Hand Tools And Bench Work

Question 1

What are the two categories of machine tool trade?

Answer 1

The two categories are:
* Machine tool operations
* and hand tools

Question 2

What are operations are included in benchwork?

Answer 2

Benchwork includes operations of:
* Laying out
* Fitting
* and assembling

Question 3

What are the two classes of hand tools?

Answer 3

The two classes of hand tool are:
* Cutting
* and non-cutting

Question 4

What are non-cutting hand tools used for?

Answer 4

Non-cutting hand tools are used for holding, assembling or dismantling parts.

Question 5

What are some examples of non-cutting hand tools?

Answer 5

Some examples of non-cutting hand tools are:
* Vices
* Screwdrivers
* Hammers
* Wrenches
* Pliers

Question 6

What are cutting hand tools used for?

Answer 6

A cutting tool is a wedge-shaped, sharp-edged tool used to remove excess layers of material from a workpiece by cutting during machining to obtain the desired shape, size, and accuracy.

Question 7

What are some examples of cutting hand tools?

Answer 7

Some examples of non-cutting hand tools are:
* Hacksaw
* Files
* Drills
* Reamer
* Fly-cutter

Question 8

What is a bench vice and what is it used for?

Answer 8

A bench vice features two parallel jaws used to secure a small object securely for sawing, chipping, filing, polishing, drilling, reaming and tapping.

Some vices have a swivel base or solid base.

Question 9

What is used to protect the workpiece in the vice?

Answer 9

Jaw caps made of brass, aluminium or copper are used to prtect the worpiece from being marred or damaged

Question 10

What determines the size of a vice?

Answer 10

The size of a vice is determined by the width of the jaws

Question 11

What is a ball-peen hammer and what is it used for?

Answer 11

A ball-peen or the machinist’s hammer, is a type of peening hammer used in metalworking. It has two heads, one flat and the other, called the peen which rounded. It is used in rivetting, bending and peening operations.

Question 12

What sizes does the ball-peen hammer come in and what are they used for.

Answer 12

The ball pein hammer comes in sizes from a head mass of 2oz to 3oz. Smaller sizes are used for layout work and largers sizes are used for general work.

Question 13

What precautions must be taken when using a hammer?

Answer 13

When using a hammer you should ensure that:
* The handle is solid and not cracked
* The head is tight on the handle and secured with proper wedge to keep expanded in the head
* The handle or your hands are not greasy
* To NEVER strike two hammer heads together

Question 14

What is a Phillips screwdriver?

Answer 14

A Phillips screwdriver has a + shaped tip for use wih Phillips-type recessed screw heads.

A recessed head has a special indentation centered in its top surface.

Question 15

What sizes can a Phillips-screwdriver be found in?

Answer 15

The Phillips-screwdriver can be found in the sizes:
* #1
* #2
* #3
* #4

These are to suit the various–sized recesses in heads of fasteners.

Question 16

What precautions must be taken when using a Phillips-screwdriver?

Answer 16

When using a Phillips-screwdriver you should ensure that:
* You are using the correct screwdriver size for the fastener being worked on
* The screwdriver is held firmly in recess and square with screw.

Question 17

How do you regrind a standard screwdriver blade?

Answer 17

• Make the sides of the blade slightly concave by holding side of blade tangential to the periphery of the grinding wheel. Ensure to grind an equal amount of material off of each side of the blade.
• The concave shae will allow the blade to maintain a better grip in the slot.
• Ensure to maintain the original taper, width and thickness of the tip and grind the end square with the centreline.
• Ensure to remove as little of the metal as possible.
• Ensure to quench the tip frequently in cold water.

Question 18

What are the two types of open-ended wrenches?

Answer 18

The two types of double-ended wrenches are:
* Double-ended
* Single-ended

Question 19

What is an open-ended wrench?

Answer 19

An open-ended wrench has flat jaws offset at an angle of 15 degrees which slide around nuts or bolt heads and levered for loosening or tightening.

Question 20

Why are open-ended wrenches offset 15 degrees?

Answer 20

The wrench is offset 15 degress to allow the user to turn the nut or bolt in tight quarters by “flopping” the wrench.

Flopping is turning the wrench over so the other face is down each turn.

Question 21

What is a double-ended wrench?

Answer 21

A double-ended wrench has an opening on each of the head.

Question 22

What is a socket wrench and what is it used for?

Answer 22

A socket wrench or ratchet uses a reversible ratcheting mechanism which allows the user to pivot the tool back and forth to turn its socket instead of removing and repositioning a wrench to do so.

Question 23

What are the two types of drives of socket wrenches?

Answer 23

The two types of drives of socket wrenches are:
* Ratchet
* Torque-wrench handles

Question 24

What is a torque-wrench handle used for?

Answer 24

A torque-wrench handle is used when nuts or bolts must be tightened within certaain limits.

Question 25

What is another word for an allen setscrew wrench?

Answer 25

Another word for an allen setscrew wrench is a hex key

Question 26

Describe a hex key

Answer 26

A hex key is hexagonal and fit into the recesses of socket head setscrews and made of tool steel

Question 27

What sizes are hex keys available in?

Answer 27

The size of a hex keys is measured as the distance across the flats of the wrench.

1/2 diameter outside of Allen setscrew in which it is used

Question 28

What are some steps that should be taken when using a wrench?

Answer 28

• Always select a wrench that fits the nut or bolt properly
• Always pull the wrech, DO NOT pull the wench
• Ensure that the nut is fully seated in the wrench jaw
• Use the wrench in the same plane as the nut or bolt head
• When tightening or loosening nut, give it sharp quick jerks as they are more effectie than steady pulls
• Lubricate the threads with a dro of oil onthreads when assembling bolt and nut to ensure easy removal if neccessary

Question 29

What are the two types of pliers?

Answer 29

The two types of pliers are:
* Combination or slip-joint
* Side-cutting
* Vice-grip

Question 30

What is a combination pliers and what is it used for?

Answer 30

A combination pliers is adjustable to grip both large and small work. It is used to grip workpieces when small holes must be drilled or when bending or twisting light, thin materials

Question 31

What are side-cutting pliers and what are they used for?

Answer 31

Diagonal pliers have a plane defined by the cutting edges of the jaws which intersects at the joint rivet at an angle. They are used mainly in electrical, communications and construction work to grip, splice or cut wires, and strip insulation and bend wires of small diameters (1/8 in. or less)

Question 32

What are vice-grip pliers and what are they used for?

Answer 32

Vice-grip pliers have extremely high gripping powers due to the ajustable lever action produced by a screw in the handle that allows adjustements to various sizes.

Question 33

What are the styles of vice-grip pliers?

Answer 33

There several different styles of vice-grip pliers are:
* Standard jaws
* Needle jaws
* C-clamp jaws