____ is the dimension from root to root through the axis on an external thread and measured across the crests through the center for an internal thread.
A. Minor diameter
B. Pitch diameter
C. Major diameter
D. Chamfer angle
E. none of the above
Answer: A
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A. ?press fitting B. ?snap fitting C. ?shrink fitting D. ?transfer fitting
In a wastewater system, the water entering the condenser is 85°F and the water leaving the condenser is 105°F. Which of the following statements is a logical explanation for the above conditions?
A. reduced water flow through the condenser B. scale buildup in the water circuit C. excess water flow through the condenser D. both a and b
Acetylene should never be used:
A) Above 15 psi. B) Below 20 psi. C) Above 20 psi. D) Below 15 psi.
When the water and refrigerant in a heat exchanger flow in opposite directions, it is referred to as ____.
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