Answer:

Answer:1. Electric fans have a motor that moves blades that are attached to a central rotating hub. Other common power sources for fans include internal-combustion engines and steam or gas turbines. Fans circulate air to cool and ventilate rooms and to control humidity.

Answer:1. Electric fans have a motor that moves blades that are attached to a central rotating hub. Other common power sources for fans include internal-combustion engines and steam or gas turbines. Fans circulate air to cool and ventilate rooms and to control humidity.2. Technical drawing is essential for communicating ideas in industry and engineering. To make the drawings easier to understand, people use familiar symbols, perspectives, units of measurement, notation systems, visual styles, and page layout.

Answer:1. Electric fans have a motor that moves blades that are attached to a central rotating hub. Other common power sources for fans include internal-combustion engines and steam or gas turbines. Fans circulate air to cool and ventilate rooms and to control humidity.2. Technical drawing is essential for communicating ideas in industry and engineering. To make the drawings easier to understand, people use familiar symbols, perspectives, units of measurement, notation systems, visual styles, and page layout.3.Technical drawing is essential for communicating ideas in industry and engineering. To make the drawings easier to understand, people use familiar symbols, perspectives, units of measurement, notation systems, visual styles, and page layout. ... Technical drawings are understood to have one intended meaning.