High Pressure Boilers 2

An employer is required to identify any confined space because it is necessary to ensure the safety and well-being of employees. Confined spaces can pose various risks such as limited entry and exit points, poor ventilation, and potential for hazardous substances or conditions. Identifying these spaces allows the employer to implement appropriate safety measures, such as providing proper training, equipment, and emergency procedures, to prevent accidents and protect the workers.

Proper training prior to use is one of the most important requirements of any breathing apparatus. This is because using a breathing apparatus without proper training can be dangerous and ineffective. Training ensures that users understand how to properly wear and use the apparatus, as well as how to respond to any emergencies or malfunctions that may occur. It also helps users to develop the necessary skills and knowledge to use the apparatus effectively in different situations. Without proper training, users may not be able to use the breathing apparatus correctly, which can compromise their safety and the effectiveness of the apparatus.

When isolating a motor for maintenance, it is important to take multiple safety precautions. Removing the fuses ensures that there is no electrical power going to the motor. Installing a lockout clamp on the breaker handle prevents anyone from accidentally turning the power back on. Placing a "do not operate" tag on the breaker serves as a visual reminder to others that maintenance is being performed and the motor should not be operated. Doing all of these steps together ensures maximum safety during maintenance.

The pressure in the steam header will be the same as the pressure in each of the boilers, which is 18.85 psi. This is because the steam header is connected to the boilers and the pressure will equalize throughout the system. Therefore, the correct answer is 18.85 psi.

The correct answer is boiler operator. Boiler operators are responsible for the day-to-day operation and maintenance of boilers. They are trained to monitor and inspect boilers regularly to ensure they are functioning safely and efficiently. Inspectors may conduct periodic inspections, but it is the boiler operator's responsibility to perform frequent inspections to identify any potential issues and take appropriate actions. The boss and contractor may have supervisory roles, but the primary responsibility lies with the boiler operator.

A pressure welder is qualified to do a weld repair on boilers and pressure vessels because they have the necessary skills and knowledge to perform welding work on these specific structures. Welding on boilers and pressure vessels requires expertise in dealing with high temperatures and pressures, as well as knowledge of specific welding techniques and safety protocols. A pressure welder would have received the appropriate training and certification to ensure they can safely and effectively carry out weld repairs on boilers and pressure vessels.

A black-light is a device that emits ultraviolet (UV) light, which is used to detect fine cracks when used in combination with a fluorescent penetrant. When the fluorescent penetrant is applied to the surface being inspected, it seeps into any cracks or defects. When the black-light is then shone onto the surface, the UV light causes the penetrant to emit a visible fluorescent glow, making any cracks or defects easily visible to the inspector. Therefore, a black-light is the device used to detect fine cracks when combined with a fluorescent penetrant.

After completing the isolation of equipment, it is important to enter the completed isolation's in the log book. This is necessary to document and record the isolation process for future reference and to ensure that all necessary steps have been taken to isolate the equipment properly. The log book serves as a record of the isolation and helps in maintaining a clear and organized record of the equipment's status and maintenance activities. It also helps in communication and coordination among different personnel involved in the process.

When the fuel percentage is below the lower flammable limit, the mixture is said to be "lean." A lean mixture refers to a fuel-air mixture that contains a higher proportion of air compared to fuel. In this case, there is not enough fuel present to support combustion efficiently. This can result in a weak or incomplete burn, leading to decreased power output and potentially causing engine misfires or other performance issues.

Employees must wear self-contained breathing apparatus when entering an area where there is a threat to life or health due to reduced oxygen content. This is important because reduced oxygen levels can lead to asphyxiation or other serious health risks.

A confined space refers to an area with limited access and restricted movement. Such spaces often lack proper ventilation and can pose various hazards, including the risk of suffocation, exposure to toxic gases, or the potential for fires or explosions. These factors make a confined space a life-threatening environment, as individuals may face serious injuries or even death if proper precautions are not taken.

Before entering any confined space, it is good practice to plan the entry using a confined space checklist. This checklist helps ensure that all necessary precautions and safety measures are taken before entering the confined space. It helps identify potential hazards, assess the risks involved, and determine the necessary equipment and procedures for a safe entry. By following a confined space checklist, workers can effectively plan and prepare for the entry, minimizing the risks and ensuring their safety inside the confined space.

