Test Your Knowledge: Special Boiler Quiz
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The document governing boiler fitting and valves is the____code.
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ASME
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National Boiler
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Pressure Valve
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ASHRAE
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A closed vessel called a boiler is used to heat fluid, usually water. Play this informative quiz, the special boiler quiz, to see how well you know the functionality and practicality of the boiler. The quiz contains various questions ranging from easy, medium, to hard levels that will provide you with more information about the topic. If you like this See morequiz, do share it with your friends and family.
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- 2.
What conditions are necessary to cause a furnace explosion?
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Too much aire
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Not enough air
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Accumulation of unburned fuel, oxygen and an ignition source
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Too much fuel
Correct Answer
A. Accumulation of unburned fuel, oxygen and an ignition sourceExplanation
A furnace explosion can occur when there is an accumulation of unburned fuel, oxygen, and an ignition source. If there is an excess amount of unburned fuel in the furnace, it can create a highly flammable environment. Additionally, the presence of oxygen is necessary for combustion to take place. Finally, an ignition source such as a spark or flame is needed to initiate the explosion. Therefore, all three conditions - accumulation of unburned fuel, oxygen, and an ignition source - are necessary for a furnace explosion to occur.Rate this question:
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- 3.
On a steam boiler system, why are bottom blowdown valves installed at the lowest point of the waterside of boilers?
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To remove sludge and sediment
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To remove make up water
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To prevent corrosion
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To protect the boiler
Correct Answer
A. To remove sludge and sedimentExplanation
Bottom blowdown valves are installed at the lowest point of the waterside of boilers to remove sludge and sediment. Sludge and sediment can accumulate at the bottom of the boiler over time, which can lead to reduced efficiency and potential damage to the boiler. By installing bottom blowdown valves at the lowest point, these impurities can be periodically flushed out, ensuring the boiler operates at optimal conditions and minimizing the risk of corrosion and other issues.Rate this question:
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- 4.
The first and most important task for the boiler operator when entering a boiler room is to check the _____ of all boilers online.
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Water level
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Flame condition
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Pump operation
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Check valve is open
Correct Answer
A. Water levelExplanation
When entering a boiler room, the first and most important task for the boiler operator is to check the water level of all boilers online. This is crucial because maintaining the correct water level in a boiler is essential for its safe and efficient operation. If the water level is too low, it can expose the boiler's heating surfaces, leading to overheating and potential damage. On the other hand, if the water level is too high, it can cause water carryover into the steam system, leading to water hammer and other operational issues. Therefore, regularly checking and maintaining the proper water level is critical for the safe and effective functioning of the boiler.Rate this question:
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- 5.
A gauge glass can be attached to a______Column, which is attached to a boiler.
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Pressure
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Alarm
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Water
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Level
Correct Answer
A. WaterExplanation
A gauge glass can be attached to a water column, which is attached to a boiler. This allows for the monitoring and measurement of the water level in the boiler. By having a gauge glass attached to the water column, operators can easily see the water level and ensure that it is at the appropriate level for safe and efficient boiler operation.Rate this question:
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- 6.
The float chamber of the low water fuel cutoff (LWCO) is frequently blown down to prevent the_____.
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Float chamber from collecting sediment
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Electrical wiring from deteriorating
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Mercury switch from oxidizing
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Float from moving
Correct Answer
A. Float chamber from collecting sedimentExplanation
The float chamber of the low water fuel cutoff (LWCO) is frequently blown down to prevent sediment from collecting in it. This is important because if sediment collects in the float chamber, it can interfere with the proper functioning of the LWCO. The sediment can cause the float to become stuck or hinder its movement, which can lead to incorrect water level readings and potentially result in a failure of the LWCO to shut off the fuel supply when the water level is too low. Regularly blowing down the float chamber helps to prevent sediment buildup and ensures the LWCO operates effectively.Rate this question:
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- 7.
The most important valve on a boiler is the_____ Valve.
