Master Plumber Practice Exam (Sanitation, Design & Installation)

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  • 1/100 Questions

    PE plastic tubing is a material used for water service connection. What is the meaning of PE?

    • Plastic Expander
    • Poly Enzyme
    • Plastic Extrusion
    • Polyethylene
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About This Quiz

Master Plumbers are bound by a code of ethics, insured for six years, licensed and registered, highly trained, quality tradesman and backed by the industry. The highest level is the master plumber, which requires experience as a journeyman plumber. The quiz below covers sanitation, Design & Installation for that plumber exam. Give it a try.

Master Plumber Practice Exam (Sanitation, Design & Installation) - Quiz

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  • 2. 

    What is meant by PE plastic tube , material used for service connection?

    • Plastic extruscion

    • Polyethelene

    • Polyenzyme

    • Plastic expander

    Correct Answer
    A. Polyethelene
    Explanation
    Polyethylene (PE) is a type of plastic material commonly used for making plastic tubes. PE plastic tubes are often used for service connections, such as plumbing or electrical connections. Polyethylene is a versatile material that is durable, lightweight, and resistant to chemicals and moisture. It is a popular choice for various applications due to its low cost and easy availability. Therefore, when referring to a PE plastic tube as a material used for service connections, it means that the tube is made of polyethylene.

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  • 3. 

    What is the common pipe material use for in house water system?

    • BI pipe

    • CI pipe

    • GI pipe

    • AC Pipe

    Correct Answer
    A. GI pipe
    Explanation
    GI pipe, or Galvanized Iron pipe, is commonly used for in-house water systems. This type of pipe is made of iron or steel and is coated with a layer of zinc to prevent corrosion. The zinc coating helps to protect the pipe from rust and extends its lifespan. GI pipes are durable, strong, and resistant to various weather conditions, making them suitable for carrying water in residential buildings.

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  • 4. 

    Disinfection of drinking water is done to remove

    • Bacteria

    • Color

    • Odor

    • Turbidity

    Correct Answer
    A. Bacteria
    Explanation
    Drinking water is disinfected to remove bacteria, as they can cause various waterborne diseases. Disinfection processes like chlorination or ultraviolet (UV) radiation are commonly used to kill or inactivate bacteria present in the water. Removing bacteria ensures that the water is safe for consumption and reduces the risk of illnesses caused by bacterial contamination. The other options mentioned, such as color, odor, and turbidity, may also be addressed during the water treatment process but are not the primary reason for disinfection.

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  • 5. 

    What is the common pipe material use for in house water system?

    • BI pipe

    • CI pipe

    • GI pipe

    • AC Pipe

    Correct Answer
    A. GI pipe
    Explanation
    GI pipe, which stands for Galvanized Iron pipe, is commonly used in house water systems. This type of pipe is made of iron or steel and is coated with a layer of zinc to prevent corrosion. The zinc coating also helps to extend the lifespan of the pipe and maintain water quality. GI pipes are known for their durability, strength, and resistance to rust, making them a suitable choice for transporting water in residential buildings.

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  • 6. 

    What system uses an assembly of mechanical device which raise water using compressed air as delivery method.

    • (pneumatic) air pressure system

    • Downfeed system

    • Overhead feed system

    • Deepwell system

    Correct Answer
    A. (pneumatic) air pressure system
    Explanation
    A pneumatic air pressure system uses an assembly of mechanical devices to raise water using compressed air as the delivery method. Compressed air is used to create pressure, which pushes the water through the system, allowing it to be raised to a desired height. This system is commonly used in various applications where a reliable and efficient method of water transportation is required.

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  • 7. 

