HTM 322 EXAM3 Study Guide (also good for final exam)
HTM 322 EXAM3 Study Guide (also good for final exam) HTM 322
Popular in facility management
Popular in Human Development
This 14 page Study Guide was uploaded by Alicia Yan on Thursday April 21, 2016. The Study Guide belongs to HTM 322 at Purdue University taught by Dr. Nelson in Spring 2016. Since its upload, it has received 15 views. For similar materials see facility management in Human Development at Purdue University.
Reviews for HTM 322 EXAM3 Study Guide (also good for final exam)
Report this Material
What is Karma?
Karma is the currency of StudySoup.
You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!
Date Created: 04/21/16
HTM 322 Hospitality Facilities Management Study guide Chapter 7 Heating, Ventilation, and Air Conditioning Systems: 1. Compare and contrast natural and mechanical ventilation. Include any advantages or disadvantages associated with either type of ventilation Natural: Ad: Dis: Limited control on rate, can open or close windows, but can not control how fast the wind is blowing / Can not control temperature of incoming air Mechanical: Ad: Can control the rate of air flow/ Can direct through a ventilation system to condition air before it is introduced into the room/ Can direct air anywhere inside the facility Dis: 2. Describe central, room, and zoneventilation systems. Central: Single air handling system circulated air throughout the entire facility Advantages: (cheapest to installed and operate) Efficient system for large buildings Prevent rooms from developing stale odors when unoccupied Disadvantages: () If the system fails, the entire facility is without ventilation (most important one) If recirculation is used contaminates from one room could be spread throughout the entire building Room: each individual room has its own air handling system Advantages: If system fails only one room is affected Contaminate are not shared between rooms Disadvantages: Initial costs are higher f for large buildings High maintenance costs Zone: the building is divided into zones and each zone has its own air handling system Advantages: More efficient than room systems Failures only affect one zone, not the whole building Contaminates are only shared within zones Can be retrofit into older buildings easier than a central system Disadvantages: Not as efficient as central systems Failures affect more than one room Contaminates are shared within zones Higher installation cost than central 3. What are the advantages and disadvantages of central, room, and zoneventilation systems? See above 4. Can room heating/cooling be incorporated into a central or zoneventilation system? If so, are there any advantages/disadvantages to doing this? Yes. Advantage: most cost effective and energy efficient way operationally to prevent your rooms from becoming stale. Hugely expensive initially 5. What are ductless hoods? What are the advantages and disadvantages of ductless hoods? Ductless hoods: A hood that filters the air coming off the equipment then returns it to the room. AD: Can be used in locations where it is not possible to run a duct to the exterior of the building. DIS: a.Cannot be used on gas equipment/ Typically, does not remove heat. 6. Describe the four main types of filters used to remove dust and other particles from air entering or circulating within a building, be sure to note any advantages or disadvantage for each. Dry filter: Low resistance to flow, but only traps large particles. Newer pleated filter rival electronic filters (very very not efficient) Oil treated filter: Oil is sprayed on dry filters (not pleated filters) to improve their efficiency. Water spray filter: Removes dust, smoke, and odors. Also humidifies and cools the air. (used on commercial process. We used it in restaurants, kitchen, 100% relative humidity, it does remove dust and smell) Electronic filter: Electric current charges particles which are attracted to the screen, low resistance to flow, extremely efficient, high installation costs, low operating cost, some earlier model experienced performance difficulties. (This is not a singer pass filter, remove smoke and odor and produce ozone) 7. Describe the two main ways to provide the makeup air needed for kitchen hoods. Air from the room: Air from outside. 8. What is the problem with relying too much on air from the room to provide makeup air for kitchen hoods? Too expensive 9. What are the three ways to provide makeup air discussed in class? Which of the three ways will allow you to provide the most air and with one would allow you to provide the least air? Short circuit: Only 15% makeup air should come from this source. Vents near, but outside the hood: Only about 20% of the makeup air should come from this source. Rear discharge: Can supply up to 60% of the required makeup air 10. Describe the two types of commercial exhaust fans, which one is more common and why? Up blast & down blast Up blast used the most common because it keeps the grease off your roof 11. What are the advantages and disadvantages of each type of filter discussed in class? See above 12. When and are the two types of grease filters discussed in class? How are they different? Baffle filters: Air is rushed through the filter at 250 to 350 feet per minute. Extractors: air is moving much faster through the baffles, 1000 to 1200 feet per minute. 13. Why is it important to maintain indoor air quality? 1. To maintain the quality of indoor air and prevent "sick" building syndrome. 