Special Boiler License Practice Exam Minnesota Questions and Answers with complete solution

Special Boiler License Practice Exam Minnesota Questions and Answers with complete solution How many way can heat be transferred? - answer✔✔Three (Conduction -- Convection -- Radiation) How may types of low pressure are there? - answer✔✔Three Boiler and boiler fitting used in the state of Minnesota must be constructed to what code? - answer✔✔A.S.M.E What controls the starting ans stopping of the burner by sending the temperature of the wa ter in a hot water boiler? - answer✔✔Aqua Stat When a hydrostatic test of a boiler exceeds the maximum allowed working pressure each safety valve, if left attached to the boiler, should: - answer✔✔Have its valve disc held to its seat by means of testing cl amp or "gag" Heat can be transferred in three ways and they are: - answer✔✔Conduction --Convection - Radiation The first sequence in the series of automatic burner control is: - answer✔✔Purging Can a low water low water condition i a hot water heating type boiler? - answer✔✔Yes, for numerous reasons Other than a safety relieve valve what other safety device should be installed on a hot water heating boiler? - answer✔✔Low water cut off Each boiler in a battery (pipe together sharing the same common header) m ust have: - answer✔✔A main stem stop what removes air from a hot water boiler system? - answer✔✔Air Control In a stem boiler system, the unit that turns be burner on and off based on steam pressure is the: - answer✔✔Pressure Control If water in the gauge i s not visible because of failure of the feed water supply, what should be done? - answer✔✔Shut off the fuel to the burner and secure the boiler. What conditions are necessary to cause a furnace explosion? - answer✔✔Accumulation of unburned fuel, oxygen and an ignition source The LWCO should be tested: - answer✔✔Daily Gauge pressure plus 14.7 psi is called what? - 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: - answer✔✔One boiler horsepower When a safety valve opens and closes rapidly it is referred to as - 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? - answer✔✔Purging Why is a pigtail or siphon required in steam pressure gauge lines? - 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? - answer✔✔A make up water On steam boiler system, why are bottom blow down valves installed at th e lowest point of the waterside of boilers? - answer✔✔To remove sludge and sediment. Boiler heating is defining as : - answer✔✔Water on one side hot gases on the other side. In a fire tube boiler, the water - answer✔✔Surrounds the tubes When the bottom blo w down valves are used on a steam boiler, what valve located closet to the boiler shell? - answer✔✔The quick opening valve What is the function of an automatic city water feeder on a low pressure boiler? - answer✔✔To control water to the feed water tank The purpose of a safety valve on a steam boiler is to: - answer✔✔To prevent the boiler from exceeding its MAWP The control designed as a safety back up, should the operating fail is: - answer✔✔A high limit control The capacity of a safety valve used on a ste am boiler is measure in: - 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? - answer✔✔On pressure decrease - starts the burner.