15. What is the basic unit of length in Metric system of measurement? a. Meter b. millimeter b. decimeter
16. What is the function of a Protractor? d. centimeter a. Used for measuring and laying off angles that can't be drawn with the triangle or combination of triangles b. This drafting tool is used for measuring and preparing scale drawings such as blueprints and maps. C. Designed to increase speed and accuracy when drawing circles, symbols, etc. d. Used for drawing circles and arcs.
17. To convert a fraction to a decimal is a. Look in a metric conversion chart b. Divide the numerator (top number) by the denominator (bottom number) Check the engineerls scale d. All of the above
18. It is a process of making accurate drawings using special drawing tools and instruments. b. mechanical drafting a. Isometric drawing c. oblique drawing perspective view
19. It is a commonly used triangle in drafting. b. 45 degrees x 45 degrees c. a &b d. None of the above a. 30 degrees x 60 degrees​