Simple, symmetrical (SYMM) flat objects and symmetrical cylindrical parts, such as sleeves, shafts, rods, or studs, require ____ view(s) to show the full details of construction.

A. one
B. two
C. three
D. auxiliary


Answer: B

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Matter cannot be created or destroyed, but it can and does change form. This statement is known as:

A) The second law of thermodynamics. B) Dalton's law of matter and energy. C) Charles' law of kinetic energy. D) The law of conservation of matter.

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In which of these situations is it necessary to use outdoor air for combustion on an induced-draft furnace?

A) It is always necessary. B) In locations where the outdoor temperature does not fall below 32°F. C) When the furnace is within 50? of a living space. D) When there are chemicals near the furnace

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____________________ is a dry powder of burned limestone and clay

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

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An SCR remains on after it is triggered until the ____________________ current drops below a certain level.

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

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