2003 HSC Engineering Studies Marking Guidelines

Transcription

1 003 HSC Engineering Studies Marking Guidelines Question (a) Outcomes assessed: H., H., H4.3 Applies all four knowledge areas appropriately to aircraft design or construction Applies three knowledge areas appropriately to aircraft design or construction Loosely associates all four knowledge areas Applies two knowledge areas appropriately to aircraft design or construction Loosely associates three knowledge areas Applies only one knowledge area appropriately to aircraft design or construction Loosely associates two knowledge areas 4 3

2 003 HSC Engineering Studies Marking Guidelines Question (b) (i) Outcomes assessed: H., H. Outlines well how improvements to materials have affected two features 3 Outlines well how improvements to materials have affected one feature Outlines basically how improvements to materials have affected two features Outlines basically how improvements to materials have affected one feature Question (b) (ii) Outcomes assessed: H., H., H4. Discuss well the societal effects of changes to two features 3 Discusses well the societal effects of changes to one feature Outlines two societal effects Outlines one societal effect Question (a) (i) Outcomes assessed: H3., H6., H6. Correct equations, working and/or answer Some understanding but incorrect answer Question (a) (ii) Outcomes assessed: H., H. Two benefits, with explanation One benefit, with explanation Lists two benefits with little or no explanation

3 003 HSC Engineering Studies Marking Guidelines Question (a) (iii) Outcomes assessed: H., H., H6. Answer discussing two factors 3 An answer discussing one factor States two factors States one factor Question (b) Outcomes assessed: H3., H3.3 Good overall shape with some minor errors using a pictorial method 3 Reasonable overall shape with some minor errors of a pictorial method Some aspects of major components in relative position Question 3 (a) Outcomes assessed: H., H. A description of the structure and resultant properties through the rail 3 Description of structure and one property Description of two properties Outline of structure Description of one property Identification of two properties

4 003 HSC Engineering Studies Marking Guidelines Question 3 (b) Outcomes assessed: H3., H6., H6. Correct equations, working and/or answer 3 Demonstrates a general understanding with some minor errors Demonstrates a limited understanding of the question Question 3 (c) (i) Outcomes assessed: H4., H6., H6. Describes how the magnetic field of the coil causes the coil to rotate due to attraction and repulsion of components Displays a limited understanding of the operation of an electric motor Question 3 (c) (ii) Outcomes assessed: H6., H6. Describes two applications for electric motors in transport systems Describes only one application of electric motors in transport systems Describes two types of electric motors used in transport systems without describing an application Question 4 (a) Outcomes assessed: H3. Using acceptable method and/or correct solution Acceptable method minor errors

5 003 HSC Engineering Studies Marking Guidelines Question 4 (b) (i) Outcomes assessed: H3. Correct diagram shape and appropriate label of values Correct diagram shape and incorrect label of values Incorrect diagram shape and correct label of values (calculations) Appropriate calculations not applied to a diagram Question 4 (b) (ii) Outcomes assessed: H3. Correct equations, working and/or answer 3 Correct method but minor errors in calculations Limited understanding of the question demonstrated Question 4 (c) Outcomes assessed: H., H. Names another manufacturing process and contrasts two properties with those of powder formed gears Names another manufacturing process and contrasts one property with those of powder formed gears Outlines the properties of powder formed gears Names an alternative forming process 3

6 003 HSC Engineering Studies Marking Guidelines Question 5 (a) Outcomes assessed: H3., H6. Good explanation of airspeed indicator operation 3 Reasonable explanation of airspeed indicator operation Poor explanation of airspeed indicator operation Question 5 (b) (i) Outcomes assessed: H., H. Demonstrates a reasonable understanding that aluminium forms a protective oxide layer which prevents further corrosion Basically explains that aluminium forms a protective or oxide layer Question 5 (b) (ii) Outcomes assessed: H., H. Identifies both an advantage and a disadvantage Identifies either one advantage or one disadvantage Question 5 (c) (i) Outcomes assessed: H6., H3. A good comparison of the nature of stress both on the ground and in flight 3 A reasonable comparison of the nature of stress both on the ground and in flight A basic comparison of the nature of stress both on the ground and in flight

7 003 HSC Engineering Studies Marking Guidelines Question 5 (c) (ii) Outcomes assessed: H6., H3. Correct equations, working and/or answer 3 Demonstrates a general understanding with some minor errors Demonstrates a limited understanding of the question Question 5 (d) Outcomes assessed: H3., H6. Outlines two conditions which cause stalling Outlines one condition which causes stalling Question 6 (a) (i) Outcomes assessed: H., H. States an application for each material and explains why each is used 4 States two applications but gives poor reasons States one application with two reasons 3 Provides two good explanations of properties States two applications and gives one reason States one application and explains why it is used Provides a limited explanation of two properties States two applications States one application plus a limited explanation of properties Provides a good explanation on one material property

8 003 HSC Engineering Studies Marking Guidelines Question 6 (a) (ii) Outcomes assessed: H., H. Describes two problems associated with cold drawing for this use and describes a heat treatment process at the various stages Describes two problems but does not describe the heat treatment process Describes one problem and describes the heat treatment process Describes one problem Describes the treatment process 3 Question 6 (b) Outcomes assessed:h., H4., H4., H4.3 Two changes identified and related societal effect for each discussed 4 Two changes identified and one related societal effect discussed Discussion of two societal effects with implied technological changes 3 One change identified and two related societal effects discussed One change identified with one related societal effect discussed Two changes identified with unrelated effect(s) One change identified and one unrelated effect Two changes with no discussion given Two effects of technological change listed Question 6 (c) (i) Outcomes assessed: H4. Description of transmission from mobile phone to mobile phone Description of transmission from mobile phone to tower

9 003 HSC Engineering Studies Marking Guidelines Question 6 (c) (ii) Outcomes assessed: H4.3, H. Explains one effect and states two situations States two situations Explains one effect States one effect and one situation Question 7 (a) Outcomes assessed: H3., H4., H4.3 Good outline of both issues Good outline of one appropriate issue Identification of two issues Question 7 (b) Outcomes assessed: H3., H3.3 Correct assembly and proportion of components in two views (some 4 latitude with accuracy) Reasonable assembly and proportion of components 3 Basic assembly and proportion of components Poor assembly and proportion of components

10 003 HSC Engineering Studies Marking Guidelines Question 7 (c) (i) Outcomes assessed: H., H3. Makes clear the relationship between the size and shape of members and the nature of the forces (tension/compression) acting on them Poor explanation of relationship of shape and size of member to nature of forces acting Question 7 (c) (ii) Outcomes assessed: H., H., H., H4., H4.3 Discussion of at least one development related to textiles in shade areas Discussion of one development Question 8 (a) Outcomes assessed: H3.3, H4., H5. Discusses at least two points about CAD vs traditional methods 3 Identifies two points, without discussion Discusses one point Identifies one point Question 8 (b) (i) Outcomes assessed: H., H., H. Description of a suitable forming process Identification of a suitable process

11 003 HSC Engineering Studies Marking Guidelines Question 8 (b) (ii) Outcomes assessed: H., H., H. Outline of or more appropriate reasons related to service Outline of appropriate reason related to service Outline of or more reasons not related to service Question 8 (c) Outcomes assessed: H3.3, H3. Correctly answer the question 3 Demonstrates a general understanding with some minor errors Demonstrates a limited understanding of the question