When a steam boiler is taken out of service and allowed to cool down, opening the vent valve on the steam drum prevents a vacuum from occurring. As the steam cools and condenses, it creates a negative pressure inside the boiler. This negative pressure can cause the boiler to collapse or implode, leading to potential damage and hazards. By opening the vent valve, the negative pressure is relieved, preventing the occurrence of a vacuum and ensuring the boiler remains safe during the cooling process.

When working with chemicals or acids, it is important to have proper eye protection to prevent any potential damage or injury. Safety glasses and goggles provide a certain level of protection, but they may not fully cover the entire face. On the other hand, a face shield offers complete coverage and acts as a barrier between the eyes and any hazardous substances. It provides additional protection by covering not only the eyes but also the entire face, including the nose and mouth. Therefore, a face shield is the most suitable choice for eye protection when working with chemicals or acids.

The responsibility of ensuring the complete isolation of a piece of equipment prior to maintenance lies with the operating and maintenance department. This department is responsible for both the operation and maintenance of the equipment, and it is crucial for them to ensure the equipment is isolated to prevent any accidents or injuries during maintenance procedures. The plant safety committee may have a role in overall safety protocols, but the specific task of isolating equipment falls under the operating and maintenance department's jurisdiction.

To protect driven equipment from damage, the first step should be to isolate the driver. This means disconnecting the power source or shutting down the machine that is driving the equipment. By doing so, the driven equipment will no longer receive power or be in motion, reducing the risk of damage or accidents. Closing the discharge valve or placing a lock on the drain valve may be necessary steps depending on the situation, but isolating the driver is the most important initial action to take. Removing the belts may also be necessary, but it is not the first step to protect the equipment.

The question asks about an item that must not be considered when preparing vessel entry permits. The correct answer is "has the head of the plant safety dept. being notified." This is because notifying the head of the plant safety department is an important step in ensuring safety and compliance, and it should be considered when preparing vessel entry permits. Therefore, this option is the one that does not belong in the list of items to consider.

When a person is unsure about the safety of a piece of equipment, the best course of action is to ask a qualified worker to indicate and explain the points of isolation. This is important because a qualified worker will have the knowledge and expertise to identify potential hazards and ensure that the necessary safety measures, such as isolation procedures, are in place. By seeking guidance from a qualified worker, the person can ensure that they have accurate information and can proceed with the work safely.

The correct answer is 1 in. This means that the minimum clearance required for a hard hat suspension is 1 inch. This clearance is necessary to ensure that the hard hat is able to effectively protect the wearer's head from any potential impact or falling objects. Anything less than 1 inch may compromise the safety and effectiveness of the hard hat.

The ignition temperature of a fuel and air mixture refers to the lowest temperature at which the mixture will burn. This means that once the temperature reaches the ignition temperature, the fuel and air mixture will undergo combustion and sustain a fire.

In order for the gage glass to accurately display the water level, it is necessary to remove any obstructions or debris that may be present in the connections to the gage glass and water column. This process is called "blowing down" and ensures that the connections are clear and free of any blockages that could interfere with the accurate measurement of the water level.

Gas cylinder valves are normally constructed of brass because brass is a durable and corrosion-resistant material. It can withstand the high pressures and extreme temperatures associated with gas cylinders. Brass also has good sealing properties, ensuring a tight seal between the valve and the cylinder to prevent gas leaks. Additionally, brass is malleable, making it easier to manufacture and shape into the necessary valve components.

During an internal inspection of a boiler, it is important to examine the waterside through all the handhole doors to check for tube pitting. Tube pitting refers to the corrosion or erosion of the tubes inside the boiler. This can lead to leaks or failures in the system, compromising its efficiency and safety. By inspecting the waterside, any signs of tube pitting can be identified and appropriate actions can be taken to prevent further damage or accidents.

If the main burner goes out during the warm-up period of a heating boiler, it is important to shut down the boiler immediately to prevent any further damage or safety hazards. Closing the fuel valves is necessary to stop the supply of fuel to the burner. After shutting down the boiler and closing the fuel valves, the operator should then determine the cause of the problem to address and fix it before attempting to restart the boiler. This ensures that any underlying issues are resolved and prevents the problem from recurring. Checking the altitude gauge to ensure there is enough water in the system is not relevant to addressing the issue of the main burner going out.