    What is joining compound is used to assemble poly vinyl chloride pipe and fitting together

    • Epoxy

    • Solvent cement

    • Rugby

    • Glue

    Correct Answer
    A. Solvent cement
    Explanation
    Solvent cement is the joining compound used to assemble poly vinyl chloride (PVC) pipe and fittings together. PVC pipes and fittings are commonly used in plumbing and construction projects. Solvent cement is a strong adhesive that works by chemically bonding the PVC materials together. It is applied to the surfaces of the pipe and fittings, and when it dries, it creates a secure and watertight connection. Epoxy, rugby, and glue are not typically used for joining PVC pipes and fittings.

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  • 8. 

    Pour index horsepower is how many foot lbs per minutes

    • 30,000

    • 33,000

    • 33,333

    • 32,564

    Correct Answer
    A. 33,000
    Explanation
    Pour index horsepower is a unit used to measure the power output of an engine. It represents the amount of work done per minute, measured in foot-pounds. The correct answer is 33,000 because it is the closest value to the standard conversion factor of 1 horsepower being equal to 33,000 foot-pounds per minute.

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  • 9. 

    The soil branch must be slope at a grade so that waste content is given a flow of pipe velocity to assure a self-scouring condition 

    • 1 %

    • 2%

    • 3%

    • 4%

    Correct Answer
    A. 2%
    Explanation
    A slope of 2% is necessary in the soil branch to ensure that waste content flows through the pipe at a sufficient velocity. This velocity is required to maintain a self-scouring condition, meaning that the waste content is carried away effectively without causing blockages or buildup in the pipe. A slope of 2% provides the right amount of gradient for the waste to flow smoothly and prevent any potential issues in the system.

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  • 10. 

    A pump used in uderground

    • Surface pump

    • Submersible pump

    • Piston pump

    • Centrifugal pump

    Correct Answer
    A. Submersible pump
    Explanation
    A submersible pump is the correct answer because it is specifically designed to be used underground. Unlike surface pumps, which are located above ground and draw water up through a hose or pipe, submersible pumps are submerged in the water source and push water up to the surface. This makes them ideal for applications such as wells, boreholes, and other underground water sources. Piston pumps and centrifugal pumps are not typically used underground, and while they can be used in certain applications, they are not specifically designed for underground use like submersible pumps are.

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  • 11. 

    What is the type of water closet prescribed for public toilet?

    • Elongated bowl type

    • Oval Bowl type

    • Round type

    • Egg shaped type

    Correct Answer
    A. Elongated bowl type
    Explanation
    The type of water closet prescribed for public toilets is the elongated bowl type. This type of water closet is designed with an elongated shape, providing more comfort and ease of use for users. It is commonly used in public toilets due to its ergonomic design and ability to accommodate a wide range of body types. The elongated bowl type also offers better hygiene and sanitation compared to other types of water closets, making it the preferred choice for public facilities.

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  • 12. 

    What is the distance between the faucet outlet and the flood rim of the basin into which it discharges?

    • Air chamber

    • Air gap

    • Air valve

    • Air bubble

    Correct Answer
    A. Air gap
    Explanation
    The distance between the faucet outlet and the flood rim of the basin is referred to as the air gap. This is a necessary feature to prevent backflow contamination, as it creates a physical barrier between the water supply and the basin. The air gap ensures that in the event of a drop in water pressure, contaminated water cannot flow back into the clean water supply.

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  • 13. 

    Which of these stages is not one among cycle of water?

    • Saturation

    • Precipitation

    • Evaporation

    • Condensation

    Correct Answer
    A. Saturation
    Explanation
    Saturation is not one of the stages in the cycle of water. The water cycle consists of four main stages: evaporation, condensation, precipitation, and collection. During evaporation, water changes from a liquid state to a gaseous state. Condensation occurs when the water vapor in the air cools and turns back into liquid water. Precipitation refers to the process where water droplets in the atmosphere come together to form larger droplets and fall to the ground as rain, snow, sleet, or hail. Finally, collection involves the gathering of water in bodies such as rivers, lakes, and oceans. Saturation, on the other hand, refers to the point at which a substance can no longer dissolve in a solvent and is not directly part of the water cycle.

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  • 14. 

