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Questions and Answers
Before starting a new hot water boiler or after a prolonged shutdown, the first item that should be checked is:
Before starting a new hot water boiler or after a prolonged shutdown, the first item that should be checked is:
- the low water cut-off
- the circulator pump
- the temperature limit settings
- the inspection certificate (correct)
While preparing a boiler plant for start-up, there are pieces of auxiliary equipment that must be proven to work. These include:
While preparing a boiler plant for start-up, there are pieces of auxiliary equipment that must be proven to work. These include:
- feedwater supply, fuel supply, combustion air (correct)
- burner operation, boiler doors, fan ducting enclosure
- log book, operator's valid certificate, water softeners
- water test equipment, fuel supply, force draft fan
Large and complex high pressure steam plants:
Large and complex high pressure steam plants:
- needs to be tested and certified by an inspector every 6 months
- can have several different headers identified by the pressures at which they operate (correct)
- are normally operating with at pressures that varies with the demand
- have one common header so as to limit the pressure differentials
Boiler explosions may be classified as:
Boiler explosions may be classified as:
The operating pressure of a hot water heating boiler should be:
The operating pressure of a hot water heating boiler should be:
D.C. equipment battery banks will:
D.C. equipment battery banks will:
How often would you test the low level fuel cut-off on a low pressure steam heating boiler by blowing out the float chamber?
How often would you test the low level fuel cut-off on a low pressure steam heating boiler by blowing out the float chamber?
A rapidly falling water level in the boiler may be caused by:
A rapidly falling water level in the boiler may be caused by:
The most important rule in safe operation of a steam heating boiler is:
The most important rule in safe operation of a steam heating boiler is:
Cutting in steam heating boilers is somewhat different than power boilers as:
Cutting in steam heating boilers is somewhat different than power boilers as:
Boiler maintenance logs must:
Boiler maintenance logs must:
At what pressure should a hot water heating boiler operate if the relief valve is set to 750 kPa?
At what pressure should a hot water heating boiler operate if the relief valve is set to 750 kPa?
Boilers are designed to withstand internal pressure but not:
Boilers are designed to withstand internal pressure but not:
Boilers are designed to withstand internal pressure:
Boilers are designed to withstand internal pressure:
Most higher capacity boiler burners have SSOV's with proof of closure switches:
Most higher capacity boiler burners have SSOV's with proof of closure switches:
Prior to the start of the shift, it is important to:
Prior to the start of the shift, it is important to:
Some hot water system circulating pumps:
Some hot water system circulating pumps:
While the boiler is warming up it is good practice to:
While the boiler is warming up it is good practice to:
Boiler dry out means:
Boiler dry out means:
Plants that have no backup power:
Plants that have no backup power:
Flashcards
Low Water Cut-Off
Low Water Cut-Off
Ensures boiler shuts down if water level is too low.
Auxiliary Equipment Check
Auxiliary Equipment Check
Essential equipment like water test tools, fuel supply, and fans are functional before starting a boiler.
Complex Steam Plant Headers
Complex Steam Plant Headers
Differing header pressures indicate separate systems.
Types of Boiler Explosions
Types of Boiler Explosions
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Hot Water Boiler Operating Pressure
Hot Water Boiler Operating Pressure
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D.C. Battery Bank Function
D.C. Battery Bank Function
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Low Water Fuel Cut-off Test Frequency
Low Water Fuel Cut-off Test Frequency
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Rapidly Falling Water Level
Rapidly Falling Water Level
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Safe Boiler Operation
Safe Boiler Operation
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Steam Heating Boilers
Steam Heating Boilers
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Study Notes
- The first item to be checked before starting a new hot water boiler or after a prolonged shutdown is the inspection certificate.
- Auxiliary equipment that must be proven to work while preparing a boiler plant for start-up includes feedwater supply, fuel supply, and combustion air
- Large and complex high-pressure steam plants can have several different headers identified by the pressures at which they operate.
- Boiler explosions may be classified as furnace and pressure explosions.
- The operating pressure of a hot water heating boiler should be 25% below the relief valve setting.
- DC equipment battery banks will supply enough power for DC pumps to operate until equipment can be shut down safely.
- Low level fuel cut-off on a low-pressure steam heating boiler should be tested weekly by blowing out the float chamber.
- A rapidly falling water level in the boiler may be caused by a faulty feedwater level controller.
- The most important rule in the safe operation of a steam heating boiler is to maintain a normal water level.
- Cutting in steam heating boilers differs from power boilers because heating boilers are generally not equipped with non-return valves.
- Boiler maintenance logs must provide a continuous record of boiler operation, testing, and maintenance.
- A hot water heating boiler with a relief valve set to 750 kPa should operate at 562 kPa.
- Boilers are designed to withstand internal pressure but not external pressure.
- Boilers are designed to withstand internal pressure and not external pressure.
- Higher capacity boiler burners have SSOV's with proof of closure switches; in all cases, proof of closure is a pre-ignition interlock.
- Prior to the start of the shift, it is important to read and comprehend the log book.
- Some hot water system circulating pumps have stuffing boxes which need to be checked for proper amount of leakage.
- While the boiler is warming up, it is good practice to check the low water cut-off device for proper operation.
- Boiler dry out means drying out the new refractory.
- Plants that have no backup power remain dead until utility power is restored.
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