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Check
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Safety
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Blowdown
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Drain
Correct Answer
A. SafetyExplanation
The most important valve on a boiler is the safety valve because it is responsible for releasing excess pressure that could potentially cause an explosion. This valve is designed to automatically open when the pressure inside the boiler exceeds a certain limit, ensuring the safety of the boiler and its surroundings. Without a functioning safety valve, the boiler could become highly dangerous and pose a serious risk to both property and human life.Rate this question:
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- 8.
Can a low water condition occur in a hot water heating type boiler?
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No, because the boiler is completely filled with water
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Yes, for numerous reasons
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No , because there is water in the expansion tank
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For only test
Correct Answer
A. Yes, for numerous reasonsExplanation
A low water condition can occur in a hot water heating type boiler for numerous reasons. Even though the boiler is initially filled with water, it is possible for the water level to drop below the required level due to leaks, evaporation, or improper maintenance. This can lead to overheating and potential damage to the boiler. Therefore, it is important to regularly monitor the water level in the boiler and take necessary measures to prevent a low water condition.Rate this question:
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- 9.
If water in the gauge glass is not visible because of a failure of the feed water supply, what should be done?
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Add water immediately through the manual fill line
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Shut off the fuel to the burner and secure the boiler
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Notify the boiler inspector but continue to run the boiler
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Notify to the sherief
Correct Answer
A. Shut off the fuel to the burner and secure the boilerExplanation
In the given situation, if the water in the gauge glass is not visible due to a failure in the feed water supply, it indicates a potential danger. Shutting off the fuel to the burner and securing the boiler is the correct course of action to prevent any further damage or accidents. This will stop the heat source and ensure the boiler is not operating without sufficient water supply. Notifying the boiler inspector is also important for further investigation and necessary repairs.Rate this question:
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- 10.
The minimum passing score for a Minnesota engineer's license examination is______%.
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50
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60
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70
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80
Correct Answer
A. 70Explanation
The minimum passing score for a Minnesota engineer's license examination is 70%. This means that in order to obtain an engineer's license in Minnesota, a candidate must achieve a score of at least 70% on the examination.Rate this question:
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- 11.
Licenses granted must be displayed in _____________.
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The Parking lot close to the exit
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A conspicuous place in the engine or boiler room
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The chief Engineer's Office
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The plant Manager's Office
Correct Answer
A. A conspicuous place in the engine or boiler roomExplanation
Licenses granted must be displayed in a conspicuous place in the engine or boiler room. This is important for safety and compliance purposes as it allows easy visibility and access to the licenses for inspection by authorities or relevant personnel. Placing the licenses in the engine or boiler room ensures that they are readily available for verification and also serves as a reminder for the operators to adhere to the necessary regulations and procedures.Rate this question:
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- 12.
A check valve is a valve that_____.
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Shuts off flow after a predetermined time
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Allows flow in two directions
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Allows flow a regular intervals
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Allows flow in one direction only
Correct Answer
A. Allows flow in one direction onlyExplanation
A check valve is a type of valve that allows the flow of fluid or gas in one direction only. It is designed to prevent backflow or reverse flow, ensuring that the fluid or gas can only move in a single direction. This is achieved through the use of a mechanism that closes the valve when the flow tries to reverse. Check valves are commonly used in plumbing systems, oil and gas pipelines, and various industrial applications to prevent the unwanted backflow of fluids.Rate this question:
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- 13.
Other than a safety relief valve, what other safety device should be installed on a hot water heating boiler?
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City water fill valve
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Low water fuel cut out
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A feed water regulator
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One pass make sure only
Correct Answer
A. Low water fuel cut outExplanation
A low water fuel cut out is an essential safety device that should be installed on a hot water heating boiler. This device is designed to monitor the water level in the boiler and automatically shut off the fuel supply if the water level drops below a certain point. This is important because if the water level is too low, it can lead to overheating and potentially cause a boiler explosion. By installing a low water fuel cut out, it helps to prevent this dangerous situation and ensures the safe operation of the boiler.Rate this question:
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- 14.
Furnace explosions are caused by a buildup of combustible gasses or vapors in the combustion chamber. What is the term used to remedy this condition?
