The benefits of electric baseboard heating are that ____.
A. each room can be controlled individually
B. they are inexpensive to install
C. they operate on a 24-V power supply
D. both a and b
Answer: D
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Figure 39-2
When the START button is pushed in the accompanying figure, relay coil CR is energized. This causes all CR contacts to close. Contact CR-1 is a(n) ____________________ used to maintain the circuit to coil CR when the START button is released.
Fill in the blank(s) with the appropriate word(s).
____________________ radiation amounts vary across the country.
Fill in the blank(s) with the appropriate word(s).
Do iron-core inductors or air-core inductors generally have the larger inductance?
A) iron core B) neither; iron-core inductors and air-core inductors have the same inductance C) air core D) There is no way to tell.
Gate circuits are multi-input, ____________________-output devices.
Fill in the blank(s) with the appropriate word(s).