MN Boilers Exam Word Scramble

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Question	Answer
How to determine Boiler HP on conventional boilers?	1 Boiler HP=10sqft of heating surface
A.S.M.E. ?	American Society of Mechanical Engineers
1 Boiler HP on Coil Type Boilers?	5sqft of heating surface
1 Boiler HP on Conventional Boilers?	10sqft of heating surface
1 Boiler HP on electric type Boilers?	10KW
What is Latent Heat?	“Hidden Heat” Heat required to change a state but not the temp.
What is sensible Heat?	Heat that we can see and measure.
What is a shift operator?	In charge of boiler during your shift.
Time you must put in on a low pressure boiler in order to qualify for your next license?	12 calendar months, must include one heating season.
Time you must put in on a high pressure boiler in order to qualify for your next license?	2000 hours
Minimum information in your log book?	Who checked the boiler, what did you check and when did you check it.
Who can sign an affidavit?	Anyone with a license above a special engineer. Best answer is Chief Engineer
How to determine the maximum working pressure of your boiler?	It is located on the safety valve.
Is it acceptable to make a photocopy of your license?	Yes, and it is required if you are in charge of multiple Boilers.
Heating surface on a boiler is?	An area that has heat on one side and water on the other.
What is a boiler?	container transfers heat holds water collects steam
HRT?	Horizontal Return Tubular
Purpose of tubes?	Increase the heating surface and stabilize the tube sheets.
The three types of Boilers?	Water Tube Fire Tube *Cast Iron Sectional
What is a push nipple?	Short piece of pipe that is tapered on both ends.
What is the maximum steam pressure on a cast iron boiler?	15psi
What is a staybolt?	It is a brace that protects the inside of the boiler from imploding.
Which seam on a boiler is susceptible to the most stress?	Longitudinal seam
What is an economizer?	It is used to pre-heat the water after the boiler exit.
What is a pre-heater?	It pre-heats the combustion air after the boiler exit.
Which tubes are easier to change on a boiler?	Fire tube
Which tube is the most dangerous in the case of an explosion?	Fire tube because of the water volume.
What is the first thing you check on a low pressure boiler?	Water level
What is the first thing you check on a hot water boiler?	Temperature and pressure
What is a water column?	A dampening device
What is the minimum pipe side for connecting to the water column?	1 in.
What do you use to monitor water levels if you have a broken sight glass?	Tri-cox or gauge cox but you must have constant supervision.
What two valves are required on a freshwater line?	Stop valve and check valve?
What is a check valve?	An automatic valve that allows flow in one direction.
Where is the stop valve located?	Closest to the boiler.
What type of action is he glove valve used for?	Throttling action
What is referred as the difference in pressure when a safety valve opens or closes?	Blowback
Why is a safety valve sealed?	So it cannot be tampered with out in the field.
How often do you check the safety valve on a low pressure system?	90 days
How often do you check the safety valve on a high pressure system?	Annually or yearly
What is the minimum sized safety valve for a low pressure system?	4 1/2 in.
What is the minimum pipe size for attaching a pressure gauge?	1/4 in.
What is the maximum temperature of a Bordon Tube?	150 degrees
The gauge must be able to read _____ times the pressure, preferably _____ times the pressure of the boiler?	1 1/2 to 2 times
What is a pigtail for?	It controls the temperature to protect the Bordon Tube from the high temperature of the steam.
What is an Aquastat?	It is a temperature sensing device.
What two scales does a Pressure troll have?	Cut-in and differential
What is the maximum pipe size for the bottom blowdown line?	2 in.
How do we open/close the blowdown valve?	We do it slowly.
How many valves are required on a blowdown line for Boilers over 100hp and 100psi?	2 valves
What is the maximum temperature for water entering the sanitary sewer line?	150 degrees
What are the reasons we use the bottom blowdown?	control sediment control high water control chemical situation drain boiler
What is the bottom blowdown in a hot water boiler called?	Drain Valve
How often should we blowdown?	As much as needed.
What is a slow opening valve?	A valve that requires 5 turns.
What is required in a boiler room?	Log book and Boilers license
When is a Boilers most likely to explode?	During light off
When is a boiler least likely to explode?	During heavy load.
What devices are contained in the windbox?	Sailswitch and damper or pressure switch and damper.
What is purging?	Removing fuel from the combustion chamber. (4-5 air exchanges per purge cycle.)
What is the pilot phase?	When the fuel valve opens and we can ignite the fuel.
What are the three T’s of combustion?	Time Temperature *Turbulence
What is a chemical reaction that results in heat?	Combustion
What 3 things are needed to sustain combustion?	Heat Fuel *Oxygen
What device controls the starting and stopping of the burner on a hot water boiler?	Aquastat
What device controls the starting and stopping of the burner on a low pressure boiler?	Pressure troll
What chemical is used to remove oxygen?	Sodium Sulfite
What is used as a mechanical means of removing oxygen from the feed water?	De-erating tank
What is draft?	The difference in pressure between two points.
What is the device that is used to measure draft?	Manometer
What are the three different types of draft?	Natural Forced *Induced
Where is the induced draft fan located?	After the boiler exit. This fan needs to be larger than the forced fan.
Where is the forced draft fan located?	On the front of the boiler.
