Design, Operation And Maintenance Of Building Systems.
Design, Operation and Maintenance of Building systems.
Questions and Answers
- 1.
The direct expansion refrigerent HVAC system commonly used in newer one to three story office buildings is the:
- A.
Through the wall unit
- B.
Water cooled cabinet unit
- C.
Rooftop unit
- D.
Fan coil unit
Correct Answer
C. Rooftop unitExplanation
The correct answer is rooftop unit. Rooftop units are commonly used in newer one to three story office buildings for direct expansion refrigerant HVAC systems. These units are designed to be installed on the roof of the building and provide both heating and cooling functions. They are compact and self-contained, with all the necessary components including the compressor, condenser, evaporator, and fan, housed in a single unit. This type of system is efficient and space-saving, making it a popular choice for commercial buildings.Rate this question:
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- 2.
As part of an economic feasibility study, which evaluation approach analyzes all current and future financial implications of a capital project?
- A.
Systems approach
- B.
Life cycle costing
- C.
Pay back evaluation
- D.
Cost benefit analyis
Correct Answer
B. Life cycle costingExplanation
Life cycle costing is an evaluation approach that analyzes all current and future financial implications of a capital project. This approach takes into account not only the initial costs of the project but also the costs associated with its operation, maintenance, and disposal over its entire life cycle. By considering these long-term costs, life cycle costing provides a more comprehensive and accurate assessment of the economic feasibility of the project.Rate this question:
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- 3.
The HVAC componet requiring the Most maintenance due to wear, dirt, and vibration and at least ssemiannual inspection for lost accuracy and failure is the:
- A.
Refrigeration compressor
- B.
Pressure gauge
- C.
Automatic tempererature control
- D.
Air handling unit
Correct Answer
C. Automatic tempererature controlExplanation
The automatic temperature control is the HVAC component that requires the most maintenance due to wear, dirt, and vibration. It also needs at least semiannual inspection for lost accuracy and failure. This is because the automatic temperature control is responsible for regulating and maintaining the desired temperature in a space. It constantly adjusts the heating or cooling system based on the temperature readings, and therefore, it is more prone to wear and tear, dirt accumulation, and vibration. Regular inspection is necessary to ensure that it is functioning properly and accurately.Rate this question:
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- 4.
All flooring requires that there be some preperation of the:
- A.
Inside temperture
- B.
Subfloor
- C.
Air quality
- D.
Walls
Correct Answer
B. SubfloorExplanation
The correct answer is subfloor. When installing any type of flooring, it is essential to prepare the subfloor properly. The subfloor is the underlying surface that the flooring will be installed on. It needs to be clean, level, and structurally sound to ensure a successful installation. Preparing the subfloor involves removing any existing flooring, repairing any damage, and ensuring that the surface is smooth and free of debris. This step is crucial as it provides a stable and even base for the new flooring, preventing issues such as unevenness or squeaking.Rate this question:
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- 5.
Which is a dead load?
- A.
Occupants
- B.
Utility istallations
- C.
Movable partitions
- D.
Precipitation
Correct Answer
B. Utility istallationsExplanation
Utility installations are considered dead loads because they are permanent fixtures within a building that do not change or move. Dead loads are the permanent and immovable components of a structure, such as walls, floors, and utility systems. Occupants, movable partitions, and precipitation are not considered dead loads as they are not permanent fixtures and can vary or change over time.Rate this question:
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- 6.
Steel rods or bars are added to concrete to provide additional:
- A.
Compressive strength
- B.
Insulation
- C.
Tensile strength
- D.
Weater resistance
Correct Answer
C. Tensile strengthExplanation
Steel rods or bars are added to concrete to provide additional tensile strength. Concrete is a strong material in compression but weak in tension. By adding steel reinforcement, the concrete becomes better able to resist tensile forces, such as those caused by bending or stretching. The steel rods or bars act as a framework within the concrete, distributing and absorbing the tension forces, thereby improving the overall strength and durability of the concrete structure.Rate this question:
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- 7.
Which type of bond guarantees that the contractor will complete the work in accordance with the oowner-contractor agreement?
- A.
Ancillary bond
- B.
Bid bond
- C.
