Test Your Knowledge: Special Boiler Quiz
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 quiz, do share it with your friends and family.
Special Boiler Questions and Answers
- 1.
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.
- A.
50
- B.
100
- C.
25
- D.
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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- 2.
A gauge glass can be attached to a______Column, which is attached to a boiler.
- A.
Pressure
- B.
Alarm
- C.
Water
- D.
Level
Correct Answer
C. 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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- 3.
In accordance with the statutes of the State of Minnesota, one Boiler horsepower for a conventional boiler is equal to______.
- A.
10 cu of natural gas consumed
- B.
10 sq ft of boiler heating surface
- C.
25 sq ft of boiler tubing
- D.
1000 Btu per hour
Correct Answer
B. 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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- 4.
In accordance with the statutes of the State of Minnesota, one boiler horsepower for steam-coil-type generators is equal to ______.
- A.
100 cu ft of natural gas consumed
- B.
5 sq ft of boiler heating surface
- C.
10 sq ft of boiler heating surface
- D.
100 sq ft of boiler heating surface
Correct Answer
B. 5 sq ft of boiler heating surfaceExplanation
According to the statutes of the State of Minnesota, one boiler horsepower for steam-coil-type generators is equal to 5 sq ft of boiler heating surface.Rate this question:
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- 5.
When the boiler heating surface cannot be discerned, the boiler horsepower shall be determined by dividing the Btu input by__________.
- A.
42,500
- B.
67,000
- C.
75,000
- D.
150,000
Correct Answer
B. 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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- 6.
In accordance with the statutes of the State of Minnesota, each electric boiler horsepower is equal to________Kilowatts.
- A.
10
- B.
32.5
- C.
100
- D.
760
Correct Answer
A. 10Explanation
According to the statutes of the State of Minnesota, each electric boiler horsepower is equal to 10 Kilowatts.Rate this question:
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- 7.
A logbook must be maintained in the boiler room by the_______.
- A.
Chief engineer or operating engineer designee
- B.
Owner
- C.
Plant Manager
- D.
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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- 8.
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.
- A.
500 ft
- B.
100 ft
- C.
1500 ft
- D.
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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- 9.
A high-pressure boiler must have two means of feed water supply if it exceeds _______ HP.
- A.
50
- B.
100
- C.
175
- D.
500
Correct Answer
A. 50Explanation
A high pressure boiler must have two means of feed water supply if it exceeds 50 HP or 500 square feet. This means that if the boiler has a horsepower rating greater than 500, it is required to have two separate methods for supplying water. This is likely to ensure that there is a backup system in place in case one supply method fails, ensuring continuous operation and safety of the boiler.Rate this question:
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- 10.
When used, a quick-opening blowdown valve should be located_______.
- A.
Nearest to the boiler
- B.
On top of safety valve
- C.
Nearest of the exit
- D.
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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- 11.
The minimum passing score for a Minnesota engineer's license examination is______%.
- A.
50
- B.
60
- C.
70
- D.
80
Correct Answer
C. 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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- 12.
Licenses granted must be displayed in _____________.
- A.
The Parking lot close to the exit
- B.
A conspicuous place in the engine or boiler room
- C.
The chief Engineer's Office
- D.
The plant Manager's Office
Correct Answer
B. 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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- 13.
For the purpose of the boiler and pressure vessel statutes, "a year" is considered to be a least_______hr.
- A.
1200
- B.
1845
- C.
1960
- D.
2000
Correct Answer
D. 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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- 14.
Sensible heat is_________.
- A.
The sum of latent heat plus the heat of evaporation
- B.
Not a form of energy
- C.
Able to cause a change in temperature
- D.
The heat of fusion
Correct Answer
C. Able to cause a change in temperatureExplanation
Sensible heat refers to the heat energy that is transferred to or from a substance, resulting in a change in its temperature. It is the heat energy that can be sensed or felt. Unlike latent heat, which is associated with phase changes (such as the heat of evaporation or fusion), sensible heat directly affects the temperature of a substance. Therefore, it is able to cause a change in temperature.Rate this question:
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- 15.
