B5 Q
The sections of cast iron boilers are mainly designed to obtain maximum
Heat transfer
An altitude gage on a hot water heating boiler is used to indicate
Height of the highest radiator in the system
A hydramotor valve
Helps to prevent puffbacks
Boiler water foaming may be the result of
High TDS
An automatic fill valve
Opens only when expansion tank level is low
If a safety valve leaks after a try lever test, the operator should
Operate the try lever several times to blow away foreign material
The capacity of a constant capacity in mechanical atomizer is a function of
Orifice size
The cross section of a bourdon tube is generally
Oval
In a hot water heating system, the closed type expansion tank should be
Partly filled with water
Gas burners designed for heating boilers can be divided into two general classes
Pre and after mix burners
In a cast-iron modular heating boiler, the operation of the burner of each module is controlled by a blank that starts or stops modules in sequence of load demand increases or decreases
Step controller
Current code states that the feedwater pipe, before it enters the boiler must be fitted with a blank valve adjacent to the boiler
Stop
It is necessary to clearly Mark or identify valves and fittings so that
Strength and material can be applied for a particular use
On a pressure temperature indicator, if the pressure pointer Falls below the altitude pointer the
System is low on water
When the pressure pointer of a closed system reads lower than the altitude pointer the
System requires water
Popping pressure of a steam heating boiler safety valve may be adjusted
Up to 5%
The safety valve shall be installed in the blank position and located in the highest practicable part of the heating boiler proper
Vertical
Which of the following boilers is considered a single pass boiler
Vertical fire tube boiler and Steel plate heating boiler
The advantage of a vertical fire tube boiler is that it required
Very small floor space
One of the advantages of the fire tube boiler over water tube and tubular boilers is in the
Water treatment area
The furnace walls in a bent tube water tube boiler are formed by water filled tubes and these walls are called
Water wall
A globe valve should be used in the feedwater line
Whenever it may be used for control purposes
Most low capacity cast iron boilers
Will pass through standard size door ways
Should the steam line or water line to a gauge glass become plugged with sludge, the gauge glass
Will read high
How are stop valves that are used on steam outlet connections of heating boilers identified
With metal tags
The lowest visible part of the steam heating boiler water gage glass shall be at least blank mm above the lowest permissible water level recommended by the manufacturer
25mm
The scale on the dial of the pressure or altitude gauge on a hot water heating boiler shall be graduated approximately 2 not more than blank times the pressure at which the safety relief valve is set
3
According to the current code, the maximum blowdown for a steam heating boiler safety valve is
30 kPa
The amount of premix air to atmospheric burner should be
30% to 40%
In order to keep salt concentrations within safe limits, the package tubular steam boiler utilizes
An automatic blowdown
During warm-up of a cold hot water boiler, excessive pressure buildup IS prevented by
An expansion tank
To prevent flue gases from escaping in a cast-iron sectional boiler, the spaces between the sections are sealed with high temperature
Asbestos rope
An agency or cold with which fittings must comply is
Asme code
The term heating plant is defined in
Asme section 4 and Alberta Power Engineers regulation
How many pressure relief valve on a hot water heating boiler have
At least one
The temperature indicator of a hot water boiler should indicate water temperature
At the boiler Outlet
The reduction of oil into very small particles is termed
Atomization
A closed type expansion tank on a hot water heating system must
Be partially filled with air at all times
Boiler blowdown lines have a specific size range based on
Boiler capacity
The ratio of heat released to heat transferred to the boiler water is known as
Boiler efficiency
If the boiler pressure increases then the
Bourdon tube will tend to straighten
The copper tube tubular boiler
Can be gas or oil fired
Cast iron boiler capacity
Can be increased by simply adding sections
A hot water boiler pressure relief valve
Can be installed anywhere in the system but preferably close to the expansion tank
Name of the different methods by which oil can be atomized for burning
Care, steam, mechanical, rotary cup
Your boiler is operated with automatic water feeders. If the boiler suddenly requires an increase in water treatment, what should you look for.