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Clearing
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Modeling
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Purging
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Huddling
Correct Answer
A. PurgingExplanation
Purging is the term used to remedy the condition of a build-up of combustible gasses or vapors in the combustion chamber of a furnace. Purging involves removing or clearing out these gasses by introducing a flow of fresh air or inert gas into the chamber. This process helps to prevent any potential explosions or hazards that may occur due to the accumulation of combustible substances.Rate this question:
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- 15.
On a steam or hot boiler, the safety valve or safety relief valve could be tested by?
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They do not need to be tested.
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Lifting the lever on the valve or raising the pressure until they operate
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Increase the temperature until they operate
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Decrease temperature when boiler is fire
Correct Answer
A. Lifting the lever on the valve or raising the pressure until they operateExplanation
The correct answer is lifting the lever on the valve or raising the pressure until they operate. Safety valves or safety relief valves on steam or hot boilers need to be tested periodically to ensure that they are functioning properly. This can be done by manually lifting the lever on the valve or by increasing the pressure until the valve operates and releases the excess pressure. This testing is important to ensure the safety of the boiler and prevent any potential accidents or damage.Rate this question:
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- 16.
For the purpose of the boiler and pressure vessel statutes, "a year" is considered to be a least_______hr.
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1200
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1845
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1960
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2000
Correct Answer
A. 2000Explanation
The correct answer is 2000. In the context of the boiler and pressure vessel statutes, "a year" is considered to be at least 2000 hours. This means that any equipment covered by these statutes must operate for a minimum of 2000 hours per year to comply with the regulations.Rate this question:
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- 17.
The main purpose of installing insulation on steam system piping is to_____.
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Prevent heat loss
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Give the pipe a neat appearance
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Prevent injury to personnel due to contact with the hot surfaces of the pipe
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Provide a surface that will retain paint
Correct Answer
A. Prevent heat lossExplanation
Insulation is installed on steam system piping primarily to prevent heat loss. This is important because steam carries thermal energy, and if the heat is allowed to escape from the pipes, it can result in energy wastage and reduced efficiency of the system. Insulation helps to maintain the desired temperature of the steam and prevents it from cooling down too quickly. It also helps to conserve energy and reduce operating costs.Rate this question:
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- 18.
Combustion is_____.
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Chemical combination of incompatible chemicals in contact with each other
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Chemical combination of the elements of fuel with oxygen
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Spontaneous reaction of toxic or hazardous materials
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Chemical carbon absorption process
Correct Answer
A. Chemical combination of the elements of fuel with oxygenExplanation
Combustion is the chemical combination of the elements of fuel with oxygen. During combustion, a fuel (such as wood, gasoline, or natural gas) reacts with oxygen in the presence of heat to produce carbon dioxide, water, and energy. This process is commonly used to generate heat or power in various applications, such as in engines or heating systems.Rate this question:
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- 19.
What device prevents city water from flowing back to the city supply
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Backflow Preventer
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Safety Valve
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Low water cut off
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Siphon
Correct Answer
A. Backflow PreventerExplanation
A backflow preventer is a device that prevents city water from flowing back into the city supply. It is designed to protect the public water supply from potential contaminants or pollutants that may enter the water system due to backflow. Backflow can occur when there is a change in pressure in the water supply system, causing water to flow in the opposite direction. The backflow preventer ensures that water only flows in one direction, preventing any contamination of the city water supply.Rate this question:
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- 20.
A logbook must be maintained in the boiler room by the_______.
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Chief engineer or operating engineer designee
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Owner
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Plant Manager
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Special Engineer
Correct Answer
A. Chief engineer or operating engineer designeeExplanation
A logbook must be maintained in the boiler room by the chief engineer or an operating engineer designee. This is because the logbook is a record of important information regarding the boiler's operation, maintenance, and any incidents or repairs that occur. The chief engineer or their designee is responsible for overseeing the boiler room and ensuring its proper functioning, so it is their duty to keep the logbook updated and accurate. The logbook serves as a valuable resource for tracking the boiler's performance and ensuring compliance with safety regulations.Rate this question:
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- 21.
When used, a quick-opening blowdown valve should be located_______.
