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Low pressure boiler
Question | Answer |
---|---|
How many days in advance can you renew your licence? | 60 |
What is the maximum fine for any infraction? | $5000.00 |
The expansion tank in a hot water system allows for the expansion of: | Water |
As the water in a hot water system expands: | The pressure remains constant |
The on-off controls of a steam boiler are installed: | In a vertical position |
Boiler fittings are important for: | Safety only |
True or false: Thermostatic traps remove air and cool condensate | True |
What happens when you have a closed oil vent? | Oil spill |
Where is the jurisdiction (registration) # on a boiler? | On the front of the boiler |
The low water fuel cut-off should be blown down: | Daily |
A low water fuel cutoff: | Shuts off the fuel supply |
What chemical prevents pitting? | Sodium sulfate |
Safety valves should be tested: | Once a month |
What is the most important fitting on a boiler? | Safety valve |
The main purpose of testing a safety valve is to: | Make sure it operates freely |
When testing a safety valve by hand, you must: | Have at least 75% of popping pressure |
What is the purpose of an expansion tank? | Allows the expansion of water |
What type of boiler is a HRT boiler? | Fire tube |
What is the first thing you check when entering a boiler room? | The water level |
What # oil needs to be preheated with what piece of equipment? | #6 oil with an oil heater |
What type of test is a hardness test? | A titration test |
A steam gauge is calibrated in: | Pounds per square inch |
What code is a heating boiler built to? | ASME Section IV |
What letter stamp represents a low-pressure boiler? | H |
What is the minimum fine for not properly posting a licence? | $500.00 |
Where would you place a water temperature indicator? | At the boiler supply |
True or false: A chief engineer is not needed in order a low pressure plant | True |
What prevents a furnace explosion? | The purge cycle |
Ignition failure would cause activation of the: | Purge cycle |
What is the maximum horsepower a low pressure licensed operator can operate to? | No limit |
The pressuretrol: | Turns the burner on and off |
What test is performed on re-tubed (repaired) boiler and what is the temp.? | Hydrostatic test at 75°F |
Under what ASME Section is the care and operation of heating boilers? | Section VI |
Boiler water should have a a pH of: | 11 |
What is the maximum size blowdown line? | 2 1/2 inches |
When do you close a boiler vent? | When steam comes out |
Combustion air is controlled by: | Inlet dampers, fan intake vanes and fan speed |
How are the sections of a cast iron boiler put together? | Push nipples and bolts |
An aquastate is sensitive to changes in: | Water temperature |
Who can adjust a safety valve? | Manufacturer representative |
How many pounds of steam per hour in one boiler horsepower? | 34.5 pounds per hour |
How much horsepower do you need to obtain a black seal (low or high pressure) license? | Over 100 horsepower |
What does PSIA stand for? | Psif + atmospheric pressure |
Water column & gauge should be blown down: | Daily |
What oil has to be heated? | #6 |
Natural water may contain: | Solids and other pollutants |
What is the purpose of a check valve? | Prevents reverse flow & allows flow in one direction |
A solenoid valve: | Is an automatic gas shutoff valve |
Where does fuel atomize? | At the burner tip |
Vacuum gauges are are calibrated in inches of: | Mercury below |
What is the most important rule in operating boilers? | Keep water are proper level |
What is the capacity of a safety valve measured in? | Pounds of steam per hour (# steam/hr.) |
What protects sewer lines from high temperatures and pressures from blowdowns? | Blowdown tank |
Carryover can lead to: | Water hammer |
If water leaves the boiler at 170°, what temperature does it return at? | 150° |
If a license is expired, how long can it be expired before it is null and void? | 3 years |
Where are the combustion gases on a serpentine boiler? | Below the tubes |
The positioning control cannot function without: | Air |
What fire tube boiler is most efficient? | 4 pass |
A rotary cup burner atomizes fuel: | By means of a spinning cup/high velocity air |
Retubed or new boiler Re cleaned with: | Alkaline detergent |
True or false: An OS&Y valve offers the least resistance to flow | True |
True or false: a welded repair is allowed on the pressure retaining area of a boiler or pressure vessel. | True |
When connecting a bourbon tube steam gauge to a boiler, a pigtail is used to: | Protect bourbon tube from steam |
What happens if a steam trap continuously blows through? | Steam vents from condensate tank |
The most common type of pressure control device used is the: | Mercury tube |
Heavy soot on the fireside of tubes: | Should be removed for better heat transfer |
Natural draft is produced by: | Difference in temperature outside chimney from inside chimney. |
If a draft fan is located between the boiler and chimney, what type of draft system is it? | Induced draft |
Smoke indicators are important because: | Operator cannot view smoking conditions |
