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Metalwork - Exam Papers - HL - Paper - 1995
INSTRUCTIONS
1. Answer Question 1, Sections A and B and three
other questions.
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
COMPULSORY
Answer any five questions
(a) Describe briefly, the contribution made
to technology by one of the following :-
Henry
Ford;
William Parsons;
and Fr. Nicholas Callan.
(b) The illustration shows parts of a single
cylinder engine. Identify any four of the
parts A, B, C, D, E and F.
(c) Explain the purpose of shaft F.
(d) With the aid of a sketch, describe another
drive method which could be used instead of the two
gear wheels H.
(e) List three metalworking processes
which require the use of safety visors or goggles.
(f) Explain the following :
- the pitch of a screw thread;
- the set of a hacksaw blade.
(g) Name and match any two of the
symbols 1, 2, 3 and 4 with two of the components A, B, C and D. |
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SECTION B - 20 MARKS
COMPULSORY
Answer any five questions
The diagram shows an electro-magnetic braking mechanism.
(a) If part A is rotating, describe
how the mechanism is used to slow it down.
(b) Name any three of the parts: C, D, E, F and G.
(c) Draw a cross-sectional view of part B and explain us construction.
(d) Name a material suitable for part L and state one property of this material.
(e) With the aid of a sketch, explain how
parts H and S are used to adjust the
mechanism. |
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WARNING : Don't forget to return
this section with your answer book (if question
2 is attempted) or otherwise marks will be
lost. |
(a) Name four stages in the
design process.
(b) The flower basket shown is to
he fixed to the wall of a house. Design a
decorative bracket which can be mounted on
the wall and used to hang the basket. Your
design should incorporate:
- a means of fixing the bracket to the
wall;
- the removal of the basket from the
bracket.
Rough sketches to illustrate your
ideas should be drawn in your answer book.
Select a final solution and make a working
drawing of the bracket (elevation and end
view) on the squared paper below.
(c) Show by means of a sketch how
part A of the basket may be made in
the metalwork room.
(d) Since the bracket is to be used
outdoors, explain how corrosion of the parts
may be prevented. |
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An illustration of a modern motorcycle is shown
opposite. Answer any five questions.
(a) Name and state the materials used in
the manufacture of parts A, B and C.
(b) State one property of each of
the materials listed.
(c) What is meant by the term "pneumatics"
?
(d) State the function of the part shown
in Fig. X and give a brief description of
how it works.
(e) Describe briefly one of the following
processes:
- plastic dip-coating or
- enamelling.
(f) What damaging effect does the use of
engines have on the environment ? |
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(a)
- Identify the type of furnace shown
opposite.
- What kind of metal is produced by
this furnace ?
- What materials are used to charge
the furnace ?
- Name the gas that is blown into the
furnace through part B.
- Explain the part played by the named
gas in the metal production process.
(b)
- Name two alloys which may be
made from the list of elements in the table
opposite. Name the elements used to make
each of these two alloys.
- Describe one use for each
of the alloys you have chosen.
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Aluminium
Zinc
Iron
Silicon |
Tin
Carbon
Lead
Copper |
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A bench-type drilling machine is shown
opposite.
(a) Name the pans A, B, C and D.
(b) Name the item of equipment that
is generally attached to Part D when
the drilling machine is in use in the classroom.
(c) Show by means of a sketch how
this piece of equipment is secured to Part D.
(d) Describe, with the aid of a
sketch, how Part B actually moves
Part A.
(e) Explain what is a
- countersunk hole,
- counterbored hole.
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The scriber shown in the diagram is lo
he made in a metalwork classroom.
(a)
- Suggest a suitable type of steel
for the scriber.
- Explain how the steel should be
softened before it is shaped.
- Describe how the scriber is hardened
and tempered. State which of the parts A, B and C require
this treatment.
- At what angle should the point
be ground on section A.
(b) Explain any three of
the following terms
- Brittleness
- Ductility
- Conductivity
- Tensile Strength
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(a) The diagram shows a machined part
with diameters :
Ø10mm x 16mm long ;
Ø14 mm x 16 mm long ;
Ø22 mm x 35 mm long.
Make a drawing of this part and dimension
it using either :
- absolute dimensioning or
- incremental dimensioning.
Name the system of dimensioning used in
your drawing.
(b) Describe for the above part how
:
- a CNC programme is written
; or
- a profile is defined
(c) Explain what is meant by a CAM
and CAD process.
(d) Give two advantages of
each process. |
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