    What is the meaning of "u" placed before PVC pipe, a material used for water system.

    • Under

    • Universal

    • Unplasticized

    • Ultra

    Correct Answer
    A. Unplasticized
    Explanation
    The meaning of "u" placed before PVC pipe, a material used for water systems, is "unplasticized". This indicates that the PVC pipe is not made with any plasticizers, which are substances added to plastics to increase their flexibility. Unplasticized PVC pipes are rigid and do not bend easily, making them suitable for applications where strength and durability are important, such as water systems.

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  • 15. 

    Pour index horsepower is how many foot lbs per minutes

    • 30,000

    • 33,000

    • 33,333

    • 32,564

    Correct Answer
    A. 33,000
    Explanation
    The correct answer is 33,000. Pour index horsepower refers to the power output of an engine or motor. It is a unit that measures the rate at which work is done. In this case, it is measured in foot-pounds per minute. The answer 33,000 indicates that the engine or motor is capable of producing 33,000 foot-pounds of work per minute.

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  • 16. 

    Where is surface water for domestic use collected?

    • Seas

    • Streams

    • Mountains

    • Oceans

    Correct Answer
    A. Streams
    Explanation
    Surface water for domestic use is collected from streams. Streams are bodies of water that flow continuously in a channel, such as rivers or creeks. These water sources are often accessible and provide a reliable supply of fresh water for various domestic purposes, including drinking, cooking, and cleaning. Unlike seas, oceans, or mountains, streams are more easily accessible and provide a more suitable source of surface water for domestic use.

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  • 17. 

    An automatic safety device of a hot water supply system is always provided in order to eliminate

    • Human error

    • Bursting

    • Underheating

    • Overheating

    Correct Answer
    A. Overheating
    Explanation
    An automatic safety device is always provided in a hot water supply system to eliminate the risk of overheating. This device is designed to monitor the temperature of the water and automatically shut off the heating system if it exceeds a certain safe limit. By doing so, it prevents the water from reaching dangerously high temperatures that could lead to scalding or damage to the system. This safety measure ensures that the hot water supply system operates within a safe temperature range, protecting both users and the equipment.

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  • 18. 

    What is that fittings so installed in a plumbing system to prevent the passage of air, gas and some vermin through the pipe?

    • Trap

    • Check Valve

    • Flap Valve

    • Gate valve

    Correct Answer
    A. Trap
    Explanation
    A trap is a fitting that is installed in a plumbing system to prevent the passage of air, gas, and some vermin through the pipe. It is designed in a way that it retains a small amount of water in its bend, creating a water seal. This water seal acts as a barrier, preventing the backflow of gases or vermin from the sewer into the building. Therefore, a trap is the correct answer to the question.

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  • 19. 

    That pipe which conveys waste water and water carried waste without fecal matter

    • Waste Pipe

    • Wet stand pipe

    • Vent Pipe

    • Wet Vent

    Correct Answer
    A. Waste Pipe
    Explanation
    A waste pipe is a pipe that is specifically designed to carry waste water and water carried waste without fecal matter. It is used to transport liquid waste from fixtures such as sinks, showers, and washing machines to the main sewer line or septic system. Unlike other types of pipes listed, the waste pipe is specifically designed for this purpose and does not handle fecal matter.

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  • 20. 

    What is required when cast iron pipe and fittings of different size are to be joined or connected?

    • Gasket

    • Nipple

    • An increaser or reducer

    • Union patente

    Correct Answer
    A. An increaser or reducer
    Explanation
    When cast iron pipe and fittings of different sizes need to be joined or connected, an increaser or reducer is required. This is because an increaser allows for the transition from a smaller pipe size to a larger one, while a reducer allows for the transition from a larger pipe size to a smaller one. These fittings ensure a proper and secure connection between the pipes of different sizes.

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  • 21. 

