Boiler Exam 1c Minnesota: Quiz!

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  • 1/165 Questions

    What should be displayed in the boiler room

    • Vacation schedule, chemicals used, and insurance papers
    • Boiler operator lecense, certificat of inspeciton or exemption state inspector private ins.
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About This Quiz

Not just anyone can operate a boiler without proper training. The boiler exam 1C below from the Minnesota state is designed to see how qualified you are to operate a boiler. Give it a shot and see just how much you know. Give it a shot and keep reading up for the exam.

Boiler Exam 1c Minnesota: Quiz! - Quiz

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  • 2. 

    95   on a steam boiler system,   shat is the first thing a boiler operator should do when entering a boiler room?

    • A blow down the boiler

    • B check the water level in the boiler

    • check the fire in the combustion

    Correct Answer
    A. B check the water level in the boiler
    Explanation
    When entering a boiler room, the first thing a boiler operator should do is check the water level in the boiler. This is important to ensure that there is enough water to maintain proper operation and prevent overheating or damage to the boiler. By checking the water level, the operator can determine if any adjustments or actions need to be taken to maintain the correct water level and ensure the safe and efficient functioning of the boiler system.

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  • 3. 

    92what three things are required to support combustion?

    • A fuel, an arc, and time

    • B fuel, heat, and oxygen

    • C fuel, an arc, and temperature

    Correct Answer
    A. B fuel, heat, and oxygen
    Explanation
    To support combustion, three things are required: fuel, heat, and oxygen. Fuel provides the substance that will burn, heat provides the energy required to initiate and sustain the combustion process, and oxygen acts as the oxidizing agent that reacts with the fuel to release energy in the form of heat and light. Without any one of these three elements, combustion cannot occur.

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  • 4. 

    If you fail a boiler operator exam how long must you wait before you can tetest?

    • 10 DAYS

    • 30

    • 45

    • 60

    Correct Answer
    A. 30
    Explanation
    After failing a boiler operator exam, you must wait for 30 days before you can retest. This waiting period allows you to review and prepare for the exam again, ensuring that you have sufficient time to study and improve your knowledge and skills before attempting the test again.

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  • 5. 

    Draft is the difference in pressure between tow points that cause air   gases to flow

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The statement is true. Draft refers to the difference in pressure between two points that causes air or gases to flow. This pressure difference can occur due to various factors such as temperature differences, wind, or mechanical systems. Draft is commonly used in the context of ventilation systems or chimneys, where the pressure difference helps in the movement of air or gases.

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  • 6. 

    On a steam boiler system, why are bottom blow down valves installed at the lowest point of the waterside of boilers?A  to remove sludge and sedimentB  to remove make up waterC  to prevent corrosion

    • To remove sludge and sediment

    • To remove make up water

    • To prevent corrosion

    Correct Answer
    A. To remove sludge and sediment
    Explanation
    Bottom blow down valves are installed at the lowest point of the waterside of boilers to remove sludge and sediment. Over time, sludge and sediment can accumulate in the boiler, which can negatively affect its efficiency and performance. By installing bottom blow down valves at the lowest point, these impurities can be easily drained out of the system, preventing any potential damage or blockages. Regular removal of sludge and sediment helps maintain the boiler's functionality and prolong its lifespan.

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  • 7. 

    98    fuel    oxygen    and heat are required to start and sustain a fire:              

    • True

    • False

    Correct Answer
    A. True
    Explanation
    In order to start and sustain a fire, three elements are required: fuel, oxygen, and heat. Fuel provides the material that will burn, oxygen is necessary for the combustion process, and heat is needed to initiate and maintain the fire. Therefore, the statement "98 fuel oxygen and heat are required to start and sustain a fire" is true.

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  • 8. 

    Steam bolier are low pressure  when steam boiler are not over 15 psi and liquid boiler are not over 160 psi  or 250 deg

    • True

    • False

    Correct Answer
    A. True
    Explanation
    This statement is true because steam boilers are typically designed to operate at lower pressures, usually not exceeding 15 psi. On the other hand, liquid boilers, such as water boilers, can operate at higher pressures, but still not exceeding 160 psi or 250 degrees Fahrenheit. Therefore, the statement accurately describes the pressure limitations for steam and liquid boilers.

