69 Questions
EASY What is the requirement for safety watches at the boiler entrance?
Whenever someone is inside the boiler
What is the primary purpose of using portable lamps of 12 V or less?
To eliminate the danger of electrocution to workers inside the boiler
What is the recommended type of light bulbs for use in boiler lighting?
Explosion-proof light bulbs
What should be cleaned from the fireside surfaces of the boiler?
Fly ash, clinkers, and soot
What is the typical timing for cleaning the waterside of the boiler?
After the inspector has examined it
Why is it necessary to operate the soot blowers when the boiler load is above 50%?
To ensure the boiler is clean before it is shut down
What is the purpose of increasing the frequency of bottom blowoffs, water column blowdowns, and low water cut-off blowdowns?
To remove as much sludge and sediment from the boiler as possible
Why should the boiler be cooled until the pressure is 175 kPa before opening the drum vents?
To reduce the risk of steam burns
What should be done with the non-return valve after shutting down the boiler?
It should be locked open
Why is it important to tag all block valves that have been locked closed or locked open?
To make it easier to account for all the valves when they are removed
What should be done to the boiler water before draining the boiler?
It should be cooled to 90°C
Why should the boiler drums be opened in a specific order?
To prevent steam burns
What should be done with the blowoff valves after flushing the boiler?
They should be closed and locked
Why is it necessary to obtain a confined space entry permit before entering the boiler?
To ensure the atmosphere is safe to enter
What should be done with the air dampers for all fans after shutting down the boiler?
They should be closed
What is the primary purpose of an external boiler inspection?
To identify any safety concerns
What is typically required before an external boiler inspection?
Having the boiler in operation
What might an inspector check during an external inspection of a steam boiler?
various parameters, including leaks, hot spots, and safety valve operation
What is typically required for an internal boiler inspection?
Removing the boiler from operation
What might an inspector check for during an external inspection of a steam boiler?
various parameters, including water level control accuracy and venting effectiveness
Why should the local authority be consulted before an external inspection?
For any special preparation requirements and inspection scheduling
What is typically checked during an external inspection of a steam boiler?
various parameters, including proper burner operation and pressure gauge accuracy
What is important for boiler operators to provide during an external inspection?
Reasonable assistance and disclosure of known boiler defects
MEDIUM What is the primary purpose of an external boiler inspection?
To ensure the boiler operates safely
What is required before an external boiler inspection?
The boiler in operation and access to the inspector
During an external inspection, what might an inspector check for?
All of the above
What is necessary before an internal inspection can begin?
Remove the boiler from operation
Why should the local authority be consulted?
For special preparation requirements
What is typically checked during an external inspection?
All of the above and more
What is important for boiler operators to provide during an external inspection?
Reasonable assistance to the inspector
What is an important aspect of an internal inspection?
A detailed examination of the fireside and waterside
What should be done to the boiler load before operating the soot blowers?
Keep the load above 50%
What is the purpose of increasing the frequency of bottom blowoffs, water column blowdowns, and low water cut-off blowdowns?
To remove sludge and sediment from the boiler
What should be done with the pulverizers in a coal-fired boiler when shutting down?
Run them until they are empty
What is the recommended temperature for draining the boiler?
90°C
Why should the boiler drums be opened in a specific order?
To prevent steam burns
What should be done with the blowoff valves after flushing the boiler?
Lock them closed and tag them
Why is it necessary to isolate the boiler before maintenance?
To prevent accidents and injuries
What should be done with the chemical feed pumps and boiler feed pumps when shutting down the boiler?
Shut them down and lock them out
Why is it necessary to ventilate the boiler before entering?
To remove any hazardous gases
What should be done with the air dampers for all fans after shutting down the boiler?
Close them fully
What is the primary purpose of having workers and safety watch personnel trained in confined space entry and rescue?
To provide a safe emergency response in case of an accident
Why is it important to use portable lamps of 12 V or less, with current supplied from transformers or batteries?
To minimize the risk of electrical shock inside the boiler
What is the primary reason for cleaning the fireside surfaces of the boiler?
To reduce the risk of explosion due to accumulated fly ash, clinkers, and soot
Why are flashlights usually recommended for illuminating surface irregularities during internal inspections of boilers and vessels?
They provide a more focused beam of light
What is the typical approach to cleaning the waterside of the boiler?
It is cleaned only after the inspector has examined it
HARD What is the primary reason for having a trained safety watch at the boiler entrance during internal inspections?
To monitor the atmosphere inside the boiler for potential hazards
What is the primary reason for using explosion-proof light bulbs in boiler lighting?
To reduce the risk of explosion in hazardous environments
Why is it necessary to clean the fireside surfaces of the boiler?
To remove fly ash, clinkers, and soot that can reduce heat transfer
What is the primary reason for wearing protective clothing, protective eyewear, and gloves during internal inspections?
To provide an additional layer of protection against hazards
Why is it necessary to use portable lamps with a voltage of 12 V or less during internal inspections?
To reduce the risk of electrocution
What is the primary purpose of disclosing known boiler defects during an external inspection?
To ensure the inspector is aware of potential safety risks
Why is it necessary to remove the boiler from operation before an internal inspection?
To prevent any potential hazards during the inspection
What is typically checked during an external inspection of a steam boiler?
All of the above and more
What is the purpose of checking the pressure gauge accuracy during an external inspection?
To ensure the boiler is operating within its designated pressure range
Why is it necessary to consult the local authority with jurisdiction before an external inspection?
To ensure compliance with regulatory requirements
What is the purpose of checking the venting effectiveness during an external inspection?
To verify the proper functioning of the venting system
What is typically required before an internal inspection of a boiler can begin?
The boiler must be shut down and prepared for inspection
Why is it important for boiler operators to provide reasonable assistance to the inspector during an external inspection?
To facilitate the inspection process
What is the primary reason for operating the soot blowers when the boiler load is above 50%?
To ensure effective cleaning of the fireside surfaces
What is the purpose of reducing the boiler load before taking it offline?
To make cleaning easier when the boiler is opened
What should be done with the pulverizers in a coal-fired boiler when shutting down?
Run them until they are empty
Why is it necessary to isolate the boiler before maintenance?
To prevent unauthorized startup and ensure safety
What should be done with the chemical feed pumps and boiler feed pumps when shutting down the boiler?
Shut them down and lock them out
Why is it necessary to ventilate the boiler before entering?
To remove hazardous gases and ensure safe entry
What should be done with the air dampers for all fans after shutting down the boiler?
Close them to prevent air leaks
Why is it necessary to obtain a confined space entry permit before entering the boiler?
To ensure the safety of personnel entering the boiler
What should be done with the blowoff valves after flushing the boiler?
Lock them closed and tag them
Why is it necessary to lock out and tag the block valves?
To prevent unauthorized startup and ensure safety
Study Notes
External Boiler Inspection
- Determines if a boiler can operate safely, involving external observation and operational checks
- No preparation required, except having the boiler in operation and providing access to the inspector
- Boiler operators must provide reasonable assistance to the inspector and disclose any known boiler defects
- Inspector may check for:
- Leaks
- Hot spots
- Safety valve operation, set point, and capacity
- Proper burner operation, including air damper, flame pattern, and firing rate control valve function
- Set point accuracy of limit controls, such as pressuretrol and high pressure cut-off
- Water level control accuracy and low water cut-off function
- Pressure gauge accuracy
- Venting effectiveness and chimney/breaching condition
- Correct pressure rating of replacement fittings
- Flue gas temperature
- Housekeeping, general maintenance, and condition
- Up-to-date log book entries
Preparation for Internal Inspection
- Involves a detailed examination of the fireside and waterside of a boiler
- Requires the boiler to be removed from operation and extensive preparation
- Steps to prepare for internal inspection:
- Operate soot blowers to clean fireside surfaces
- Increase frequency of bottom blowoffs, water column blowdowns, and low water cut-off blowdowns
- Reduce load on boiler and cool down to 175 kPa
- Shut down, isolate, and lock out chemical feed pumps, boiler feed pumps, and other equipment
- Open drum vents, isolate boiler, and lock out valves
- Close air dampers for all fans
- Block in and lockout steam supply to various equipment
- Open circuit breakers for motors and pumps
- Tag all locked valves and circuit breakers with "DO NOT OPERATE" tag
- Cool boiler water to 90°C, then open blowdown valves and drain boiler
- Open boiler drums, starting with steam drum manhole covers
- Flush out boiler with high-pressure water hose
- Open fireside access door and ventilate area
- Obtain confined space entry permit and follow procedures
External Boiler Inspection
- Determines if a boiler can operate safely, involving external observation and operational checks
- No preparation required, except having the boiler in operation and providing access to the inspector
- Boiler operators must provide reasonable assistance to the inspector and disclose any known boiler defects
- Inspector may check for:
- Leaks
- Hot spots
- Safety valve operation, set point, and capacity
- Proper burner operation, including air damper, flame pattern, and firing rate control valve function
- Set point accuracy of limit controls, such as pressuretrol and high pressure cut-off
- Water level control accuracy and low water cut-off function
- Pressure gauge accuracy
- Venting effectiveness and chimney/breaching condition
- Correct pressure rating of replacement fittings
- Flue gas temperature
- Housekeeping, general maintenance, and condition
- Up-to-date log book entries
Preparation for Internal Inspection
- Involves a detailed examination of the fireside and waterside of a boiler
- Requires the boiler to be removed from operation and extensive preparation
- Steps to prepare for internal inspection:
- Operate soot blowers to clean fireside surfaces
- Increase frequency of bottom blowoffs, water column blowdowns, and low water cut-off blowdowns
- Reduce load on boiler and cool down to 175 kPa
- Shut down, isolate, and lock out chemical feed pumps, boiler feed pumps, and other equipment
- Open drum vents, isolate boiler, and lock out valves
- Close air dampers for all fans
- Block in and lockout steam supply to various equipment
- Open circuit breakers for motors and pumps
- Tag all locked valves and circuit breakers with "DO NOT OPERATE" tag
- Cool boiler water to 90°C, then open blowdown valves and drain boiler
- Open boiler drums, starting with steam drum manhole covers
- Flush out boiler with high-pressure water hose
- Open fireside access door and ventilate area
- Obtain confined space entry permit and follow procedures
External Boiler Inspection
- Determines if a boiler can operate safely, involving external observation and operational checks
- No preparation required, except having the boiler in operation and providing access to the inspector
- Boiler operators must provide reasonable assistance to the inspector and disclose any known boiler defects
- Inspector may check for:
- Leaks
- Hot spots
- Safety valve operation, set point, and capacity
- Proper burner operation, including air damper, flame pattern, and firing rate control valve function
- Set point accuracy of limit controls, such as pressuretrol and high pressure cut-off
- Water level control accuracy and low water cut-off function
- Pressure gauge accuracy
- Venting effectiveness and chimney/breaching condition
- Correct pressure rating of replacement fittings
- Flue gas temperature
- Housekeeping, general maintenance, and condition
- Up-to-date log book entries
Preparation for Internal Inspection
- Involves a detailed examination of the fireside and waterside of a boiler
- Requires the boiler to be removed from operation and extensive preparation
- Steps to prepare for internal inspection:
- Operate soot blowers to clean fireside surfaces
- Increase frequency of bottom blowoffs, water column blowdowns, and low water cut-off blowdowns
- Reduce load on boiler and cool down to 175 kPa
- Shut down, isolate, and lock out chemical feed pumps, boiler feed pumps, and other equipment
- Open drum vents, isolate boiler, and lock out valves
- Close air dampers for all fans
- Block in and lockout steam supply to various equipment
- Open circuit breakers for motors and pumps
- Tag all locked valves and circuit breakers with "DO NOT OPERATE" tag
- Cool boiler water to 90°C, then open blowdown valves and drain boiler
- Open boiler drums, starting with steam drum manhole covers
- Flush out boiler with high-pressure water hose
- Open fireside access door and ventilate area
- Obtain confined space entry permit and follow procedures
This quiz assesses your understanding of external boiler inspection procedures, ensuring safe operation and compliance with regulations.
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