Check for a loss of feedwater
Try cocks are used to
Check the level of water in the boiler
If the power is cut off to an automatic gas valve, the valve will
Close immediately
The two basic varieties of mechanical atomizing oil burners are the
Constant capacity burner & modulating burner
The blank pilot is most often used on a small boiler
Continuous
Modular cast iron boiler water flow is
Continuous through all modules
The pilot burner for gas fired heating equipment can be
Continuous, interrupted and intermittent.
Heating boilers attain maximum efficiency only when they are operated
Continuously at full load
A reason for preferring copper tubing in a tubular boiler is
Corrosion resistance
To maintain high gas velocities through all gas passes in a 4 pass fire tube boiler, the cross-sectional area of each succeeding passes
Decreased
In a closed expansion tank system, an air separator
Direct air into the expansion tank
The force of the steam pressure acting on the safety valve discharge is a function of
Disc area
A steam boiler is blown down in order to
Discharge sediment and scale forming matter from the boiler
An initial problem with the tubular boiler being used as a steam unit was
Dissolved impurities forming scale on the tube
A pressure or altitude gauge for a hot water heating boiler
Does not require a siphon. Because there is no Steam
When too much air has been absorbed by water in the expansion tank of a closed system, the tank must be
Drained
One of the advantages of the low pressure Serpentine tube water tube boiler is
Ease of replacement of defective tubes
The Friends cast on the flat surface of the sections of a cast-iron sectional boiler are used for the purpose of increasing the
Effectiveness of heat transfer
A function of a bourdon tube gage hairspring is to
Eliminate backlash
One of the advantages of the low pressure Serpentine tube water tube boiler is virtually
Eliminate expansion and contraction stresses
One of the earliest fire tube boilers was the
HRT boiler
A membrane water wall
Has metal connecting the tubes
An internally fired boiler
Has the furnace surrounded by water
Smaller fire tube boilers are low cost and
Have simple rugged Construction
A steel plate vertical fire - unit is divided into two sections and the upper part is often called the
Heat exchanger
A disadvantage of a gauge glass safety shut-off valve is
It requires more maintenance
When a gas fired burner is burning fuel properly
It will have a blue flame with short yellow tips
When a packaged fire tube boiler is used as a power boiler rather than a heating unit
It will have a much stronger design
A cast iron boiler disadvantages
It's pressure limitations
A disadvantage of the water tube or tubular boiler is
Its water treatment monitoring
A siphon tube is necessary to
Keep steam out of bourdon tube
A siphon on a boiler is necessary to
Keep steam out of the bourdon tube
A steam pressure gage is graduated in
Kilopascals
An intermittent pilot
Lights the main flame and remains on with it.
The popping action of a safety valve is due to the
Lip on the valve disc
The combustion chamber of a serpentine tube water tube boiler is
Located below the tubes
The advantages of a package boiler are
Lower freight costs because of less handling. Lower initial cost because they are mass produced. Quality control is easier to implement. the boilers can be Factory tested before being sent to the customer. It requires little time to put the unit into operation at the plant.
Steam heating boilers must be equipped with a marker indicating the
Lowest permissible water line
The chief advantage of a package boiler is that it can be
Mass-produced
To which of the following oil burners is the oil supplies under high pressure
Mechanical atomizing burner
The working medium in the dead weight tester is
Medium weight oil
A steam heating boiler safety valve lever test should be performed
Monthly
Testing the safety valve by means of the try lever method, is considered good practice when carried out on a
Monthly basis
Boiler blowdown piping
Must be full size to the point of discharge
Open type expansion tanks
Must be located above the heating system
Boiler fittings
Must be registered by the government
One of the advantages of using natural gas as a fuel in a boiler is
No storage space is required.