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Nearest to the boiler
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On top of safety valve
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Nearest of the exit
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Close to the steam drum
Correct Answer
A. Nearest to the boilerExplanation
A quick-opening blowdown valve should be located nearest to the boiler because it is used to rapidly remove impurities and sediment from the boiler water. By placing it closest to the boiler, it allows for efficient and immediate discharge of the water, preventing any build-up of harmful substances.Rate this question:
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- 22.
The main purpose for chemically treating boiler feedwater is to_____.
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Prevent rust from forming on the boiler outside surface
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Increase heat transfer
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Produce cleaner steam
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Protect the boiler internal surfaces from the impurities in feedwater
Correct Answer
A. Protect the boiler internal surfaces from the impurities in feedwaterExplanation
The main purpose for chemically treating boiler feedwater is to protect the boiler internal surfaces from the impurities in feedwater. This is because impurities in the feedwater can cause scaling, corrosion, and fouling on the internal surfaces of the boiler, which can reduce its efficiency and lifespan. By treating the feedwater chemically, these impurities can be controlled and prevented from causing damage to the boiler.Rate this question:
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- 23.
What are trycocks used for?
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They are used to determine the water level in the boiler if the gauge glass is not working
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The quick opening valve is opened first and closed last
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Small particles of water are carried into the steam lines.
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Discharges water at a controlled rate to regulate proper chemical concentration in the boiler water.
Correct Answer
A. They are used to determine the water level in the boiler if the gauge glass is not workingExplanation
Trycocks are valves used to determine the water level in the boiler when the gauge glass is not functioning properly. By opening the trycocks, the operator can visually inspect the water level and ensure it is at the desired level for safe and efficient boiler operation. This is important as maintaining the correct water level helps prevent damage to the boiler and ensures optimal performance.Rate this question:
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- 24.
What is the unit called that controls the starting and stopping of the burner by sensing the temperature of the water in a hot water boiler?
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Aquastat
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Pressure troll
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Vapor stat
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Flow control valve
Correct Answer
A. AquastatExplanation
The unit that controls the starting and stopping of the burner by sensing the temperature of the water in a hot water boiler is called an aquastat. It is responsible for maintaining the desired temperature by regulating the burner operation based on the water temperature.Rate this question:
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- 25.
When a safety valve opens and closes rapidly it is referred to as:
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Chattering
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Popping
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Blow Back
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Pressuring
Correct Answer
A. ChatteringExplanation
Chattering is the correct answer because when a safety valve opens and closes rapidly, it produces a chattering sound. This can occur due to high pressure fluctuations or mechanical issues with the valve. Chattering can be harmful as it can cause damage to the valve and compromise its effectiveness in relieving excess pressure.Rate this question:
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- 26.
In a steam boiler system, what is the term used for replacing the water that has been lost by blowing down the boiler or through leaks in the system?
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Make up water
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Condensate
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Feed replacement
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Air supplies
Correct Answer
A. Make up waterExplanation
In a steam boiler system, "make up water" is the term used for replacing the water that has been lost by blowing down the boiler or through leaks in the system. This is necessary to maintain the desired water level and pressure in the boiler.Rate this question:
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- 27.
Purpose of a safety valve on a steam boiler is to
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Regulate or control an even amount of steam pressure
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Regulate the blow back
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Prevent the pressure in a steam boiler from exceeding its maximum allowable working pressure.
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Protect the boiler
Correct Answer
A. Prevent the pressure in a steam boiler from exceeding its maximum allowable working pressure.Explanation
The purpose of a safety valve on a steam boiler is to prevent the pressure in the boiler from exceeding its maximum allowable working pressure. This is important because if the pressure exceeds the maximum limit, it can lead to a catastrophic failure of the boiler, causing damage and potentially endangering lives. The safety valve acts as a safeguard by releasing excess pressure, ensuring that it stays within safe limits and preventing any potential accidents.Rate this question:
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- 28.
In accordance with the statutes of the State of Minnesota, one Boiler horsepower for a conventional boiler is equal to______.
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10 cu of natural gas consumed
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10 sq ft of boiler heating surface
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25 sq ft of boiler tubing
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1000 Btu per hour
Correct Answer
A. 10 sq ft of boiler heating surfaceExplanation
According to the statutes of the State of Minnesota, one Boiler horsepower for a conventional boiler is equal to 10 sq ft of boiler heating surface.Rate this question:
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- 29.
