Read the General Instructions on p. 102.
Answer briefly any three, but not more than three, of the following
questions, and draw two, but not more than two, of the examples.
_Questions._
(_a._) Give sketches showing how the separate lengths of a line of
shafting may be connected together. (8.)
(_b._) What is the object of using chipping or facing strips in
fitting up machine parts? Give one or two examples. (8.)
(_c._) Give sketches showing how you would grip and drive a round
iron bar for the purpose of turning it between the centres of a
lathe. (10.)
(_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.)
_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.
_Note._--As the radius of the wheel is too large for your
instruments, the circumference at the joint may be set out
straight, as in a rack. (35.)
[Illustration: FIGS. 86 AND 87.]
[Illustration: FIG. 88.]