A hydrostatic test is a method used to check the structural integrity and strength of a pressure vessel, such as a boiler. It involves filling the vessel with a liquid, usually water, and pressurizing it to a specific level. This test is typically done with water pressure because water is readily available, inexpensive, and non-reactive. Using compressed oxygen or steam pressure could be dangerous and potentially cause explosions. Compressed air may not provide sufficient pressure for an accurate test.

Closing the cylinder valve before disconnecting an empty cylinder from a manifold system is necessary to prevent air from entering the cylinder. This is important because introducing air into the cylinder can contaminate the gas inside and affect its purity. By closing the cylinder valve, any potential air ingress is blocked, ensuring the integrity of the gas inside the cylinder is maintained.

The external inspection of a boiler includes checking the valves to ensure they are in good operating condition. This is important because valves control the flow of steam and water within the boiler system. If the valves are not functioning properly, it can lead to issues such as leaks, pressure build-up, or inadequate control of steam flow. Therefore, it is necessary to inspect the valves during the external inspection to ensure they are in good working order and prevent any potential problems.

The maximum operating temperature in a hot water heating boiler should never exceed 250%. This is because exceeding this temperature can lead to overheating and potential damage to the boiler system. It is important to maintain a safe operating temperature to ensure the longevity and efficiency of the boiler.

The pressure relief valve on a hot water heating boiler should be set at 25% above the operating pressure to ensure that the pressure is released before it reaches dangerous levels. This allows for a safety margin and helps prevent the boiler from becoming overpressurized, which could lead to a potential explosion or damage to the system.

If a new boiler is not properly boiled out, it may result in a foaming condition occurring. This is because during the boiling out process, any impurities or contaminants in the boiler are removed. If this process is not done correctly, these impurities can cause foaming in the boiler water, leading to various issues such as reduced heat transfer, water level fluctuations, and potential damage to the boiler system.

Boiling out boilers is done with an alkaline solution because alkaline solutions are effective in removing scale and deposits that accumulate inside boilers. Alkaline solutions have high pH levels, which helps to dissolve and break down the deposits, making it easier to clean the boilers. Acidic solutions, on the other hand, can cause corrosion and damage to the boiler, while neutral pH or liquid solutions may not have the necessary cleaning properties to effectively remove the deposits.

Before starting up a hot water boiler, it is crucial to ensure that the boiler has a valid inspection certificate. This certificate ensures that the boiler has been inspected and meets the necessary safety standards. It signifies that the boiler is in proper working condition and has been approved for operation. Without a valid inspection certificate, there may be potential safety hazards or issues with the boiler that could pose risks to individuals or property. Therefore, it is essential to have a valid inspection certificate before starting up a hot water boiler.

The filter type respiration with the proper color code will effectively protect against mineral dusts. This means that the filter is designed to trap and prevent the inhalation of small particles of minerals, such as dust from construction sites or mining operations. This type of filter is specifically designed to provide a barrier against these particles and ensure that they do not enter the respiratory system, protecting the individual from potential health hazards associated with mineral dust inhalation.

To prepare a boiler for an internal and external inspection, the first step is to isolate the drain and lock out the boiler. This is important to ensure the safety of the inspector and prevent any accidents or injuries. By isolating the drain, any remaining water or steam in the boiler can be safely drained out before the inspection. Locking out the boiler ensures that it cannot be operated while the inspection is taking place, minimizing the risk of any potential hazards. Ventilating the enclosure spaces and notifying the boiler inspector are also important steps in the preparation process, but they are not the first step.

The final step in replacing a firetube is conducting a hydro-static test. This test is performed to ensure that the newly replaced firetube is properly sealed and can withstand the pressure of the boiler. By filling the boiler with water and pressurizing it, any leaks or weaknesses in the firetube can be identified. This step is crucial to ensure the safety and efficiency of the boiler system before it is put back into operation.

The reason why superheater vents are usually opened before firing a boiler is to prevent overheating of the superheater. By opening the vents, any trapped air or steam in the superheater can escape, allowing for proper circulation and preventing the superheater from becoming too hot. This helps to maintain the integrity of the superheater and avoid any potential damage or failure due to excessive heat.

During the summer, when the steam heating boiler is not in use, it is recommended to drain the boiler to remove any remaining water. This prevents the water from causing corrosion or damage to the boiler during the idle period. Additionally, thoroughly drying out the boiler ensures that there is no moisture left inside, which could also lead to corrosion. Placing quick lime inside the boiler helps absorb any remaining moisture and further prevents corrosion. Finally, closing up the boiler ensures that no external moisture or contaminants enter the boiler during the shutdown period.

