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Special Boiler License Practice Exam Minnesota
Terms in this set (78)
How many way can heat be transferred?
Three (Conduction -- Convection -- Radiation)
How may types of low pressure are there?
Boiler and boiler fitting used in the state of Minnesota must be constructed to what code?
What controls the starting ans stopping of the burner by sending the temperature of the water in a hot water boiler?
When a hydrostatic test of a boiler exceeds the maximum allowed working pressure each safety valve, if left attached to the boiler, should:
Have its valve disc held to its seat by means of testing clamp or "gag"
Heat can be transferred in three ways and they are:
Conduction --Convection - Radiation
The first sequence in the series of automatic burner control is:
Can a low water low water condition i a hot water heating type boiler?
Yes, for numerous reasons
Other than a safety relieve valve what other safety device should be installed on a hot water heating boiler?
Low water cut off
Each boiler in a battery (pipe together sharing the same common header) must have:
A main stem stop
what removes air from a hot water boiler system?
In a stem boiler system, the unit that turns be burner on and off based on steam pressure is the:
If water in the gauge is not visible because of failure of the feed water supply, what should be done?
Shut off the fuel to the burner and secure the boiler.
What conditions are necessary to cause a furnace explosion?
Accumulation of unburned fuel, oxygen and an ignition source
The LWCO should be tested:
Gauge pressure plus 14.7 psi is called what?
The evaporation of 34.5 ponds of water per hour from and at a temperature of 212 degrees Fahrenheit is defined as:
One boiler horsepower
When a safety valve opens and closes rapidly it is referred to as
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?
Why is a pigtail or siphon required in steam pressure gauge lines?
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?
A make up water
On steam boiler system, why are bottom blow down valves installed at the lowest point of the waterside of boilers?
To remove sludge and sediment.
Boiler heating is defining as :
Water on one side hot gases on the other side.
In a fire tube boiler, the water
Surrounds the tubes
When the bottom blow down valves are used on a steam boiler, what valve located closet to the boiler shell?
The quick opening valve
What is the function of an automatic city water feeder on a low pressure boiler?
To control water to the feed water tank
The purpose of a safety valve on a steam boiler is to:
To prevent the boiler from exceeding its MAWP
The control designed as a safety back up, should the operating fail is:
A high limit control
The capacity of a safety valve used on a steam boiler is measure in:
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?
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?
Notify the boiler inspector.
Boiler are considered low pressure when?
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?
The maximum temperature to be carried on a low pressure hot water boiler is:
Less than 250 f
The popping pressure of a safety relief valve on a low pressure hot water heating boiler cannot exceed:
The bottom blow down line on a steam boiler system is located at the:
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?
10 sq. ft.
What is recommended for boilers that will be out of service a long time is a possibility of freezing?
A dry lay up.
The rapid burning of fuel oxygen that the results in the release of heat is called?
On a steam boiler what is used to reduce the amount of movement of the water so the operator can get accurate reading of the water level in the gauge glass?
After repair work is done on the boiler what test is used to check for leaks?
Hydro static test
How can you tell if the sight / gauge glass isn't working properly?
Water move up and down slowly
What is the best way to test the low water fuel cut off?
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?
Hydro static Test
Tri- Cocks or gauge are sued on steam boiler yo indicate?
The true water level inside the boiler.
On steam or hot boiler, the safety valve or safety relieve valve could be tested by?
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?
Water in the boiler.
The dial on a pressure gauge used on a low pressure boiler should be graduated to:
One and One half to Two times the maximum allowable working pressure.
The three basic types of low pressure boiler are:
A fire tube, water tube and cast iron sectional.
The term used for the evaporative capacity output of a steam boiler is expressed in:
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?
when testing the LWCO on steam boiler, the burner should be firing why?
To see if the burner shuts off
How often should safety valves be tested on a low pressure boiler?
Quarterly (90 days)
For high pressure boilers, a year is defined as?
The low water fuel cut off is most important electrical/mechanical devices on a boiler, it should be tested?
What should be posted in the boiler room?
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?
A____ valve is a that permits fluid flow in only one direction and closes automatically to prevent blackflow
Minnesota state statue defines a "year" as _______ for low pressure heating boiler?
12 months - to includes the heating season and the reminder maintaining the LP boiler
In accordance with the statutes for the state of Minnesota, one boiler horsepower for steam coil type generator is equal to _______?
5 sq. ft. of boiler heating surface.
For licensing purposes, when the boiler heating surface cannot be discerned, the boiler horsepower shall be determinated by dividing the BTU input by______?
In accordance with the statues of the Minnesota, each electric boiler horsepower is equal to ___kilowatts?
The shift engineer of a high pressure boiler plant of over 200 HP must stay within____of boiler room at all times during the shift?
A high pressure boiler must have two means of feed water supply if it exceeds_______horsepower?
The low water cut off (LWCO) is a device fitted to the boiler to shut the_________________?
Fuel supply to the burners if the water level becomes too low
A high pressure boiler of 25 HO should be checked every?
The first and most important task for a boiler operator entering a boiler room is to check the ______ of all boilers on-line?
The low-water fuel cut off is tested by blowing its float chamber or doing a(n) ______test?
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?
In most US jurisdictions , a(n)________boiler inspection is mandated by law?
Boiler operating data commonly recorded in a boiler room logbook includes?
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).
A high pressure steam boiler is a boiler with an MAVP of more than_______psi?
When performing an evaporation test, the water in the sight/gauge glass_______?
Must be visible the operator at all times.
Boilers equipped with 2 LWCO's must have what on the auxiliary LWCO?
An indicator of soot build-up on a boiler is?
High Stack temperature
The purpose of the lever on a safety valve is?
To test the operation
What elements in fuel are need to create combustion?
1.) Carbon 2.) Mercury 3.) Ash 4.) Nitrogen 5.) Hydrogen
1. Carbon and 5. Hydrogen
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