Download MINNESOTA SPECIAL BOILER LICENSE EXAM 2024 | ALL QUESTIONS AND CORRECT ANSWERS | GRADED A+ and more Exams High Pressure Vessels and Boilers in PDF only on Docsity!
MINNESOTA SPECIAL BOILER LICENSE EXAM
2024 | ALL QUESTIONS AND CORRECT
ANSWERS | ALREADY GRADED A+ | LATEST
VERSION (JUST RELEASED)
When the bottom blow down valves are used on a steam boiler, what valve located closet to the boiler shell? ------CORRECT ANSWER---------------The quick opening valve What is the function of an automatic city water feeder on a low pressure boiler? ------CORRECT ANSWER---------------To control water to the feed water tank The purpose of a safety valve on a steam boiler is to: ------CORRECT ANSWER---------------To prevent the boiler from exceeding its MAWP The control designed as a safety back up, should the operating fail is: ------ CORRECT ANSWER---------------A high limit control The capacity of a safety valve used on a steam boiler is measure in: ------ CORRECT ANSWER---------------pounds of steam that can be discharge in one hour. How does a pressuretrol attach to the steam space of boiler control the burner operation? ------CORRECT ANSWER---------------On pressure decrease - starts the burner.
What action should an operating engineer take if a defect is discovered in a boiler requiring repairs not of a routine nature? ------CORRECT ANSWER-- -------------Notify the boiler inspector. Boiler are considered low pressure when? ------CORRECT ANSWER-------- -------Steam Boiler are not over 15 psi and liquid boiler are not over psi 160 and 250 deg. F What boiler license required is required for operating a boiler as a shift engineer in a plant having 3 boiler each 1660 sq. ft. of heating surface? -----
- CORRECT ANSWER---------------Second The maximum temperature to be carried on a low pressure hot water boiler is: ------CORRECT ANSWER---------------Less than 250 f The popping pressure of a safety relief valve on a low pressure hot water heating boiler cannot exceed: ------CORRECT ANSWER---------------160 psi The bottom blow down line on a steam boiler system is located at the: ------ CORRECT ANSWER---------------Lowest Point on the waterside of a steam boiler. For the purpose of rating boiler horsepower for engineer license classifications only. How many sq. ft. of heating surface shall be considered equivalent to one boiler horsepower for conventional boiler? ------ CORRECT ANSWER---------------10 sq. ft.
Can a low water low water condition i a hot water heating type boiler? ------ CORRECT ANSWER---------------Yes, for numerous reasons Other than a safety relieve valve what other safety device should be installed on a hot water heating boiler? ------CORRECT ANSWER------------- --Low water cut off Each boiler in a battery (pipe together sharing the same common header) must have: ------CORRECT ANSWER---------------A main stem stop what removes air from a hot water boiler system? ------CORRECT ANSWER---------------Air Control In a stem boiler system, the unit that turns be burner on and off based on steam pressure is the: ------CORRECT ANSWER---------------Pressure Control If water in the gauge is not visible because of failure of the feed water supply, what should be done? ------CORRECT ANSWER---------------Shut off the fuel to the burner and secure the boiler. What conditions are necessary to cause a furnace explosion? ------ CORRECT ANSWER---------------Accumulation of unburned fuel, oxygen and an ignition source
The LWCO should be tested: ------CORRECT ANSWER---------------Daily Gauge pressure plus 14.7 psi is called what? ------CORRECT ANSWER---- -----------Absolute pressure The evaporation of 34.5 ponds of water per hour from and at a temperature of 212 degrees Fahrenheit is defined as: ------CORRECT ANSWER---------- -----One boiler horsepower When a safety valve opens and closes rapidly it is referred to as ------ CORRECT ANSWER---------------Chattering Furnace explosions are caused by a buildup of combustible gases, or vapors in the combustion chamber, what is the term used to remedy this condition? ------CORRECT ANSWER---------------Purging Why is a pigtail or siphon required in steam pressure gauge lines? ------ CORRECT ANSWER---------------to protect the gauge from a high temperature. In a stem boiler system, what is the term used for replacing the water that has been lost by blowing down the boiler through leaks in the system? ------ CORRECT ANSWER---------------A make up water
What is the best way to test the low water fuel cut off? ------CORRECT ANSWER---------------An evaporating test-if the water goes out the glasses before the burner shuts down secure the fire immediately. After new boiler is installed, but before it is put into operation, this test must be performed and witnessed by State Boiler Inspector? ------CORRECT ANSWER---------------Hydro static Test Tri- Cocks or gauge are sued on steam boiler yo indicate? ------CORRECT ANSWER---------------The true water level inside the boiler. On steam or hot boiler, the safety valve or safety relieve valve could be tested by? ------CORRECT ANSWER---------------By lifting the lever on the valve or raising the pressure until they operate. Before starting a steam or hot boiler, you should be check for? ------ CORRECT ANSWER---------------Water in the boiler. The dial on a pressure gauge used on a low pressure boiler should be graduated to: ------CORRECT ANSWER---------------One and One half to Two times the maximum allowable working pressure. The three basic types of low pressure boiler are: ------CORRECT ANSWER---------------A fire tube, water tube and cast iron sectional.
