quizzes: expand all 35 quizzes to 15 questions each

OPS-1 through OPS-10, OS-2, OS-3 went from 5 → 15.
OS-1, OS-4 through OS-11, SEC-1 through SEC-11, TRB-1 through TRB-4 went from 7 → 15.
Questions cover exam-weight scenarios not duplicated from original content.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

quizzes/OPS-4-quiz.md

@@ -42,6 +42,76 @@ B. To reduce trip hazards and improve organization
 C. To disable grounding  
 D. To block ventilation  
 
+6. A technician needs to replace a laser printer's toner cartridge. Which safety step is most important?
+
+A. Wear an ESD wrist strap  
+B. Avoid inhaling toner and dispose of the cartridge properly  
+C. Connect to the network first  
+D. Remove the RAM first  
+
+7. Which type of fire extinguisher is recommended for electrical equipment fires?
+
+A. Class A (water)  
+B. Class B (foam)  
+C. Class C (CO2 or dry chemical)  
+D. Class D (dry powder for metals)  
+
+8. A technician works inside a tower with power disconnected. Why should they still ground themselves?
+
+A. To improve Wi-Fi signal  
+B. To prevent ESD damage from stored static on their body  
+C. To enable remote access  
+D. To update the BIOS  
+
+9. Why should food and drinks be kept away from workstations during repair?
+
+A. To comply with font licensing  
+B. To prevent liquid damage and contamination of components  
+C. To reduce ticket volume  
+D. To satisfy the SLA  
+
+10. A technician is disposing of a CRT monitor. Which hazard requires special handling?
+
+A. Low battery voltage  
+B. High-voltage capacitors that may hold a charge  
+C. Loud fan noise  
+D. Low display resolution  
+
+11. Which environment poses the greatest ESD risk to components?
+
+A. High humidity  
+B. Low humidity and dry air  
+C. High temperature  
+D. High air pressure  
+
+12. What is the correct first step when a technician encounters a chemical spill from a battery?
+
+A. Wipe it up without protection  
+B. Consult the SDS/MSDS and follow proper cleanup procedures  
+C. Store the device in a cabinet  
+D. Update the ticket and ignore it  
+
+13. Why use a surge protector rather than just a power strip?
+
+A. To enable wireless connectivity  
+B. To protect equipment from voltage spikes that can damage components  
+C. To increase the number of USB ports  
+D. To reduce screen brightness  
+
+14. When should a technician wear an ESD wrist strap?
+
+A. When replacing a toner cartridge  
+B. When cleaning a monitor  
+C. When handling RAM, CPUs, or other static-sensitive internal components  
+D. When updating software  
+
+15. A technician needs to work on a computer in a static-prone environment. Which precaution is best?
+
+A. Wear rubber-soled shoes only  
+B. Use an ESD mat and wrist strap and avoid touching circuit board traces  
+C. Keep the power connected for grounding  
+D. Place components on a carpeted floor  
+
 ## Answer Key For Instructor
 
 1. B
@@ -49,3 +119,13 @@ D. To block ventilation
 3. A
 4. D
 5. B
+6. B
+7. C
+8. B
+9. B
+10. B
+11. B
+12. B
+13. B
+14. C
+15. B