(d.) Explain the action of the governor shown in Example 1 (fig. 86). (10.)
(e.) Describe in detail how the mud-hole door in Example 2 (fig. 88) is removed for the purpose of cleaning the boiler and how it is replaced and the joint made steam-tight. (10.)
(f.) Describe how the parts of the spur wheel in Example 3 (fig. 87) are put together, and explain why the wheel is made in segments. (10.)
Fig. 88.
Examples to be drawn.
1. Loaded governor for small gas engine. Draw and complete the two views, partly in section as shown (fig. 86). Scale full size. (35.)
2. Mud-hole mouth-piece for Lancashire boiler. Draw and complete the two views shown (fig. 88). Scale 3⁄8ths. (35.)
3. Point for segments of large spur wheel. Draw and complete the views shown (fig. 87). Scale 3⁄16ths.