Page 159 - CAPE Green Engineering Syllabus 2016.docx_Neat

-12- 02265020/CAPE/KMS 2015 SPEC

GREEN ENGINEERING
UNIT 2 - PAPER 02
KEY AND MARK SCHEME

Question 5. (continued)

S.O Suggested Response Mark Marks
Allocation KC AK PA

(a) (iv) 44

Explanation of measures to reduce energy
consumption during production of PCC should
include:
 Use recycled aggregates
 Use cement replacement
 Mix concrete at the construction site

(a) (v) 44

Suspended reinforced concrete beam

 Labelled sketch of the suspended beam. (2
marks)

 Reinforcement placed in the lower part of
the beam as shown in the diagram. (2 marks)

(b) 3 3

Methods that can be used to reduce the
embodied energy during the manufacture of
Portland cement are:

 Use renewable energy
 Use cement replacement materials to

manufacture the cement
 Use locally available materials to produce

clinker
 Use liquefied natural gas instead of diesel

(1 mark each for any THREE)

TOTAL 20 MARKS 10 10 0