AIT Safety Practices 3 — Questions and Answers
Question 1: Which color is universally used on safety labels and signs to indicate a DANGER condition?
- Yellow
- Orange
- Red (Correct answer)
- Blue
Correct answer: Red
Red is used for danger signs indicating an imminently hazardous situation that, if not avoided, will result in death or serious injury (ANSI Z535 standard).
Question 2: What does a confined space require before entry, according to OSHA's Permit-Required Confined Space standard?
- A ladder and a flashlight
- Atmospheric testing, ventilation, isolation of hazards, and a written entry permit (Correct answer)
- A hard hat and safety glasses only
- At least two workers present at all times
Correct answer: Atmospheric testing, ventilation, isolation of hazards, and a written entry permit
OSHA 29 CFR 1910.146 requires atmospheric testing, hazard isolation, ventilation, and a written entry permit before entering a permit-required confined space.
Question 3: What minimum oxygen concentration in the air is required for a confined space to be considered safe for entry without supplied air?
- 15.5%
- 16.5%
- 19.5% (Correct answer)
- 21.0%
Correct answer: 19.5%
OSHA requires a minimum of 19.5% oxygen concentration; below this level the atmosphere is considered oxygen-deficient and dangerous.
Question 4: Which OSHA standard requires employers to inform workers about hazardous chemicals in the workplace?
- OSHA 1910.147 (LOTO)
- OSHA 1910.1200 (Hazard Communication) (Correct answer)
- OSHA 1926.502 (Fall Protection)
- OSHA 1910.134 (Respiratory Protection)
Correct answer: OSHA 1910.1200 (Hazard Communication)
OSHA's Hazard Communication Standard (29 CFR 1910.1200), also known as HazCom or the 'Right-to-Know' rule, requires chemical labeling and SDS availability.
Question 5: An apprentice finds a frayed electrical extension cord on the job site. What should be done?
- Cover the frayed area with electrical tape and continue using it
- Remove it from service, tag it as defective, and report it for replacement (Correct answer)
- Only use it for low-power tools to reduce risk
- Wrap it in duct tape temporarily until a new one is ordered
Correct answer: Remove it from service, tag it as defective, and report it for replacement
Damaged electrical cords must be taken out of service immediately because exposed wiring creates serious shock, burn, and fire hazards.
Question 6: What is the primary purpose of a safety harness's shock-absorbing lanyard?
- To increase the worker's range of movement
- To limit fall distance and reduce the arresting force on the body during a fall (Correct answer)
- To allow work at greater heights without a harness
- To attach tools to the worker's belt
Correct answer: To limit fall distance and reduce the arresting force on the body during a fall
A shock-absorbing lanyard deploys and extends during a fall, reducing the peak arresting force on the body to safe levels (under 1,800 lbs).
Question 7: How often must portable fire extinguishers in the workplace be inspected, at a minimum, according to OSHA?
- Daily
- Monthly (Correct answer)
- Quarterly
- Annually only
Correct answer: Monthly
OSHA 29 CFR 1910.157 requires that portable fire extinguishers be visually inspected monthly and subjected to a thorough annual maintenance check.
AIT Safety Practices 3
Which color is universally used on safety labels and signs to indicate a DANGER condition?