Heat that brings about a change of state without causing a change in temperature is_______.
- A.
Measured by the thermometer
- B.
The sum of sensible heat latent heat
- C.
Called latent heat
- D.
Called sensible heat
Correct Answer
C. Called latent heatExplanation
Latent heat refers to the heat energy absorbed or released during a phase change, such as the conversion of a substance from a solid to a liquid or from a liquid to a gas, without any change in temperature. It is called latent heat because it is hidden or "latent" within the substance and does not directly affect the temperature. This heat is responsible for the changes in state, such as melting or evaporation, and is measured separately from sensible heat, which is the heat that causes a change in temperature.Rate this question:
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- 16.
In a boiler, heat is transferred from the burning fuel to the water by________.
- A.
Convection, expansion, radiation
- B.
Contraction, conduction, expansion
- C.
Convection, conduction, radiation
- D.
Radiation, contraction, conduction
Correct Answer
C. 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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- 17.
Convection is a method of heat transfer where the movement of fluids is due solely to the_______.
- A.
Surface pressure
- B.
Flow of fluids
- C.
Difference in heating time
- D.
Gravitational differences
Correct Answer
B. Flow of fluidsExplanation
Convection is a method of heat transfer where the movement of fluids is due solely to the flow of fluids. In convection, heat is transferred through the bulk movement of the fluid itself, as opposed to conduction where heat is transferred through direct contact between particles. This flow of fluids occurs because of the differences in temperature and density within the fluid, causing the warmer, less dense fluid to rise and the cooler, denser fluid to sink. This continuous circulation of fluid allows for the transfer of heat from one location to another.Rate this question:
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- 18.
Large high-pressure utility boiler use_______
- A.
Natural Draft
- B.
Balance Draft
- C.
Induced draft
- D.
Forced Draft
Correct Answer
A. Natural DraftExplanation
Large high-pressure utility boilers use natural draft for several reasons. Natural draft relies on the buoyancy of hot gasses to create a pressure difference, which allows for the removal of combustion products and the supply of fresh air. This method is cost-effective, as it does not require additional mechanical equipment. Additionally, the natural draft provides a stable and reliable flow of air, ensuring efficient combustion and heat transfer.Rate this question:
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- 19.
When heat transfer occurs by traveling through metal, it is known as _________.
- A.
Radiation
- B.
Conduction
- C.
Convection
- D.
Diffusion
Correct Answer
B. ConductionExplanation
Heat transfer through a metal occurs via conduction. Conduction is the process where heat is transferred through a material without the movement of the material itself. In metals, conduction is particularly efficient because of the free electrons that rapidly transfer energy from one part of the metal to another. Radiation involves heat transfer through electromagnetic waves, convection involves heat transfer through fluid motion, and diffusion is more related to the spreading of particles rather than heat transfer.Rate this question:
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- 20.
An example of the transfer of heat by radiation is_______.
- A.
The heating effect of the sun on the earth
- B.
Using an electric heater with a fan
- C.
The handle of frying pan becoming hot on a stove
- D.
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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- 21.
The document governing boiler fitting and valves is the____code.
- A.
ASME
- B.
National Boiler
- C.
Pressure Valve
- D.
ASHRAE
Correct Answer
A. ASMEExplanation
The correct answer is ASME. ASME stands for the American Society of Mechanical Engineers, which is responsible for developing and maintaining standards and codes for various mechanical engineering practices. ASME Boiler and Pressure Vessel Code specifically governs the design, fabrication, and inspection of boilers, pressure vessels, and related equipment. Therefore, ASME is the appropriate code for governing boiler fitting and valves.Rate this question:
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- 22.
The best method of testing a low-water fuel cutoff (LWCO) is to______.
- A.
Blow the low-water fuel cutoff down through the water column until the burner shuts off.
- B.
Lower the water level in the boiler to the level where the burner should cut out
- C.
Manually trip the cutoff linkage to shut off the burner
- D.
Blow down the float chamber to determine in the burner will cut out
Correct Answer
C. Manually trip the cutoff linkage to shut off the burnerExplanation
Manually tripping the LWCO linkage simulates a low-water condition without actually lowering the boiler water level. This is the safest method because it avoids the risk of damaging the boiler or causing a hazardous situation if the LWCO fails to operate. The other options involve potentially dangerous actions like lowering the water level or blowing down the float chamber, which could lead to overheating or other issues if not performed carefully.Rate this question:
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- 23.
Rules governing the construction of power boilers are set out in_____.
- A.
ASME Code Section I
- B.
ASME Code Section II
- C.
ASME Code Section Viii, Division 1
- D.
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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- 24.
A way to determine if the safety valve on a boiler has sufficient capacity is to_______.
- A.
Check the valve label
- B.
Check the boiler Inspector
- C.
Lift the test lever
- D.
Check with the ASME Code
Correct Answer
D. Check with the ASME CodeExplanation
To determine if a safety valve on a boiler has sufficient capacity, one should check with the ASME Code. The ASME Code sets the standards and regulations for the design, construction, and operation of boilers and pressure vessels. It provides guidelines for the sizing and selection of safety valves based on factors such as the boiler's capacity, pressure, and type. By checking with the ASME Code, one can ensure that the safety valve meets the required capacity to effectively protect the boiler from overpressure situations.Rate this question:
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- 25.
A hydrostatic test is considered to be a____ test that is used to determine if the component works as designed.
- A.
Tensile
- B.
Bend
- C.
Proof
- D.
Destructive
Correct Answer
C. ProofExplanation
A hydrostatic test is considered to be a proof test that is used to determine if the component works as designed. This test involves filling the component with a liquid, usually water, and applying pressure to check for any leaks or failures. It is called a proof test because it provides evidence or proof that the component can withstand the intended operating conditions without any issues.Rate this question:
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- 26.
The material used most frequently for piping in industrial applications is:
- A.
Non-ferrous metals (like copper or aluminum)
- B.
Cast iron
- C.
Stainless steel
- D.
Low carbon steel
Correct Answer
D. Low carbon steelExplanation
Low carbon steel is the most common material used for piping systems, especially in industrial settings. It's cost-effective, strong, and readily available. While non-ferrous metals, cast iron, and stainless steel are also used for specific applications, they are not as widely used as low carbon steel due to factors such as cost, corrosion resistance, and temperature limitations.Rate this question:
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- 27.
In a natural draft furnace, the amount of draft is affected by the____.
- A.
Height of the stack
- B.
Size of the induced draft fan
- C.
Size of the forced draft fan
- D.
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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- 28.
A check valve is a valve that_____.
- A.
Shuts off flow after a predetermined time
- B.
Allows flow in two directions
- C.
Allows flow a regular intervals
- D.
Allows flow in one direction only
Correct Answer
D. 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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- 29.
Expansion bends or joins are installed in piping systems to____.
- A.
Allow for correct piping drainage
- B.
Allow for pressure increases
- C.
Allow for expansion and contraction of piping without causing damage
- D.
Protect against water hammer damage
Correct Answer
C. 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.
The main purpose of installing insulation on steam system piping is to_____.
- A.
Prevent heat loss
- B.
Give the pipe a neat appearance
- C.
Prevent injury to personnel due to contact with the hot surfaces of the pipe
- D.
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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- 31.
The purpose of a steam trap is to_____.
- A.
Allow air to accumulate in the steam line
- B.
Prevent steam from flowing in the steam line
- C.
Remove air and condensate from steam line
- D.
Allow water in the steam lines to accumulate
Correct Answer
C. Remove air and condensate from steam lineExplanation
A steam trap is a device used in steam systems to remove air and condensate from the steam line. As steam condenses into water, it can cause damage to the system and reduce its efficiency. The steam trap helps to remove this condensate and any air present in the line, ensuring that only steam flows through the system. This helps to maintain the proper functioning of the steam system and prevent any potential damage or inefficiencies.Rate this question:
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- 32.
Boiler Stays_____.
- A.
Are used to support tube sheets in a boiler
- B.
Are used in the watertube boilers only
- C.
Have to be replaced every two years
- D.
Are used to anchor the boiler to the floor
Correct Answer
A. Are used to support tube sheets in a boilerExplanation
Boiler stays are used to support tube sheets in a boiler. Tube sheets are important components in a boiler that hold the tubes in place. The stays provide additional support to ensure that the tube sheets remain stable and secure. Without the stays, the tube sheets may become weak and fail, leading to potential safety hazards and operational issues. Therefore, it is essential to use boiler stays to support the tube sheets and maintain the integrity of the boiler system.Rate this question:
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- 33.
Handhole and manhole opening_____.
- A.
Permit inspection, cleaning and repairs
- B.
Require a cast iron reinforcing ring
- C.
Are not require on low pressure hot water boiler
- D.
Are used for draining the boiler
Correct Answer
A. Permit inspection, cleaning and repairsExplanation
Handhole and manhole openings in a boiler permit inspection, cleaning, and repairs. These openings allow access to the interior of the boiler, facilitating necessary maintenance activities such as inspections, cleaning to remove sediment or scale buildup, and repairs to any components or parts as needed to ensure the safe and efficient operation of the boiler.Rate this question:
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- 34.
A low-water fuel cutoff (LWCO) is used on a boiler to prevent_____.
- A.
Damage to the radial stays in the steam dome
- B.
The fire from shutting off too quickly and damaging the boiler
- C.
Shutting off the water when there is no fuel
- D.
Damage due to burner overfiring
Correct Answer
D. Damage due to burner overfiringExplanation
The low-water fuel cutoff (LWCO) is used on a boiler to prevent damage due to burner overfiring. This safety device is designed to shut off the burner when the water level in the boiler drops below a certain point. If the burner continues to fire without sufficient water, it can cause overheating and damage to the boiler. The LWCO helps to protect the boiler from this potential harm by shutting off the burner before it can overfire.Rate this question:
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- 35.
The boiler heating surface_____.
- A.
Is smaller in watertube boiler than in the firetube
- B.
Does not affect the capacity of a boiler
- C.
Can be used to determine the boiler capacity
- D.
Is smaller in firetube boiler than in watertube boiler
Correct Answer
A. Is smaller in watertube boiler than in the firetubeExplanation
The heating surface of a boiler refers to the area of the boiler that is exposed to the heat produced by the combustion of fuel. In general, the heating surface of a watertube boiler is smaller than that of a firetube boiler. This is because, in a water boiler, the water is contained inside the tubes, which are surrounded by hot gasses. This allows for a more efficient transfer of heat from the gasses to the water. In contrast, in a firetube boiler, the water surrounds the tubes, resulting in a larger heating surface area. Therefore, the statement that the heating surface is smaller in a watertube boiler than in a firetube boiler is correct.Rate this question:
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- 36.
With regard to steam boiler, the letters "HRT" mean_____.
- A.
Highly regulated temperature
- B.
Hot return tubes
- C.
Horizontal return tubular
- D.
Highly regulated treatment
Correct Answer
C. Horizontal return tubularExplanation
The letters "HRT" in the context of a steam boiler refer to "Horizontal return tubular." This term describes a specific type of boiler design where the flue gasses travel horizontally through a series of tubes before returning to the front of the boiler. This design allows for efficient heat transfer and is commonly used in small to medium-sized boilers.Rate this question:
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- 37.
When hot combustion gasses travel through boiler tubes that are surrounded by boiler water, the boiler is called a _____ Boiler.
- A.
Watertube
- B.