What is the most positive way of checking the water level in a boiler? | Try cocks |
What is the most common cause of cast iron boiler failure? | Cracking |
What is the most common cause of problems in a hot water system? | Air |
If a baffle breaks, what happens? | Increase of furnace gases and stack temperature |
When would a high suctii j line be used in a fuel tank? | When there is sludge or water in the tank |
A vapors tattoo is sensitive to: | Gas pressure |
When the vaporstat starts operating, it activates the: | Fuel line solenoid valve |
What is the minimum temperature of a how water boiler operation to prevent condensation? | 170°F |
True or false: The amount of draft is not affected by the height of the stack. | False |
A modulating pressuretrol controls: | The boiler's high and low fire |
A modulating pressure control is sensitive to: | Pressure |
The basic function of snow automatic feedwater regulator on a boiler is to: | Maintain proper water level |
A boiler with water surrounding the outside of the tubes is called a ________ boiler. | Fire tube |
Who is authorized to re-adjust the setting of a safety valve on a pressure vessel? | Authorized manufacturer's rep. |
Cracking of the boiler metal along the seams can be caused by: | Caustic embrittlement |
On a gas fired boiler, how would you test the operation of the fire eye? | By shutting off the gas supply |
Where are the combustible gases located in a water tube boiler? | Flowing around the tubes |
What is considered the most important fitting on a boiler? | The safety valve |
When performing a hydrostatic test, the pressure on the boiler should not exceed: | 2.5 times the safety valve setting |
A boiler operator log must be maintained in a boiler room containing over: | 100 horsepower |
If the fire-eye or flame scanner shuts off because the main flame fails, what device does it secure? | Fuel solenoid valve |
The air to gas ratio is maintained by a? | Modulating motor and linkage, air damper, & butterfly valve. |
A draft fan located between the boiler and chimney is what type of draft? | Induced |
Boiler water having high alkalinity will develop: | Caustic embrittlement |
The most accurate means of deciding the frequency of blowdown of a boiler is determined by a _______? | Boiler operator |
What device is used to obtain sufficient static head for the returning condensate in a two pipe gravity return system? | Return trap |
In a hot water heating boiler, the maximum water temperature the boiler can be, in order to qualify in NJ as low pressure, is: | 250°F |
A vaporstat proves: | Gas pressure |
The purge cycle on a boiler is designed to perform what function? | Remove combustible gases |
The type of valve located between the boiler and the safety valve must be a: | No valve |
A common type of feedwater regulator is a: | Pressure sensitive device |
When open, an OS&Y valve offers _______ to the flow of steam. | No resistance |
What section of the ASME code do hot water heating boilers fall under? | Section IV |
Which describes the combustion chamber of a serpentine tube heating boiler? | Located below the tubes |
What should you do if you walked into a boiler room and the safety valves were popped and the boiler pressure is above its MAWP (maximum allowable working pressure)? | Secure the fire at the burner |
What letter stamp do hot water heating boilers fall under? | H |
In NJ, how often should boilers over 100 horsepower be inspected internally and externally? | Annually |
A manometer is calibrated in what units of measurement? | Inches of water |
Bottom blowdown is the best performed when a boiler is ______. | Under light load |
What is the main purpose of a check valve on the boiler feedwater line? | Allow flow in one direction only |
The main function of a water column on a steam pressure boiler is to: | Slow down movement of water to get accurate reading of water levels |
A steam pressure gauge is designed to show steam calibrated in: | Pounds per square inch |
The primary function of the MBCS (micro burner combustion system) is: | Combustion safety |
What is the purpose of an aquastat? | Controls water temperature |
What is the name of the device used to keep live steam from getting into a pressure gauge? | Siphon loop |
What is the minimum temperature at which a hot water heating boiler should be operated at to prevent flue gas condensation? | 170°F |
The vaporstat should be electrically interlocked with the: | Fuel solenoid valve |
What is the name of the science that is used for heating while used water as a conveying medium? | Hydronics |
Automatic feedwater regulators are blown down how often? | Daily |
A safety valve on a low pressure hot water boiler will have a maximum setting of: | 160 psig |
Hard water contains ________. | Scale-forming salts |
According to NJ Mechanical Inspection Bureau rules, the boiler jurisdiction (registration) number must be placed on the ______ of each boiler? | Front |
On a low pressure boiler, after start-up, when do you close the vent valve? | When steam comes out |
How are cast iron sectional boilers put together? | With push nipples and bolts |
