CDT Risk Management & Site Safety 3 — Questions and Answers
Question 1: Lockout/Tagout (LOTO) procedures are designed to protect workers from:
- Falling objects during roofing operations
- Unexpected energization or startup of machinery during maintenance (Correct answer)
- Chemical spills from storage tanks
- Electrical surges in office equipment
Correct answer: Unexpected energization or startup of machinery during maintenance
LOTO procedures (29 CFR 1910.147) ensure that hazardous energy is isolated and cannot be accidentally released while workers service or maintain equipment.
Question 2: A drafting technician is preparing excavation drawings. Per OSHA, which soil type requires the steepest allowable slope (closest to vertical) for a simple slope excavation?
- Type A soil
- Type B soil
- Type C soil
- Stable rock (Correct answer)
Correct answer: Stable rock
Stable rock may be cut vertically (90°); Type A allows 3/4:1, Type B allows 1:1, and Type C requires the shallowest slope of 1½:1.
Question 3: What is the purpose of a Job Hazard Analysis (JHA) in construction project planning?
- To estimate labor costs for each trade
- To systematically identify hazards associated with each job task and determine controls (Correct answer)
- To track change orders during construction
- To assign liability for accidents to specific subcontractors
Correct answer: To systematically identify hazards associated with each job task and determine controls
A JHA (also called Job Safety Analysis) breaks each task into steps, identifies hazards at each step, and specifies controls to prevent incidents.
Question 4: When reviewing site plans for temporary facilities, which factor is MOST critical for emergency egress planning?
- Proximity of trailers to the project entrance gate
- Clear, unobstructed paths leading to assembly areas and exits (Correct answer)
- Number of parking spaces provided for workers
- Orientation of trailers relative to prevailing winds
Correct answer: Clear, unobstructed paths leading to assembly areas and exits
Emergency egress requires that exit paths remain clear and wide enough for rapid evacuation, with clear signage directing workers to assembly points.
Question 5: Which type of personal protective equipment (PPE) is specifically required when a drafting technician visits a site where there is a risk of objects falling from above?
- Safety-toe boots
- Hard hat (Class E) (Correct answer)
- High-visibility vest
- Safety glasses
Correct answer: Hard hat (Class E)
Hard hats protect against overhead falling objects and are mandatory on most active construction sites; Class E provides electrical protection as well.
Question 6: A confined space is classified as 'permit-required' when it:
- Has dimensions that require a worker to crouch or crawl
- Contains or has the potential to contain a serious atmospheric or physical hazard (Correct answer)
- Is located below grade or underground
- Requires specialized tools to open or enter
Correct answer: Contains or has the potential to contain a serious atmospheric or physical hazard
A permit-required confined space has one or more serious hazards such as hazardous atmosphere, engulfment risk, internal configuration hazards, or other recognized serious safety risks.
Question 7: In seismic design drawings, a 'seismic risk category' designation is used to:
- Indicate the contractor's insurance class
- Determine the level of earthquake design forces and detailing requirements for the structure (Correct answer)
- Classify the soil type beneath the building
- Specify fire suppression system requirements
Correct answer: Determine the level of earthquake design forces and detailing requirements for the structure
Seismic Design Category (SDC) determines the level of seismic hazard and the corresponding structural detailing and system requirements per ASCE 7 and building codes.
CDT Risk Management & Site Safety 3
Lockout/Tagout (LOTO) procedures are designed to protect workers from: