Punches and Safe Maintenance Practices

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What is one of the purposes of using punches?

To mark positions in soft or thin work

To drive parts that cannot be hit directly with a hammer (correct)

To drive parts that can be hit directly with a hammer

To cut thick or hard material

Why is it important to keep the head of a punch free of burrs?

To lead to mushrooming of the punch shank

To prevent the punch from splitting or chipping (correct)

To improve the appearance of the punch

To make the punch easier to handle

What is the correct way to return a mushroomed punch shank to its original shape?

Using a bench grinder to shape the shank (correct)

Using a hammer to shape the shank

Using a file to shape the shank

Using a chisel to cut the shank

What is the purpose of a prick punch?

To transfer dimensions and locations onto sheet metal (D) Signup and view all the answers

Why should prick punches never be used to drive a pin or rivet from a hole?

Because they scar the material and have delicate points (A) Signup and view all the answers

What happens to a punch shank after it has been continuously hammered?

It deforms to a mushroom shape (A) Signup and view all the answers

What is the primary function of the teeth on a file?

To act as small chisels and remove small chips of material (B) Signup and view all the answers

What is the purpose of the tang on a file?

To act as a handle for the file (C) Signup and view all the answers

What is the main surface of a file where the teeth are cut?

The faces (B) Signup and view all the answers

Why is it important to use the correct file for the job?

Because there is a large range of types, shapes and sizes (A) Signup and view all the answers

What is the purpose of a safe edge on a file?

To permit a corner to be cleaned out without damage to adjacent faces (A) Signup and view all the answers

What is the material from which files are generally manufactured?

High-carbon steel (A) Signup and view all the answers

What is the primary function of lockwire pliers?

To twist and secure lockwire (C) Signup and view all the answers

How do you secure the lockwire after twisting it with lockwire pliers?

By cutting the wire and putting a 'pig tail' or curl on the end (C) Signup and view all the answers

Which type of pliers is commonly used for electrical and electronic work?

Needle nose pliers (C) Signup and view all the answers

What is the purpose of the spiral rod in the handle of lockwire pliers?

To twist the lockwire (A) Signup and view all the answers

What is the benefit of using needle nose pliers with long, thin jaws that are bent at a right angle to the handle?

They can grip a component and hold it while keeping your hand out of the way (B) Signup and view all the answers

What is the primary function of circlip pliers?

To fit and remove circlips (C) Signup and view all the answers

What is the main difference between a roughing process and a finishing process in file usage?

The amount of material removed (A) Signup and view all the answers

What determines the rate of cutting and the finish given to the work in a file?

The depth and spacing of the file's cutting teeth (B) Signup and view all the answers

What is the sequence of file grades from roughest to smoothest?

Rough, middle, bastard, second cut, smooth, dead smooth (C) Signup and view all the answers

What is the main difference between a single-cut file and a cross-cut or double-cut file?

The number of sets of teeth (A) Signup and view all the answers

What is the purpose of different arrangements of cutting teeth in files?

To give the most satisfactory results when working on different metals (D) Signup and view all the answers

What is the name of the file with curved teeth?

Dreadnaught (C) Signup and view all the answers

What is the primary purpose of the bastard cut grade of file?

To remove material quickly (B) Signup and view all the answers

What is the main difference between flat and parallel files?

The presence of one safe edge (D) Signup and view all the answers

What type of file is used for enlarging large, round holes and filing concave surfaces?

Half-round file (B) Signup and view all the answers

What is the characteristic of a smooth cut file?

Cuts slowly and imparts a good finish (C) Signup and view all the answers

What is the purpose of using a second cut grade of file?

To obtain a smoother finish than the bastard grade (D) Signup and view all the answers

What is the shape of the blade of a flat file?

Rectangular with tapered and bellied edges (B) Signup and view all the answers