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  • 9. 

    A (RPZ) reduced pressure zone or backflow preventer prevents contaminated water from entering the domestic water supply.           

    • True

    • False

    Correct Answer
    A. True
    Explanation
    A reduced pressure zone or backflow preventer is designed to prevent contaminated water from flowing back into the domestic water supply. This device creates a physical barrier that prevents the reverse flow of water, ensuring that any potential contaminants or pollutants cannot enter the clean water supply. Therefore, the statement "A (RPZ) reduced pressure zone or backflow preventer prevents contaminated water from entering the domestic water supply" is true.

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  • 10. 

    Can a low water condition occur in a hot water heating type boiler? 

    • No, because the boiler is completely filled with water.

    • Yes, for numerous reasons

    • No , because there is water in the expansion tank

    Correct Answer
    A. Yes, for numerous reasons
    Explanation
    A low water condition can occur in a hot water heating type boiler for numerous reasons. Despite the boiler being filled with water, various factors such as leaks, improper water level control, or malfunctioning components can lead to a decrease in water level. This can result in inadequate heat transfer and potentially cause damage to the boiler.

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  • 11. 

    If wate in the gauge glass is not visible because of failure of the feed water supply, what should be done? 

    • Add water immediately through the manual fill line

    • Shut off the fuel to the burner and secure the boiler

    • Notify the boiler inspector but continue to run the boiler

    Correct Answer
    A. Shut off the fuel to the burner and secure the boiler
    Explanation
    In this situation, if the water in the gauge glass is not visible due to a failure of the feed water supply, it indicates a potential issue with the boiler. To prevent any further damage or accidents, the correct action would be to shut off the fuel to the burner and secure the boiler. This will help to prevent any potential hazards and ensure the safety of the boiler and surrounding area.

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  • 12. 

    What conditions are necessare to cause a furnace explosion?Atoo much aire b not enough air c accumulation of unburned fuel, oxygen and an igition source d to much fuel

    • Too much aire

    • Not enough air

    • Accumulation of unburned fuel, oxygen and an igition source 

    • To much fuel

    Correct Answer
    A. Accumulation of unburned fuel, oxygen and an igition source 
    Explanation
    A furnace explosion can occur when there is an accumulation of unburned fuel, oxygen, and an ignition source. This combination creates a potentially explosive environment where the fuel and oxygen can rapidly combust when ignited. The presence of too much or not enough air may affect the efficiency of combustion, but it is not the primary cause of a furnace explosion. Similarly, having too much fuel alone is not enough to cause an explosion without the presence of unburned fuel, oxygen, and an ignition source.

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  • 13. 

    The unit that shuts off the burner in the event of low water is:a  feed water pumpb  safety valvec  low water fuel cut out  d  operating contrb  safety valveol

    • Feed water pump

    • Safety valve

    • Low water fuel cut out

    • Operating control

    Correct Answer
    A. Low water fuel cut out
    Explanation
    The correct answer is "low water fuel cut out". This unit is responsible for shutting off the burner in the event of low water in the system. It is designed to prevent damage to the burner and ensure safety by cutting off the fuel supply when the water level drops below a certain threshold. The feed water pump is responsible for supplying water to the boiler, the safety valve is designed to release excess pressure, and the operating control helps regulate the overall operation of the system.

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  • 14. 

    Purpose of a safety valve on a steam boiler is to 

    • Regulate or control an even amount of steam pressure

    • Regulate the blow back

    • Prevent the pressure in a steam boiler from exceeding its maximum allowable working pressure.

    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 from exceeding its maximum allowable working pressure. This is crucial to ensure the safety of the boiler and prevent any potential damage or accidents that could occur if the pressure were to exceed safe limits. By automatically releasing excess pressure, the safety valve helps to maintain a safe and controlled operating environment for the steam boiler.

