsite?
A) Identifying hazards and taking corrective actions
B) Supervising lunch breaks
C) Painting walls
D) Operating only cranes
Answer: A
Rationale: A competent person is someone who can identify existing and
predictable hazards and has the authority to take prompt corrective
measures. This is an OSHA-defined role critical for jobsite safety .
6. What is the minimum distance a worker must stay from power lines
rated 50kV or higher?
A) 5 feet
B) 10 feet
C) 15 feet
D) 20 feet
Answer: B
, Rationale: OSHA requires a minimum of 10 feet clearance from power lines
rated 50 kV or higher to prevent electrical hazards. Greater distances are
required for higher voltages .
7. What is the minimum clearance distance when using a torch near
combustible materials?
A) 5 feet
B) 10 feet
C) 15 feet
D) 20 feet
Answer: B
Rationale: OSHA recommends a minimum of 10 feet from combustible
materials when using an oxy-fuel torch to prevent fire hazards .
8. What does OSHA require regarding fall protection on steel erection
sites?
A) Fall protection is optional
B) Fall protection is required at heights of 6 feet or more
C) Fall protection is only required above 25 feet
D) Fall protection is not required for ironworkers
Answer: B
Essential Questions & Answers with
Detailed Rationales
Section 1: Personal Protective Equipment and Safety (Questions 1-20)
1. What is the primary purpose of wearing a hard hat on a job site?
A) To keep your head warm
B) To protect the head from falling objects and impacts
C) To look professional
D) To hold safety glasses in place
Answer: B
Rationale: Hard hats are designed to protect workers from head injuries
caused by falling objects, bumps, and electrical hazards. They are a critical
component of PPE required by OSHA .
2. Which of the following is required PPE for ironworkers?
A) Steel-toed boots, hard hat, safety glasses
B) Baseball cap
C) Tennis shoes
D) Cotton gloves only
Answer: A
,Rationale: Ironworkers must wear steel-toed boots for foot protection, a
hard hat for head protection, and safety glasses for eye protection. These
are minimum OSHA-required PPE items .
3. What is the OSHA requirement regarding fall protection on steel
erection sites?
A) Fall protection is optional
B) Fall protection is required at heights of 6 feet or more
C) Fall protection is only required above 25 feet
D) Fall protection is not required for ironworkers
Answer: B
Rationale: OSHA requires fall protection for workers at heights of 6 feet or
more in the construction industry. This includes guardrails, safety nets, or
personal fall arrest systems .
4. Which personal protective equipment (PPE) is required when
working at heights above 6 feet?
A) Safety glasses
B) Hard hat
C) Fall arrest system
D) Steel-toed boots
Answer: C
,Rationale: OSHA requires a fall arrest system for workers at heights above
6 feet to prevent serious injuries or fatalities from falls. Safety glasses, hard
hats, and steel-toed boots are also required but do not specifically address
fall prevention .
5. What is the role of a competent person on a jobsite?
A) Identifying hazards and taking corrective actions
B) Supervising lunch breaks
C) Painting walls
D) Operating only cranes
Answer: A
Rationale: A competent person is someone who can identify existing and
predictable hazards and has the authority to take prompt corrective
measures. This is an OSHA-defined role critical for jobsite safety .
6. What is the minimum distance a worker must stay from power lines
rated 50kV or higher?
A) 5 feet
B) 10 feet
C) 15 feet
D) 20 feet
Answer: B
, Rationale: OSHA requires a minimum of 10 feet clearance from power lines
rated 50 kV or higher to prevent electrical hazards. Greater distances are
required for higher voltages .
7. What is the minimum clearance distance when using a torch near
combustible materials?
A) 5 feet
B) 10 feet
C) 15 feet
D) 20 feet
Answer: B
Rationale: OSHA recommends a minimum of 10 feet from combustible
materials when using an oxy-fuel torch to prevent fire hazards .
8. What does OSHA require regarding fall protection on steel erection
sites?
A) Fall protection is optional
B) Fall protection is required at heights of 6 feet or more
C) Fall protection is only required above 25 feet
D) Fall protection is not required for ironworkers
Answer: B