Expansion bends or joins are installed in piping systems to____.
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Allow for correct piping drainage
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Allow for pressure increases
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Allow for expansion and contraction of piping without causing damage
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Protect against water hammer damage
Correct Answer
A. Allow for expansion and contraction of piping without causing damageExplanation
Expansion bends or joints are installed in piping systems to allow for the expansion and contraction of the pipes without causing damage. As the temperature of the fluid inside the pipes changes, the pipes expand or contract. If there are no expansion joints, the pipes may become overstressed and can lead to leaks, cracks, or other forms of damage. Therefore, the purpose of these expansion joints is to accommodate the thermal expansion and contraction of the pipes, ensuring the integrity and longevity of the piping system.Rate this question:
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- 30.
Internal water treatment_____.
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Is used with low pressure boiler only
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Consists of chemicals added to the boiler feedwater
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Consists of a coagulant added to a settling tank
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Measures the ph of the feedwater
Correct Answer
A. Consists of chemicals added to the boiler feedwaterExplanation
Internal water treatment consists of chemicals added to the boiler feedwater in order to prevent scale formation, corrosion, and microbial growth. These chemicals help to maintain the quality of the water and protect the boiler and its components from damage. By adding the appropriate chemicals, the water treatment process helps to improve the efficiency and longevity of the boiler system.Rate this question:
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- 31.
What is the internal resistance to the flow of fuel oil?
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Flash Pint
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Viscosity
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Option 3
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Fire point
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Poor Point
Correct Answer
A. ViscosityExplanation
Viscosity is the correct answer because it refers to the internal resistance to the flow of fuel oil. Viscosity is a measure of a fluid's resistance to flow, and it determines how easily the fuel oil can flow through pipes, valves, and other components of a fuel system. A higher viscosity indicates a thicker and more resistant fluid, while a lower viscosity indicates a thinner and less resistant fluid. Therefore, the viscosity of fuel oil directly affects its ability to flow efficiently within a system.Rate this question:
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- 32.
Try lever test (safety valve) must be tested every _____ days?
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Performed to determine if a safety valve opens at the proper pressure within allowable tolerances and should be performed annually.
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A bent tube between the boiler and boiler fitting that provides a water seal to prevent contact with steam.
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30 days with the boiler at a minimum of 75% of the safety valve set pressure.
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The last 4 Hours
Correct Answer
A. 30 days with the boiler at a minimum of 75% of the safety valve set pressure.Explanation
The lever test, also known as the safety valve test, is performed to ensure that a safety valve opens at the correct pressure within acceptable limits. This test should be conducted annually. According to the given answer, the lever test should be performed every 30 days, with the boiler operating at a minimum of 75% of the safety valve set pressure. This frequency ensures that the safety valve is regularly checked and remains in proper working condition to prevent any potential hazards.Rate this question:
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- 33.
The chief engineer of a high-pressure boiler plant of over 200 HP must stay within the boiler room at all times during the shift.
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500 ft
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100 ft
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1500 ft
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2000 ft
Correct Answer
A. 500 ftExplanation
The chief engineer of a high-pressure boiler plant of over 200 HP must stay within 500 ft of the boiler room at all times during the shift. This distance requirement ensures that the chief engineer is in close proximity to the boiler room, allowing them to monitor and respond to any potential issues or emergencies promptly. It also ensures that the chief engineer can easily access the necessary equipment and resources in case of any maintenance or operational needs. By staying within 500 ft of the boiler room, the chief engineer can effectively oversee the operations and safety of the boiler plant.Rate this question:
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- 34.
In a boiler, heat is transferred from the burning fuel to the water by________.
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Convection, expansion, radiation
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Contraction, conduction, expansion
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Convection, conduction, radiation
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Radiation, contraction, conduction
Correct Answer
A. Convection, conduction, radiationExplanation
In a boiler, heat is transferred from the burning fuel to the water through convection, conduction, and radiation. Convection is the transfer of heat through the movement of fluids or gasses, such as the hot gasses rising and the cooler water sinking in the boiler. Conduction is the transfer of heat through direct contact, such as the hot metal of the boiler transferring heat to the water. Radiation is the transfer of heat through electromagnetic waves, such as the heat radiating from the burning fuel to the surrounding surfaces and the water.Rate this question:
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- 35.