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  • 15. 

    Boilers and boiler fittings used in the state of Minnesota must be constructed to what code?

    • A N.E.C.

    • A.S.M.E.

    • City code

    • N.F.P. A

    Correct Answer
    A. A.S.M.E.
    Explanation
    Boilers and boiler fittings used in the state of Minnesota must be constructed to the A.S.M.E. code. This code, established by the American Society of Mechanical Engineers, sets the standards for the design, construction, and operation of boilers and pressure vessels. Adhering to this code ensures that the boilers and fittings meet safety requirements and operate efficiently.

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  • 16. 

    Other that a safety relief valve what other safety device should be installed on a hot water heating boiler?a.        city water fill valve  b  low water fuel cut off  c a feed water regulator.

    • City water fill valve

    • Low water fuel cut off

    • A feed water regulator

    Correct Answer
    A. Low water fuel cut off
    Explanation
    A low water fuel cut off is a safety device that should be installed on a hot water heating boiler. It is designed to shut off the fuel supply to the boiler if the water level drops below a certain point. This helps to prevent the boiler from overheating and potentially causing a dangerous situation. The low water fuel cut off helps to ensure that there is always enough water in the boiler to properly transfer heat and prevent damage to the system.

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  • 17. 

    Furnace explosings are caused by a build up of combustible gases, or vapors in the combustion chamber, what is the term used to remedy this condition?A  clearingB  modulatingC  purgingD huddling

    • Clearing

    • Modulating

    • Purging

    • Huddling

    Correct Answer
    A. Purging
    Explanation
    When a furnace experiences a build-up of combustible gases or vapors in the combustion chamber, the term used to remedy this condition is "purging." Purging involves the process of removing or flushing out the accumulated gases or vapors from the combustion chamber before igniting the furnace. This is done to ensure that any potential explosion risk is minimized and the furnace operates safely.

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  • 18. 

    In a hot water heating system what would prevent the hot water from circulation through a room heating unit? 

    • Trapped air

    • Water too hot

    • Back flow preventor valve

    Correct Answer
    A. Trapped air
    Explanation
    Trapped air can prevent the hot water from circulating through a room heating unit in a hot water heating system. When air becomes trapped in the system, it creates an airlock that blocks the flow of hot water. This can lead to reduced or no heat being delivered to the room. To resolve this issue, the trapped air needs to be released from the system through a process called bleeding or purging.

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  • 19. 

    97  what is required by statute,    by the state of Minnesota,  boiler inspection division   for all boiler rooms?

    • A a R stamp

    • B a current inspection certificates and proper boiler engineer license

    • C a boiler certificate

    Correct Answer
    A. B a current inspection certificates and proper boiler engineer license
    Explanation
    In the state of Minnesota, the boiler inspection division requires all boiler rooms to have a current inspection certificate and a proper boiler engineer license. This ensures that the boilers are regularly inspected for safety and that they are operated by qualified professionals who have the necessary knowledge and skills to handle them effectively.

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  • 20. 

    Boiler are considered low pressure when: 

    • Steam boiler are not over 15 psi and liquid boiler are not over 160 psi and 250 deg F

    • Steam boilers not over 30 psi hot water boiler not over 50 psi

    • Steam boiler not over 20 psi liquid boiler not over 100 psi 212 deg F

    Correct Answer
    A. Steam boiler are not over 15 psi and liquid boiler are not over 160 psi and 250 deg F
    Explanation
    The correct answer states that boilers are considered low pressure when steam boilers are not over 15 psi and liquid boilers are not over 160 psi and 250 deg F. This means that if the pressure in a steam boiler is below 15 psi or the pressure in a liquid boiler is below 160 psi and the temperature is below 250 deg F, then the boiler is classified as low pressure.

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  • 21. 

    If you fail a state of Minnesota boiler operators license exam ho long must you wait before you can retake the exam? 

    • 30 days

    • 20- days

    • 10 days

    Correct Answer
    A. 30 days
    Explanation
    If you fail a state of Minnesota boiler operators license exam, you must wait for 30 days before you can retake the exam.

