Page 149 - CAPE Green Engineering Syllabus 2016.docx_Neat

-2- 02265020/CAPE/KMS 2015 SPEC

GREEN ENGINEERING
UNIT 2 - PAPER 02
KEY AND MARK SCHEME

Question 1.

S.O Suggested Response Mark Marks
Allocation KC AK PA

2:1:1 (a) 44
2:1:2
 Cost 55
 Availability
 Durability
 Toxicity
 Embodied energy
 Pollution

(1 mark for any FOUR)

(b)

 Timber (processed and unprocessed)
 Vegetable fibre (processed and

unprocessed)
 Tree sap
 Animal skin
 Animal hair
 Plastics (PVC,Polyproplene, ABS,

Polycarbonate,)
(1 mark for any TWO)

2:1:5  Steel 3 3
 Aluminium
 Copper
 Zinc
 Lead
 Glass
 Brass

(1 mark for any THREE)

(c)

 Natural bio-polymers biodegrade after
service life

 The materials are readily available in the
Caribbean

 Less fossil fuel used on manufacturing
them

 Material is renewable
 Reduced pollution of the ground water
 No disposal fees
 Low manufacturing costs

(1 mark each for any THREE)