The term used for the evaporative capacity output of a steam boiler is expressed in: ------CORRECT ANSWER---------------Pounds per hour What boiler license is required to be in charge of a boiler plant having 2 boiler each having 2500 sq. ft., of heating surface? ------CORRECT ANSWER---------------1st Class when testing the LWCO on steam boiler, the burner should be firing why? -- ----CORRECT ANSWER---------------To see if the burner shuts off How often should safety valves be tested on a low pressure boiler? ------ CORRECT ANSWER---------------Quarterly (90 days) For high pressure boilers, a year is defined as? ------CORRECT ANSWER-- -------------2000 hours The low water fuel cut off is most important electrical/mechanical devices on a boiler, it should be tested? ------CORRECT ANSWER---------------Daily What should be posted in the boiler room? ------CORRECT ANSWER-------- -------Boiler licenses and Inspection certificate or exception certificate The ASME Code states that boilers with over_______square of heating surface must have 2 or more safety valves? ------CORRECT ANSWER------ ---------500 sf
A high pressure boiler must have two means of feed water supply if it exceeds_______horsepower? ------CORRECT ANSWER--------------- 50 The low water cut off (LWCO) is a device fitted to the boiler to shut the_________________? ------CORRECT ANSWER---------------Fuel supply to the burners if the water level becomes too low A high pressure boiler of 25 HO should be checked every? ------CORRECT ANSWER---------------24 hrs. The first and most important task for a boiler operator entering a boiler room is to check the ______ of all boilers on-line? ------CORRECT ANSWER---------------Water level The low-water fuel cut off is tested by blowing its float chamber or doing a(n) ______test? ------CORRECT ANSWER---------------Evaportaion According to the Minnesota boiler statues a high pressure boiler plant 31 to 200 horsepower may be left in operation unattended by an operating engineer for no more than _______consecutive hours when the permisses are occupied by employees or the public? ------CORRECT ANSWER--------- ------Two In most US jurisdictions , a(n)________boiler inspection is mandated by law? ------CORRECT ANSWER---------------Annual
Boiler operating data commonly recorded in a boiler room logbook includes? ------CORRECT ANSWER---------------When the boiler checks were made, Who made the boiler checks, What specific checks were made. The most important common steam pressure gauge by the movement of a(n). ------CORRECT ANSWER---------------Bourdon Tube A high pressure steam boiler is a boiler with an MAVP of more than_______psi? ------CORRECT ANSWER--------------- 15 When performing an evaporation test, the water in the sight/gauge glass_______? ------CORRECT ANSWER---------------Must be visible the operator at all times. Boilers equipped with 2 LWCO's must have what on the auxiliary LWCO? -- ----CORRECT ANSWER---------------Manual reset An indicator of soot build-up on a boiler is? ------CORRECT ANSWER------- --------High Stack temperature The purpose of the lever on a safety valve is? ------CORRECT ANSWER---- -----------To test the operation What elements in fuel are need to create combustion?
