One sure-fire way to determine if the system is operating with less than a full charge of refrigerant is to evaluate the ____.

A. cooling thermostat setting
B. evaporator superheat
C. nitrogen pressure
D. defrost timer


Answer: D

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This is the screw thread dimension from crest to crest through the axis.

a. pitch b. thread form c. minor diameter d. major diameter

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When a tractor sliding 5th wheel is inappropriately placed, which of the following can result?

A. weight-over-axle infractions B. unbalanced bridge formula C. uncomfortable ride D. all of the above

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The dimensions of a square duct with a grooved seam are:  side = 8 inches; length = 2 1/2 feet; M = 1/8 inch.  Find in inches the value of W.S.

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

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The wireframe method of modeling is the most time-consuming computationally.

Answer the following statement true (T) or false (F)

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