Metalwork - Exam Papers - HL - Paper - 1993
1. Answer Question 1, Sections A and B and three
2. All answers must be written in ink on the answer book supplied.
Diagrams should be drawn in pencil.
3. Squared paper is supplied for diagrams as required.
4. Please label and number carefully each question attempted.
SECTION A - 20 MARKS
Answer any five questions
|(a) Describe briefly, any contribution made
by an Irish man or woman to Technology.
(b) The diagram on the right shows part of
a modern car engine. Name three of the parts A. B.
C. D and E.
(c) What is the purpose of the grooves and
rings in part A ?
(d) Explain the function of the shaft G.
(e) With the aid of a sketch, show how shaft
G could be driven without slip by shaft E.
(f) An Electric Soldering Iron has the following
speed specification :- 25W - 220V - AC. Explain the
meaning of: 25W, 220V and AC.
(g) What is meant by the term "tapping size
(h) Examine the electronic circuit shown.
Name two components and slate the function of each.
SECTION B - 20 MARKS
Answer any five questions
The illustration shows an Electric Bell.
(a) Explain how the bell operates.
(b) Name a material which could be used
to make part A.
(c) Describe how Part A is made.
(d) What material property is required
for Part B ?
(e) Explain the purpose of the cores.
(f) The base can be made from either 6
mm Acrylic or 12 mm Hardwood. Select one of these
materials for the base and
- name the tools necessary to make the base
- describe, using sketches, how the semi-circle
is formed to shape.
(a) Starting with the words "Design Brief",
list any three other stages in the design
(b) A sign for Bed and Breakfast which is
to be hung from a limber post is shown opposite.
You are to design a decorative bracket which
will hold the sign and allow it to be attached
to the post in the position shown.
Your design should :-
- Show clearly how the sign is attached
to the bracket.
- Show how the bracket is attached to
|Rough sketches to illustrate your ideas and
possible solutions should first be made in
your answerbook. Select the most appropriate
final solution and make a working drawing
(elevation only) of your design on the squared
|(a) Name the furnace illustrated on the
(b) List the materials used in the charge.
(c) Explain how the furnace is charged.
(d) What is the function of part F ?
(e) What is the function of parts C ?
(f) State the materials taken away in
the rail cars D and E. Give one use of each
of these substances.
(g) What type of lining is used in this
|A Cement Mixer is shown in the illustration
on the right.
(a) The large ring gear A is attached to
the drum. It rotates at 50 rev / min and
is driven by a small pinion gear wheel B.
If the ring gear has 150 teeth and the pinion
gear has 10 teeth, what is the gear ration
(b) At what speed does the small pinion
gear wheel B rotate ?
(c) Name two methods of powering the mixer
and state one advantage for each method.
(d) With the aid of a sketch, describe
how the mixer shown could be modified so
that it might be towed slowly by a car.
(e) What is the function of wheel C ?
- Name three of the parts of the micrometer
- Explain the function of part A.
- What precautions should be observed
both before and after using a micrometer
- What is the reading of the 0-25 mm
micrometer shown ?
- What are "Vee" blocks ? Why are they
usually supplied in pairs ?
- Show by means of a sketch how round
material is held in position on a Vee block
during the drilling operation.
A or SECTION B but not both.
Parts for a Locking Device for a
bicycle are shown opposite.
(a) Part 1 is made from 12 mm diameter alloy steel. Calculate the length
of material required to make this part.
(b) Show, by means of a diagram, how the
slot A in Part 2 is formed.
(c) Explain how the device is assembled.
(d) On squared paper, draw a front elevation
of the assembled Locking Device. Insert
three dimensions on your drawing.
(e) Explain, with the aid of a sketch,
how the semi-circle is formed in Part 1.
(a) In CNC / CAM, explain the importance
of testing the programme before machining
the component. (Test Run)
(b) Describe how an item is selected from
an on-screen menu in either a CAD or a CNC
(c) Name two ways in which information
can be stored in a computer.
(d) What is the unit of Computer Memory
(e) Answer one of the following: -
- For what do the letters DOS stand
- What is meant by the term Tool
- Give one example of a code used
in CNC and give its meaning.
(f) An alloy steel bar of diameter 30 mm
is to be machined on a CNC lathe. Calculate
the approximate spindle speed in rev / min
for the lathe if the surface cutting speed
of the alloy is 60 metres per minute.