EXERCISE NO. 4 - HAND TOOLS - PUNCHES, CHISELS, HACKSAWS
NAME: Mark out of 50 Marks:
1. Match the best tool for the task below:
Prick punches Centre punches Taper drift punches Pin punches
a. To start driving out tight parallel pins, use ..................................................
b. To drive out loosened taper pins, use ...................................................
c. To provide witness marks to locate the pivot points of dividers, use. ..................................................
d. To locate centre positions that make it easier to drill accurately, use ..................................................
2. Choose the hacksaw blades best suited for the tasks a-e below:
Low tungsten steel flexible blades with pitches as follows: (a) 24 TPI
(b) 18 TPI
(c) 14 TPI
High speed steel all hard blades with pitches as follows: (d) 32 TPI
(e) 24 TPI
(f) 18 TPI
(g) 14 TPI
a. To cut accurate lengths from a length of 19 mm diameter alloy steel, use ....................
b. To cut accurate lengths from a length of 16 mm diameter mild steel, use .....................
c. To cut the. ends off 10 mm brass bolts in an awkward position, use ............................
d. To cut accurate lengths from 25 mm diameter thin‑wall steel tubes, use
e. To cut a strip off the edge of a sheet of 3 mm thick aluminium, use ...............................
3. Select the chisel best suited for the tasks a-d.
(a) Flat chisel (b) Side cutting chisel (c) Diamond point chisel
(d) Cross cut chisel (e) Round nose chisel
a. To draw over a drill point that has begun to cut off centre, use .......................
b. To cut out the length of a narrow groove, use ............................................
c. To cut a piece out of a thin metal template, use ................................................
d. To chip out a weld that has cracked, use .........................................................
4. Match the letter with the correct tool.
| 1. |
half round scraper |
( ) |
11. |
adjustable depth gauge |
( ) |
|
| 2. |
rule |
( ) |
12. |
hand tap |
( ) |
|
| 3. |
flat file |
( ) |
13. |
engineer’s square |
( ) |
|
| 4. |
half round file |
( ) |
14. |
combination set |
( ) |
|
| 5. |
measuring tape |
( ) |
15. |
centre square |
( ) |
|
| 6. |
scriber |
( ) |
16. |
hacksaw |
( ) |
|
| 7. |
flat chisel |
( ) |
17. |
button die |
( ) |
|
| 8. |
trammels |
( ) |
18. |
twist drill |
( ) |
|
| 9. |
centre punch |
( ) |
19. |
jenny callipers |
( ) |
|
| 10. |
ball peen hammer |
( ) |
20. |
dividers |
( ) |
5 List the four marking mediums usually used to coat the surface of a job before marking off.
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6 While marking off a job, what three things should be checked?
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7 Use simple sketches to show two uses for jenny callipers.
8 What are trammels used for?
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9 Use an arrow to show which direction the teeth should face on this hacksaw frame.
10 When using a hacksaw to cut thin material why would a fine pitch blade be used instead of a coarse pitched blade?
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11 When it is necessary to cut and file to a line marked on a work piece, what can be done during marking out to ensure that the position of the line will be known even if is wiped off during the cutting?
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12 State the term given to the shape of the head of this cold chisel and list two reasons why it is dangerous.
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13 Show on the sketch how the hole being tapped can be checked to see it if is square to the surface of the job.