APPENDIX 
431 
(8) y/20164 = 
(9) Sketch each of these:— 
(a) Square 
(b) Rectangle 
(c) Hexagon 
(d) Pentagon 
(e) Semicircle 
(f) Ellipse 
(g) Right angle triangle 
(10) Find the circumference of a wheel which is 5" in diameter. 
(11) Multiply 7X 3/16: 3/4 X 5/8: 3 1/4X2 1/2: 
(12) What would be the cost of eight 1/2" X 5" machine bolts 
at 1 5/8 cents each? 
(13) Change 7/32 to a decimal. 
(14) Change .3125 to a fraction. 
(15) Give the area in square feet of a room 15' X 25'. 
48. Trade Questions for Machinists 
1. How many ways do you know for turning a taper? 
2. Name five types of work which can be done on a universal 
miller. 
3. What machines and tools would you use for surfacing a 
flat cast iron plate 16" x 25^ x 2"? 
4. What is the most important thing to look after before 
starting the feed on a cylindrical grinder? 
5. What causes a drill to cut larger than its diameter? 
6. How should a lathe tool for use on brass differ from one for 
use on steel? 
7. What type of machine do you consider capable of the 
greatest variety of work ? 
8. Which would you run at the greater R. P. M., a slotting 
saw 5" diameter or an end mill 1 $4" diameter? 
9. What will be the result of leaving chalk on a steel or iron 
surface? 
10. How much stock is usually left for reaming?