Page 101 - CAPE Green Engineering Syllabus 2016.docx_Neat

-10- 02165020/CAPE/KMS 2015 SPEC

GREEN ENGINEERING
UNIT 1 - PAPER 02
KEY AND MARK SCHEME

Question 5.

S.O Suggested Response Mark Marks
Allocation KC AK PS

1:3:1 (a) (i) No. of rooms = 500 2 6
Energy consumed per room = 3000 W
500 * 3000 = 1500000 W 1
1 KW= 1000 W
1500000 W/1000 = 15000 KWH 1
1
1:3:1 (ii) 1699.4 kWh = 1 barrel of oil 1
1500 kWh = x barrels of oil
X = (1500 * 1)/ 1699.4 = 0.88 of a
barrel of oil per hour

1:3:1 (iii) 0.88 * 24 = 21.1 barrels per day
1:3:1
(iv) 21.1 * 365 = 7701.5 barrels per
1:3:1 year

(v) 1 barrel = US $100
7701.5 = $xUS
X = 100 * 7701.5 = $770150 US

1:3:1 (b) (i) 1. By replacing all incandescent 12
lights with light-emitting
diodes (LEDs)

2. By installing automatic key 1
cards that shut off all
appliances and lights when
guests exit the room

3. By using linen reuse cards to
encourage guests to conserve on
laundry use

4. Through housekeeping practices
(such as keeping the windows
closed when the heating system
is on)

Any two