Payment bond
- D.
Performance bond
Correct Answer
D. Performance bondExplanation
A performance bond is a type of bond that ensures the contractor will fulfill their obligations as stated in the owner-contractor agreement. It guarantees that the contractor will complete the work in accordance with the agreed-upon terms and specifications. This bond provides financial protection to the owner in case the contractor fails to deliver the project as promised. It is commonly used in construction projects to mitigate risks and ensure that the work is completed as agreed upon.Rate this question:
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- 8.
Typical problems with the exterior building envelope are failure or deterioration of all of the following except.
- A.
Weepholes
- B.
Glazing compound
- C.
Mortar joints
- D.
Backer rods
Correct Answer
D. Backer rodsExplanation
The given answer is "backer rods". Backer rods are commonly used in construction to fill gaps and provide support in joints and cracks. They are designed to be flexible and compressible, helping to create a seal and prevent moisture or air infiltration. Therefore, failure or deterioration of backer rods would be considered a typical problem with the exterior building envelope.Rate this question:
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- 9.
Wich is false concerning CPM (critical path method) scheduling?
- A.
CPM is a simple, powerful tool that is commonly used in project scheduling.
- B.
Critical task are those items that can be done at the same time
- C.
When properly used, CPM can give a snapshot of a projects health at any given moment.
- D.
The crital tasks make up a line or path that determines the amount of time the job takes.
Correct Answer
B. Critical task are those items that can be done at the same timeExplanation
The statement that critical tasks are those items that can be done at the same time is false. In CPM scheduling, critical tasks are the ones that must be completed in order to finish the project on time. These tasks are dependent on each other and cannot be done simultaneously. The critical path is the sequence of these tasks that determines the overall duration of the project.Rate this question:
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- 10.
All of the following are advantages of glass-fiber-reinforced gypsum except
- A.
Superior fire-retardant properties.
- B.
Light weight for use on ceilings
- C.
Easy to ship and store.
- D.
Installation
Correct Answer
C. Easy to ship and store.Explanation
Glass-fiber-reinforced gypsum has several advantages, including superior fire-retardant properties, light weight for use on ceilings, and easy installation. However, it is not particularly advantageous in terms of shipping and storage. This may be due to its fragile nature, which could make it more difficult to transport and store compared to other materials.Rate this question:
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- 11.
The principal way to improve a buildings indoor air quality is to:
- A.
Establish a no smoking policy throughout the building
- B.
Educate occupants about the materials used in furniture.
- C.
Reduce the amount of outside air drawn into the building
- D.
Maintain acceptable temperature and relative humidity
Correct Answer
D. Maintain acceptable temperature and relative humidityExplanation
Maintaining acceptable temperature and relative humidity is the principal way to improve a building's indoor air quality. This is because high humidity levels can promote the growth of mold and mildew, which can negatively impact air quality. Additionally, extreme temperatures can lead to discomfort and potential health issues. By ensuring that the temperature and relative humidity are within acceptable ranges, the risk of mold growth and discomfort is minimized, thus improving the overall indoor air quality.Rate this question:
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- 12.
A lower U-Value indicates that a curtain wall or window assembly:
- A.
Is poorly designed
- B.
Can handle most seimic loads
- C.
Is well insulated
- D.
Has excellent expansion capabilities
Correct Answer
C. Is well insulatedExplanation
A lower U-Value indicates that a curtain wall or window assembly is well insulated. The U-Value measures the rate of heat transfer through a material, with a lower value indicating better insulation. Therefore, a lower U-Value means that the curtain wall or window assembly is able to effectively prevent heat from escaping or entering the building, resulting in improved energy efficiency and thermal comfort inside the space.Rate this question:
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- 13.
All of the following are building location factors related to roof design and selection criteria except:
- A.
The presense of rooftop epuipment
- B.
Climate conditions
- C.
Ease of roof access and potential for vandalism
- D.
The presence of birds, vermin, and other potential pest.
Correct Answer
A. The presense of rooftop epuipmentExplanation
The presence of rooftop equipment is not a building location factor related to roof design and selection criteria. Factors such as climate conditions, ease of roof access and potential for vandalism, and the presence of birds, vermin, and other potential pests are all important considerations when designing and selecting a roof. However, the presence of rooftop equipment does not directly impact roof design or selection criteria.Rate this question:
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- 14.
Efforts to keep equipment in good operating condition are called:
- A.
Maintenance
- B.
Troubleshooting
- C.
Monitoring
- D.
Inspection
Correct Answer
A. MaintenanceExplanation
Maintenance refers to the activities and processes undertaken to keep equipment in good operating condition. It involves regular checks, repairs, and servicing to prevent breakdowns and ensure optimal performance. Maintenance includes tasks such as cleaning, lubricating, replacing worn parts, and conducting routine inspections. By proactively maintaining equipment, organizations can minimize downtime, extend the lifespan of assets, and reduce the risk of costly repairs or replacements.Rate this question:
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- 15.
In a refrigeration system, the pressure on the discharge side of the compressor is called:
- A.
High-side pressure
- B.
Back pressure
- C.
Suction pressure
- D.
Low-side pressure
Correct Answer
A. High-side pressureExplanation
In a refrigeration system, the pressure on the discharge side of the compressor is referred to as high-side pressure. This pressure is typically higher than the pressure on the suction side of the compressor. The high-side pressure is important in the refrigeration cycle as it helps to push the refrigerant through the condenser, where it releases heat and condenses into a liquid. From there, the high-pressure liquid refrigerant flows through the expansion valve and into the evaporator, where it absorbs heat and evaporates back into a gas.Rate this question:
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- 16.
Water hammer in plumbing systems is caused by:
- A.
The slow opening and closing of valves.
- B.
Change in water temperature
- C.
Oscillations in the pressure of water
- D.
A lack of air in the system
Correct Answer
C. Oscillations in the pressure of waterExplanation
Water hammer in plumbing systems is caused by oscillations in the pressure of water. When there is a sudden change in the flow of water, such as when a valve is quickly closed or opened, it creates a pressure wave that travels through the pipes. This pressure wave can cause the pipes to vibrate and shake, resulting in a loud banging noise known as water hammer. This phenomenon is often seen in older plumbing systems or systems with inadequate water pressure regulation.Rate this question:
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- 17.
Aluminum windows share all of the following problems common to metal windows except.
- A.
Corrosion
- B.
Inability to anodize
- C.
Difficult to refinish
- D.
Poor heat flow resistance.
Correct Answer
B. Inability to anodizeExplanation
Aluminum windows share common problems with other metal windows such as corrosion, difficulty in refinishing, and poor heat flow resistance. However, the one problem they do not have is the inability to anodize. Anodizing is a process that adds a protective layer to the surface of the aluminum, increasing its durability and resistance to corrosion. Therefore, aluminum windows can be anodized to further enhance their performance, making them more resistant to wear and tear.Rate this question:
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- 18.
In the refrigeration system, the heat exchanger between the refrigerent and the exterior environment is the:
- A.
Evaporator
- B.
Condenser
- C.
Compressor
- D.
Chiller
Correct Answer
B. CondenserExplanation
The correct answer is "Condenser". In a refrigeration system, the condenser is responsible for transferring heat from the refrigerant to the exterior environment. It is located after the compressor and before the expansion valve. The condenser cools down the high-pressure and high-temperature refrigerant vapor, causing it to condense into a liquid state. This heat transfer process allows the refrigerant to release heat to the surrounding environment, thus cooling down and preparing it for the next cycle in the system.Rate this question:
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- 19.
A fire damper is required in a duct system where:
- A.
The duct splits
- B.
There are duct transitions
- C.
There is a low pressure duct
- D.
The duct penetrates a fire zone barrier
Correct Answer
D. The duct penetrates a fire zone barrierExplanation
A fire damper is required in a duct system where the duct penetrates a fire zone barrier. This is because the fire zone barrier is designed to prevent the spread of fire and smoke between different areas or compartments of a building. When a duct penetrates this barrier, it creates a potential pathway for fire and smoke to spread, which can be dangerous. By installing a fire damper at the point where the duct penetrates the barrier, it can automatically close in the event of a fire, effectively sealing off the duct and preventing the spread of fire and smoke.Rate this question:
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- 20.
