BOILER Q&A

      

1. The purpose of the programmed purge cycle on an    automatically fired auxiliary boiler is to _______________./remove explosive vapors from the furnace

2. An auxiliary boiler equipped with a return flow fuel atomization system, has a _____________./variable fuel return pressure

3. Heavy soot accumulations in an auxiliary boiler could be caused by _____________./improper burner maintenance

4. Prior to lighting off a cold automatically fired auxiliary boiler, you should _____________./check and regulate the water level

5. Within the cycle of a forced circulation auxiliary   water-tube boiler, part of the water flashes into steam, and the remaining hot water is _________________./collected in the lower portion of the steam accumulator  for recirculation back to the heating coil or water tank

6. Ignition failure in an automatically controlled auxiliary boiler could be caused by _____________./carbon deposits on the flame scanner

7. In a coil-type auxiliary water-tube circulation boiler  _____________./unevaporated feedwater collects in the bottom of the flash chamber

8. A dirty atomizer sprayer plate in the burner of an auxiliary boiler, would be indicated by ____________./an unevenly shaped burner flame

9. Which of the following actions takes place in the control circuit of an automatically fired auxiliary boiler when the desired steam pressure is obtained?/The high limit control secures power to the entire oil  firing system.

10. Throttling a burner air register on an auxiliary boiler  could result in ____________./smoky boiler operation

11. A burner producing black smoke in an automatic auxiliary boiler, would be caused by a/an ______________./incorrect primary air setting

12. Which of the following actions should be taken when an  auxiliary boiler is operation?/Inspect for oil and water leaks.

13. Failure of the burner flame in an automatic auxiliary boiler would probably be a result of ______________./water in the fuel oil

14. If the flame of an automatically fired auxiliary   boiler tends to move away from the burner tip when the  firing rate is changed from low to high, you should   ____________./adjust damper linkage to slow the opening rate of the  dampers

15. Which of the following procedures decreases the total  dissolved solids concentration in the water of an auxiliary boiler?/Bottom blowing

16. If the fire goes out in an automatically fired auxiliary boiler and the burner continues to supply fuel, there is a potential danger of ______________./a severe furnace explosion

17. Improper maintenance of an automatic auxiliary boiler oil burner could result in ______________./decreased boiler efficiency

18. In accordance with Coast Guard Regulations (46 CFR), water level controls utilized in a small automatically fired  auxiliary heating boiler, shall be tested ______________./slowly by lowering the boiler water level

19. After a normal, or safety shutdown, automatic combustion control systems for an auxiliary boiler are designed to  prevent the immediate refiring of a burner in order for the ________________./furnace to be repurged

20. When preparing to light off a cold boiler equipped with a return flow fuel oil system, the recirculating valve directs the flow of oil ____________./back to the suction side of the service pump

21. Which of the following conditions will cause only one  of the burner solenoid valves to close on an automatically fired, two burner unit, auxiliary boiler?/A faulty coil in one of the solenoid valves

22. The burner assembly on an automatically fired auxiliary  boiler fitted with variable capacity, pressure atomizing burners, maintains steam pressure by ______________./changing fuel oil return pressure

23. While an auxiliary boiler is operating at design load, which of the following actions will occur if the automatic  combustion control system detects a steam pressure drop?/The fuel oil valve and air damper will open wider.

24. According to Coast Guard Regulations (46 CFR), when an  automatically fired boiler has a flameout, which of the  following actions should occur FIRST?/The fuel valve should be de-energized.

25. The water in an auxiliary boiler should be chemically tested daily for alkalinity and _________________./chloride content

26. The primary function of a flame safeguard system, as used on an automatically fired auxiliary boiler, is to prevent  ____________./explosions in the boiler furnace

27. The purpose of designing some waste heat boilers with  sinuous fire tubes, is to ____________./increase the rate of heat transfer to the waterside

28. The amount of chloride content in the water of an auxiliary boiler can be reduced by ____________./blowing down the boiler

29. The fuel supply system to an automatic auxiliary boiler, will be automatically shutdown if the boiler ______________./water level is abnormally low

30. In readying an auxiliary water-tube boiler for a routine hydrostatic test, which of the following procedures should be undertaken prior to filling the boiler with fresh water?/The boiler vent valves should be opened.

31. Constant capacity pressure atomizing fuel oil burners  installed on automatically fired auxiliary boilers, respond to variations in load demand by ____________./automatically cycling the burner on and off

32. Which of the following conditions could cause the feed pump for an auxiliary boiler to lose suction?/Excessive feedwater temperature

33. Coast Guard Regulations (46 CFR) specify that the fuel oil ignition system, on a small automatically fired auxiliary boiler, shall be energized ____________./only before, or simultaneously with, the opening of the fuel oil valve

34. The amount of oil atomized by the return flow variable  capacity atomizer, used with some automatically fired  boilers, is controlled by the _______________./oil pressure in the oil return line

35. An automatically fired auxiliary boiler is required by Coast Guard Regulations (46 CFR) to be shutdown as a result of ____________./low water level

36. Fins are installed on the generating tube surfaces in waste heat boilers to ____________./increase the rate of heat transfer

37. Subtracting the return flow meter reading from the supply flow meter reading on a boiler equipped with a return flow fuel oil system, determines the amount of oil ____________./burner throughput

38. In a fire-tube auxiliary boiler, you should expect to find the thickest scale on the waterside of the ____________./crown sheet

39. If the feed pump for an auxiliary boiler fails to deliver the feed water to the boiler, the cause may be ____________./abnormally high feedwater temperature

40. When lighting off an auxiliary boiler, which of the   problems listed could cause the burners to sputter?/Water in the fuel oil

41. Which of the following actions should normally be taken  during each watch when the auxiliary boiler is in operation?/Inspect for oil or water leaks.

42. When there is a flame failure in an automatically fired  auxiliary boiler, the ____________./fuel supply is shut off

43. Excessive vibration of an automatically fired auxiliary  boiler can be caused by _____________./combustion pulses

44. Burner ignition failure in an automatically fired auxiliary boiler would be caused by ____________./a burned out solenoid in the oil supply valve