In some applications of truck refrigeration, a liquid refrigerant is sprayed directly into the truck box to maintain low temperatures. The liquid refrigerant used is ____.
A. oxygen
B. nitrogen
C. R22
D. ammonia
Answer: B
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Whatever the shape of the detail and regardless of the number or positions of views, the hidden detail is represented by a hidden edge or a(n) ____.
A. obscured edge line B. recessed edge line C. hidden edge line D. invisible edge line
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Find v? in the op amp circuit of Fig. 5.92.
 FIGURE 1.png)
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The depth of an object shown in a multiview print is common between ____.
A. the front view and the top view B. the front view and the right side view C. the top view and the right side view D. the rear view and the left side view E. the rear view and the bottom view
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The welding process that uses a consumable wire is _____
a. GTAW b. TIG c.GMAW d. SMAW
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