Cast Iron
- C.
High-return temperature
- D.
Firetube
Correct Answer
D. FiretubeExplanation
A firetube boiler is a type of boiler where hot combustion gasses pass through tubes that are surrounded by boiler water. In this design, the heat from the gasses is transferred to the water, resulting in the production of steam. This type of boiler is commonly used in industrial applications where high steam production is required. The other options mentioned, such as water tube and cast iron boilers, have different designs and mechanisms for heat transfer. The term "high-return temperature" does not accurately describe the type of boiler.Rate this question:
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- 38.
The two general designs of electric boilers are the_____types.
- A.
Firetube and Watertube
- B.
AC and DC
- C.
Electrode and Resistance
- D.
Grounded and Ungrounded
Correct Answer
C. Electrode and ResistanceExplanation
The correct answer is Electrode and Resistance. Electric boilers can be classified into two general designs based on their heating element: electrode and resistance. In electrode boilers, the water is heated by passing an electric current through electrodes immersed in the water. Resistance boilers, on the other hand, use electrical resistance to generate heat, typically through heating elements made of materials with high electrical resistance. These two designs offer different advantages and are suitable for different applications.Rate this question:
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- 39.
Continuous blowdown systems are used in boiler_____.
- A.
For hot water heating systems
- B.
To help control the water level in the steam drum
- C.
To help control the dissolved solids concentration
- D.
To help in the reduction of gas impurities
Correct Answer
C. To help control the dissolved solids concentrationExplanation
Continuous blowdown systems are used in boilers to help control the concentration of dissolved solids. Dissolved solids in boiler water can lead to various problems such as scaling, corrosion, and foaming. By continuously removing a small amount of water from the boiler, the concentration of dissolved solids is reduced, ensuring that the water remains within acceptable limits. This helps to maintain the efficiency and longevity of the boiler system.Rate this question:
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- 40.
A water tube boiler is a boiler that has_____.
- A.
Water on the outside of the tubes and hot gas on the inside of the tubes
- B.
Water on inside of the tubes and hot gas on the outside of the tubes
- C.
Cold water on the outside the tubes and hot water on the inside of the tubes
- D.
Cold air on the outside of the tubes and hot gasses on the inside of the tubes
Correct Answer
B. Water on inside of the tubes and hot gas on the outside of the tubesExplanation
A water tube boiler is a type of boiler that has water flowing inside the tubes while hot gasses or flames surround the outside of the tubes. This design allows for efficient heat transfer and steam generation.Rate this question:
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- 41.
The low-water cutoff (LWCO) is a device fitted to the boiler to shut off the_____.
- A.
Feed water supply is the fuel supply is too low
- B.
Feed water supply is the boiler pressure becomes too high
- C.
Fuel supply to the burners when water level in the boiler is low
- D.
Fuel supply when water temperature is below normal
Correct Answer
C. Fuel supply to the burners when water level in the boiler is lowExplanation
The low-water cutoff (LWCO) is a device fitted to the boiler to shut off the fuel supply to the burners when the water level in the boiler is low. This is important because if the water level in the boiler drops too low, it can expose the heating surfaces to excessive heat, leading to potential damage or even a boiler explosion. By shutting off the fuel supply, the LWCO helps prevent this dangerous situation and ensures the boiler operates safely.Rate this question:
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- 42.
The purpose of the spring in the safety valve is_____.
- A.
Help lift the testing lever
- B.
Help open the valve at blowing pressure
- C.
Close the valve disc against the seat
- D.
Force the valve to open at the correct pressure
Correct Answer
C. Close the valve disc against the seatExplanation
The spring in a safety valve is crucial for maintaining the valve's proper functioning. Its main purpose is to keep the valve closed under normal operating pressures. When the pressure exceeds the set limit, the spring force is overcome, causing the valve to open and release the excess pressure. Once the pressure drops back to safe levels, the spring forces the valve disc to close against the seat, ensuring the system is sealed again.Rate this question:
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- 43.