At what other point, besides being connected to the boiler, put an expansion tank in a closed water heating system be located
On the supply Maine
What limits the height of a package boiler
Transportation requirements
The lip on a safety valve
Allows it to pop open
How many blow off valves does a steam heating boiler require
1
The scale on the dial of the pressure or altitude gauge on a hot water heating boiler Shelby graduated approximately 2 not left then blank times the pressure at which the safety relief valve is set
1.5
Low pressure heating boilers are those that operate below
100 kilopascals
According to current code, steam heating boilers shall have one or more safety valves, adjusted and sealed to discharge at a pressure not exceeding blank kPa
103
Low pressure hot water heating boilers are those that operate below
1100 kilopascal
According to current code, no safety valve on a steam boiler shall be larger than
110mm or 4.5 in
According to the current code, no safety valve on a steam heating boiler shall be smaller than
12.7 mm or 1/2 inch
According to current code, the valve seat diameter of the safety valve on a steam heating boiler must not be smaller than
12.7mm
Low pressure hot water heating boilers are those that operate below
120 degrees Celsius
The temperature reading of valves and cocks used for blow-off or drain purposes on a steam out hot water heating boiler shall be not less than
121 degrees Celcius
The current code states that each steam heating boiler shall have one or more water gauge glass attached either directly to the boiler or to a water column by means of valve fittings not less than blank mm size
15
According to the current code, the minimum blowdown for a steam heating boiler safety valve is
15 kPa. Max is 30 kPa
The pressure control connection to a steam heating boiler taping, -, or piping to the boiler shall not be less than blank wear steel, wrought iron piping or tubing is used
15 millimeters
The water column water connection for a cast-iron sectional steam heating boiler shall be made on an end section not less than blank below the bottom connection to the water gauge glass
150 millimeters
The minimum size of the drain piping, valves and cocks of a steam out hot water heating boiler shall be
19 mm
A minimum distance from furnace to oil storage tank is
2.1 meters
For hot water boilers operating up to 400 kilopascals, a pressure relief valve opening pressure tolerance maybe as much as
20 kilopascals
The minimum pressure rating of valves and cocks used for blow-off or drain purposes on a steam out hot water heating boiler shall be at least equal to the pressure stamped on the boiler, but in no case less than
200 kPa
According to the current code, no safety relief valve on a hot water heating boiler shall be smaller than
20mm
What is the minimum size of the connecting pipes attached to his steam heating boiler
25 millimeter
For a steam heating boiler, the safety valve shall be such that, with the fuel burning equipment installed and operated at maximum capacity, the pressure cannot rise more than blank above the maximum allowable working pressure when all steam outlets are closed
35 kPa
If the safety valve on a steam heating boiler opens, what is the pressure above the maximum allowable working pressure that the boiler is allowed to rise
35 kPa
The water column drain pipe and valve on a steam heating boiler shall not be less than
51 mm
Burner light oil supply pressure range is approximately
550 - 700 kPa
Before out of migration can occur, heavy oils are heated to approximately
95 degrees Celsius
Before entering the boiler, the feed water pipe must contain
A check valve, and hey stop valve in between the check valve and the boiler
Gauge glass rupture may be caused by
A cold draft
A closed expansion tank is usually equipped with
A gage glass
A modulating pressure atomizer has its return oil flow regulated by
A modulating valve in the return line
An air atomizing compressor is usually
A positive displacement type
Oil flow rates to a modulating burner is regulated by
A return line, modulating valve
A hot water boiler is protected from overpressure by means of
A safety relief valve
What does the boiler inspector install to prevent tampering with a safety valve setting
A seal
The blowdown on a safety valve is adjusted by turning the
Adjusting ring
Oil burners can be divided into three classes
Air and steam atomizing burners. Mechanical or pressure atomizing burners. And centrifugal or rotary cup burners
The purpose of the small vent valve or cock on top of the shell or on top of the water column on most boilers is to allow
Air to escape whole the boiler is being filled.
The term fitting is defined in
Alberta pressure equipment safety regulation
Water column supply line crosses will
Allow for piping cleaning and inspection.
