All rights reserved. Printed in the United States of America. Page 4 a word that matches the picture (Listening Comprehension standard score = 84) and generate words within a category, describe scenes, and give directions (Oral Expression standard score = 83).
The power is supplied by a transformer, and when the thermostat makes contact between the 24 volt power and one or two of the other wires, a relay back at the heating/cooling unit activates the corresponding heat/fan/cool function of the unit(s).
This is where amperage comes in: an electrical appliance needs a certain amount of electrical energy to perform its job, and draws that amount of electricity from the âriverâ of volts in the line. A small device, such as a toaster usually needs less power than a larger appliance such as a refrigerator or power saw.