The safety valve test must not be used unless_____.
- A.
Another licensed engineer is present
- B.
The boiler inspector requests it
- C.
There is no load on the boiler
- D.
The pressure is at about 75% of valve popping pressure
Correct Answer
A. Another licensed engineer is presentExplanation
The safety valve test should not be performed unless another licensed engineer is present. This is important because safety valve testing involves releasing high pressure steam, which can be dangerous if not handled properly. Having another licensed engineer present ensures that there is an experienced professional who can assist and supervise the test, minimizing the risk of accidents and ensuring the safety of everyone involved.Rate this question:
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- 44.
A siphon tube is necessary to_____.
- A.
Prevent steam from reaching the safety valve disc
- B.
Prevent water from entering a steam gauge
- C.
Drain water from a bourdon tube
- D.
Keep steam out of a bourdon tube
Correct Answer
B. Prevent water from entering a steam gaugeExplanation
A siphon tube is necessary to prevent water from entering a steam gauge. This is because steam gauges are designed to measure the pressure of steam, and if water were to enter the gauge, it could cause damage or inaccurate readings. The siphon tube helps to create a barrier between the steam and the gauge, allowing only steam to pass through and preventing any water from entering.Rate this question:
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- 45.
A test connection between the siphon tube and the boiler pressure gauge is needed to _____.
- A.
Unplug the siphon tube when the boiler is in operation
- B.
A test sample of steam for carryover and purity
- C.
Be able to clean the siphon
- D.
Test steam temperature at the pressure shown on the gauge
Correct Answer
D. Test steam temperature at the pressure shown on the gaugeExplanation
The test connection between the siphon tube and the boiler pressure gauge is needed to test the steam temperature at the pressure shown on the gauge. This connection allows for accurate measurement of the steam temperature and ensures that it is consistent with the pressure indicated on the gauge. This is important for monitoring and maintaining the proper functioning of the boiler system.Rate this question:
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- 46.
Try cocks on a water column are used to_____.
- A.
Check the temperature of the water in the column
- B.
Blow down the water column
- C.
Check the water level in the boiler
- D.
Blow down impurities from the column
Correct Answer
C. Check the water level in the boilerExplanation
Try cocks are manually operated valves installed on water columns and are used to verify the water level in a boiler. By opening these valves, an operator can determine whether the level in the column is water, steam, or a mixture, thus ensuring accurate water level monitoring within the boiler.Rate this question:
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- 47.
A_____blowdown is performed to remove sludge from a boiler.
- A.
Surface
- B.
Water column
- C.
Bottom
- D.
Low water fuel cut off
Correct Answer
C. 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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- 48.
Boiler baffles are used_____.
- A.
To direct the flue gasses through the boiler furnace
- B.
To increase the stack temperature
- C.
In every boiler furnace
- D.
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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- 49.
The float chamber of the low water fuel cutoff (LWCO) is frequently blown down to prevent the_____.
- A.
Float chamber from collecting sediment
- B.
Electrical wiring from deteriorating
- C.
Mercury switch from oxidizing
- D.
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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- 50.
The feedwater line contains _____.
- A.
Check valve between a stop valve the rest of feedwater line
- B.
Check valve between a stop valve and a boiler
- C.
Stop valve only
- D.
Two stop valves
Correct Answer
B. Check valve between a stop valve and a boilerExplanation
The correct answer is "check valve between a stop valve and a boiler". This means that the feedwater line contains a check valve, which is a type of valve that allows the flow of fluid in one direction only. It is located between a stop valve and a boiler, which ensures that water flows from the feedwater line into the boiler and prevents any backflow.Rate this question:
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Quiz Review Timeline +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
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Current Version
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Oct 15, 2024Quiz Edited by
ProProfs Editorial Team
Expert Reviewed by
Zohra Sattar Waxali -
Sep 25, 2020Quiz Created by
Hermy Hernand
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