What is it called when you have all the drafts together?	Balanced Draft
What is the air called that is over and above what is required for the combustion process?	Excess Air
Types of flu gas analyzers are?	Fyrite and Orsat
Two safety valves with a vent in the middle?	Double Block and Bleed
What is the danger of running a gas burner at low flame?	The possibility of extinguishing the fire.
What are the three types of fuel oil used?	#1 #2 #5 #6
Which fuel oils are referred to as light oil?	#1 and #2
Which fuel oils are referred to as heavy oil?	#5 and #6
What temperature is required to ignite heavy fuel oil?	It needs to be brought to the ignition temperature.
What is it the lowest point oil will flow readily as a liquid called?	Pour Point
What is the BTU content of #1 fuel oil?	140,000 BTU per gallon
What is the BTU content of #2 fuel oil?	142,000 BTU per gallon
What is the BTU content of #5 fuel oil?	150,000 BTU per gallon
What is the BTU content of #6 fuel oil?	152,000 BTU per gallon
What is a Ringlemann Chart?	It is a smoke opacity chart.
What are the three different pumps in our system?	Reciprocating Pump Rotary Pump *Centrifugal Pump
How do you determine the rotation of a centrifugal pump?	Which way the veins are facing.
What happens to the boiling point in a vacuum?	It will decrease.
What are the three different ways to atomize fuel oil?	Direct Pressure High Power Steam/High Power Compressed Air *Rotary Cup
What will cause a buildup on the back wall?	Plugged fuel oil nozzle.
What is it called when you relive the pressure in the head of an air compressor?	Unloading the heads.
What clothing is required in the boiler room?	Whatever PPE (Personal Protective Equipment) you plant requires.
Can low water occur in a hot water heating type boiler?	Yes, for any number of reasons.
In addition to a Safety Relief Valve what other safety device should be installed on a hot water boiler?	Low water fuel cutoff.
What removes air from a Hot Water boiler system	Air Control
If the circulating pump fails what valve can manually be opened to provide hot water to the heating units through natural circulation?	Flow Control Valve
Oxygen in the boiler water can lead to?	Corrosion and pitting of the boiler metal.
When a hydrostatic test of a boiler exceeds the maximum allowable working pressure each safety valve (if left attached to the boiler) should?	Have its valve disc held to its seat by means of a testing clamp or gag.
What is the gauge pressure plus 14.7 called?	Absolute pressure
What is it called when a safety valve opens and closes rapidly?	Chattering
When a steam boiler system is blowing into the condensate tank or vacuum pump, what could the problem be?	Steam Trap Malfunction
What is the unit that shuts the burner off in case of low water?	Low-Water Fuel Cutoff
Water treatment chemicals are used in low pressure boilers for?	Preventing Scale Reducing Oxygen
In a steam boiler system what is the term used for replacing the water that has been lost by blowing down the boiler or through leaks in the system?	Makeup
In order for fuel to burn it must be heated to?	Its ignition temperature
On a steam boiler system why are the bottom blow down valves installed at the lowest point of the water side of the boiler?	To remove sludge and sediment.
What should be done if the water is not visible in the gauge glass because of failure of the feed water supply?	Shut off the fuel to the burner and secure the boiler.
What is the minimum size safety valve that must be installed on a miniature boiler (less than 5 cubic feet)?	1/2 in.
What is the minimum sized drain required on a water column?	3/4 in.
What is air that is mixed with the fuel at or in the burner?	Primary Air
The evaporation of 34 1/2 poinds of water per hour from and at a temperature of 212 degrees F is defined as?	1 boiler HP
The low water fuel cut-off should be tested?	At least once daily.
What is the transfer of heat from one part of material to another or to a material from which it is in contact with?	Conduction
Boilers are considered low pressure when?	Steam boilers are not over 15 psi and liquid boilers are not over 160 psi and or 250 degrees F.
Boiler and boiler fittings used in the state of Minnesota must be constructed to what code?	ASME
The first sequence in the series of automatic boiler control is?	Purge
If a steam trap on a radiator of a steam heating system becomes water logged, what will happen?	The radiator will not heat the room properly.
How often should a low water cut-off be opened and inspected internally?	Annualy
If you cannot determine the water level what must you do?	Reduce load to low fire until level is determined.
Who is responsible for boiler inspection?	Owner or properly licensed engineer.
What is the purpose of an expansion tank?	Allows for expansion and contraction as the water volume varies.
State of Minnesota requires that boilers be inspected how often?	Annually/Yearly
What is the purpose of bottom blowdown besides removing sludge?	Drain the boiler
Steam boilers under 200 HP must have the low water cut off tested how often?	Daily
Comparing a Hot Water Boiler to a Steam Boiler, what does a Hot Water Boiler have that a Steam Boiler does not?	Circulating Pump Expansion Tank *Aqua Stat
According to national board code safety valves are to be tested how often?	90 days
What must be done after a Hot Water Boiler has been drained, cleaned, and refilled?	Remove the air
When in operation a high pressure boiler of 25 HP, must be checked how often?	24hrs
All stationary boilers of what pressure must have 2 valves on the blow off line?	100 psi
How is Boiler efficiency calculated?	Output divided by Input
A high pressure boiler is classified as such when?	above 15psi steam and 160 psi water pressure

Created by: cbavier