Why are piercing valves used in refrigerant work?
A) To remove a process tube B) To install a gauge manifold set
C) To access a sealed system D) To allow a constant evacuation
C
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The hub of a wind turbine is 137.4 ft. above the ground. The length of a blade is 72.7 ft?. Find the distance from the ground to the blade tip when it is closest to the ground.
Fill in the blank(s) with the appropriate word(s).
Name the views shown on the drawing.
Review drawing number 522895A0A and then answer the question.
Which is more fire safe-FSI = 10, or FSI = 50?
What will be an ideal response?
Why are the stubs on compressors and filter driers more difficult to braze than copper pipe?
A) They have a thin copper coating that is easily oxidized by overheating. B) They are difficult to get to. C) They are typically made of aluminum which is much harder to braze. D) It is easy to burn a hole in the compressor or drier shell.