NPLQ Knowledge 2 — Questions and Answers
Question 1: What is the recommended free chlorine level range for a public swimming pool according to standard guidelines?
- 0.5–1.0 mg/L
- 1.0–3.0 mg/L (Correct answer)
- 3.5–5.0 mg/L
- 5.0–7.0 mg/L
Correct answer: 1.0–3.0 mg/L
Public pools should maintain free chlorine between 1.0 and 3.0 mg/L to effectively sanitize without causing irritation.
Question 2: A lifeguard witnesses a patron slip and hit their head on the pool deck and become unconscious. What is the FIRST action to take?
- Begin CPR immediately
- Call for assistance and activate the emergency action plan (Correct answer)
- Apply a cervical collar
- Move the patron to a recovery position
Correct answer: Call for assistance and activate the emergency action plan
Activating the EAP ensures additional help is summoned before individual interventions begin.
Question 3: Which term describes the point at which a swimmer loses the ability to keep their airway above the water surface?
- Hypothermia onset
- Critical point of drowning
- Aquatic distress (Correct answer)
- Submersion threshold
Correct answer: Aquatic distress
Aquatic distress is the phase where a swimmer struggles to maintain their airway and needs immediate assistance.
Question 4: When conducting a head-spine-victim rescue in the water, how many rescuers are ideally needed to perform a safe log roll onto a backboard?
- 1
- 2
- 3 (Correct answer)
- 4
Correct answer: 3
Three rescuers are the recommended minimum — one stabilizing the head, one rolling the body, and one managing the backboard.
Question 5: What does a pool's 'turnover rate' refer to?
- The number of patron entries per hour
- The time taken for the entire pool volume to pass through the filtration system once (Correct answer)
- The frequency of chemical dosing
- The rate at which water evaporates
Correct answer: The time taken for the entire pool volume to pass through the filtration system once
Turnover rate is the time required to filter the total pool volume once, indicating filtration efficiency.
Question 6: A passive drowning victim is found face-down and motionless at the bottom of a 1.8 m pool. The FIRST priority upon reaching them is to:
- Remove them from the water as fast as possible
- Establish an airway and provide rescue breaths in the water if trained (Correct answer)
- Check for pulse before any movement
- Signal for the pool to be cleared
Correct answer: Establish an airway and provide rescue breaths in the water if trained
Providing rescue breaths in the water minimizes time without oxygen while the victim is being brought to the surface.
Question 7: Under duty-of-care principles, a lifeguard's legal obligation extends to:
- Only certified swimmers on the premises
- All persons within the designated supervision zone regardless of swimming ability (Correct answer)
- Patrons who have signed a liability waiver only
- Those who have formally requested assistance
Correct answer: All persons within the designated supervision zone regardless of swimming ability
Duty of care applies to every person within the lifeguard's assigned area of supervision, without exception.
NPLQ Knowledge 2
What is the recommended free chlorine level range for a public swimming pool according to standard guidelines?