Summary Energy exam question answers Vol 1

Energy saving module answers part 1

Answer
A1. (A)

A2. What is your account?

A3. 1) cost

2) benefit

3) risk

A4. (B)

Answer
C1. (B)

C2. (A)

C3. (A)

C4. (A)

C5. (B)

C6. (A)

Answer
E1.

3 600 kj
xkj=10 kwh× =36 000 KJ
kwh


E2.

kj
x kj=1 000 m3 ×37 000 =37 000 000 kJ =37 GJ
m3


E3.
6
R R 20 kg 1 10 kj
x = × × × =R584 /GJ
GJgas kg 45 650 kj 0.75 GJ
R R7 L 1 106 kj R 230
x = × × × =
GJdiesel L 39 000 kj 0.78 GJ GJ

, Energy saving module answers part 1

E4.

R R 20 kg 1 3 600 kj
x = × × × =R 2.10/kwh
kWgas kg 45 650 kj 0.75 kwh
R R7 L 1 3 600 kj
x = × × × =R 0.83/kWh
kWhdiesel L 39 000 kj 0.78 kWh


E5.
3 6
R R4 1m 1 10 kj
x = 3× × × =R 122.85/GJ
GJgas m 37 000 kj 0.88 GJ

R R7 1L 1 106 kj
x = × × × =R 208.71 /GJ
GJoil L 39 000 Kj 0.86 Gj
R R1 1 kwh 1 10 6 kj
x = × × × =R 286.37 /GJ
GJelec kwh 3 600 kj 0.97 GJ


E6.
6
$ $ 0.06 1 kwh 10 kj
x = × × =$ 16.67/GJ
GJelec kwh 3 600 kj GJ
$ 16.67 $ x 1
= ×
GJng GJ 0.8
x=$ 13.33/GJ


E7. (B). Feul oil

$ $4 1
= × =$ 4.35
GJng GJ 0.92

$ $ 123 1 1 ton 1 kg 106 kj
= × × × × =$ 3.30
GJoil ton 0.88 1000 kg 42 000 kj GJ