New Zealand Gazette – 1931 – No. 16

Page 506

✨ Technical Examination Specimen Papers



506
THE NEW ZEALAND GAZETTE.
[No. 16
EXAMINATION IN WORKING DRAWING.
THIRD CLASS.
General Instructions.

  1. Draw the object clearly in pencil, but insert the dimensions and
    corresponding arrow-heads in ink.
  2. Do not draw any more parts than are specified below.
  3. Working-drawings to scale are required, and not pictorial representations.
  4. Any diagrams to which the question may refer will be provided
    by the Examiner.
  5. Insert all dimensions necessary for the construction of the object
    in the workshops, including those given in the question and those
    purposely omitted.
  6. Dimensions may be given in feet and inches, or in metrical units.
  7. Credit will be given for correct projection.
  8. The material of which different parts are to be made should be
    indicated on the drawing.
    Boiler Blow-off Cock.—The accompanying drawing illustrates in
    section the chest, plug, cover, and gland of a blow-off cock.
    You are required to draw—
    (a) A side elevation, one-half in section through the discharge
    branch, showing the various parts assembled; and
    (b) A plan of the assembled cock. Draw one-half in section through
    the discharge branch showing the plug in the closed position.
    SPECIMEN PAPERS FOR BOTH ORDINARY AND MOTOR
    EXAMINATION.
    The candidate will be expected to show that he is capable of
    making a dimensioned drawing of a part of the machinery, such that
    if the drawing were sent home from a foreign port the part in ques-
    tion could, if necessary, be accurately reproduced and the new article
    fitted in place on board ship on her return without alteration.
    SECOND CLASS.
    General Instructions (as for Third Class).
    Boss for a Three-bladed Propeller.—The accompanying drawing
    represents the boss for a loose-bladed propeller. You are required to
    draw—
    (a) A longitudinal section through the centre of one of the blade
    recesses, adding the portion of the propeller-shaft to which
    the boss is attached, and showing the method of securing
    the boss to the shaft;
    (b) An end elevation, one-half in section, as viewed from the for-
    ward end; and
    (c) A plan looking on one of the blade recesses.
    FIRST CLASS.
    General Instructions (as for Third Class).
    Spring-loaded Safety Valves.—The accompanying drawing illus-
    trates the valve-chest, one of the spring casings, a valve-seat and
    valve, and the easing-gear for a pair of spring-loaded safety-valves.
    Make a fully dimensioned working-drawing of the safety-valves,
    adding the parts which are not shown in the diagram.
    Give sufficient views for the construction of the various parts,
    including a longitudinal section showing one of the valves assembled.
    Also indicate the compression of the spring for an assumed boiler-
    pressure.


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✨ LLM interpretation of page content

🎓 Motor Examination Specimen Papers (continued from previous page)

🎓 Education, Culture & Science
Motor Examination, Specimen Papers, Working Drawing, Technical Education

🎓 Examination in Working Drawing, Third Class

🎓 Education, Culture & Science
Working Drawing, Examination, Boiler Blow-off Cock, Technical Education

🎓 Specimen Papers for Both Ordinary and Motor Examination

🎓 Education, Culture & Science
Specimen Papers, Ordinary Examination, Motor Examination, Technical Education

🎓 Examination in Working Drawing, Second Class

🎓 Education, Culture & Science
Working Drawing, Examination, Boss for Three-bladed Propeller, Technical Education

🎓 Examination in Working Drawing, First Class

🎓 Education, Culture & Science
Working Drawing, Examination, Spring-loaded Safety Valves, Technical Education