What does an alloy of tin and copper make, an alloy of zinc and copper?

What does an alloy of tin and copper make, an alloy of zinc and copper?
 
  A) Bronze and brass
  B) High temperature solder and galvanizing compound
  C) Brass and bronze
  D) Bronze and die cast

 Q. 2

The dead center needs to be frequently adjusted between cuts because the:
 
  A) Heat from machining expands the work and tightens it
  B) Machine adjustments often vibrate loose during machining operations, so that frequent attention is necessary
  C) Lubricating oil runs out
  D) Metal in the workpiece center wears and causes the centers to become loose

 Q. 3

Galvanizing and plating are familiar uses of zinc, lead and tin. On what base material are these metals plated and what do they resist?
 
  A) On pipe joints to resist leaking B) On babbitt bearings to resist wear
  C) On steel to resist corrosion D) On die castings to resist deformation