Skip to main content

Bartleby Sitemap - Textbook Solutions

All Textbook Solutions for Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

20RQ 21RQ 22RQ 23RQ 24RQ 25RQ 26RQ 27RQ 28RQ 29RQ 30RQ 31RQ 32RQ 33RQ 34RQ Draw a wiring diagram using a contactor to control a compressor; the contactor will be controlled by a single-pole–single-throw switch. 36RQ What is the purpose of a thermostat in a control system? 2RQ 3RQ 4RQ 5RQ True or False: A bimetal is a combination of two pieces of metal that are welded together, each with a different coefficient of expansion. 7RQ Which of the following methods are used to ensure snap action of low-voltage thermostat elements? mercury bulbs and small permanent magnets small permanent magnets and springs springs and solenoids solenoids and mercury bulbs 9RQ 10RQ 11RQ 12RQ 13RQ 14RQ 15RQ 16RQ 17RQ 18RQ 19RQ 20RQ 21RQ 22RQ 23RQ 24RQ 25RQ 26RQ 27RQ 28RQ 29RQ 30RQ 31RQ 32RQ 33RQ 34RQ 35RQ How is the clock portion of a clock thermostat powered? 37RQ 38RQ 39RQ 40RQ 41RQ 42RQ 43RQ 44RQ 45RQ 46RQ 47RQ 48RQ What is the advantage of using solid-state devices in electronic control systems?Semiconductors are ____________. conductors insulators half conductors none of the above Diodes and rectifiers allow current to _________. flow in one direction only flow in both directions divide paths of flow none of the above What is the difference between a diode and rectifier? A thermistor is a resistor that changes resistance with _________________. pressure sound light temperature What are the two types of thermistors and how are they different? What materials are used to make semiconductors? What is a transistor? The transistor is used ____________. as a signal to amplify a signal both a and b none of the above Briefly explain the rectification circuit shown in Figure 12.9. What is the difference between a one-function and a multifunction electronic control device? Label the following components as one-function (a) or multifunction (b) electronic modules. _____a. defrost module _____b. heat pump electronic control module _____c. electronic timer _____d. gas furnace electronic control module _____e. three-phase motor protector _____f. phase loss monitor _____g. anti-short-cycling device _____h. three-phase motor monitor What is the purpose of an anti-short-cycling device? 14RQ 15RQ 16RQ 17RQ 18RQ 19RQ 20RQ 21RQ 22RQ 23RQ 24RQ 25RQ 1RQ Which of the following types of heating systems is most popular in the commercial and industrial section of the industry? air water steam either b or c 3RQ 4RQ 5RQ 6RQ 7RQ Explain the operation of the three types of fan switches used in the industry. 9RQ 10RQ 11RQ 12RQ 13RQ 14RQ 15RQ True or False: A thermocouple is strong enough to close the pilot safety solenoid in a gas valve. 17RQ 18RQ 19RQ 20RQ 21RQ 22RQ 23RQ 24RQ 25RQ 26RQ 27RQ 28RQ 29RQ 30RQ 31RQ 32RQ 33RQ 34RQ 35RQ 36RQ 1RQ 2RQ 3RQ 4RQ 5RQ 6RQ 7RQ 8RQ 9RQ 10RQ 11RQ 12RQ 13RQ 14RQ 15RQ 16RQ 17RQ 18RQ 19RQ 20RQ 21RQ 22RQ 23RQ 24RQ 25RQ 26RQ 27RQ 28RQ 29RQ 30RQ 31RQ 32RQ 33RQ 34RQ 35RQ What is the purpose of an air-conditioning control system? 2RQ 3RQ 4RQ 5RQ 6RQ 7RQ 8RQ 9RQ 10RQ 11RQ 12RQ 13RQ 14RQ 15RQ 16RQ 17RQ 18RQ 19RQ 20RQ 21RQ 22RQ 23RQ 24RQ 25RQ 26RQ 27RQ 28RQ 29RQ 30RQ 31RQ 32RQ 33RQ 34RQ 1RQ 2RQ 3RQ 4RQ 5RQ 6RQ 7RQ 8RQ 9RQ 10RQ 11RQ 12RQ 13RQ 14RQ 15RQ 16RQ 17RQ 18RQ 19RQ 20RQ 21RQ 22RQ 23RQ 24RQ 25RQ 26RQ 27RQ 28RQ 29RQ 30RQ 1RQ 2RQ 3RQ 4RQ 5RQ 6RQ 7RQ 8RQ 9RQ 10RQ 11RQ 12RQ 13RQ 14RQ 15RQ 16RQ 17RQ 18RQ 19RQ 20RQ 21RQ 22RQ 23RQ 24RQ 25RQ 1RQ 2RQ 3RQ 4RQ 5RQ 6RQ 7RQ 8RQ 9RQ 10RQ 11RQ 12RQ 13RQ 14RQ 15RQ 16RQ 17RQ 18RQ 19RQ 20RQ 21RQ If the unit is operating in cooling mode, the outdoor fan motor is not operating, and all other loads are operating properly, what could be the problem? bad defrost relay contacts bad contactor blown fuse bad transformer 23RQ 24RQ 25RQ

Page: [1][2]