What is the maximum horsepower a NJ low pressure licensed operator can operate up to? | No limit |
New or re-tubed boilers should be cleaned with: | An alkaline solution |
In the state of NJ, safety valves on low and high pressure boilers should be tested how often? | Monthly |
One boiler horsepower, according to NJ Mechanical Inspection Bureau, equals: | 34.5 lbs. steam per hour @ 212°F |
When starting a shift, the first thing a boiler operator should check is: | The water level of all boilers |
In the event of a flame failure, the programmer will _______. | Secure the fuel, purge the firebox, and then shut down |
How often would you blow down a boiler with no chemical water analysis? | Once every 24 hours |
Absolute pressure is equal to ______. | Gauge pressure + atmospheric pressure |
Heavy accumulations of soot on heating surface can lead to: | Decrease in boiler capacity |
Where should the boiler registration number be located? | On the front of the boiler |
The ______ regulates the high and low fire of the burner? | Modulating pressure control |
The water column and gauge glass should usually be blown down ________. | Daily |
Pressure gauges are calibrated in pounds per ______. | Square inch |
The primary function of a low water fuel cutoff is to _______. | Shuts down burner if the water level drops |
A low water fuel cutoff should be tested _______. | Daily |
Which of these similar size valves requires the most manual valve stem rotation to move from fully opened to fully closed? (Each has non-rising stem) | Gate |
Combination forced and induced draft is also known as _______ draft. | Balanced |
Draft in a boiler is measured in _______. | Inches of water |
What is an acceptable pH level in boiler water? | 11 |
_______ can lead to water hammer. | Carryover |
Oxygen in boiler water causes ______. | Pitting |
A boiler that is priming has ______. | Water carried over with the steam |
The first thing a boiler operator should do when taking over a shift is _______. | Check the boiler water level |
Preparation for a boiler inspection requires having the boiler _______. | Cooled, opened and thoroughly cleaned |
Cast iron sectional boilers are built for what type of draft firing? | Mechanical forced and/or induced |
A furnace explosion can be prevented by _______. | Purging after ignition failure |
If in good standing, an expired license can be renewed (with a fine) within: | 3 years |
As solids and alkalinity in boiler water increase: | Waterside scaling is increased |
What is the most readily discernible indication of firing with insufficient secondary air? | Black smoke coming from the stack |
How do you clean new or re-tubed boilers? | With an alkaline detergent solution |
What is the maximum size of the bottom blowdown line and surface blowdown line? | 2.5" |
To avoid the danger of a furnace explosion during start-up, the firing sequence allows for: | A pre-purge period |
Which of the following would cause scale in a boiler? | Caustic soda and soot build-up |
What is the pressure called in an idle boiler? | Static pressure |
What is the basic function of an automatic feedwater regulator? | Maintain boiler water at proper level |
What happens if a steam trap continuously blows through? | Steam will vent from condensate tank |
A boiler operator's log must be maintained in all plants with over: | 100 horsepower |
True or false: In a plant which has 100 HP total capacity, a licensed operator is not needed. | True |
What is the heat content of one therm of natural gas? | 100,000 Btu's |
Carryover could be dangerous and cause: | Water hammer |
What is the most common cause of problems in hot water systems? | Air |
If your boiler had a fire inside the furnace after the unit has shut down, what would you check? | Fuel system |
If a boiler has been dry fired, what device did not work properly? | Low water cut-off |
Natural water may contain: | Solids, gases & other pollutants |
What is the difference between a safety relief and a safety valve? | The closing spring on a relief valve resides in a compressed state; the spring on the actuator in the safety valve acts in tension |
What valve acts similar to a check valve in a hot water system? | Flow control |
Boiler water having a high alkalinity could develop: | Caustic embrittlement |
Draft is a difference in pressure that causes: | Air or gases to flow |
Where would scale form on a boiler? | Below the water line |
How many days prior to the expiration date of your license can you send in your renewal? | 60 days |
On cast iron hot water heating boilers, where should make-up water be added? | In return line |
How often would you blowdown a boiler with no water analysis? | Once every 24 hours |
The maximum temperature and pressure allowed on low pressure heating boilers is: | 250°F at 160 psi |
What is the applied science for hot water boiler systems? | Hydronics |
What is the main purpose of establishing plant safety rules? | To protect employees and equipment |
The water temperature setting on a hot water boiler should be no less than ________ to prevent flue gas condensation. | 170°F |
