Slash marks through the circuit lines are used to indicate the number of ___________.
A. electical lines
B. conductors
C. ground wires
D. exposed wires
Answer: B
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An example of an older form of wiring is ____.
a. knob-and-tube b. knob-and-cylinder c. button-and-tube d. button-and-cylinder
Compared with canals, railroads
A. were more expensive than canals to construct. B. transported freight more slowly. C. faced much less political opposition by vested economic interests. D. required less technological obstacles to overcome to construct and operate them safely. E. could be built almost anywhere with sufficient financial capital.
Temporary bracing for trusses should be no less than 2 ? 4 lumber, with a minimum length of ____ feet.
a.8 b.16 c.24 d.36
A round split adjustable die is expanded and contracted by:
A) Nut B) Die adjuster C) Screw D) Tapered wedges