PENNSYLVANIA (PHILADELPHIA) DEMOLITION CLASS B - 468_PA_PH CONTRACTOR VERIFIED ANSWERS AND QUESTIONS - MOST RECENT EDITION

1. What is the primary federal agency responsible for workplace safety in
demolition operations?
• A) EPA
• B) OSHA
• C) DOT
• D) NFPA ANSWER : B) OSHA
2. Before beginning demolition work, what must be done with all utility
services?
• A) Reduced to minimum flow
• B) Monitored continuously
• C) Shut off, capped, or otherwise controlled
• D) Reported to the city ANSWER : C) Shut off, capped, or otherwise
controlled
3. What is the minimum distance workers must maintain from unprotected
edges of floors, roofs, or platforms?
• A) 3 feet
• B) 6 feet
• C) 10 feet
• D) 15 feet ANSWER : B) 6 feet
4. Hard hats are required on demolition sites when there is potential for:
• A) Dust exposure only

, • B) Head injury from falling objects
• C) Sun exposure
• D) Cold weather conditions ANSWER : B) Head injury from falling
objects
5. What OSHA standard specifically covers demolition operations?
• A) 1926.850
• B) 1926.501
• C) 1910.146
• D) 1926.652 ANSWER : A) 1926.850
6. Steel-toed boots are required when:
• A) Temperature is below 32°F
• B) Working near water
• C) There is danger of foot injuries from falling objects
• D) Only when requested by supervisor ANSWER : C) There is danger
of foot injuries from falling objects
7. What type of respirator is required when asbestos is present?
• A) N95 dust mask
• B) HEPA filter respirator or higher
• C) Surgical mask
• D) Cloth face covering ANSWER : B) HEPA filter respirator or
higher
8. How often must scaffolding be inspected during demolition work?
• A) Weekly
• B) Monthly
• C) Before each work shift
• D) Only after installation ANSWER : C) Before each work shift
9. What is the maximum allowable noise exposure for an 8-hour workday?
• A) 75 dBA

, • B) 85 dBA
• C) 90 dBA
• D) 100 dBA ANSWER : C) 90 dBA
10. Fall protection is required at what height in construction/demolition?
• A) 4 feet
• B) 6 feet
• C) 10 feet
• D) 12 feet ANSWER : B) 6 feet
11. What must be provided when workers are exposed to falling object
hazards?
• A) Safety goggles only
• B) Toe boards, screens, or barricades
• C) Warning signs
• D) Reflective vests ANSWER : B) Toe boards, screens, or barricades
12. Trenches deeper than how many feet require a protective system?
• A) 3 feet
• B) 4 feet
• C) 5 feet
• D) 6 feet ANSWER : C) 5 feet
13. What is required before entering a confined space?
• A) Written permission only
• B) Entry permit and atmospheric testing
• C) Buddy system only
• D) Supervisor notification ANSWER : B) Entry permit and
atmospheric testing
14. Eye protection must meet which ANSI standard?
• A) Z87.1
• B) Z89.1

, • C) Z41.1
• D) Z90.1 ANSWER : A) Z87.1
15. Ground fault circuit interrupters (GFCIs) are required for:
• A) 120-volt, single-phase, 15- and 20-ampere receptacles
• B) 240-volt circuits only
• C) Three-phase circuits only
• D) Outdoor lighting only ANSWER : A) 120-volt, single-phase, 15-
and 20-ampere receptacles
16. What is the minimum width for a scaffold platform?
• A) 12 inches
• B) 18 inches
• C) 24 inches
• D) 36 inches ANSWER : B) 18 inches
17. Ladders must extend how many feet above the landing surface?
• A) 1 foot
• B) 2 feet
• C) 3 feet
• D) 4 feet ANSWER : C) 3 feet
18. What is the maximum slope angle for a portable ladder?
• A) 60 degrees
• B) 65 degrees
• C) 75 degrees
• D) 4-to-1 ratio (horizontal to vertical) ANSWER : D) 4-to-1 ratio
(horizontal to vertical)
19. Fire extinguishers must be provided within what distance of work
areas?
• A) 50 feet
• B) 75 feet