?What are some of the defects that the root weld face may have that are acceptable as long as the root surface is correct?
A. ?cracks and porosity
B. ?undercut and overlap
C. ?arc strikes and worm holes
D. ?None of the above
Answer: D
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Answer the following statement(s) true (T) or false (F)
1. Nonconductive optical fiber cables can be run in the same raceway or cable tray as Class 1 circuits. 2. Plastic optical fibers are a preferred choice in extreme temperatures. 3. Light travels in the form of an electromagnetic wave. 4. There is a difference between the index of refraction between the core and cladding of an optical fiber cable . 5. Loose-tube cable is more commonly used inside a building.
When evacuating a system, the technician should use __________ or __________ hoses as synthetic hoses are __________ (they allow gases to penetrate)
What will be an ideal response?
The concrete placement device called a tremie is also described as a _____
a. spout b. giraffe?s neck c. drop chute d. elephant trunk
Adiabatic expansion means:
A) Expanding by applying a strong magnetic field to a polarized substance. B) Expanding by adding heat. C) Expanding without adding heat. D) Expanding through the use of centrifugal force.