In spot welding, the spacing between two spot weld should not be less than _______________?

A. both forward and return strokes
B. forward stroke
C. return stroke
D. none of these

A. 15 mm/m
B. 20 mm/m
C. 26 mm/m
D. 10 mm/m

A. below the recrystallisation temperature
B. at the recrystallisation temperature
C. at any temperature
D. above the recrystallisation temperature

A. squeezing
B. coining
C. planishing
D. drawing

A. more volume of acetylene and less volume of oxygen
B. equal volumes of oxygen and acetylene
C. more volume of oxygen and less volume of acetylene
D. none of the above

A. progressive die
B. simple die
C. compound die
D. combination die