NWSA TOWER TECHNICIAN TRAINING LEVEL 2 (TT2)
CERTIFICATION EXAMINATION COMPLETE QUESTIONS
AND DETAILED SOLUTIONS — LATEST UPDATE
SECTION 1: ADVANCED CLIMBING & RESCUES
(Self-Rescue, Pick-Offs, Suspension Trauma — 15 Questions)
Q1: A TT2 technician must perform a locked-out tag-out on a GE 1.5 MW wind
turbine gearbox for a filter change. After opening the main disconnect and
applying the lock, what is the NEXT required step per NWSA LOTO protocol for
multi-energy sources?
A. Insert a tag stating "DO NOT OPERATE" with name and date
B. Test for zero energy state using a calibrated meter
C. Remove the fuses from the auxiliary control cabinet
D. Place the work order tag on the nacelle entry door
Correct Answer: B
Rationale: Correct because NWSA TT2 LOTO protocol requires verification of
zero energy state after isolation BEFORE applying tags or proceeding with
maintenance to prevent stored energy release. Stored energy in capacitors,
rotating masses, or hydraulic accumulators can cause serious injury if not
verified. Per NWSA TT2 standard, the six-step LOTO sequence is: (1) Notify
affected personnel, (2) Shut down equipment, (3) Isolate energy sources, (4)
Apply locks and tags, (5) Verify zero energy state, (6) Perform work. Testing with a
calibrated meter confirms de-energization.
Q2: During a blade inspection at 80 meters, a technician's fall arrest lanyard
shock absorber deploys after a 4-foot fall. Per NWSA TT2 standard, what is the
MAXIMUM allowable elongation of the shock-absorbing lanyard after
deployment?
A. 24 inches
B. 42 inches
C. 48 inches
D. 60 inches
,Correct Answer: B
Rationale: Correct because per NWSA TT2 standard and ANSI Z359.13, a shock-
absorbing lanyard must limit maximum arresting force to 1,800 lbs and elongate
no more than 42 inches (3.5 feet) during deployment. The priority is controlling
deceleration distance to prevent secondary impact with lower structures while
maintaining force below injury thresholds.
Q3: A technician is suspended in a full-body harness after a fall arrest event at
height. Which symptom indicates the ONSET of suspension trauma (orthostatic
intolerance) and requires immediate rescue action?
A. Mild discomfort in the shoulder straps
B. Nausea, dizziness, and tingling in the extremities
C. Slight rope burn on the hands
D. Increased heart rate from adrenaline only
Correct Answer: B
Rationale: Correct because per NWSA TT2 standard, suspension trauma
progresses rapidly when venous pooling occurs in the legs due to harness
compression of femoral vessels. Nausea, dizziness, and tingling indicate
compromised circulation and imminent loss of consciousness. The priority is
rescue within 5–15 minutes; delayed rescue can result in reflow syndrome and
cardiac arrest upon horizontal positioning.
Q4: During a pick-off rescue of an unconscious suspended worker, the rescuer
must transfer the victim's load from the damaged system to the rescue system.
What is the CORRECT sequence per NWSA TT2 rescue protocol?
A. Attach rescue system, cut victim's lanyard, lower victim
B. Attach rescue system, transfer load, verify security, disconnect victim's system
C. Cut victim's lanyard first, then attach rescue system quickly
D. Lower victim on damaged system while attaching backup
Correct Answer: B
Rationale: Correct because per NWSA TT2 standard, the priority is maintaining
continuous load support during transfer. The rescuer must first establish an
independent anchor and attachment point, transfer the victim's weight to the
rescue system, verify all connections are secure and gates locked, then
,disconnect the compromised system. Cutting or removing the original system
before transfer confirmation risks catastrophic secondary fall.
Q5: A TT2 technician is performing a self-rescue from a jammed ascender on a
fixed ladder. The technician has a foot loop and hand ascender available. What is
the CORRECT mechanical advantage system to create for ascending past the
obstruction?
A. 1:1 direct pull on the rope
B. 2:1 simple haul system using the foot loop
C. 3:1 Z-rig with pulley and prusik
D. 4:1 compound system with two pulleys
Correct Answer: B
Rationale: Correct because per NWSA TT2 standard, a 2:1 simple haul system
using a foot loop attached to the rope above the obstruction provides adequate
mechanical advantage for a single technician to overcome friction and body
weight. The priority is simplicity and speed in an emergency; complex systems
introduce failure points and require more equipment than typically carried during
routine climbs.
Q6: A rescue team must evacuate an injured technician from the nacelle of a
Siemens 2.3 MW turbine during high winds. The nacelle door is a leading edge
with a 6-foot drop to the roof below. What is the PRIMARY hazard control for
leading edge rescue operations?