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  • 22. 

    Draft is the difference in pressure between tow points that cause air? 

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The given statement is true. Draft refers to the difference in pressure between two points that causes air movement. It is commonly experienced when there is a flow of air due to a pressure difference, such as when a door is opened or when wind blows through an open window. The pressure difference creates a draft, which can be felt as a breeze or movement of air.

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  • 23. 

    Heat can be transferred in three ways and they are:

    • Latent heat, specific heat, sensible heat

    • Conduction , radiation, convection

    • Heat flow measured heat flow.

    Correct Answer
    A. Conduction , radiation, convection
    Explanation
    The correct answer is conduction, radiation, and convection. These are the three ways in which heat can be transferred. Conduction is the transfer of heat through direct contact between two objects or substances. Radiation is the transfer of heat through electromagnetic waves, such as from the sun. Convection is the transfer of heat through the movement of fluids, such as air or water. These three mechanisms play a crucial role in the transfer of heat and are commonly observed in various everyday situations.

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  • 24. 

    The first sequence in the series of automatic bgurner controls is:

    • Ignition

    • Purging

    • To make up the gas switch

    • Startup on low fire

    Correct Answer
    A. Purging
    Explanation
    The correct answer is purging. In the sequence of automatic burner controls, purging is the first step. Purging refers to the process of removing any residual gas or air from the combustion chamber before ignition. This is done to ensure a safe and efficient start-up of the burner. Once purging is completed, the ignition process can take place, followed by making up the gas switch and starting up on low fire.

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  • 25. 

    What action should an operating engineer take if a defect is discovered in a boiler requiring repairs not of a routine nature?

    • Notify the boiler inspector

    • Notify the sheriff

    • Notify another engineer in the plant

    Correct Answer
    A. Notify the boiler inspector
    Explanation
    If a defect is discovered in a boiler requiring repairs that are not of a routine nature, the appropriate action for an operating engineer to take would be to notify the boiler inspector. This is because the boiler inspector is responsible for ensuring the safety and compliance of boilers. By notifying the inspector, they can assess the defect and determine the necessary repairs or actions to be taken to address the issue effectively.

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  • 26. 

    65      what is recommended for boilers that will be out of service for a long time and a possibility of freezing?

    • Blank off the flanges and gag the safety valve

    • B a dry lay up

    • C wash the boiler once a week

    Correct Answer
    A. B a dry lay up
    Explanation
    A dry lay up is recommended for boilers that will be out of service for a long time and have a possibility of freezing. This involves blanking off the flanges and gagging the safety valve to prevent any moisture from entering the boiler. This method helps to protect the boiler from corrosion and damage caused by freezing temperatures. Washing the boiler once a week or other methods may not be sufficient to prevent freezing and potential damage.

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  • 27. 

    79      the three basic tpes of low pressure boiler are:

    • Y fire box, fire tube, fire flue

    • Z water channel , fire tube, updraf

    • Aa fire tube, water tube cast iron sectional

    Correct Answer
    A. Aa fire tube, water tube cast iron sectional
    Explanation
    The correct answer is "fire tube, water tube cast iron sectional." This answer correctly identifies the three basic types of low-pressure boilers. A fire tube boiler is a type of boiler where hot gases from a fire pass through one or more tubes running through a sealed container of water. A water tube boiler is a type of boiler where water circulates in tubes heated externally by the fire. Cast iron sectional boilers are made up of individual cast iron sections that are bolted together, allowing for easy assembly and disassembly.

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  • 28. 

    93      what can result if condensate is picked up with the steam as it travels through the main steam branch lines?

    • A steam bound piping

    • B water hammer

    • C steam line will be cooler

    • D steam line will be hotter

    Correct Answer
    A. B water hammer
    Explanation
    If condensate is picked up with the steam as it travels through the main steam branch lines, it can result in water hammer. Water hammer is a sudden increase in pressure caused by the rapid condensation of steam, which can lead to loud banging or knocking noises and potential damage to the piping system.

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  • 29. 

