What materials are used to make straight carbide inserts?
A) Titanium carbide and cobalt
B) Cobalt and tungsten carbide
C) Tantalum carbide, tungsten carbide, titanium carbide and cobalt
D) Tungsten, cobalt and titanium
B
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What is the main difference between a heat pump and a fossil fuel furnace?
A) Heat pumps move heat instead of creating it. B) Fossil fuel furnaces are hotter. C) Heat pumps are easier to install. D) Fossil fuel furnaces have been around longer.
Types of humidifiers used with commercial air handling equipment include
A) bypass, atomizing, and wetted media B) steam grid, steam pan, and direct water spray C) direct expansion, chilled water, and steam D) direct expansion, steam, and hot water
Start capacitors are filled with oil and enclosed in a metal case.
Answer the following statement true (T) or false (F)
Cuando se utiliza una escalera recta, los rieles a los lados se deben extender _____ por encima del punto de apoyo superior.
a. 12" (30,48 cm) b. 18" (45,72 cm) c. 24" (60,96 cm) d. 36" (91,44 cm)