3-18. To indicate that a hidden line lies below another hidden line, how should you draw the lowermost hidden line? 1. Break the uppermost hidden line by the lowermost hidden line 2. Break the lowermost hidden line by the uppermost hidden line 3. Allow the two hidden lines to intersect 4. Break both hidden lines at the point of intersection 3-19. How much of a gap should you leave between the object outline and an extension line? 1. 1/16" 2. 1/8" 3. 3/16" 4. 1/4" 3-20. How far beyond the last dimension line should extension lines project? 1. 1/16" 2. 1/8" 3. 3/16" 4. 1/4" 3-21. What is the minimum allowable distance between an object outline and the first dimension  line? 1. 1/4" 2. 1/8" 3. 3/8" 4. 3/16" 3-22. What is the minimum allowable distance between dimension lines? 1. 1/8" 2. 1/4" 3. 3/16" 4. 3/8" 3-23. How should you depict multiple parallel dimensions? 1. Staggered 2. Vertically  centered 3. Aligned flush left 4. Aligned flush right 3-24. How many times the width of an arrowhead should you draw the length of the arrowhead? 1. 1 2. 2 3. 3 4. 4 3-25. When carelessly drawn and varied in size, which of the following lines causes the drawing to look unprofessional? 1. Arrowheads 2. Dimension lines 3. Hidden lines 4. Centerlines 3-26. Which of the following information does leader lines terminating with a dot indicate? 1. The note refers to nonessential information 2. The leader line refers to non- dimensional information 3. The note applies to the object outline 4. The note applies to the object surface 3-27. You should use a long break line when drawing which of the following objects‘? 1. An allen wrench 2. A slot-head screwdriver 3. A broom or rake handle 4. A test tube 15