Fundamentals of HVACR Second Edition | Answers to End of Unit Questions | Latest exam Questions with Correct Answers

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UNIT 1 REVIEW QUESTIONS ANSWER KEY 1-1) List some of the different ways that homes and buildings may be heated. Wood, gas, oil, electric, solar, heat pumps, and geothermal heating systems are used.... 1-2) What were some of the primary heating fuels that early civilizations used? Wood, peat, and coal remained the primary heating fuels for centuries. 1-3) When is it believed that ice was first artificially made for food storage? First evidence of man making ice appeared more than 3,000 years ago, about 1000 B. C. 1-4) How did early man make ice? The ice was produced in shallow clay plates, about the size of a saucer. The water in these clay plates wept through the clay. This water dampened the small straw mats holding the clay plates in racks a few feet above the ground. The straw aided with evaporative cooling of the water. Under the right conditions a thin film of ice would form overnight on each clay plate. 1-5) Why did some manufacturers spray water in factories in the early 1700’s? Some manufacturers sprayed water in factories for cooling. 1-6) How did early Romans cool palaces? The Romans packed ice and snow between double walls in the emperor’s palaces. 1-7) What do the terms environmental heating and air conditioning refer to? Primarily to the control of a space’s air temperature. 1-8) What do the terms process heated and cooled refer to? They are used to aid in manufacturing or to keep equipment at the desired temperature. 1-9) When did central warm air systems for residential and commercial applications become well defined? In 1908 the essential elements for heating, cooling, humidifying, dehumidifying and filtering air were defined. 1-10) Who developed what is referred to as modern air conditioning? Willis Carrier is often credited with the development of modern air conditioning. 1-11) When did mass air conditioning of homes with window units begin? 1950s 2 1-12) Why is it important to freeze foods quickly? The problem with freezing food slowly is that when ice crystals form over time, they become much larger. These large sharp ice crystals grow through the cell walls of the food; and when the food thaws, all of the nutrients in the food are allowed to drain away. 1-13) Why do some businesses and/or local and state governments require criminal background checks for HVACR workers? To protect the public from potentially dangerous individuals involved with inhome service work. 1-14) What size range might a commercial air conditioner fit into? Systems may be as small as a fraction of a ton in size to several thousand tons in cooling capacity. 1-15) Give an example of some of the types of equipment that a commercial refrigeration technician might work on. Examples of commercial equipment and systems include refrigeration equipment found in supermarkets, convenience stores, restaurants, and other food service establishments. 1-16) What type of things might an entry-level helper do? Assist with the installation and service of residential and commercial systems, assist in lifting, carrying, or placing equipment or components and also run errands to pick up parts and clean up the area following installation or service. 1-17) Whose job is it to do the initial installation process such as install the refrigerant lines, electrical lines, thermostat and control lines, duct boots and duct run, as well as setting the indoor and outdoor units? Rough-in Installer 1-18) What skills must a service technician have? Diagnose system problems and make the necessary repairs. Service technicians must be skilled in diagnosing electrical problems, refrigerant problems, and air distribution problems. 1-19) What are some of the things that a service manager must be able to do? They must have good management skills, communication skills, and technical expertise. 1-20) What is the ICE exam, and who might take it? It is the industrial competency exam. This test is made available to students of educational institutions to test their knowledge of fundamental and basic skills necessary for entry-level HVACR technician positions. 3 1-21) What are some of the RSES’s activities? It is concerned with the education of technicians and service managers and with business improvement techniques. 4 UNIT 2 REVIEW QUESTIONS ANSWER KEY 2-1) List three student organization clubs. ACCA’s student club, RSES student club, and ASHRAE’s student club 2-2) What does RSES stand for? Refrigeration Service Engineers Society 2-3) What does ACCA stand for? Air Conditioning Contractors of America 2-4) What does AHRI stand for? Air-Conditioning, Heating & Refrigeration Institute 2-5) What does ASHRAE stand for? American Society of Heating, Refrigerating and Air-Conditioning Engineers 2-6) What does NATE stand for? North American Technical Excellence 2-7) What section of the EPA regulations requires technician certification? EPA section 608 2-8) The _____________ exam has been developed over the years with input from manufacturers, trade associations, instructors, and other industry experts. Industry Competency Exam (ICE) 2-9) What is the name of the vocational industrial club for students in high schools, trade schools, and community colleges? Skills USA 2-10) What organization was founded in the late 1990s by a group of air conditioning educators, counselors, and administrators responsible for the various aspects of HVACR training? Council of Air-Conditioning and Refrigeration Educators (CARE) 2-11) List the seven specialty areas for the NATE service technician certification program. Air conditioning, air distribution, gas heating, heat pumps, oil heating, hydronics gas service, hydronics oil service 2-12) The core exam for the NATE certification program covers what topics? The core test covers basic math, customer relations, comfort, heat transfer, and fundamentals of electricity. 2-13) What is the difference between a code and a standard? 5 Codes often carry with them the force of law and standards do not. 2-14) What precaution should be taken if you find that during the course of the day your uniform becomes soiled? Carry an extra clean shirt in the service van that you can change if necessary. 2-15) When might it be necessary for you to use a drop cloth? When working on an indoor furnace or below a pull down stair casing leading to the attic. 2-16) When making a repair, what information should you relay to the customer? Tell the customer what failed, why it failed, and the options to fix the problem. 2-17) If you locate an additional problem or pending problem with a customer's system and they choose not to have you provide that repair, what should you do? Note that on the customer's invoice as part of your service call record keeping. 2-18) What is one of the primary complaints that customers have regarding service calls? Punctuality! 2-19) Why are many common drinks, such as sodas, not adequate for your protection against heat stress injury? Because they do not replace the body’s electrolytes 2-20) When would it be appropriate to tell the customer that the previous technician messed up their system when performing the last service call? Never! 6 UNIT 3 REVIEW QUESTIONS ANSWER KEY 3-1) Tell what causes accidents and how they can be eliminated on the job site. Most accidents are caused by carelessness, as well as lack of awareness of proper safety procedures. Accidents can be virtually eliminated by good working habits, good tools, and [Show More]

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