EM EM Public Information and Warning Systems 2 — Questions and Answers
Question 1: What is the recommended maximum character limit for a Wireless Emergency Alert (WEA) message to ensure readability on mobile devices?
- 90 characters
- 160 characters
- 360 characters (Correct answer)
- 500 characters
Correct answer: 360 characters
WEA messages can be up to 360 characters on newer devices, allowing more detail than the original 90-character limit while remaining concise.
Question 2: In the context of emergency communications, what does 'redundancy' mean?
- Repeating the same message on the same channel
- Using multiple independent channels so that failure of one does not prevent message delivery (Correct answer)
- Having backup generators for EOC equipment
- Training extra PIOs for each shift
Correct answer: Using multiple independent channels so that failure of one does not prevent message delivery
Communication redundancy ensures that if one channel fails, alternate pathways can still deliver critical warnings to the public.
Question 3: Which of the following is NOT a standard component of an effective emergency warning message according to best practices?
- What is happening
- Who is at risk
- What protective actions to take
- Names of responsible officials (Correct answer)
Correct answer: Names of responsible officials
Effective warnings focus on the hazard, affected population, and protective actions rather than naming officials, which can delay delivery and confuse the public.
Question 4: What federal law requires broadcast stations to participate in the Emergency Alert System?
- Stafford Act
- Communications Act of 1934 as amended by FCC rules (Correct answer)
- National Emergencies Act
- Homeland Security Act of 2002
Correct answer: Communications Act of 1934 as amended by FCC rules
FCC regulations under the Communications Act mandate that broadcast stations, cable systems, and satellite providers participate in EAS.
Question 5: A 'shadow evacuation' occurs when:
- Officials quietly evacuate VIPs before issuing public orders
- People outside the mandatory evacuation zone self-evacuate in response to warnings (Correct answer)
- Night-time evacuations are conducted without lights
- Evacuees follow each other without official guidance
Correct answer: People outside the mandatory evacuation zone self-evacuate in response to warnings
Shadow evacuations increase road congestion and resource demands because residents outside the ordered zone leave voluntarily due to perceived risk.
Question 6: Which after-action review component evaluates whether public warnings were received, understood, and acted upon by the target population?
- Operational timeline review
- Warning effectiveness assessment (Correct answer)
- Financial reconciliation
- Mutual aid evaluation
Correct answer: Warning effectiveness assessment
Warning effectiveness assessments use surveys and behavioral data to determine whether public messaging achieved the intended protective response.
EM EM Public Information and Warning Systems 2
What is the recommended maximum character limit for a Wireless Emergency Alert (WEA) message to ensure readability on mobile devices?