An expansion tank is used to
Allow for the expansion of the water
On a multiple steam heating boiler system, a stop valve must be placed at each boiler Outlet valve to
Allow the boiler to be isolated from the system
Boilers are designed with more combustion gas passes
Allowing more heat to be absorbed from the combustion gases increasing boiler efficiency
The air released from the water in the closed expansion tank type hot water heating system is directed to the
Expansion tank
Cast iron boiler sections maximize heat transfer by
Exposing as large a surface as possible to the hot gases
True or false. Steel plate heating boilers use normal tubes to allow the combustion gases to flow through the boiler
False. They use fire tubes with thin steel strips installed on the inside of the tubes to promote a swirling motion to the gas
A reason for preferring copper tubing in a tubular boiler is
Faster heat transfer rate
In order to maintain gas velocity throughout all boiler passes a fire tube boiler have
Fewer tubes in each pass so that tubes of the same size can be used
When the hot combustion gases travel through boiler tubes which are surrounded by water, the boiler is called a
Fire tube boiler
A stop valve is fitted between the boiler and the feed water check valve
For isolation and to create a positive shut-off
When a packaged fire tube boiler is used as a hot water unit
Forced circulation is required
According to the current code, the scales on a pressure gage for a steam heating boiler shall be graduated between one of the following
From 200 to 414 kPa
Atmospheric burners are used for
Gas stoves, hot water heaters, heating furnaces and many heating boilers
Boiler outlet valves are usually
Gate valves because of their low resistance to flow
The venturi tube in the atmospheric burner mixing head has a
Gradually increasing cross-sectional area
In order to ensure a safety valve seats properly, it uses
Guides and bushings
A hot water tank is not considered to be a heating boiler unless one of the following is exceeded
High capacity greater than 454 liters. A temperature greater than 93 degrees Celsius. An energy input of greater than 58.6 kilowatts
One of the reasons that industrial type watertube boilers are seldom selected for low-pressure heating plants
High cost
A refractory burner disadvantage is
High initial cost
When the water connection between the boiler and the gage glass becomes plugged, the water level in the glass will eventually show a level that is
Higher than level in the boiler.
Regarding fire to boilers, HRT stands for
Horizontal return tubular
The purpose of the pipe siphon installed between the boiler and the pressure gage is to prevent
Hot steam from entering the gage.
A boiler feedwater stop valve
I'd used to isolate the feedwater line
boiler stop valve shall be
Identified with durable tags
LP boiler safety valves can be repaired
In Canada, provincial regulations state By a qualified boiler operator after permission from the inspector. Otherwise only from the manufacturer.
To increase the opening pressure of a safety valve
Increase spring compression
Boiler water legs
Increase the heating surface
An operator should check that a boiler safety valve will open at its set pressure by
Increasing the boiler pressure until the valve opens, noting the pressure on the pressure gage when the valve opened
The purpose of the test connection on a boiler pressure gage is to
Install a boiler inspectors pressure gage
A solenoid type fuel valve
Is held closed by fuel pressure
An inspectors test connection
Is not mandatory on LP boilers
When using a dead weight tester, the effect of friction
Is reduced by rotating the platform
When a closed type expansion tank on a hot water boiler is completely filled with water, and the water in the system is raised in temperature so that it expands, the result will be that the
Pressure build-up opens the safety relief valve
On a steam heating boilers, the safety valve test lever must not be used unless
Pressure is at least up to 34 kPa
The purpose of the deflector vanes in the center of a ring burner are to
Promote turbulence of gas and air mixture.
