NWSA TTT-1 Exam – Comprehensive
Practice Test (2026 Update).
**1. A Tower Technician 1 is about to climb a 200-foot self-support
tower. Which of the following is the primary fall protection system
required by OSHA 1910.268?**
- A) Safety net system
- B) Guardrail system
- C) Personal fall arrest system (PFAS)
- D) Positioning belt only
**Correct Answer: C**
**Rationale:** OSHA 1910.268(b)(1)(i) requires a PFAS (full-body
harness with shock-absorbing lanyard or SRL) when climbing towers.
Positioning belts are for work positioning, not fall arrest .
**2. What is the maximum free-fall distance allowed by OSHA for a
personal fall arrest system?**
- A) 2 feet
- B) 4 feet
- C) 6 feet
- D) 10 feet
,**Correct Answer: C**
**Rationale:** OSHA limits free fall to 6 feet. Longer free falls generate
excessive arresting forces (exceeding 1,800 lbs), which can cause severe
injury or death .
**3. You are inspecting your full-body harness and notice a 1-inch cut in
the webbing near the dorsal D-ring. What is the correct action?**
- A) Tape it with electrical tape
- B) Sew it with heavy thread
- C) Remove from service immediately and tag "Do Not Use"
- D) Use it only for rescue practice
**Correct Answer: C**
**Rationale:** Any cut, tear, or abrasion exposing fibers on load-
bearing webbing (especially near D-rings) critically compromises tensile
strength and requires immediate removal from service .
**4. What is the most force a full-body harness may apply to the
human body during a fall arrest event?**
- A) 900 lbs
- B) 1,800 lbs
- C) 2,500 lbs
- D) 5,000 lbs
,**Correct Answer: B**
**Rationale:** The maximum arresting force for a worker wearing a
full-body harness is capped at 1,800 lbs (8 kN) to prevent internal
trauma .
**5. The dorsal D-ring on a full-body harness is located:**
- A) On the chest
- B) On the waist (side)
- C) Between the shoulder blades (on the back)
- D) At the sternum
**Correct Answer: C**
**Rationale:** The dorsal D-ring must be located between the
shoulder blades to keep the worker upright during a fall. A lower
placement causes spinal rotation and injury .
**6. What is the minimum breaking strength required for an anchor
point used for fall arrest (non-engineered)?**
- A) 1,800 lbs
- B) 3,000 lbs
- C) 5,000 lbs
- D) 10,000 lbs
, **Correct Answer: C**
**Rationale:** Non-engineered fall arrest anchors must have a
minimum breaking strength of 5,000 lbs per attached worker, or be
designed by a qualified person with a safety factor of at least 2 .
**7. When using a vertical safety climb system (cable or rigid rail), the
climber must use a:**
- A) Fixed length lanyard
- B) Rope grab or cable sleeve that moves freely but locks in a fall
- C) Nylon rope tied with a bowline
- D) Positioning belt only
**Correct Answer: B**
**Rationale:** A cable-style vertical lifeline system allows continuous
100% tie-off protection while climbing. The sleeve or grab must
automatically lock onto the cable during a fall .
**8. "100% Tie-Off" means:**
- A) You are tied off 100% of the time you are awake.
- B) You are attached to an anchor 100% of the time you are exposed to
a fall hazard.
- C) Your equipment is 100% inspected.
- D) The anchor has 100% safety factor.
Practice Test (2026 Update).
**1. A Tower Technician 1 is about to climb a 200-foot self-support
tower. Which of the following is the primary fall protection system
required by OSHA 1910.268?**
- A) Safety net system
- B) Guardrail system
- C) Personal fall arrest system (PFAS)
- D) Positioning belt only
**Correct Answer: C**
**Rationale:** OSHA 1910.268(b)(1)(i) requires a PFAS (full-body
harness with shock-absorbing lanyard or SRL) when climbing towers.
Positioning belts are for work positioning, not fall arrest .
**2. What is the maximum free-fall distance allowed by OSHA for a
personal fall arrest system?**
- A) 2 feet
- B) 4 feet
- C) 6 feet
- D) 10 feet
,**Correct Answer: C**
**Rationale:** OSHA limits free fall to 6 feet. Longer free falls generate
excessive arresting forces (exceeding 1,800 lbs), which can cause severe
injury or death .
**3. You are inspecting your full-body harness and notice a 1-inch cut in
the webbing near the dorsal D-ring. What is the correct action?**
- A) Tape it with electrical tape
- B) Sew it with heavy thread
- C) Remove from service immediately and tag "Do Not Use"
- D) Use it only for rescue practice
**Correct Answer: C**
**Rationale:** Any cut, tear, or abrasion exposing fibers on load-
bearing webbing (especially near D-rings) critically compromises tensile
strength and requires immediate removal from service .
**4. What is the most force a full-body harness may apply to the
human body during a fall arrest event?**
- A) 900 lbs
- B) 1,800 lbs
- C) 2,500 lbs
- D) 5,000 lbs
,**Correct Answer: B**
**Rationale:** The maximum arresting force for a worker wearing a
full-body harness is capped at 1,800 lbs (8 kN) to prevent internal
trauma .
**5. The dorsal D-ring on a full-body harness is located:**
- A) On the chest
- B) On the waist (side)
- C) Between the shoulder blades (on the back)
- D) At the sternum
**Correct Answer: C**
**Rationale:** The dorsal D-ring must be located between the
shoulder blades to keep the worker upright during a fall. A lower
placement causes spinal rotation and injury .
**6. What is the minimum breaking strength required for an anchor
point used for fall arrest (non-engineered)?**
- A) 1,800 lbs
- B) 3,000 lbs
- C) 5,000 lbs
- D) 10,000 lbs
, **Correct Answer: C**
**Rationale:** Non-engineered fall arrest anchors must have a
minimum breaking strength of 5,000 lbs per attached worker, or be
designed by a qualified person with a safety factor of at least 2 .
**7. When using a vertical safety climb system (cable or rigid rail), the
climber must use a:**
- A) Fixed length lanyard
- B) Rope grab or cable sleeve that moves freely but locks in a fall
- C) Nylon rope tied with a bowline
- D) Positioning belt only
**Correct Answer: B**
**Rationale:** A cable-style vertical lifeline system allows continuous
100% tie-off protection while climbing. The sleeve or grab must
automatically lock onto the cable during a fall .
**8. "100% Tie-Off" means:**
- A) You are tied off 100% of the time you are awake.
- B) You are attached to an anchor 100% of the time you are exposed to
a fall hazard.
- C) Your equipment is 100% inspected.
- D) The anchor has 100% safety factor.