On a valve that had minor packing leak, an adjustment was made to the packing gland, but the operator finds the valve stuck. What may have caused this? | |
The operator overtightened the packing, causing the stem to bind | |
True or false: The amount of natural draft generated is not affected by the height of the stack. | False |
Vacuum gauges are calibrated in inches of ________ atmospheric pressure. | Mercury below |
True or false: The main function of thermostatic steam trap with a bellows is to remove air and cool condensate. | True |
The rotary cup burner uses ________ to atomize the fuel oil. | A spinning cup and high velocity air |
In order to verify the position of a fully open manual valve, the operator should operate the handwheel: | In the closed direction, then open the valve to the previously open position |
Name the 4 systems to operate a steam boiler. | Steam, feedwater, fuel, draft |
The most accurate means of deciding the frequency of blowdown of a boiler is determined by: | Boiler water analysis |
What protects the sewer line from the high temperature pressure coming from the boiler blowdown lines? | Blowdown tanks |
What is required for complete combustion? | Mixture, atomization, temperature, time |
What is the maximum penalty for operating with about an expired license? | $5000.00 |
The ASME code section for care and operation of a hot water heating boiler falls under: | Section VI |
True or false: The stem valve is a valve with the least resistance to flow. | True |
Fire tube and water tube boiler fittings: | Serve the same purpose |
What protects the hot water heating system from exceeding the maximum allowable working pressure (MAWP)? | Safety relief valve |
Saturated steam is steam at: | It's corresponding temperature and pressure |
What is the minimum size safety valve allowed on a low pressure boiler? | 3/4 inch |
An indication of a dirty fuel oil strainer would be: | Slight change in pressure drop |
When the heat energy in steam is lost, what happens to it? | Turns to condensate |
Blowing down a boiler excessively will cause a loss of: | Blowdown heat |
What would cause scale to form in a system? | Calcium and magnesium |
If a fuel oil tank that is being filled with fuel oil has a clogged vent line, it would result in: | Pressure buildup, causing an oil spill |
What type of test is to measure hardness? | Titration test |
What is the most positive way to check the water level in a boiler? | Use try cocks |
What is the observed pressure of a non-operating boiler called? | Static pressure |
What is the purpose of backseating a manual valve in an operating system? | To isolate pressure from packing and stuffing box to minimize leakage in packing |
Boilers are equipped with combination gas/fuel oil burners for: | More flexible operation |
When you have carry-over, what is occurring? | Water is carrying over to steam |
If your license expired and you paid the penalty, how long can it be expired without applying for and retaking the exam? | Three years |
A safety device that monitors the water level in the boiler and is electronically connected to a fuel solenoid valve is called a: | Low water cut-off |
What device is used to obtain sufficient static head for returning condensate in a two pipe gravity return system? | A return trap |
What is the maximum pressure allowed in low pressure steam boilers? | 15 psi |
The safety limit control device used on fuel lines is sensitive to: | Fuel pressure |
Mercury tube pressure control devices will be accurate when installed: | In vertical position |
How many pounds of steam per hour at 212°F equal one horsepower? | 34.5 lbs./hr |
What does an aquastat control? | Water temperature |
The fire-eye (flame sensing device) or scanner is located: | On the front of the furnace |
New or re-tubed boilers should be cleaned with: | An alkaline solution |
When a baffle breaks in a fire tube boiler, what condition occurs? | Increase in stack temperature |
A steam pressure gauge is designed to show steam calibrated in: | Pounds per square inch |
If you add fuel to a fuel tank with a clogged vent, it will result in: | Pressure buildup, oil spill |
The relieving capacity of a safety valve is measured in: | Lbs./hr. that it is discharging |
Why have duplex strainers between the oil tank and fuel oil pump? | So strainers can be cleaned without having to secure the boiler |
How is natural draft produced? | By the difference in temperature of the gas in the chimney to that of air ouside |
To produce one pound for steam, it is necessary to evaporate: | One pound of water |
What would cause the pilot gas limit on a rotary cup oil burner to come into operation? | A lack of pilot gas pressure |
What type of boiler is an HRT (horizontal return tube) boiler? | Fire tube |
Which describes the combustion chamber of a serpentine tube heating boiler? | Located below the tubes |
In hot water boilers, variations in the volume of water is taken care of by the: | Expansion tank |
The two scales on the boiler pressure control: | Set the operating steam pressure range |
Where is the boiler vent located? | |
On the front of the furnace |