Washing steam should enter a tank car or tank truck slowly in order to reduce the risk of a static electricity spark. When steam enters rapidly, it can create static electricity, which can potentially cause a spark and ignite flammable substances present in the tank. By entering slowly, the risk of static electricity buildup and subsequent spark is minimized, reducing the potential for accidents or explosions.

Before entering the waterside of the boiler, it is important to test the atmosphere. This is necessary to ensure that the air inside the boiler is safe to breathe and does not contain any harmful gases or substances. Testing the atmosphere helps to prevent potential hazards and ensures the safety of the person entering the boiler.

The correct answer is that the portable gas cylinder capacity must take into account liquid expansion due to temperature change. This means that the capacity of the cylinder can change as the temperature of the gas inside fluctuates. As the temperature increases, the gas expands and takes up more space, thereby increasing the capacity of the cylinder. Conversely, as the temperature decreases, the gas contracts and takes up less space, reducing the capacity of the cylinder. It is important to consider this expansion and contraction when determining the actual capacity of the gas cylinder.

The flash point of a liquid refers to the temperature at which it will form a gas and ignite when exposed to an open flame or spark. This means that the liquid reaches a temperature at which it can vaporize and mix with air to form a flammable mixture that can burn. Therefore, the correct answer is "it will form a gas and burn."

Internal boiler cleaning is usually preceded by an internal inspection. This is because before cleaning the boiler, it is important to assess the condition of the internal components, such as tubes, pipes, and chambers, to determine the extent of the cleaning required. An internal inspection helps identify any build-up of deposits, corrosion, or other issues that may affect the boiler's performance. Once the inspection is done, appropriate cleaning methods can be employed to remove the accumulated deposits and ensure the boiler operates efficiently.

The confined space entry rules apply where the work in progress may cause the equipment being used to become a hazard. This means that in certain confined spaces, the work being done can potentially make the equipment being used dangerous or unsafe. Therefore, it is necessary to follow specific rules and guidelines to ensure the safety of workers and prevent accidents.

A gas cylinder hydrostatic test is conducted to ensure the cylinder's structural integrity and safety. During the test, the cylinder is filled with water and pressurized to a level higher than its working pressure. This test helps to identify any weaknesses or defects in the cylinder that could lead to failure. If the cylinder passes the test, a new test date is stamped on it, indicating that it is safe to use until that date. This ensures that cylinders are regularly inspected and tested to maintain their safety standards.

The pressure in a fully charged self-contained breathing apparatus is 4500 psi. This high pressure is necessary to provide enough air for the user to breathe while they are in a hazardous environment. The high pressure ensures that there is enough air to last for an extended period of time and allows the user to safely navigate through the hazardous area.

The correct answer is 20 to 1. The plug taper in a boiler should be 20 to 1, meaning that the diameter of the plug should decrease by a factor of 20 for every inch of length. This taper ensures a tight seal when the plug is inserted into the tube, preventing any leakage of steam or water. A steep taper like 20 to 1 is necessary to withstand the high pressure and temperature conditions inside the boiler.

The minimum temperature at which a hot water heating boiler should be operated to prevent flue gas condensation is 170.6 degrees Fahrenheit. Flue gas condensation occurs when the temperature of the flue gas drops below its dew point, causing water vapor to condense and potentially damage the boiler. By operating the boiler at a minimum temperature of 170.6 degrees Fahrenheit, the flue gas temperature is kept above the dew point, preventing condensation and potential damage.

The type of information not stamped on the gas cylinder is the date the cylinder was changed. This information is not typically stamped on the cylinder as it is not necessary for the safe use and handling of the cylinder. The manufacturers symbol, date the cylinder was tested for the first time, and ownership symbol are usually stamped on the cylinder to provide important information about its origin and safety standards.

Vapor pressure is the pressure exerted by the vapor phase of a substance when it is in equilibrium with its liquid phase. As the temperature increases, the vapor pressure of a liquid also increases. Therefore, at a higher temperature of 200 degrees Fahrenheit, the vapor pressure of the bottled gas would be higher compared to the other given temperatures.

The explosion was likely due to the catalytic effect of the fresh metallic surface. When a valve was opened, the fresh metallic surface could have acted as a catalyst, promoting the reaction between the flammable mixture and the surrounding air. This catalytic effect would have accelerated the reaction, leading to the explosion.