390 Ag. Mechanics 2 / Unit 4.01 & 4.02

What device is used with a nut to fasten together two pieces of metal?

• bolt

• glue

• nail

• screw

For successful cutting in a plasma cutting system, what is imperative to remove from the compressed air?

• radon

• oxygen

• water vapor

• carbon dioxide

What type of fastener is used when the most strength is needed?

• machine bolt

• carriage bolt

• stove bolt

• toggle bolt

A cotter pin is used with a castle or slotted nut to:

• clean the threads.

• keep the nut tight.

• making self-tapping threads.

• make the nut easy to remove.

Fred is adjusting the arm guide rollers on a metal-cutting band saw to cut a 1/2" piece of metal. How far should he set them from the stock?

• always adjust at 3" from the stock

• as far as possible from the stock

• as close as possible to the stock

• avoid using on stock this thick

What is used to keep bolt nuts tight against a metal surface?

• lock washer

• linseed oil

• bolt

• nut

The fastener that needs a threaded hole in at least one of the pieces of metal being joined together is a:

• machine screw.

• flat washer.

• rivet.

• nail.

How should Joseph remove a hex socket head bolt?

• by oiling

• by hammering

• by using an Allen wrench

• by using a combination wrench

In using a plasma cutting torch, which should Charles have in place on the torch to protect the electrode?

• kerf

• shield

• swirl ring

• torch valve

Which type of electricity is required for a plasma cutting system?

• AC

• CC

• DC

• MC