MD 9 Eng.Mat. 3 Pt.4

Copper Is annealed by heating to a cherry red color and ____.

• dousing in cold water

• dousing in oil

• cooling slowly in air

• dousing in hot water

What is the approximate melting point of Babbit?

• 100 def. F.

• 750 def. F.

• 650 def. F.

• 500 def. F.

At what temperature where soft solder approximately metls?

• 250 deg. C

• 450 deg. C

• 350 deg. C

• 550 deg. C

How do you call the process used to retard corrosion (rust) on iron pipe and fitting?

• tinning

• galvanizing

• soldering

• sulphurizing

Copper is annealed by heating to a cherry red color and ___.

• dousing in cold water

• dousing in oil

• cooling slowly in air

• dousing in hot water

What is the main purpose of ''annealing`` a metal?

• to make the metal harder

• to make the metal softer

• to make the metal harder medium-hard

• to make the metal harder shiny

The purpose of ''tempering`` is to make a metal what?

• harder

• less brittle

• softer

• more brittle

A specific method of zinc galvanizing in which parts are tumbled in zinc dust at high temperatures.

• sheradizing

• super finishing

• polishing

• pickling

A hot-dip or electroplate application of tin to steel.

• tin-plating

• metal spraying

• organic finishes

• lapping

This process is known as bonderizing when used as a primer for paints.

• parkerizing

• honing

• hard surfacing

• galvanizing