The type of copper tubing that has the thickest wall is Type _____.
a. 25
b. L
c. Z
d. K
d. K
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Answer the following statement(s) true (T) or false (F)
1. Two methods of igniting the main burner exist today. 2. Probably the oldest method of automatically igniting a main burner is with a pilot light. 3. The thermocouple can produce enough current to reopen the valve if it is closed. 4. The “fire eye”gas flame sensor detects the heat of a flame. 5. Gas control valves direct the flow of gas to the main burner and the pilot light, if used.
The angularity geometric characteristic symbol is a part of the ____________________ category.
Fill in the blank(s) with the appropriate word(s).
Todos los tipos de cuerpos de tuberías eléctricas siguientes pueden utilizarse como punto de acceso para tuberías eléctricas que requieran un cambio de dirección de 90° EXCEPTO:
a. LL. b. LB. c. X. d. C.
Coal and petroleum are examples of
What will be an ideal response?