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. 6RQ Ch. 31 - The pressure at the manifold for natural gas is...Ch. 31 - Prob. 8RQ Ch. 31 - The typical manifold pressurefor propane gas...Ch. 31 - Why is excess air supplied to all gas-burning...

Ch. 31 - Prob. 11RQ Ch. 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. 16RQ Ch. 31 - Prob. 17RQ Ch. 31 - Prob. 18RQ Ch. 31 - Prob. 19RQ Ch. 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. 23RQ Ch. 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. 27RQ Ch. 31 - Describe how a liquid-filled flame-proving system...Ch. 31 - Prob. 29RQ Ch. 31 - Describe a flame rectification flame-proving...Ch. 31 - Prob. 31RQ Ch. 31 - Describe the difference between a single-rod...Ch. 31 - Prob. 33RQ Ch. 31 - Prob. 34RQ Ch. 31 - Prob. 35RQ Ch. 31 - Prob. 36RQ Ch. 31 - Define the dew point temperature as it applies to...Ch. 31 - Prob. 38RQ Ch. 31 - Prob. 39RQ Ch. 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. 43RQ Ch. 31 - When would a combustion blower ever interpurge a...Ch. 31 - Prob. 45RQ Ch. 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. 49RQ Ch. 31 - The ________transfers heat from the hot gas to the...Ch. 31 - Name two types of fan switches.Ch. 31 - Prob. 52RQ Ch. 31 - Prob. 53RQ Ch. 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. 58RQ Ch. 31 - Describe why you should never use a flame to leak...Ch. 31 - Prob. 60RQ Ch. 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?

Solution Summary: The author explains the process of interpurging a heat exchanger. Purging removes unwanted fumes, flue gases, and dust before each heat cycle.

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Chapter 31 Solutions