    Who does a pressure control attached to the steam space of a boiler control the burner operation?

    • Burner starts on pressure decrease stops on pressure increase

    • Starts burner on pressure increase

    • Stopes burner on pressure

    Correct Answer
    A. Burner starts on pressure decrease stops on pressure increase
    Explanation
    The pressure control attached to the steam space of a boiler is responsible for regulating the burner operation. It ensures that the burner starts when there is a decrease in pressure and stops when there is an increase in pressure. This control mechanism helps maintain a stable pressure level within the boiler, preventing any potential damage or safety hazards.

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  • 30. 

    How many ways can heat be transferred? 

    • 1

    • 2

    • 3

    • 4

    Correct Answer
    A. 3
    Explanation
    Heat can be transferred in three ways: conduction, convection, and radiation. Conduction is the transfer of heat through direct contact between objects or substances. Convection is the transfer of heat through the movement of fluids or gases. Radiation is the transfer of heat through electromagnetic waves. These three methods are the fundamental ways in which heat is transferred from one object to another.

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  • 31. 

    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?

    • Aqua stat

    • Pressure troll

    • Vapor stat

    • Flow control valve

    Correct Answer
    A. Aqua stat
    Explanation
    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 aqua stat. It is responsible for maintaining the desired temperature by activating the burner when the water temperature falls below a certain set point and shutting it off when the temperature reaches the desired level.

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  • 32. 

    In a steam boiler system, what is the term used for replacing the water that has been lost by blowng down the boiler or through leaks in the system?A  make up waterB  condensateC  feed replacement

    • Make up water

    • Condensate

    • Feed replacement

    Correct Answer
    A. Make up water
    Explanation
    Make up water refers to the water that is added to a steam boiler system to replace the water that has been lost due to blowing down the boiler or through leaks in the system. This is necessary to maintain the desired water level and ensure proper functioning of the boiler. Condensate, on the other hand, refers to the water that is formed when steam condenses, and feed replacement is not a commonly used term in this context.

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  • 33. 

    In a fire tube boiler, the water 

    • Surrounds the tubes

    • Is inside the tubes

    • Both inside and outside of the tubes

    Correct Answer
    A. Surrounds the tubes
    Explanation
    In a fire tube boiler, the water surrounds the tubes. This means that the tubes are immersed in the water, and the heat from the combustion gases passes through the walls of the tubes to heat the water. This design allows for efficient heat transfer and is commonly used in smaller, low-pressure boilers.

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  • 34. 

    77      after repair work is done on the boiler a test is used to chek for leaks:  what king of test is used?

    • R a flame scanner test

    • S accumulation tes

    • T atmospheric test

    • U hydrostatic test

    Correct Answer
    A. U hydrostatic test
    Explanation
    After repair work is done on the boiler, a hydrostatic test is used to check for leaks. This test involves filling the boiler with water and pressurizing it to a specific level. If there are any leaks, they will be detected by the water escaping from the boiler. This test is commonly used to ensure the integrity and safety of the boiler after repairs have been made.

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  • 35. 

    89      the most important safety device on a steam or liquid boiler is what? A  the steam or altitude gauge B  the water column C  the gauge glass D  the safety of safety relief valve

    • A the steam or altitude gauge

    • B the water column

    • C the gauge glass

    • D the safety of safety relief valve

    Correct Answer
    A. D the safety of safety relief valve
    Explanation
    The safety relief valve is the most important safety device on a steam or liquid boiler because it is responsible for releasing excess pressure and preventing the boiler from exploding or causing any other catastrophic damage. It is designed to automatically open when the pressure inside the boiler exceeds a certain limit, allowing the excess pressure to escape and ensuring the safety of the boiler and its surroundings. The steam or altitude gauge, water column, and gauge glass are also important components for monitoring and maintaining the proper functioning of the boiler, but the safety relief valve is the ultimate safeguard against potential disasters.

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  • 36. 