    Sink used as a rule for janitorial services in a building is called

    • Pantry sink

    • Scullery sink

    • Wash-up sink

    • Slop sink

    Correct Answer
    A. Slop sink
    Explanation
    A slop sink is a sink typically used in janitorial services in a building. It is specifically designed for disposing of dirty water and other waste materials, making it ideal for cleaning tasks. The term "slop" refers to the act of throwing away or disposing of liquid waste, which aligns with the purpose of this type of sink. Therefore, a sink used as a rule for janitorial services in a building is called a slop sink.

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  • 22. 

    Bacteria which has no function in sewage treatment

    • Non-aerobic bacteria

    • Pathogenic bacteria

    • Facultative bacteria

    • Aerobic bacteria

    Correct Answer
    A. Pathogenic bacteria
    Explanation
    Pathogenic bacteria are disease-causing bacteria that can be harmful to humans and other organisms. While sewage treatment typically involves the use of bacteria to break down organic matter, pathogenic bacteria have no function in this process and can even pose a risk to public health if present in sewage. Therefore, pathogenic bacteria are the correct answer as they do not play a role in sewage treatment.

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  • 23. 

    The non-soluble materials which is the end product after biological action of bacteria in waste and what settles at the bottom of the septic tank is called

    • Scum

    • Sledge

    • Sludge

    • Smudge

    Correct Answer
    A. Sludge
    Explanation
    The correct answer is "sludge". Sludge refers to the non-soluble materials that settle at the bottom of a septic tank after the biological action of bacteria on waste. It is the solid residue that accumulates over time and needs to be periodically removed from the tank to maintain its efficiency.

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  • 24. 

     A seepage is defined as a sewage terminal

    • Receiving both liquid and solid waste

    • Receiving only liquid waste

    • Receiving only solid waste

    • Receiving direct human excrement

    Correct Answer
    A. Receiving only liquid waste
    Explanation
    The correct answer is "receiving only liquid waste." A seepage refers to a sewage terminal that receives only liquid waste. This means that it does not handle solid waste or direct human excrement.

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  • 25. 

    How does the safely feature of a service hot water system work?

    • Mechanically

    • Automatically

    • Manually

    • Electrically

    Correct Answer
    A. Automatically
    Explanation
    The safely feature of a service hot water system works automatically. This means that it operates without the need for human intervention or manual control. The system is designed to detect any potential risks or malfunctions and take appropriate actions to ensure safety. It can automatically shut off the water supply, adjust temperature settings, or activate safety mechanisms in case of emergencies or abnormal conditions. This automatic functionality adds convenience and peace of mind for users, as they can rely on the system to operate safely without constant monitoring or intervention.

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  • 26. 

    What is the vertical distance between the dip and crown weir of the trap? 

    • Trap seal

    • Crown air

    • Leader

    • Bleeder

    Correct Answer
    A. Trap seal
    Explanation
    The vertical distance between the dip and crown weir of the trap is known as the trap seal. The trap seal is the water-filled barrier in a plumbing trap that prevents sewer gases from entering the building. It is essential for maintaining proper sanitation and preventing foul odors.

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  • 27. 

    In plumbing, the unobstructed vertical distance through the free atmosphere, between faucet supplying water and the flood level rim of a fixture is called 

    • Air gap

    • Air break

    • Trap seal

    • Free height

    Correct Answer
    A. Air gap
    Explanation
    An air gap is the unobstructed vertical distance between a faucet supplying water and the flood level rim of a fixture in plumbing. It is an important safety feature as it prevents backflow of contaminated water into the water supply system.

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  • 28. 

    What water is a portion of rainwater which percolate into the earth to form underground deposit?

    • Dew

    • Surface

    • Spring surface

    • Ground water

    Correct Answer
    A. Ground water
    Explanation
    Ground water refers to the portion of rainwater that percolates into the earth and forms underground deposits. It is the water that is stored in the spaces between rocks and soil underground. This water can be accessed through wells and springs, and it is an important source of drinking water and irrigation for many communities. Ground water is replenished through the process of precipitation and can take years or even centuries to fully recharge.

