Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN: 9781305578296
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
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Textbook Question
Chapter 31, Problem 50RQ
The ________transfers heat from the hot gas to the airstream to heat the structure.
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Chapter 31 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 31 - The four types of gas furnace airflow patterns are...Ch. 31 - Describe the function of a multipoise or...Ch. 31 - Describe the function of a draft safeguard switch.Ch. 31 - Where are auxiliary limit switches used in heating...Ch. 31 - The specific gravity of natural gas is A. 0.08. B....Ch. 31 - Prob. 6RQCh. 31 - The pressure at the manifold for natural gas is...Ch. 31 - Prob. 8RQCh. 31 - The typical manifold pressurefor propane gas...Ch. 31 - Why is excess air supplied to all gas-burning...
Ch. 31 - Prob. 11RQCh. 31 - True or False: All gas valves snap open and...Ch. 31 - Which of the following features does an automatic...Ch. 31 - What is the function of the servo pressure...Ch. 31 - What is a redundant gas valve?Ch. 31 - Prob. 16RQCh. 31 - Prob. 17RQCh. 31 - Prob. 18RQCh. 31 - Prob. 19RQCh. 31 - What is an integrated furnace controller (IFC)?Ch. 31 - What is meant by the warm-air blower's off-delay...Ch. 31 - What are dual-in-line-pair (DIP) switches?Ch. 31 - Prob. 23RQCh. 31 - Describe the two types of pilot lights.Ch. 31 - True or False: A thermocouple develops direct...Ch. 31 - Describe how a thermocouple flame-proving system...Ch. 31 - Prob. 27RQCh. 31 - Describe how a liquid-filled flame-proving system...Ch. 31 - Prob. 29RQCh. 31 - Describe a flame rectification flame-proving...Ch. 31 - Prob. 31RQCh. 31 - Describe the difference between a single-rod...Ch. 31 - Prob. 33RQCh. 31 - Prob. 34RQCh. 31 - Prob. 35RQCh. 31 - Prob. 36RQCh. 31 - Define the dew point temperature as it applies to...Ch. 31 - Prob. 38RQCh. 31 - Prob. 39RQCh. 31 - What are four factors that determine the...Ch. 31 - What is a 100% shutoff system?Ch. 31 - What is the difference between a hard and a soft...Ch. 31 - Prob. 43RQCh. 31 - When would a combustion blower ever interpurge a...Ch. 31 - Prob. 45RQCh. 31 - An orifice is a drilled hole in a _______.Ch. 31 - A______ distributes gas to the various burners.Ch. 31 - True or False: An orifice measures the quantity of...Ch. 31 - Prob. 49RQCh. 31 - The ________transfers heat from the hot gas to the...Ch. 31 - Name two types of fan switches.Ch. 31 - Prob. 52RQCh. 31 - Prob. 53RQCh. 31 - Describe how a two-stage furnace operates.Ch. 31 - Describe how a modulating furnace operates.Ch. 31 - What is a variable-output programmable thermostat?Ch. 31 - Why is a metal vent often preferred rather than a...Ch. 31 - Prob. 58RQCh. 31 - Describe why you should never use a flame to leak...Ch. 31 - Prob. 60RQCh. 31 - A _____________sample is taken from the flue gas...
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- When would a combustion blower ever interpurge a furnace's heat exchange?arrow_forwardWhat is the total length of this furnace and air-conditioning system?arrow_forwardIdentify the amount of enthalpy needed in order to turn steam into 450g h20 (water) that is located at a temperature of 85 degrees Fahrenheit ANS: _____ British Thermal Unitarrow_forward
- Which is the most accurate description of one of the system's processes? A Fluid moves from the secondary pipes into the ground. B Fluid moves from the primary pipe into the building. Fluids circulate separately inside both pipes. D Fluid moves from the secondary pipe through the heat exchanger to the primary pipe.arrow_forwardWhich of the following statements about PTC heaters is not true? Some vehicles have a PTC heating element in the heater core. Some vehicles have a PTC element installed in an air duct from the blower housing to increase the air temperature in the ducts. PTC heaters are electronically controlled and work with the cooling system to provide hot coolant. PTC elements are small ceramic stones that react quickly to changes in current.arrow_forwardHow can a thermocouple be used to verify that a gas flame is present?arrow_forward
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