The protector block:
A) connects the telephone cord to the inside house wiring
B) connects a subscriber's line to the switches
C) connects the outside plant cable to the subscriber's premises
D) is mounted on the outside of a house by the local telephone company to terminate the telephone wire pair
D
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Water containing chlorine and fluoride is beneficial to plants because it decreases the occurrence of disease
Indicate whether the statement is true or false
Why must the expansion tank always be located higher than the boiler?
What will be an ideal response?
In the figure above, symbol A represents a _____
a. float switch
b. temperature switch
c. pressure switch
d. foot switch
Answer the following statement(s) true (T) or false (F)
1. When a bumper arm is impacted, it will not cause the contacts to change position. 2. Limit switches contain only a single set of contacts. 3. Limit switches are momentary contact (spring returned), but not maintained contacts 4. The basic micro switch can be obtained with a variety of different activating arms. 5. A subminiature microswitch employs a similar spring contact arrangement as the basic micro switch.