Study guides, Class notes & Summaries

HVAC Study Questions with Correct Answers Which of these heating methods is most commonly used as a heat source in cold climates? - Answer-Natural gas furnaces Which of the following is a device used to maintain indoor air quality? - Answer- Ultraviolet light The purpose of an evaporator in the refrigeration cycle is to - Answer-transfer heat from the air to the refrigerant Heat can be transferred from a refrigerant to the outdoors on a hot day because the - Answer-refrigerant is warme...

HVAC FINAL EXAM QUESTIONS AND ANSWERS ALL CORRECT Which of the following would have the greatest effect on the heat content of the refrigerant? A) The refrigerant's humidity B) The refrigerant's state C) The refrigerant's temperature D) The refrigerant's pressure - Correct Answer B) The refrigerant's state A mechanical refrigeration system cools a room by: - Removing heat from the room. The four types of cooling mechanisms are: - Evaporative, Thermoelectric, Absorption, Mechani...

HVAC Exam Questions with Correct Answers What is the difference between the Oxygen we breath and the ozone in the earths stratosphere - Answer-Ozone is a form of oxygen, with each molecule consisting of three atoms of oxygen O3 , The oxygen we breath contains two atoms, O2 Describe the difference between good and bad ozone - Answer-Good Ozone like the stratosphere protects the earth from harmful ultraviolet rays from the sun, Bad Ozone, Like the Troposphere is considered unwanted ozone bec...

HVAC Exam Questions with Correct All Answers An electric heating unit in a duct system is classified as a - Answer-forced draft convector Radiant heat is transferred by? - Answer-infrared rays The limit switch is used on the electric element assembly to - Answer-open the circuit to the element if the furnace overheats Technician "A" says that a fusible link can be jumped out temporarily to allow the customer to get heat until the next business day. Technician "B" says that if the...

HVAC Exam Questions with All Correct Answers The refrigerant in a condenser in a refrigeration system . - Answer-rejects heat The condenser in a refrigeration system . - Answer-Answer: All of the above A normally operating water-cooled condenser is operating with a 10°F differential between water in and water out. If scale forms on the water tubes and the entering water is 85°F, which of the following is possible? - Answer-d. Both a and b are correct. a. The outlet water temper...

HVAC EXCELLENCE EXAM QUESTIONS AND ANSWERS 100% PASS Heat which causes a change in temperature of a substance is called - Correct Answer ️️ -sensible heat, Heat added to a substance without a rise in temperature; (example: liquid refrigerant to gas) this process la called? - Correct Answer ️️ -latent heat Heat added to the refrigerant in vapor state after the evaporation process is called, - Correct Answer ️️ -superheat A scroll compressor moves refrigerant by means of; - Cor...

HVAC (EPA Certification Exam Section 608) Questions and Answers 100% Pass How many types of HVAC certifications are there? - Correct Answer ️️ -There are 4 types. What does a metering device do? - Correct Answer ️️ -The metering device causes a reduction in pressure, and therefore a reduction in saturation temperature. What is absorbed in the evaporator? - Correct Answer ️️ -Heat is absorbed in the evaporator. What happens in the evaporator? - Correct Answer ️️ -Heat is a...

HVAC Electrical Test 100% Correct Solved Current flow is - Correct Answer ️️ -the flow of electrons in the circuit impedance is - Correct Answer ️️ -opposition to alternating current flow like charges - Correct Answer ️️ -repel each other Any material that will readily release electrons is called - Correct Answer ️️ -a conductor the symbol for current is - Correct Answer ️️ -I Which of the following materials would best be suited for use as a semi-conductor - Correct ...

HVAC Test 1 100% Correct Solved 2024 Absorption - Correct Answer ️️ -A refrigeration cycle where input energy is heat Adiabatic - Correct Answer ️️ -without gain or loss of heat Air Conditioning - Correct Answer ️️ -controlling air temperature humidity and quality Air Cooled Condenser - Correct Answer ️️ -a heat exchanger that transfers building heat to outdoor air Air Handler - Correct Answer ️️ -air moving equipment that can change air temperature humidity and qualit...