Cold Chisel Materials and Cutting Action

What is the purpose of a flat chisel?

Cutting off rivet heads

Chipping flat surfaces, trimming castings and forging, and cutting thin metal (correct)

Cutting angles of 700 or more

Chiseling in positions inaccessible to a flat chisel

What is the effect of a cutting angle that is too large?

The metal will build up in front and the chip will not curl off (correct)

The chisel will require more frequent sharpening

The chip will curl off due to the loss of wedging action

The chisel will dig into the metal even with the minimum angle of relief

What is the purpose of a side cutting chisel?

Trimming castings and forging

Cutting off rivet heads

Chiseling in positions inaccessible to a flat chisel (correct)

Chipping flat surfaces

What is the preferred cutting edge for most work in a flat chisel?

Slightly convex Signup and view all the answers

What is the effect of a cutting angle that is too small?

The chisel tends to dig into the metal even with the minimum angle of relief Signup and view all the answers

What is the typical cutting angle of a flat chisel?

60° Signup and view all the answers

What is the purpose of draw filing?

To produce a good appearance by removing scratches and leaving an even-grained finish Signup and view all the answers

What is pinning of files?

When metal particles become embedded in the file teeth Signup and view all the answers

What is the effect of pinning on the file?

Causes deep scratches and reduces the efficiency of the file Signup and view all the answers

Why does pinning tend to occur when filing soft metals?

Because soft metals chips cannot clear easily Signup and view all the answers

How can pinning be reduced?

By relying on frequent cleaning to remove pins and dirt Signup and view all the answers

What happens when a file is not cleaned often?

It acts like a dull file Signup and view all the answers

How should the drill be laid down when not in use?

Gently in a secure resting place Signup and view all the answers

What should be checked before using an electric drill?

The condition of the drill, including the power lead and casing Signup and view all the answers

Why is it essential to use a three-pin plug with an electric drill?

To ensure the earth return lead is securely connected Signup and view all the answers

What should you do if the drill's insulation is damaged?

Report the damage and do not use the drill Signup and view all the answers

How should the drill be gripped and held?

Firmly, with both hands Signup and view all the answers

What is a safety precaution to be taken while chiselling?

Using goggles and chipping screen Signup and view all the answers

What is the purpose of a rough grinding wheel in chiselling?

To remove the 'mushroom head' of the chisel Signup and view all the answers

What should you do at the break-through point when using an electric drill?

Apply very light pressure to ensure a clean break-through Signup and view all the answers

What is the characteristic of double cut files?

They have teeth formed by a double set of parallel chisel cuts that cross each other diagonally Signup and view all the answers

What is the purpose of filing?

Either to alter the size and shape of a part by removing considerable material or to smooth a surface without removing much material Signup and view all the answers

What is the most commonly used type of file?

Flat file Signup and view all the answers

What is the characteristic of single cut files?

They have teeth formed by a single set of parallel chisel cuts Signup and view all the answers

What should be done if there is doubt about the internal condition of a drill?

Return it to the electrical shop for a complete electrical test Signup and view all the answers

What is a common safety advantage of pneumatic drills?

They are driven by air pressure, making them safer Signup and view all the answers

What is a potential fault in a pneumatic drill?

A split or chafed air-line Signup and view all the answers

What is an important consideration when selecting a drilling machine?

The size of the drill and the dimension of the job to be drilled Signup and view all the answers

What is a characteristic of a bench drilling machine?

It usually has a capacity of 13mm or less Signup and view all the answers

What is a typical feature of the feed mechanism in a bench drilling machine?

Manual with hand feed Signup and view all the answers