4BE3 U5 C4 Obj 1 EMH

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

EASY What is the requirement for safety watches at the boiler entrance?

Only when multiple workers are inside the boiler

Whenever someone is inside the boiler (correct)

Only during internal inspections of boilers

When the inspector is examining the waterside

What is the primary purpose of using portable lamps of 12 V or less?

To increase the visibility of surface irregularities

To reduce the amount of PPE worn by workers

To reduce the cost of lighting equipment

To eliminate the danger of electrocution to workers inside the boiler (correct)

What is the recommended type of light bulbs for use in boiler lighting?

Explosion-proof light bulbs (correct)

Fluorescent lights

High-voltage bulbs

Regular incandescent bulbs

What should be cleaned from the fireside surfaces of the boiler?

Fly ash, clinkers, and soot Signup and view all the answers

What is the typical timing for cleaning the waterside of the boiler?

After the inspector has examined it Signup and view all the answers

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 Signup and view all the answers

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 Signup and view all the answers

Why should the boiler be cooled until the pressure is 175 kPa before opening the drum vents?

To reduce the risk of steam burns Signup and view all the answers

What should be done with the non-return valve after shutting down the boiler?

It should be locked open Signup and view all the answers

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 Signup and view all the answers

What should be done to the boiler water before draining the boiler?

It should be cooled to 90°C Signup and view all the answers

Why should the boiler drums be opened in a specific order?

To prevent steam burns Signup and view all the answers

What should be done with the blowoff valves after flushing the boiler?

They should be closed and locked Signup and view all the answers

Why is it necessary to obtain a confined space entry permit before entering the boiler?

To ensure the atmosphere is safe to enter Signup and view all the answers

What should be done with the air dampers for all fans after shutting down the boiler?

They should be closed Signup and view all the answers

What is the primary purpose of an external boiler inspection?

To identify any safety concerns Signup and view all the answers

What is typically required before an external boiler inspection?

Having the boiler in operation Signup and view all the answers

What might an inspector check during an external inspection of a steam boiler?

various parameters, including leaks, hot spots, and safety valve operation Signup and view all the answers

What is typically required for an internal boiler inspection?

Removing the boiler from operation Signup and view all the answers

What might an inspector check for during an external inspection of a steam boiler?

various parameters, including water level control accuracy and venting effectiveness Signup and view all the answers

Why should the local authority be consulted before an external inspection?

For any special preparation requirements and inspection scheduling Signup and view all the answers

What is typically checked during an external inspection of a steam boiler?

various parameters, including proper burner operation and pressure gauge accuracy Signup and view all the answers

What is important for boiler operators to provide during an external inspection?

Reasonable assistance and disclosure of known boiler defects Signup and view all the answers

MEDIUM What is the primary purpose of an external boiler inspection?

To ensure the boiler operates safely Signup and view all the answers

What is required before an external boiler inspection?

The boiler in operation and access to the inspector Signup and view all the answers

During an external inspection, what might an inspector check for?

All of the above Signup and view all the answers

What is necessary before an internal inspection can begin?

Remove the boiler from operation Signup and view all the answers

Why should the local authority be consulted?

For special preparation requirements Signup and view all the answers

What is typically checked during an external inspection?

All of the above and more Signup and view all the answers

What is important for boiler operators to provide during an external inspection?

Reasonable assistance to the inspector Signup and view all the answers

What is an important aspect of an internal inspection?

A detailed examination of the fireside and waterside Signup and view all the answers

What should be done to the boiler load before operating the soot blowers?

Keep the load above 50% Signup and view all the answers

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 Signup and view all the answers

What should be done with the pulverizers in a coal-fired boiler when shutting down?

Run them until they are empty Signup and view all the answers

What is the recommended temperature for draining the boiler?

90°C Signup and view all the answers

Why should the boiler drums be opened in a specific order?

To prevent steam burns Signup and view all the answers

What should be done with the blowoff valves after flushing the boiler?

Lock them closed and tag them Signup and view all the answers

Why is it necessary to isolate the boiler before maintenance?

To prevent accidents and injuries Signup and view all the answers

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 Signup and view all the answers

Why is it necessary to ventilate the boiler before entering?

To remove any hazardous gases Signup and view all the answers

What should be done with the air dampers for all fans after shutting down the boiler?

Close them fully Signup and view all the answers

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 Signup and view all the answers

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 Signup and view all the answers

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 Signup and view all the answers

Why are flashlights usually recommended for illuminating surface irregularities during internal inspections of boilers and vessels?

They provide a more focused beam of light Signup and view all the answers

What is the typical approach to cleaning the waterside of the boiler?

It is cleaned only after the inspector has examined it Signup and view all the answers

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 Signup and view all the answers

What is the primary reason for using explosion-proof light bulbs in boiler lighting?

To reduce the risk of explosion in hazardous environments Signup and view all the answers

Why is it necessary to clean the fireside surfaces of the boiler?

To remove fly ash, clinkers, and soot that can reduce heat transfer Signup and view all the answers

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 Signup and view all the answers

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 Signup and view all the answers

What is the primary purpose of disclosing known boiler defects during an external inspection?

To ensure the inspector is aware of potential safety risks Signup and view all the answers

Why is it necessary to remove the boiler from operation before an internal inspection?

To prevent any potential hazards during the inspection Signup and view all the answers

What is typically checked during an external inspection of a steam boiler?

All of the above and more Signup and view all the answers

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 Signup and view all the answers

Why is it necessary to consult the local authority with jurisdiction before an external inspection?

To ensure compliance with regulatory requirements Signup and view all the answers

What is the purpose of checking the venting effectiveness during an external inspection?

To verify the proper functioning of the venting system Signup and view all the answers

What is typically required before an internal inspection of a boiler can begin?

The boiler must be shut down and prepared for inspection Signup and view all the answers

Why is it important for boiler operators to provide reasonable assistance to the inspector during an external inspection?

To facilitate the inspection process Signup and view all the answers

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 Signup and view all the answers

What is the purpose of reducing the boiler load before taking it offline?

To make cleaning easier when the boiler is opened Signup and view all the answers

What should be done with the pulverizers in a coal-fired boiler when shutting down?

Run them until they are empty Signup and view all the answers

Why is it necessary to isolate the boiler before maintenance?

To prevent unauthorized startup and ensure safety Signup and view all the answers

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 Signup and view all the answers

Why is it necessary to ventilate the boiler before entering?

To remove hazardous gases and ensure safe entry Signup and view all the answers

What should be done with the air dampers for all fans after shutting down the boiler?

Close them to prevent air leaks Signup and view all the answers

Why is it necessary to obtain a confined space entry permit before entering the boiler?

To ensure the safety of personnel entering the boiler Signup and view all the answers

What should be done with the blowoff valves after flushing the boiler?

Lock them closed and tag them Signup and view all the answers

Why is it necessary to lock out and tag the block valves?

To prevent unauthorized startup and ensure safety Signup and view all the answers

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

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Description

This quiz assesses your understanding of external boiler inspection procedures, ensuring safe operation and compliance with regulations.