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  • 29. 

     A seepage is defined as a sewage terminal

    • Receiving both liquid and solid waste

    • Receiving only liquid waste

    • Receiving only solid waste

    • Receiving direct human excrement

    Correct Answer
    A. Receiving only liquid waste
    Explanation
    The correct answer is "receiving only liquid waste." This is because the definition of seepage states that it is a sewage terminal that receives only liquid waste. It does not include solid waste or direct human excrement.

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  • 30. 

    What is the process of exposing water in their films to the oxygen of the atmosphere in order to remove neutralize the taste, odor and dissolved oxygen?

    • Filtration

    • Screening

    • Aeration

    • Sedimentation

    Correct Answer
    A. Aeration
    Explanation
    Aeration is the process of exposing water in films to the oxygen of the atmosphere in order to remove, neutralize the taste, odor, and dissolved oxygen. This process helps in improving the quality of water by allowing the dissolved gases to escape and reducing any unpleasant taste or odor. Filtration is the process of removing impurities from water, screening is the process of removing large particles, and sedimentation is the process of allowing solid particles to settle at the bottom.

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  • 31. 

    What is that vent pipe system on plumbing which liquid waste flow through?

    • Wet vent

    • Yoke vent

    • Stack Vent

    • Back Vent

    Correct Answer
    A. Wet vent
    Explanation
    A wet vent is a type of vent pipe system in plumbing where both wastewater and air are carried through the same pipe. It allows for the efficient flow of liquid waste by using the momentum of the flowing water to draw air from the vent. This helps to prevent the buildup of pressure and the formation of airlocks in the plumbing system. Wet vents are commonly used in multi-story buildings or complex plumbing systems where multiple fixtures are connected to a single vent pipe.

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  • 32. 

    How far should be the distance of a septic tank from a well to prevent contamination of water?

    • 20 m

    • 50 m

    • 15 m

    • 40 m

    Correct Answer
    A. 15 m
    Explanation
    The distance of a septic tank from a well should be at least 15 meters to prevent contamination of water. This is because septic tanks contain wastewater and harmful bacteria that can seep into the ground and contaminate the well water if it is located too close. By maintaining a minimum distance of 15 meters, the risk of contamination is reduced, ensuring the safety of the well water.

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  • 33. 

    Study of the distribution of the disease or condition in a population

    • Public Health

    • Environmental Sanitation

    • Epidemiology

    • Environmental Heath

    Correct Answer
    A. Epidemiology
    Explanation
    Epidemiology is the study of the distribution of diseases or conditions in a population. It involves analyzing patterns, causes, and effects of health-related events in order to prevent and control diseases. This field is crucial in understanding the prevalence and impact of diseases, identifying risk factors, and developing strategies for disease prevention and control. Epidemiologists collect and analyze data to track the spread of diseases, investigate outbreaks, and assess the effectiveness of interventions. By studying the distribution of diseases, epidemiology helps inform public health policies and interventions to improve the overall health of populations.

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  • 34. 

    Bacteria which has no function in sewage treatment

    • Non-aerobic bacteria

    • Pathogenic bacteria

    • Facultative bacteria

    • Aerobic bacteria

    Correct Answer
    A. Pathogenic bacteria
    Explanation
    Pathogenic bacteria refers to bacteria that can cause diseases in humans, animals, and plants. In the context of sewage treatment, pathogenic bacteria are not beneficial as they can contaminate the water and pose a risk to public health. Sewage treatment processes primarily aim to remove harmful bacteria and other contaminants from wastewater to ensure its safe disposal or reuse. Therefore, the presence of pathogenic bacteria in sewage can hinder the effectiveness of sewage treatment and increase the potential for disease transmission.

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  • 35. 

