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Support => exam support and downloads => Plumbing, Gas fitting and Drainlaying Apprentice Support => Gas Exam 2006 => Topic started by: LisaS on February 11, 2009, 09:38:32 AM

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Title: Question 1
Post by: LisaS on February 11, 2009, 09:38:32 AM

QUESTION 1
(a) State THREE reasons for fitting a down-draught diverter.
 1
 2
 3
(3 marks)

(b) What is a secondary flue pipe?
(2 marks)

(c) Name the dangerous gas produced when there is incomplete combustion of the fuel gas.
(1 mark)

(d) List SIX materials that are acceptable for manufacturing flue pipes.
 1
 2
 3
 4
 5
 6
(3 marks)

(e)  State the minimum distance permitted from a 100 mm diameter flue without a flue liner to any
combustible material.
(1 mark)

(f) What is required to be fitted to the top of a flue pipe?
(1 mark)
Total 11 marks

Title: Re: Question 1
Post by: Plumber on August 26, 2009, 12:52:38 PM

Question 1
(a)

1. Ensure ingress of air
2. To prevent excessive pull on the primary flue.
3. for dilution purposes
4. for lowering the flue gas temperature
5. for preventing condensation
6. To prevent incomplete combustion

(b)

The secondary flue pipe is part of the flue pipe system between the downdrought and flue terminal.

(c)

Carbon Monoxide

(d)

Mild Steel
Copper
Stainless Steel
Aluminum
Galvanized Steel

(e)

25mm

(f)

A flue cowl
(d)