2. Reduce deterioration of facility and furnishings 3. Reduce the need for dusting of surfaces 4. Required by building codes 14. List the symptoms of "sick" building syndrome. Eye, nose, throat, and respiratory irritation/ Headache/ Fatigue/ Dizziness/ Mental confusion 15. According to the National Institute for Occupational Safety and Health, what is the leading cause of indoor air quality problems? National Institute for Occupational Safety and Health found that 52% of all indoor air quality problems were due to inadequate ventilation. 16. Define the following terms: a. Air conditioning: changing one or more property to the air b . Drybulb temperature: Measures sensible heat. This is what the thermostat in a room measures. c. Wetbulb temperature: Measures total heat content of the air. Is used to determine relative humidity. d. Dewpoint temperature: Measures the latent heat of the air. This is the temperature when the air is saturated with water and droplets of water start forming on objects (dew drops). 17. How do the following affect human comfort? a. Temperature: if the temperature too hot or too cold, it affects human comforts. b. Humidity: your body losing moisture constantly, temperature and humidity, if one goes up the other one must do down. c. Air movement: It magnifies the impact of temp and humidity 18. Why are the ideal temperature settings higher in the summer than in the winter? Because outside are really hot like 90 degrees inside will feel cool at 75 degrees 19. How does an adobe keep interior at a comfortable temperature without using an air conditioning system? They are thick mud wall that absorb heat from outside can cool the inside temperature. During the night the mud cool down and give out heat inside the room to warm it up. 20. What is the function of each of the following components of an airconditioning system. a. Damper: Stops or regulates the flow of air inside a duct or other air handling equip.Works like a register in your home (thing usually on floor) b. Filter: Remove unwanted particles from the air. Energy saving device c. Preheater: Heat exchange, energy conservation, makes air easier to humidity, energy saving device d. Precooler: Make it easier to add moisture e. Humidifier: Adds moisture f. Dehumidifier: Remove moisture g. Fan: Moves air through the system and the entire building 21. Why is it important for filter 过过过 to be located before the preheater, precooler, humidifier, dehumidifier, and fan? Because of fouling (dusty and messy) 22. Why is it important that the preheater be installed before the humidifier? Makes air easier to humidify warm air 23. Why is it important that the precooler be installed before the dehumidifier? Makes air easier to dehumidify air that is cooler 24. What are the advantaged and disadvantages of each of the two types of fans discussed in the class? Two main types of fans: axial and radial. Radial fans are more expensive to install and operate than an axial fan. They are also noisier. However, they function better than axial fans under varying loads. 25. Which of the two types of fans discussed in class most commonly used in HVAC systems, and why? Radial (nosier, less efficiency and expensive but we used it because it is easy to handle vary load) HTM 322 Hospitality Facilities Management Study guide Chapter 8 Lighting Systems 1. List the eight different types of lamps discussed in the class. Rank the bulbs as far as energy efficiency, color rendering ability, life cycle cost, and average rated life) of each and where are they normally used? Incandescent 424 lm/W (7502000hr shortest life/ high cycle cost/ good color rendering) Tungsten Halogen 833 lm/W (20004000hr/ high cycle cost/ good color rendering) Mercury Vapor 1943 lm/W (24,000+ hr/ moderate cycle cost/ poor to fair color rendering) Compact Fluorescent 2468 lm/W (7,00020,000 hr/ moderate cycle cost/ moderate color) Metal Halide 2886 lm/W (600020000 hr/ moderate cycle cost/ faire to moderate color rendering) Fluorescent 4989 lm/W (not good at cold weather) (750024000 hr/ low cost/ faire to good color) High Pressure Sodium 22115 lm/W (1600024000 hr/ low cost/ poor to fair color) Low Pressure Sodium 50150 lm/W (1200018000 hr/ low cost/ very poor color) 2. List five factors affecting lighting levels. a. Contrast between object being viewed and surrounding area b. Reflectivity of the surrounding area c. Size of the object d. Viewing distance e. Viewing time 3. Describe the contrast and what affects the level of contrast. 4. Describe the impact of the five colors discussed in class. HTM 322 Hospitality Facilities Management Study Guide Chapter 9 Management of Laundry Systems 1. List describe the laundering alternatives available in hospitality operations. What are the advantages and disadvantages of each? Linen rental: The property rents linen from the commercial laundry. The laundry picks up dirty linen, cleans it, repairs or replaces pieces as required, the returns it to the operation. Pros: smallest investment, minimal storage room, commercial laundry maintains inventory Cons: least control of quality, problems covering emergencies, delivery problems Commercial laundry service: The property owns the linen, the commercial laundry picks up the linen, cleans it, then returns it to the property. Pros: smaller investment, more control of linen quality Cons: highest inventory of linen, delivery problems Onpremises laundry: Property maintains its own laundry and linens. Pros: greatest control of quality, respond to emergencies quickly Cons: highest capital investment, additional staffs and space to do laundry Disposable linens: Products that are used once then thrown away. Hospitality industry typically uses paper towels, napkins, and table coverings. Pros: less storage space, items are sanitary and convenient Cons: quality is not equivalent to other methods, increase amount of waste 2. What laundry problems are associated with hard water, and what is the maximum water hardness before softeners must be added with the detergent, before a complete softening system must be used? Hard water can damage equipment, increase detergent usage, and damage linen. Hard water salts can combine with detergents to form soap curds. Hardness between 5 grains (85 ppm) and 10 grains (171 ppm): must use synthetic detergent containing a softening agent. Hardness greater than 10 grains (171 ppm): complete softening system required 3. Describe the steps for planning an onpremises laundry. HTM 322 Hospitality Facilities Management Study Guide Chapter 13 Building Structures, Finishes and Site 1. What is the purpose of a foundation? Distribute the weight of the building so that the building does not experience excessive shifting or settling 2. What is the enemy of foundations? Water 3. What dictates the type of foundation needed? 4. Describe the two main types of foundations and specify when each is used. 5. What exterior system is exposed to the harshest conditions? Roof 6. What are the effects of each of the environmental conditions on roofing materials? Direct sun, which can destroy water proofing materials. Rain, which can pool on flat roofs, or behind an ice dam. Snow, which can build up and cause the roof to collapse Ice, which can crack and lift the roofing material Wind, which and lift and remove roofing material. Dirt and pollution, which can destroy the roofing material. Worker, which walk on it, possibly damaging the UV light protection or the water proofing layer. 7. On average, one dollar of damage to the roof equates to how much related damage to other parts of the facility? 8. What is the function of a roof deck? Supports the roofing and prevents excessive shifting and deformation of the roofing. 9. Describe the materials that roof decks are commonly made from. Be sure to include any special considerations associated with a particular decking material. Wood: Typically, a composite material, it is light and relatively inexpensive. Steel: Strong and stiff, is frequently used for flat roofs. Concrete: Can be cast in place or precast. Concrete shingles are also available for pitched roofs. GypsumConcrete: Similar to concrete, but is usually lighter. it is not as strong and is not suitable for buildings with high humidity interiors. 10. What is the function of the vapor barrier in a roofing system and where should it be located? Vapor barrier: This prevents moisture from condensing in the insulation or on the surface of the deck. Placed between the warm interior of the building and the insulation. 11. What is the function of the air gap and where should it be located in a roofing system? Location: An air gap should be present between the roof and the ceiling of the top floor. Function: Air should be moving through the gap, carrying away heat that has moved through the roof. The roof will remain cooler if the air gap is between the insulation and the deck. 12. Describe the different types of materials used on flat roofs. What are the advantages and disadvantages of each? 13. Describe the different types of materials used on pitched roofs. What are the advantages and disadvantages of each? Composite shingles: Fiberglass reinforced asphalt shingles. Long life, relatively inexpensive. Cons: Heavier shingles generally have a longer life abut are more expensive. Exotic shingles: Wood: fire hazard and expense Concrete: damaged by freezing water Tile 瓷瓷: not as susceptible to damage due to freezing air Slate瓷瓷: most expensive, but last long time Rolled roofing: Can have same appearance as composite shingles, because it is easier to apply, may be cheaper. Metal: Can be rolled or shingles. 14. What happens if a roof covered in fiberglass reinforced asphalt shingles gets too hot? Crack and curve 15. When should roofs be inspected and what do you look for? a. Inside the attic? Look for holes (light entering the attic), and leaks. Signs of leaks include discoloration, rust, peeling, and warped material. b. On the roof? Blocked drains/ damaged flashing and other terminal points/ pooled water (shoule be dry in 48 hr) problem around entries into the roof/ 16. What are the major objectives to be accomplished by sign systems? Identity property, set the mood, supplement marketing, provide information, influence guest’s behavior. 17. What are the major concerns when installing large outdoor signs? 14. What are some of the ways to reduce landscaping and grounds maintenance costs? Planting mature plants/ disease and insectresistant plants/ Plant local plants/ Install automatic irrigation system/ Don’t over fertilize 15. What additional requirements must be met by belowgrade parking structures that need not be met by abovegrade parking structures? Belowgrade structure must have mechanical systems to remove water and provide ventilation. 16. Describe how density, twist, and pile weight generally impact the durability and wear of the carpet. The more is has, the longer it last, the greater density it has, the more durability it has, the thicker it is, the longer it last HTM 322 Hospitality Facilities Management Study guide Chapter 8 Cooling Systems 1. List and describe the components of a vapor compression cycle. 2. What is the function of a compressor? Increase pressure 3. What is the state of the refrigerant entering the compressor? Leaving the compressor? Gas> gas 4. What is the function of condenser? gas> liquid 5. What is the state of the refrigerant entering the condenser? Leaving the condenser? Why is there a change of state? gas> liquid (cool down the high temperature gas to get moisture out from gas in order to cooling) 6. What is the function of the expansion valve? reduce pressure 7. What is the state of the refrigerant entering the expansion valve? Leaving the expansion valve? Liquid>liquid 8. What is the function of the evaporator? Liquid>gas 9. What is the state of the refrigerant entering the evaporator? Leaving the evaporator? Why is there a change of state? Liquid>gas (increase temperature of liquid to evaporate in order to absorb heat from air) 10. At which components of the vapor compression cycle is energy added? Compressor/ Evaporator 11. At which component of the vapor compression cycle is energy removed? Condenser 12. A standard room dehumidifier is nothing more than a selfcontained vapor compression cycle, does a dehumidifier tend to raise or lower the temperature of the room it is in? Why? A dehumidifier raises the temperature in the room it is in. The evaporator takes the air in and cools it to below dew point, which causes the moisture to come out of the air. That same air blows across the hot condenser coil and is heated to above room temperature. This hotter air is then blown into the room, therefore raising the temperature. 13. In which component of the vapor compression cycle is the pressure of the refrigerant high when it enters and when it leaves? Condenser 14. In which component of the vapor compression cycle is the pressure of the refrigerant low when it enters and when it leaves? Evaporator 15. What happens to the room temperature and the components of the vapor compression cycle if the fan on the condenser of a vapor compression cycle breaks? The temperature inside will be going up and the whole system will shut down because the air conditioner is not functioning, burn out the compressor 16. What is the best way to improve the efficiency of a vapor compression cycle? Used water cool condenser lower the temperature of condenser 17. Which of the following generally requires more energy to run the compressor, a system with an air cooled condenser or one with a water cooled condenser? Why? The air cool condenser required more energy to run this system The water cool condenser required less energy to run because water remove heat faster than air 18. List and describe the component of the lithium bromide absorption cycle? 19. At what components in the lithium bromide absorption cycle is heat added to the cycle? Generator: generate steam, add heat Condenser: to make gas to remove heat 20. At what components in the lithium bromide absorption cycle is heat removed from the cycle? Evaporator Absorber 21. Where is the pressure high and where it is low in the lithium bromide absorption cycle? Lower: absorber / evaporator High: condenser 22. Where are the expansion valves located in the lithium bromide absorption cycle? Between condenser and evaporator in order to maintain the pressure difference bwtween condenser and evaporator. 23. What draws the water vapor from the evaporator to the absorber? The evaporator sprays water from the condenser over pipes to chill water in the pipes 24. What happens at the generator in the lithium bromide absorption cycle? What two products are generated and where does each go next. Regenerate the steam and stronger brine. Since steam generated, the brine become stronger, then stronger brine go down to absorber 25. What happens in the lithium bromide absorption cycle absorber? It absorbs water vapor back into the solution; strong brine and water vapor comes in 26. What three components of the lithium bromide absorption cycle perform the same function as the compressor in the vapor compression cycle? Absorber, generator and pump 27. What is the function of the pump? (Why does the weak brine move to the generator?) Increase pressure 28. What is a swamp cooler used for? How does it work? Water is sprayed into the air. As water evaporates it pulls heat out of the air, thus lowering the temperature. 29. What is a water cooling tower used for? How does it work? Water drips down the side and evaporate, making the temperature cooler. 30. Describe the importance of and the required maintenance for a vapor compression cycle (air conditioner). 31. Describe the importance of and the required maintenance for lithium bromide absorption chiller. 32. Describe the importance of and the required maintenance for a swamp cooler. 33. Describe the importance of and the required maintenance for a water cooling tower. HTM 322 Hospitality Facilities Management Study guide Heat Transfer: 1. What is temperature? 2. What heat and what are the common units for heat? 3. Describe the two different types of heat? Which contains the most energy? Sensible 1 calorie to change the temperature of 1 gram of water Latent 80 calories to thaw 1 gram of ice. Contain more energy. 4. Describe the two types of latent heat? Which one contains the most energy? Vaporization: contains most energy (gas>liquid) Fusion: (liquid> soild) 5. Describe conduction and convection, what are the driving forces and resistances for each? 6. How can the rate of heat transfer be reduced? Adding insulation and reduce the driving forces 7. How can the resistance to heat transfer due to conduction be increased in a building? Add insulation 8. How can the driving force for heat transfer be reduced in a building? Reduce temperature difference (set the inside temperature close to outside temperature) 9. How are degree days calculated and what are they used for?
Are you sure you want to buy this material for
You're already Subscribed!
Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'