    A well that penetrates the earth to depths of not more than 100 ft

    • Flowing well

    • Shallow well

    • Deep well

    • Artesian well

    Correct Answer
    A. Deep well
    Explanation
    A deep well is the correct answer because it is the only option that aligns with the given description of a well that penetrates the earth to depths of not more than 100 ft. A flowing well refers to a well that has a continuous flow of water, a shallow well is one that is not very deep, and an artesian well is a well that taps into a confined aquifer, none of which fit the given description. Therefore, deep well is the most appropriate option based on the information provided.

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  • 36. 

    What produces when magnesium salt is present in water?

    • Mineral hardness

    • Permanent hardness

    • Total hardness

    • Temporary hardness

    Correct Answer
    A. Mineral hardness
  • 37. 

    What pressure is loss caused by water flowing thru the pipe in a system?

    • Dynamic

    • Friction loss

    • Static water pressure

    • Water pressure

    Correct Answer
    A. Friction loss
    Explanation
    Friction loss refers to the pressure drop that occurs when water flows through a pipe in a system. As water moves through the pipe, it encounters resistance from the inner surface of the pipe, causing a decrease in pressure. This loss of pressure is known as friction loss. It is important to consider friction loss in order to properly design and size pipes for efficient water flow in a system.

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  • 38. 

    One of the first steps in the selection of suitable water supply source is

    • Water demand

    • Budgetary cost

    • Water potability

    • Topography

    Correct Answer
    A. Water potability
    Explanation
    The correct answer is water potability. When selecting a suitable water supply source, it is important to consider the potability of the water. This refers to the quality and safety of the water for human consumption. It is crucial to ensure that the water source meets the necessary standards and regulations to avoid any health risks. Water demand, budgetary cost, and topography are also important factors to consider, but water potability takes precedence as it directly affects the health and well-being of the population.

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  • 39. 

    What is the pipe fitting with outside thread and projecting square head used for closing the edge of another fitting? 

    • Plug

    • Cap

    • Knot

    • Bushing

    Correct Answer
    A. Plug
    Explanation
    A pipe fitting with an outside thread and projecting square head is used for closing the edge of another fitting. This fitting is called a plug. It is designed to fit into the opening of a pipe or fitting to seal it off and prevent the flow of liquid or gas. The outside thread allows it to be securely screwed into the opening, while the square head provides a surface for easy gripping and tightening.

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  • 40. 

    What is that device use to prevent backflow whereby air is admitted to the supply pipe whenever a vacuum occur?

    • Gate valve

    • Air relief valve

    • Float valve

    • Vacuum breaker

    Correct Answer
    A. Vacuum breaker
    Explanation
    A vacuum breaker is a device used to prevent backflow by admitting air into the supply pipe when a vacuum occurs. This helps to equalize the pressure and prevent the reverse flow of water or other fluids. This device is commonly used in plumbing systems to protect against contamination and maintain the integrity of the water supply.

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  • 41. 

    Where is rainwater for domestic use collected?

    • Lakes

    • Grounds

    • Plants

    • Roofs

    Correct Answer
    A. Roofs
    Explanation
    Rainwater for domestic use is collected from roofs. This is because roofs provide a large surface area for rainwater to fall on and collect. The rainwater is then directed into gutters and downspouts, which lead to storage tanks or other collection systems. Collecting rainwater from roofs is a common practice as it allows for the harvesting and utilization of a natural resource, reducing the reliance on other water sources and promoting sustainability.

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  • 42. 

    How do you measure the rainfall intensity?

    • Inches / hr

    • Inches/ min

    • Inches/ sec

    • Inches/ day

    Correct Answer
    A. Inches / hr
    Explanation
    Rainfall intensity is typically measured in inches per hour. This measurement indicates the amount of rainfall that falls within a one-hour time period. It is a standard unit used to quantify the rate at which rain is falling, providing valuable information for various purposes such as flood forecasting, water resource management, and urban planning. Other options such as inches per minute, inches per second, or inches per day are not commonly used for measuring rainfall intensity.

