Download Minnesota Special Engineer Boiler License Exam Questions and Verified Answers 100% Correct and more Exams Nursing in PDF only on Docsity! 1 Minnesota Special Engineer Boiler License Exam Questions and Verified Answers 100% Correct (2024-2025 New Update) 2 Q 1. Before testing a low water fuel cut-out what must be done? ~ Answer: The burner must be on. Q 2. Heat can be transferred in how many ways? ~ Answer: Three. Q 3. Aqua stats work by sensing: ~ Answer: Temperature. Q 4. Name the 3 different ways heat can be transferred. ~ Answer: Radiation, Conduction, Convection Q 5. How many types of boilers are there? ~ Answer: Three: Fire tube, Water tube, Cast iron sectional 5 Q 16. A boiler with a new burner OR a new boiler room must have ~ Answer:A kill switch by each door leaving the boiler room. Q 17. The low water fuel cut off should be tested: ~ Answer: At least once a day when the boiler is in operation. Q 18. What is the purpose of a check valve used in a feed water line going to a steam boiler? ~ Answer: To restrict the flow in one direction only. Q 19. Where would you expect to locate pyrometer? ~ Answer: In the exhaust gases leaving the boiler Q 20. What would the pyrometer tell you? ~ Answer: The Temperature 6 Q 21. An aqua state would be used on what type of boiler? ~ Answer: A hot water boiler Q 22. Globe valves are used when you need to ~ Answer:Throttle or restrict the flow Q 23. Three types of drafts are ~ Answer:Natural, forced, and induced. Q 24. What is a pyrometer? ~ Answer: type of remote-sensing thermometer used to measure the temperature of distant objects Q 25. What are the two types of water circulation? ~ Answer: Closed and open loop 7 Q 26. One psi will push up a column of water how many feet? ~ Answer: 2.31 ft Q 27. Hot water boilers typically have blank psi on the boiler at all times. ~ Answer: 12-18 psi Q 28. What are two types of compression(expansion) tanks used on hydronic systems? ~ Answer: Diaphragm and open tanks Q 29. What types of valves can be used for throttling the water flow? ~ Answer: Globe, ball Q 30. On what part of the boiler should the safety relief valve be located? ~ Answer: Top of the boiler 10 ~ Answer: High and Low pressure boilers not to exceed a total of 50 boiler horsepower, or a shift engineer in a 100 horsepower plant. Q 39. Special Engineer may serve as an apprentice of what size water/liquid or steam/vapor boiler? ~ Answer: In any plant regardless of size under the direct supervision of a properly licensed engineer. Q 40. The purpose of low water cut out on a steam or hot water boiler is to what? ~ Answer: Shut off the burner when a low water condition exists. Q 41. The valve or valves that must relieve all excess pressure on a steam or hot water boiler are what? ~ Answer: Safety valve and/or an ASME approved safety relief valve. Q 42. A Tri indicator could be found on ~ Answer: Hot water boiler 11 Q 43. A tri indicator would inform the boiler operator of what? ~ Answer: The TEMPERA- TURE of the water, the PRESSURE of the water in PSIG, and the ALTITUDE of water in feet. Q 44. What is the destructive force in a steam or hot water boiler explosion? ~ Answer: The instant release of energy stored in the water as heat. Q 45. An ASME approved safety relieve valve used on a hot water boiler is tested at the factory on what? ~ Answer: Steam first then hot water. Q 46. Some of the things you could find on a steam boiler (or hot water boiler) are what? ~ Answer: Low water cut off, safety valve or safety relief valve, pressure gauge. Q 47. What devices would only be found on a steam boiler? ~ Answer: Steam pressure gauge, tricocks, Pressuretrols 12 Q 48. An expansion tank or compression tank would be used in what? ~ Answer: Hot water boiler Q 49. What is the purpose of the expansion tank? ~ Answer: To provide for expansion and contraction of the water volume as its temperature varies. Q 50. On a hot water boiler, what is the purpose of the vent valve? ~ Answer: To make sure there is water inside the boiler and to vent any trapped air. Q 51. If the safety valve or ASME safety relief valve leaks you would do what? ~ Answer: -Have the valve repaired or replaced. Q 52. Tri cocks or gauge cocks are sued on a steam boiler to indicate? ~ Answer: The true water level inside the boiler. 15 Q 61. To reduce thermal shock on hot water boilers, what devices are used? ~ Answer: Low limit or low fire hold control, three way valve, run around pump. Q 62. On a steam boiler the control named operator will... ~ Answer: On pressure decrease: Start. On pressure increase: Stop. Q 63. On a hot water boiler the control called the operator will... ~ Answer: On temperature decrease: Start. On temperature increase: Stop. Q 64. On a steam boiler what is a siphon or pigtail used for? ~ Answer: To protect the steam gauge from too high of temperature. Q 65. What is one reason causing the expansion tank to fill with water? ~ Answer: Air leaks from the gauge glass fitting. 16 Q 66. What would you do if you came into a boiler room and found no water in the boiler? ~ Answer: Shut off the burner, secure the gas and allow the boiler to cool before refilling. Q 67. What is the purpose of the bottom blow down on a steam boiler? ~ Answer: To remove sludge and sediment and to drain the boiler. Q 68. When blowing down the water column the water should do what? ~ Answer: Refill the gauge glass quickly. Q 69. When doing the annual boiler inspection the boiler should... ~ Answer: Water and fire side cleaned and inspection ports open. Q 70. Purging is part of what cycle? ~ Answer: Firing cycle 17 Q 71. All steam traps will prevent steam from passing through them but will allow what to pass through them? ~ Answer: Dirt, air, and condensate.