    What is the internal resistance to the flow of fuel oil?a.flash point   b viscosity  c fire point   d pour point 

    • Flash point

    • Viscosity

    • Fire point

    • Pour point

    Correct Answer
    A. Viscosity
    Explanation
    The correct answer is viscosity. Viscosity refers to the internal resistance to the flow of a fluid, in this case, fuel oil. It measures the thickness or stickiness of the oil, which affects how easily it can flow through pipes and machinery. A higher viscosity indicates a thicker oil that will flow more slowly, while a lower viscosity indicates a thinner oil that will flow more easily. Therefore, the internal resistance to the flow of fuel oil is determined by its viscosity.

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  • 37. 

    In order form a fuel to burn it must be heated to:

    • 212 f

    • At least 1000 f

    • Its ignition temperture

    Correct Answer
    A. Its ignition temperture
    Explanation
    In order for a fuel to burn, it must be heated to its ignition temperature. This is the minimum temperature at which the fuel can ignite and sustain a combustion reaction. Therefore, heating the fuel to any temperature below its ignition temperature will not result in burning.

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  • 38. 

    If a steam trap on a radiator of a steam heating system becomes water logged, what will happen? 

    • The radiator will overheat

    • The radiator will not heat the room properly

    • The steam trap will leak

    Correct Answer
    A. The radiator will not heat the room properly
    Explanation
    If a steam trap on a radiator of a steam heating system becomes waterlogged, it means that the trap is unable to effectively remove condensate from the radiator. This can result in reduced or blocked steam flow to the radiator, causing it to not heat the room properly. The waterlogged trap prevents the proper functioning of the radiator, leading to inadequate heating of the room.

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  • 39. 

    For the purpose of rating boiler horsepower for engineer license classifications only   how man sq ft of heating surface shall be considered equivalent to one boiler horsepower for conventional boilers?    

    • 2 ½sq ft

    • 10 sq ft

    • 5 sq ft

    • 5 sq ft

    Correct Answer
    A. 10 sq ft
    Explanation
    In order to rate boiler horsepower for engineer license classifications, 10 square feet of heating surface shall be considered equivalent to one boiler horsepower for conventional boilers.

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  • 40. 

    85when testing the low water fuel cutoff on a steam boiler   the burner shoud be firing why?

    • A to see if the flame pops

    • B to see if the burner shuts off

    • C to make sure the burner starts in the low fire position.

    Correct Answer
    A. B to see if the burner shuts off
    Explanation
    When testing the low water fuel cutoff on a steam boiler, the burner should be firing to see if it shuts off. This is important because the low water fuel cutoff is a safety device that shuts off the burner if the water level in the boiler drops below a certain level. By testing if the burner shuts off when the low water level is detected, it ensures that the safety mechanism is functioning properly and will prevent any potential accidents or damage to the boiler.

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  • 41. 

    Heating surface is defined as

    • A hot surface

    • The surface used for heating

    • Water on one side hot gas on the other side

    Correct Answer
    A. Water on one side hot gas on the other side
    Explanation
    The correct answer is "water on one side hot gas on the other side." This definition of heating surface refers to a surface that is used to transfer heat from hot gas to water, or vice versa. It is commonly found in boilers or heat exchangers, where the hot gas and water are separated by this surface. The heat transfer occurs through conduction, allowing the water to be heated by the hot gas on the other side of the surface.

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  • 42. 

    The mazimum temp  to be carried on a low pressure hot water boiler is

    • 210f

    • Less then 250 f

    • Less then 215

    Correct Answer
    A. Less then 250 f
    Explanation
    The correct answer is "less than 250°F." This means that the maximum temperature that can be carried on a low-pressure hot water boiler is lower than 250°F.

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  • 43. 

    How many types of heat transfer are there?

    • 1

    • 2

    • 3

    • 4

    Correct Answer
    A. 3
    Explanation
    There are three types of heat: conduction, convection, and radiation. Conduction is the transfer of heat through direct contact between objects or substances. Convection is the transfer of heat through the movement of fluids or gases. Radiation is the transfer of heat through electromagnetic waves.

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  • 44. 