A. Positioning the rescue litter parallel to the edge
B. Using a self-retracting lanyard (SRL) with leading edge certification
C. Deploying a temporary guardrail system before edge approach
D. Rappelling directly from the nacelle without edge protection
Correct Answer: B
Rationale: Correct because per NWSA TT2 standard, leading edges present
severe fall hazards where standard SRLs may fail due to edge abrasion and
dynamic loading. The priority is using an SRL specifically rated and certified for
leading edge applications, which incorporates enhanced webbing, shock
absorption, and edge-radius testing. Standard SRLs without leading edge rating
are prohibited for this application.
, Q7: A technician experiences suspension trauma symptoms after 8 minutes post-
fall arrest. The rescue team has reached the victim. What is the CORRECT victim
positioning protocol per NWSA TT2 standard?
A. Immediately lay the victim flat on their back
B. Maintain the victim in a seated or semi-recumbent position for 30–45 minutes
C. Elevate the victim's legs above heart level
D. Place the victim in the recovery position and administer fluids
Correct Answer: B
Rationale: Correct because per NWSA TT2 standard, sudden horizontal
positioning after suspension trauma can cause toxic blood return to the heart
(reflow syndrome), triggering cardiac arrest. The priority is gradual reperfusion
by maintaining the victim in a seated or semi-recumbent position for 30–45
minutes while monitoring vital signs and summoning EMS. Flat positioning is
contraindicated until circulatory stabilization.
Q8: During a twin-rope rescue system setup, the belay line must meet specific
criteria to function as a redundant safety line. What is the MINIMUM breaking
strength requirement for a rescue-rated kernmantle rope used as a belay line?
A. 3,000 lbf
B. 4,500 lbf
C. 6,000 lbf
D. 9,000 lbf
Correct Answer: C
Rationale: Correct because per NWSA TT2 standard and NFPA 1983, rescue-rated
life safety rope must have a minimum breaking strength of 6,000 lbf (26.7 kN) for
one-person rescue loads and 9,000 lbf for two-person loads. The priority is
ensuring the belay line can withstand dynamic shock loads with adequate safety
factor; 6,000 lbf is the baseline for single-rescuer operations.
Q9: A technician must perform a rope access transfer from a fixed ladder to a
blade platform using two lanyards. Per NWSA TT2 fall protection protocol, how
many points of attachment must be maintained at ALL times during the transfer?
A. One point of attachment is sufficient if rated for 5,000 lbs
B. Two points of attachment, never less than one
CERTIFICATION EXAMINATION COMPLETE QUESTIONS
AND DETAILED SOLUTIONS — LATEST UPDATE
SECTION 1: ADVANCED CLIMBING & RESCUES
(Self-Rescue, Pick-Offs, Suspension Trauma — 15 Questions)
Q1: A TT2 technician must perform a locked-out tag-out on a GE 1.5 MW wind
turbine gearbox for a filter change. After opening the main disconnect and
applying the lock, what is the NEXT required step per NWSA LOTO protocol for
multi-energy sources?
A. Insert a tag stating "DO NOT OPERATE" with name and date
B. Test for zero energy state using a calibrated meter
C. Remove the fuses from the auxiliary control cabinet
D. Place the work order tag on the nacelle entry door
Correct Answer: B
Rationale: Correct because NWSA TT2 LOTO protocol requires verification of
zero energy state after isolation BEFORE applying tags or proceeding with
maintenance to prevent stored energy release. Stored energy in capacitors,
rotating masses, or hydraulic accumulators can cause serious injury if not
verified. Per NWSA TT2 standard, the six-step LOTO sequence is: (1) Notify
affected personnel, (2) Shut down equipment, (3) Isolate energy sources, (4)
Apply locks and tags, (5) Verify zero energy state, (6) Perform work. Testing with a
calibrated meter confirms de-energization.
Q2: During a blade inspection at 80 meters, a technician's fall arrest lanyard
shock absorber deploys after a 4-foot fall. Per NWSA TT2 standard, what is the
MAXIMUM allowable elongation of the shock-absorbing lanyard after
deployment?
A. 24 inches
B. 42 inches
C. 48 inches
D. 60 inches
,Correct Answer: B
Rationale: Correct because per NWSA TT2 standard and ANSI Z359.13, a shock-
absorbing lanyard must limit maximum arresting force to 1,800 lbs and elongate
no more than 42 inches (3.5 feet) during deployment. The priority is controlling
deceleration distance to prevent secondary impact with lower structures while
maintaining force below injury thresholds.
Q3: A technician is suspended in a full-body harness after a fall arrest event at
height. Which symptom indicates the ONSET of suspension trauma (orthostatic
intolerance) and requires immediate rescue action?
