15) The cutting edge of a flat cold chisel is slightly convexed so that:

less power is required in cutting a metal and its edge doesn't fasten in the job

metal can be cut easily

chipping can be done in a straight line

its edge will not break during chipping

Answer is:

less power is required in cutting a metal and its edge doesn't fasten in the job

high carbon steel

high speed steel

cast steel

tungsten steel

Answer is:

to reduce friction during cutting a metal

nothing

to give a beautiful shape to it

to help in cutting the jobs having more width and depth

Answer is:

between the inner ends of the two pin-holes

between the outer ends of the two pin-holes

between centres of the two pin-holes

between the inner end of pin-hole and the outer end of the other pin-hole

Answer is:

cast iron

cast steel or special tool steel

mild steel

nickel steel

Answer is: