Page 654 - The City and Guilds Textbook: Plumbing Book 1 for the Level 3 Apprenticeship (9189), Level 2 Technical Certificate (8202) and Level 2 Diploma (6035)

The City & Guilds Textbook: Plumbing Book 1

8 Which of the following toxic gases that can lead to dizziness, nausea and,
in some cases, death is produced from a fossil fuel-burning appliance if
not adjusted properly?
a CO
b H O
2
c CH 4
d CO 2
9 What grade of oil is domestic kerosene?
a C

b D
c E
d F
10 What is the approximate specific gravity of natural gas?
a 0.6
b 1.0
c 1.5
d 1.9

11 What are the five categories of fuel?
12 What is added to natural gas to give it a smell that enables better
detection?
13 List at least five factors that might be considered when a client is
selecting a fuel type.
14 What is the role of Gas Safe?
15 What is combined heat and power (CHP)?

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