A. Mild discomfort in the shoulder straps
B. Nausea, dizziness, and tingling in the extremities
C. Slight rope burn on the hands
D. Increased heart rate from adrenaline only
Correct Answer: B
Rationale: Correct because per NWSA TT2 standard, suspension trauma
progresses rapidly when venous pooling occurs in the legs due to harness
compression of femoral vessels. Nausea, dizziness, and tingling indicate
compromised circulation and imminent loss of consciousness. The priority is
rescue within 5–15 minutes; delayed rescue can result in reflow syndrome and
cardiac arrest upon horizontal positioning.
Q4: During a pick-off rescue of an unconscious suspended worker, the rescuer
must transfer the victim's load from the damaged system to the rescue system.
What is the CORRECT sequence per NWSA TT2 rescue protocol?
A. Attach rescue system, cut victim's lanyard, lower victim
B. Attach rescue system, transfer load, verify security, disconnect victim's system
C. Cut victim's lanyard first, then attach rescue system quickly
D. Lower victim on damaged system while attaching backup
Correct Answer: B
Rationale: Correct because per NWSA TT2 standard, the priority is maintaining
continuous load support during transfer. The rescuer must first establish an
independent anchor and attachment point, transfer the victim's weight to the
rescue system, verify all connections are secure and gates locked, then
,disconnect the compromised system. Cutting or removing the original system
before transfer confirmation risks catastrophic secondary fall.
Q5: A TT2 technician is performing a self-rescue from a jammed ascender on a
fixed ladder. The technician has a foot loop and hand ascender available. What is
the CORRECT mechanical advantage system to create for ascending past the
obstruction?
A. 1:1 direct pull on the rope
B. 2:1 simple haul system using the foot loop
C. 3:1 Z-rig with pulley and prusik
D. 4:1 compound system with two pulleys
Correct Answer: B
Rationale: Correct because per NWSA TT2 standard, a 2:1 simple haul system
using a foot loop attached to the rope above the obstruction provides adequate
mechanical advantage for a single technician to overcome friction and body
weight. The priority is simplicity and speed in an emergency; complex systems
introduce failure points and require more equipment than typically carried during
routine climbs.
Q6: A rescue team must evacuate an injured technician from the nacelle of a
Siemens 2.3 MW turbine during high winds. The nacelle door is a leading edge
with a 6-foot drop to the roof below. What is the PRIMARY hazard control for
leading edge rescue operations?
A. Positioning the rescue litter parallel to the edge
B. Using a self-retracting lanyard (SRL) with leading edge certification
C. Deploying a temporary guardrail system before edge approach
D. Rappelling directly from the nacelle without edge protection
Correct Answer: B
Rationale: Correct because per NWSA TT2 standard, leading edges present
severe fall hazards where standard SRLs may fail due to edge abrasion and
dynamic loading. The priority is using an SRL specifically rated and certified for
leading edge applications, which incorporates enhanced webbing, shock
absorption, and edge-radius testing. Standard SRLs without leading edge rating
are prohibited for this application.
, Q7: A technician experiences suspension trauma symptoms after 8 minutes post-
fall arrest. The rescue team has reached the victim. What is the CORRECT victim
positioning protocol per NWSA TT2 standard?
A. Immediately lay the victim flat on their back
B. Maintain the victim in a seated or semi-recumbent position for 30–45 minutes
C. Elevate the victim's legs above heart level
D. Place the victim in the recovery position and administer fluids
Correct Answer: B
Rationale: Correct because per NWSA TT2 standard, sudden horizontal
positioning after suspension trauma can cause toxic blood return to the heart
(reflow syndrome), triggering cardiac arrest. The priority is gradual reperfusion
by maintaining the victim in a seated or semi-recumbent position for 30–45
minutes while monitoring vital signs and summoning EMS. Flat positioning is
contraindicated until circulatory stabilization.
Q8: During a twin-rope rescue system setup, the belay line must meet specific
criteria to function as a redundant safety line. What is the MINIMUM breaking
strength requirement for a rescue-rated kernmantle rope used as a belay line?
A. 3,000 lbf
B. 4,500 lbf
C. 6,000 lbf
D. 9,000 lbf
Correct Answer: C
Rationale: Correct because per NWSA TT2 standard and NFPA 1983, rescue-rated
life safety rope must have a minimum breaking strength of 6,000 lbf (26.7 kN) for
one-person rescue loads and 9,000 lbf for two-person loads. The priority is
ensuring the belay line can withstand dynamic shock loads with adequate safety
factor; 6,000 lbf is the baseline for single-rescuer operations.
Q9: A technician must perform a rope access transfer from a fixed ladder to a
blade platform using two lanyards. Per NWSA TT2 fall protection protocol, how
many points of attachment must be maintained at ALL times during the transfer?
A. One point of attachment is sufficient if rated for 5,000 lbs
B. Two points of attachment, never less than one