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  • 43. 

    Horizontal drainage lines connecting with horizontal drainage lines shall enter through

    • 90 degree wye branches

    • Combination wye and 1/8 bend

    • wye

    • None of the above

    Correct Answer
    A. Combination wye and 1/8 bend
    Explanation
    The correct answer is "combination wye and 1/8 bend". When horizontal drainage lines connect with other horizontal drainage lines, they should enter through a combination wye and 1/8 bend. This type of fitting allows for smooth flow and proper drainage. The combination of a wye and 1/8 bend ensures that the wastewater can flow freely without any obstructions or backups. Using a 90-degree wye branch or a regular wye may cause blockages and hinder the drainage system's effectiveness.

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  • 44. 

    A urinal stall type should have a minimum water supply size

    • 3/4"

    • 5/8"

    • 1 1/4"

    • 3/8"

    Correct Answer
    A. 3/4"
    Explanation
    The correct answer is 3/4". A urinal stall type should have a minimum water supply size of 3/4". This is because a larger water supply size is required to ensure an adequate flow of water for flushing and maintaining cleanliness in the urinal stall. A smaller water supply size, such as 5/8" or 3/8", may not provide enough water flow and could result in inadequate flushing and potential hygiene issues. A larger water supply size, such as 1 1/4", may be excessive and wasteful in terms of water usage.

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  • 45. 

    How many lavatories shall be installed in an office with 160 female employee.

    • 3

    • 4

    • 2

    • 5

    Correct Answer
    A. 4
    Explanation
    *##*1 lavatory : 40 female employee*##*

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  • 46. 

    What fitting is needed in a cleanout if the pipe is 6" diameter?

    • Nipple

    • Reducer

    • Elbow

    • Long sweep

    Correct Answer
    A. Reducer
    Explanation
    A reducer fitting is needed in a cleanout if the pipe is 6" diameter because a cleanout is typically a larger opening in the pipe that allows for easy access to the inside of the pipe for cleaning or inspection purposes. Since the pipe diameter is 6", a reducer fitting is required to connect the larger cleanout opening to the smaller diameter of the pipe. This ensures a proper and secure fit between the cleanout and the pipe, allowing for effective maintenance and cleaning of the pipe system.

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  • 47. 

    What should be done before working with lead that is wet?

    • Pre-heat

    • Use blower

    • Wipe it

    • Use drier

    Correct Answer
    A. Wipe it
    Explanation
    Before working with wet lead, it is important to wipe it. This is because lead can be toxic, and when it is wet, it can be more easily absorbed into the body through skin contact or inhalation. Wiping the wet lead helps to remove any excess moisture, reducing the risk of exposure to the toxic substance.

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  • 48. 

    Which of these maintenance procedures maybe performed on a pump while it is running?

    • Lubricating the impeller fins

    • Tightening the packing nut

    • Replacing the seal parts

    • Replacing the packing

    Correct Answer
    A. Tightening the packing nut
    Explanation
    Tightening the packing nut can be performed on a pump while it is running because it involves adjusting the packing material around the pump shaft to prevent leakage. This procedure does not require the pump to be shut down or stopped, allowing it to continue operating while the packing is adjusted.

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  • 49. 

    The property of a fluid whereby its own molecule are united or attracted to each other is:

    • Ideal fluid

    • Pilot tube

    • Cohesion

    • Adhesion

    Correct Answer
    A. Cohesion
    Explanation
    Cohesion refers to the property of a fluid where its own molecules are attracted to each other. This attraction is responsible for the fluid's ability to stick together and form droplets or maintain its shape. It is the cohesive forces between the molecules that allow liquids to exhibit surface tension and create capillary action. Cohesion is an important characteristic of fluids and plays a significant role in various natural phenomena, such as water droplets forming on a surface or the movement of sap in plants.

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  • Current Version
  • Jun 28, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Jan 16, 2017
    Quiz Created by
    Grazel Marcos
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