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NYC boiler practical Exam Prep Questions With 100% Correct Answers 2025 Latest Update.

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How do you use the bottom blow? - Answer 1. Requires two people. one to operate valves, one to watch water level 2. Verify blow down tank is lined up. 3. Verify slow opening valve is closed. 4. Open (inner) Quick opening valve. 5. Then open (outer) slow opening valve for 10-15 seconds. 6. Close (outer) slow opening valve. 7. Then close(inner) quick opening valve. 8. Re-Open (outer) slow opening valve to relieve pressure. 9. Close (outer) slow opening valve. Name Boiler Safeties? - Answer 1.Low water cutout 2. Vaporstat 3. High furnace pressure explosion door 4. high furnace pressure trip 5. flame detector 6. safety valves 7. fuel oil fusible link 8. pressuretrols ( low/high oil pressure) 9. proof of closure gas valve (block and bleed) 10. solenoid valves 11. non-return valve 12. high and low gas pressure switches 13. low fuel pressure 14. low atomizing air pressure 15. main gas supply low pressure What is desirable percentage of CO2,CO and O2? - Answer GAS OIL O2 1-4% 3-7% CO2 10% 12% CO 0% 0%

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NYC boiler practical Exam Prep
Questions With 100% Correct Answers
2025 Latest Update.
How do you use the bottom blow? - Answer 1. Requires two people. one to operate valves,
one to watch water level

2. Verify blow down tank is lined up.

3. Verify slow opening valve is closed.

4. Open (inner) Quick opening valve.

5. Then open (outer) slow opening valve for 10-15 seconds.

6. Close (outer) slow opening valve.

7. Then close(inner) quick opening valve.

8. Re-Open (outer) slow opening valve to relieve pressure.

9. Close (outer) slow opening valve.



Name Boiler Safeties? - Answer 1.Low water cutout

2. Vaporstat

3. High furnace pressure explosion door

4. high furnace pressure trip

5. flame detector

6. safety valves

7. fuel oil fusible link

8. pressuretrols ( low/high oil pressure)

9. proof of closure gas valve (block and bleed)

10. solenoid valves

11. non-return valve

12. high and low gas pressure switches

13. low fuel pressure

14. low atomizing air pressure

15. main gas supply low pressure

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