Rules governing the construction of power boilers are set out in_____.
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ASME Code Section I
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ASME Code Section II
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ASME Code Section Viii, Division 1
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CSA B-51
Correct Answer
A. ASME Code Section IExplanation
The correct answer is ASME Code Section I. This section of the ASME Code specifically deals with the construction of power boilers. It provides guidelines and regulations for the design, fabrication, installation, inspection, and testing of power boilers. It ensures that power boilers are constructed in a safe and reliable manner, meeting all necessary standards and requirements.Rate this question:
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- 36.
A_____blowdown is performed to remove sludge from a boiler.
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Surface
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Water column
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Bottom
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Low water fuel cut off
Correct Answer
A. BottomExplanation
A bottom blowdown is performed to remove sludge from a boiler. This process involves draining a small amount of water from the bottom of the boiler to remove any sediment or sludge that may have settled there. This helps to prevent the build-up of impurities and maintain the efficiency and performance of the boiler.Rate this question:
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- 37.
Boiler baffles are used_____.
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To direct the flue gasses through the boiler furnace
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To increase the stack temperature
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In every boiler furnace
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To reduce heat transfer
Correct Answer
A. To direct the flue gasses through the boiler furnaceExplanation
Boiler baffles are used to direct the flue gasses through the boiler furnace.Rate this question:
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- 38.
The first sequence in the series of automatic burner controls is:
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Ignition
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Purging
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To make up the gas switch
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Startup on low fire
Correct Answer
A. PurgingExplanation
The correct answer is "purging" because in the sequence of automatic burner controls, purging is the first step that occurs before ignition. Purging refers to the process of removing any residual gas or air from the combustion chamber to ensure a safe and efficient ignition. Once purging is complete, the ignition process can take place, followed by making up the gas switch and finally starting up the burner on low fire.Rate this question:
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- 39.
A Special Engineer is expected to be competent, take charge of, and be responsible for the safe operation and maintenance of all classes of boiler of not more than _______ HP and their appurtenances.
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50
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100
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25
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175
Correct Answer
A. 50Explanation
A Special Engineer is responsible for the safe operation and maintenance of boilers. The maximum horsepower (HP) limit for the boilers that a Special Engineer can handle is not more than 50 HP. This means that they are expected to have the necessary competence and take charge of ensuring the safe operation and maintenance of boilers up to this horsepower capacity.Rate this question:
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- 40.
An example of the transfer of heat by radiation is_______.
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The heating effect of the sun on the earth
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Using an electric heater with a fan
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The handle of frying pan becoming hot on a stove
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Silverware becoming hot in a dishwasher
Correct Answer
A. The heating effect of the sun on the earthExplanation
Radiation is the transfer of heat energy through electromagnetic waves, such as those emitted by the sun. This process does not require a medium and can occur across empty space, as seen in the warming of the Earth's surface by solar radiation.Rate this question:
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- 41.
_____ is the flow of air or gasses of combustion caused by a difference in pressure between two points.
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Flow
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Draft
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Furnace velocity
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Uptake
Correct Answer
A. DraftExplanation
Draft is the correct answer because it refers to the flow of air or gasses of combustion caused by a difference in pressure between two points. It is commonly used in the context of ventilation systems or chimneys, where the difference in pressure creates a flow of air or gasses. The other options, such as flow, furnace velocity, and uptake, do not specifically refer to this concept of pressure-induced airflow.Rate this question:
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- 42.
When the boiler heating surface cannot be discerned, the boiler horsepower shall be determined by dividing the Btu input by__________.
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42,500
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67,000
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75,000
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150,000
Correct Answer
A. 67,000Explanation
The correct answer is 67,000. When the boiler heating surface cannot be discerned, the boiler horsepower is determined by dividing the Btu input by 67,000. This means that for every 67,000 Btu input, there is one boiler horsepower.Rate this question:
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- 43.
