Workshop Technology
If an aluminium pattern made from a wooden master pattern is to be used for grey iron castings, then the shrinkage allowance allowed on the wooden pattern should be

10 mm/m
16 mm/m
20 mm/m
26 mm/m

ANSWER DOWNLOAD EXAMIANS APP

Workshop Technology
Piercing is an operation of cutting

A hole (other than cylindrical) in a sheet of metal by the punch and the die
A cylindrical hole in a sheet of metal by the punch and the die
A number of holes evenly spaced in a regular pattern on a sheet of metal
A flat sheet to the desired shape

ANSWER DOWNLOAD EXAMIANS APP

Workshop Technology
Sand wash is a casting defect which

Occurs as sand patches on the upper surface of a casting
Results in a mismatching of the top and bottom parts of a casting
Occurs near the ingates as rough lumps on the surface of a casting
Results in general enlargement of the casting

ANSWER DOWNLOAD EXAMIANS APP