    Can high pressure safety valve be used on the sam boiler for low pressure? 

    • Yes by changing the spring pressure

    • Cannot be used..

    • Only by tightening the spring pressure

    Correct Answer
    A. Cannot be used..
    Explanation
    A high pressure safety valve is specifically designed to release excess pressure in a high pressure system. It is not suitable for use in a low pressure system because it may not open at the desired pressure and may not provide adequate protection. Tightening the spring pressure may not be sufficient to convert it into a low pressure safety valve. Therefore, a high pressure safety valve cannot be used on the same boiler for low pressure.

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  • 45. 

    In a hot water heating system what would prevent the hot water from circulation through a room heating unit? 

    • Trapped air

    • Water too hot

    • Back flow preventor valve

    Correct Answer
    A. Trapped air
    Explanation
    Trapped air can prevent hot water from circulating through a room heating unit in a hot water heating system. When air gets trapped in the system, it can create air pockets that block the flow of hot water. This can result in reduced or no heat being delivered to the room. To ensure proper circulation, it is important to regularly bleed the air from the system using air vents or valves.

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  • 46. 

    When a safety valve opens and closes rapidly it is referred to as: a  chatteringb  poppingc  blow backd  pressuring

    • Chattering

    • Popping

    • Blow back

    • Pressuring

    Correct Answer
    A. Chattering
    Explanation
    Chattering is the correct answer because when a safety valve opens and closes rapidly, it creates a chattering sound. This can occur due to excessive pressure fluctuations or improper valve settings. Chattering can be detrimental as it can cause wear and tear on the valve, leading to potential failure.

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  • 47. 

    What does a flue gas analyzer measure? 

    • The percentages of carbon monoxide carbon dioxide and oxygen.

    • Amount of nitrogen in the flue gas

    • Amount of sulfur dioxide in the flue gases

    Correct Answer
    A. The percentages of carbon monoxide carbon dioxide and oxygen.
    Explanation
    A flue gas analyzer is a device used to measure the percentages of carbon monoxide, carbon dioxide, and oxygen in the flue gas. It is commonly used in industries and heating systems to ensure proper combustion and monitor the efficiency of the combustion process. By measuring these gases, the analyzer can provide valuable information about the fuel-to-air ratio, combustion efficiency, and potential pollutants emitted from the combustion process.

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  • 48. 

    The rapid burning of fuel and oxygen that results in the release of heat is called 

    • Purging

    • Atomization

    • Combustion

    Correct Answer
    A. Combustion
    Explanation
    Combustion refers to the rapid burning of fuel and oxygen, which leads to the release of heat. During combustion, the fuel reacts with oxygen in a chemical process known as oxidation, producing heat, light, and various byproducts such as carbon dioxide and water vapor. This process is commonly used in engines, power plants, and other combustion systems to generate energy.

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  • 49. 

    80      if idle boilers  are left filled with water, what precaution should be taken to prevent corrosion an oxygen pitting?

    • A keep the boiler water warm

    • B keep the boiler water properly treated

    • C blow down the boiler once a day

    • D remove chemicals from boiler water

    Correct Answer
    A. B keep the boiler water properly treated
    Explanation
    To prevent corrosion and oxygen pitting in idle boilers, it is important to keep the boiler water properly treated. Proper treatment involves adding chemicals to the water to control pH levels and prevent the formation of scale and corrosion. This helps to maintain the water quality and prevent any damage or corrosion to the boiler system. Keeping the boiler water warm (option A) may help to some extent, but it is not sufficient to prevent corrosion and oxygen pitting. Blowing down the boiler once a day (option C) can help remove impurities, but it is not enough to prevent corrosion. Removing chemicals from the boiler water (option D) would leave the water untreated and more susceptible to corrosion. Therefore, the best precaution is to keep the boiler water properly treated.

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Quiz Review Timeline (Updated): Jun 25, 2025 +

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  • Current Version
  • Jun 25, 2025
    Quiz Edited by
    ProProfs Editorial Team
  • Jan 03, 2013
    Quiz Created by
    Serviceking
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