A hydrostatic test is a mandatory requirement when a new boiler is installed in the State of Minnesota. The test pressure requirement must not exceed _____ time, the maximum allowable working pressure.
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1.2
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1.5
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2.0
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3.0
Correct Answer
A. 1.5Explanation
The hydrostatic test is a necessary procedure for new boiler installations in Minnesota. During this test, the pressure is increased to ensure that the boiler can withstand the maximum allowable working pressure. The test pressure requirement should not exceed 1.5 times the maximum allowable working pressure. This ensures a safety margin and ensures that the boiler is capable of operating under normal conditions without any risk of failure due to excessive pressure.Rate this question:
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- 44.
When testing the LWFCO on a steam boiler, the burner should be firing-why?
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To see if the flam pops
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To see if the burner shuts off
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To make sure the burner stars in the low fire position
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To control pin in the boiler
Correct Answer
A. To see if the burner shuts offExplanation
The reason the burner should be firing when testing the LWFCO on a steam boiler is to see if the burner shuts off. This is important because the LWFCO (Low Water Fuel Cut-Off) is a safety feature that shuts off the burner if the water level in the boiler drops below a certain point. By testing if the burner shuts off when the LWFCO is activated, it ensures that the safety mechanism is functioning correctly and will prevent any potential accidents or damage caused by low water levels in the boiler.Rate this question:
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- 45.
A high pressure steam boiler is a boiler with an MAWP of more than_____psi.
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10
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15
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20
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25
Correct Answer
A. 15Explanation
A high pressure steam boiler is a boiler that is designed to operate at a maximum allowable working pressure (MAWP) of more than 15 psi. This means that the boiler is capable of generating steam at a higher pressure, which can be used for various industrial applications that require high pressure steam. A MAWP of 15 psi or higher ensures that the boiler can handle the increased pressure without any safety concerns.Rate this question:
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- 46.
Vacuum is expressed in what?
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Centimeters in hours
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5 inches
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Inches of mercury (HG)
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Pull the steam
Correct Answer
A. Inches of mercury (HG)Explanation
The correct answer is inches of mercury (HG). This is because vacuum is commonly expressed in inches of mercury (HG), which refers to the measurement of the pressure exerted by a vacuum. It is a unit of measurement used to describe the level of vacuum in various systems and is often used in industries such as engineering and physics.Rate this question:
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- 47.
In a natural draft furnace, the amount of draft is affected by the____.
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Height of the stack
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Size of the induced draft fan
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Size of the forced draft fan
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Boiler steam pressure
Correct Answer
A. Height of the stackExplanation
The correct answer is "height of the stack." In a natural draft furnace, the amount of draft (the flow of air through the furnace) is influenced by the height of the stack. A taller stack creates a greater pressure difference between the inside and outside of the furnace, resulting in a stronger draft. This helps to ensure proper combustion and efficient operation of the furnace.Rate this question:
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- 48.
The correct procedure for blowing down a high pressure boiler is to open_____.
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The quick-opening valve first and close it last
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The slow-opening valve first and close it last
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Both blowdown valves partway at first to warm up blowdown lines
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The check valve first and then glove valve
Correct Answer
A. The quick-opening valve first and close it lastExplanation
The correct procedure for blowing down a high pressure boiler is to open the quick-opening valve first and close it last. This is because the quick-opening valve allows for a rapid release of pressure and water from the boiler, which helps to remove any sediment or impurities. By opening it first, any buildup or blockages can be cleared effectively. Closing it last ensures that all the blowdown process is complete and the system is properly drained.Rate this question:
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- 49.
In order for a fuel to burn, it must be heated to:
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212 f
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At least 1000 F
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Its ignition temperature
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160 f
Correct Answer
A. Its ignition temperatureExplanation
To form a fuel to burn, it must be heated to its ignition temperature. This is the minimum temperature required for the fuel to undergo combustion and start burning. Heating the fuel to a temperature below its ignition temperature will not initiate the burning process. Therefore, the correct answer is "Its ignition temperature."Rate this question:
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Oct 15, 2024Quiz Edited by
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