The advantage of ball valves over other types of manual refrigeration valves is that they:

A) Offer less resistance to flow.
B) Have integral ports that allow pressure drop measurements.
C) Normally require special tools to open, preventing tampering by untrained personnel.
D) Have venturi jets that help offset the pressure loss through the valve.


A

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What will be an ideal response?

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Speed calculations are necessary to prevent ____________________.

Fill in the blank(s) with the appropriate word(s).

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Which switch is this?


a) single-pole switch
b) double-pole switch
c) three-way switch
d) triplex receptacle

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Name the material that is primarily an alloy of iron and 1.7% to 4.5% of carbon, with varying amounts of silicon, manganese, phosphorus, and sulfur.

What will be an ideal response?

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