In conference rooms, auditoriums, and other areas of assembly, the most significant heat gain is from:
- A.
Lighting
- B.
Ventilation
- C.
Equipment
- D.
People
Correct Answer
D. PeopleExplanation
In conference rooms, auditoriums, and other areas of assembly, the most significant heat gain is from people. This is because humans generate body heat, and when a large number of people are gathered in a confined space, the combined heat produced can significantly contribute to the overall temperature increase in the room. Additionally, people also release moisture through sweat, which can further contribute to the humidity and discomfort in the space.Rate this question:
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- 21.
Which is true concerning electric heating?
- A.
It can be centralized or decentralized
- B.
It has a higher maintenance and insurance cost than fossil fuel systems
- C.
It has a fundamentally higher efficiency than fossil fuel systems
- D.
It has higher installation cost than fossil fuel systems
Correct Answer
A. It can be centralized or decentralizedExplanation
Electric heating can be centralized or decentralized, meaning that it can be installed in a central location and distribute heat to multiple areas or installed in individual units for specific spaces. This flexibility allows for customization and adaptability in heating systems.Rate this question:
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- 22.
The most popular installation method for commercial carpet is:
- A.
Single glue down
- B.
Double glue down
- C.
Stretchin using tackless strip
- D.
Stretch in using tackless strip and padding
Correct Answer
A. Single glue downExplanation
The most popular installation method for commercial carpet is single glue down. This method involves applying adhesive directly to the subfloor and then laying the carpet on top of it. This provides a secure and durable installation that is commonly used in commercial settings. Double glue down involves applying adhesive to both the subfloor and the carpet backing, but it is not as popular as the single glue down method. Stretching using tackless strip and padding is a method used for residential carpet installation, not typically used in commercial settings.Rate this question:
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- 23.
What is the most vital contribution of the owner in the construction of a new building?
- A.
Providing the project concept and requirements
- B.
Administrating the contractor selection
- C.
Acquiring the land and project approvals
- D.
Furnishing financial resources for the project
Correct Answer
D. Furnishing financial resources for the projectExplanation
The owner's most vital contribution in the construction of a new building is furnishing financial resources for the project. This is because without adequate funds, the project cannot be initiated or completed. The owner needs to provide the necessary capital for purchasing materials, hiring labor, and covering other expenses related to the construction process. The other options mentioned, such as providing the project concept and requirements, administrating the contractor selection, and acquiring the land and project approvals, are also important but cannot be accomplished without sufficient financial resources.Rate this question:
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- 24.
Which best descibes the design-build approach to construction project delivery?
- A.
The owner hires an architectural firm that serves as the owner's agent.
- B.
The owner contracts separately with a designer and a contractor
- C.
The owner contracts with a single firm that employs and architect
- D.
The owner divides a project into two or more parts and separately contracts each part
Correct Answer
C. The owner contracts with a single firm that employs and architectExplanation
The design-build approach to construction project delivery involves the owner contracting with a single firm that employs an architect. This means that the owner only has to deal with one entity throughout the entire project, from design to construction. The firm takes on the responsibility of both designing and constructing the project, streamlining the process and potentially reducing costs and time. This approach allows for better coordination and communication between the design and construction teams, leading to a more efficient and cohesive project delivery.Rate this question:
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- 25.
Which is true concerning cabling in HVAC control systems?
- A.
Coaxial cable and a twisted pair of wires are relatively inexpensive and easy to install
- B.
Coaxial cable and a twisted pair of wires are not subject to electrical interference, such as lightning
- C.
Fiber optic telephone lines can transport data long distances and are inexpensive to use and are not subject to the same failures as normal twisted-pair telephone lines
- D.
Connections of fiber optic cable to copper are inexpensive
Correct Answer
A. Coaxial cable and a twisted pair of wires are relatively inexpensive and easy to installExplanation
Coaxial cable and a twisted pair of wires are commonly used in HVAC control systems because they are cost-effective and easy to install. These types of cables are readily available and affordable, making them a practical choice for many installations. Additionally, their ease of installation allows for quicker and simpler setup, saving time and effort.Rate this question:
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Mar 21, 2023Quiz Edited by
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May 24, 2009Quiz Created by
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