CTC Hazard Analysis 3 — Questions and Answers
Question 1: A HAZOP study uses guide words applied to process parameters to identify deviations. Which guide word indicates that a parameter is completely absent?
- More
- Other Than
- No / None (Correct answer)
- Reverse
Correct answer: No / None
'No' or 'None' is the HAZOP guide word indicating a complete absence of the intended parameter, such as no flow when flow is required.
Question 2: Which MIL-STD standard provides the primary DoD requirements for system safety and hazard analysis in defense test programs?
- MIL-STD-882 (Correct answer)
- MIL-STD-461
- MIL-STD-1553
- MIL-STD-810
Correct answer: MIL-STD-882
MIL-STD-882 (System Safety) is the primary Department of Defense standard that establishes requirements for hazard identification, risk assessment, and risk management in defense programs.
Question 3: When classifying hazard severity, a condition that may cause severe injury, major occupational illness, or major property damage is typically categorized as:
- Catastrophic
- Critical (Correct answer)
- Marginal
- Negligible
Correct answer: Critical
Under MIL-STD-882, 'Critical' severity describes conditions that may cause severe injury, major illness, or major property/system damage short of complete loss.
Question 4: An Operational Hazard Analysis (OHA) is primarily focused on:
- Design-phase hardware failure modes
- Hazards that arise from personnel tasks, procedures, and the operational environment (Correct answer)
- Software logic errors that could cause system failure
- Environmental contamination resulting from test operations
Correct answer: Hazards that arise from personnel tasks, procedures, and the operational environment
An OHA evaluates hazards associated with human tasks, operational procedures, and the environment in which the system is used or tested.
Question 5: In a test range safety context, a 'destruct zone' is defined as:
- The area where test articles are deliberately destroyed after safe completion
- The geographic area where debris is expected to fall if a flight termination system is activated (Correct answer)
- The buffer zone surrounding a test cell to protect non-essential personnel
- The zone where explosive ordnance disposal teams operate
Correct answer: The geographic area where debris is expected to fall if a flight termination system is activated
A destruct zone (or impact zone) is the calculated area where debris would be expected to land following activation of a flight termination system, used to ensure public safety.
Question 6: Which of the following best describes the purpose of a Subsystem Hazard Analysis (SSHA)?
- To evaluate hazards at the system integration level across multiple subsystems
- To identify hazards arising within a single subsystem and its interfaces with other subsystems (Correct answer)
- To assess hazards during logistics and sustainment phases only
- To document hazards identified by end users after system fielding
Correct answer: To identify hazards arising within a single subsystem and its interfaces with other subsystems
An SSHA focuses on hazards within a specific subsystem and examines how that subsystem's interfaces with other subsystems may introduce or amplify hazards.
Question 7: During a test readiness review (TRR), the hazard analysis products are reviewed to ensure:
- All potential hazards have been completely eliminated with zero residual risk
- Identified hazards have been adequately controlled and residual risks have been formally accepted (Correct answer)
- The cost of hazard controls does not exceed the program budget
- All test personnel have signed liability waivers for accepted risks
Correct answer: Identified hazards have been adequately controlled and residual risks have been formally accepted
At a TRR, hazard analysis products are reviewed to confirm that identified hazards have appropriate controls in place and that remaining residual risks have been formally reviewed and accepted by the authorizing official.
CTC Hazard Analysis 3
A HAZOP study uses guide words applied to process parameters to identify deviations.
Which guide word indicates that a parameter is completely absent?