- (a) Make a freehand working drawing of a flask used for a
bench moulding in the foundry; (b) describe same flask. - (a)
Show by section sketch a mould of a plate 12" long, 6" wide, 1"
thick with gate and vents; (b) construct the mould. - Make a
perspective sketch of a pulley pattern 6" diameter, 2" face, the
center to be cored 2" by use of core prints. - Construct a wood
pattern and core box as per the sketch outlined in Requirement
3; use shrinkage rule for the metal used, gray iron, bronze or
brass. Change measurements to allow for finish all over casting
and proper draft for removing pattern from mould. - Describe how
the cupola operates. - (a) Describe a process for cleaning one
of the above castings when removed from the mould; (b) clean one
of the above castings. - Describe the properties in sand that
are best suited for foundry use and tell how to prepare sand for
use. - Tell what important safety precautions should be taken to
protect the workers in a foundry - by the employer - by the
employee. Not