Workshop Technology
For gas welding, the pressure desired at the welding torch for oxygen is

7 to 103 kN/m²
70 to 280 kN/m²
280 to 560 kN/m²
560 to 840 kN/m²

ANSWER DOWNLOAD EXAMIANS APP

Workshop Technology
Sand wash is a casting defect which

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
Occurs as sand patches on the upper surface of a casting
Results in general enlargement of the casting

ANSWER DOWNLOAD EXAMIANS APP