What type of lines are used to remove unimportant portions of an object from a drawing so that it will fit into a specific space?
A. dimension line
B. phantom line
C. leader line
D. break lines
Answer: D
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When a zoned system uses a circulating pump for each individual zone, what other device is usually needed?
a. A boiler circulating pump b. A condensate pump c. Three-way valves d. A pressure-reducing valve
What is the least protective type of junction box that can be used in chemical plants?
a. Type 3R - Rainproof, Sleet Resistant b. Type 4X - Watertight, Corrosion Resistant c. Type 7 - Hazardous Locations, Class I d. Type 9 - Hazardous Locations, Class II
Higher-ordered living organisms are tremendously more complicated than machines governed by the laws of physics
Indicate whether the statement is true or false
If the frequency is 400 Hz in Figure 12-1, what is the inductance?
A) 25.1 mH B) 25.12 H C) 39.8 mH D) 39.8 H