The main function of a gas burner is to
Provide intimate mixing of gas with combustion air
The main function of a gas burner is
Provision of air fuel contact
In order to prevent the possibility of a furnace explosion, it is important that the furnace is blank before the ignitor is energized and fuel is supplied to the burner nozzles
Purged
Sectional cast iron boiler sections are connected with
Push nipples
The Steam and water spaces of a cast-iron sectional boiler are connected by
Push nipples
The quick closing valves on the water gauge only require a blank turn of the valve spindle to change the valve from full open to full closed
Quarter
The use of bent tube boiler design allows the furnace wall to be lined with tubes, thereby exposing more of the heating Surface 2
Radiant heat
An outside screw and yoke valve
Readily shows its position
Blank burner haeds are most common for use in heating boilers
Rectangular
An atmospheric burner head which is very popular on heating boilers is the
Rectangular type
All boiler fittings not properly or clearly identified should be
Rejected
A fitting that is not clearly identified should be
Rejected completely
Quick closing gage glass valves
Require 90 degrees for full travel
Packaged fire tube boilers
Require relatively small building volumes
A very popular packaged boiler gas burner is the
Ring burner
The boiler steam outlet stop valve should be a
Rising stem gate valve
The prime importance of boiler fittings is
Safety
An advantage of a packaged low pressure tubular or water tube boiler is
Safety due to the low volume of water it contains
The following fittings should be found on a steam heating boiler
Safety valve, water gage glass, low water cutoff
The Forerunner of the modern packaged fire tube boiler was the
Scotch Marine boiler
An atmospheric premix burner has air entering around the burner that is termed
Secondary air
The bent tube boiler designs allows the tubes to be attached radially on the outside of the
Shell or drum
When installing a siphon, it
Should be first filled with water
Large capacity burners
Should have minimum flow on ignition
If you found the safety valve on your heating boiler stuck in the closed position while the boiler was I operation, the best thing to do is
Shut down the boiler and repair or replace the safety valve.
In a vertical sectional boiler, the sections are placed
Side by side
As essential fitting between the boiler and the steam pressure gage is a
Siphon
The advantage of motorized or hydramotor gas valve is that the valve opens blank, thus preventing furnace puff
Slowly
A relief valve is placed on the discharge of a fuel oil pump
So burner design pressure is not exceeded
Hot water heating boilers have stop valves in their Inlet and Outlet piping
So that the boiler can be drained without draining the system
Low pressure boilers are made of
Steel and cast iron
A fire tube boiler commonly used for hot water heating systems in residences and small apartments is the
Steel plate vertical unit
One of the advantages of the refractory gas burner is
The air and gas mixture is thoroughly preheated before it enters the furnace
When a closed expansion tank is used in the system is cold
The auto-fill of valve will maintain a system minimum pressure
A cast iron boiler Advantage is
The choice of assembly locations
Blowdown of a safety valve is defined as
The difference between opening and closing pressures
A packaged tubular steam boiler Austin has a steel sheeting in front of the water wall tubes due to
The erosive action of the flame
When the gauge glass nuts are leaking
The glass should be isolated and depressurized before tightening,
An indication of a pressure gage not performing properly is
The needle not returning to zero on depressurizing
A multi burner cluster has secondary and tertiary nozzles ignited by
The primary burner
Can a hot water system, if the pressure pointer on a pressure temperature indicator Falls below the altitude pointer, what does this mean
The system is not full of water
If a heating boiler with an automatic feed water system requires a large amount of water to be fed manually, this may indicate
There is probably a leak in the system
Hot water heating boilers must be equipped with a
Thermometer
Which of the following fittings would you expect to find on a hot water heating boiler
Thermometer, safety relief valve, blow off or drain valve.
In a low-pressure serpentine watertube boiler, the serpentine tubes are attached to upper and lower headers with blank connections
Threaded
A fuel filter consists of
Three main parts
The Steam and water spaces of a cast-iron sectional boiler are held together by
Tie rods
Gauge glass may be surrounded by a number of thin metal rods
To protect the glass
Purpose of hairspring on bourdon tube gage
To take up any backlash or play between teeth of the pinion gear
According to current code, for what distance from a boiler shall a blow-off pipe be full size
To the point of discharge
Initially, the fire tube boiler was not up to manufacturing expectations because
Too many equipment suppliers were involved in its manufacture
