A - Who can certify an LPG installation which is supplied from two 45kg cylinders? Give TWO answers.

1.
2.

                                                                        2 marks

B - Identify the TWO main constituents of LPG

1.
2.

                                                                        1 mark

C - State the air/gas rations for

  (i) Propane
  (ii) Natural Gas

                                                                        2 marks

D - Name 2 inert gases present in New Zealand natural gas.

1.
2.

                                                                        1 mark

E - State the flammability limits for LPG.

                                                                        2 marks

F - (i) Why do flueless gas space heaters sometimes cause condensation?

     (ii) What can be done to minimise the problem?

                                                                        2 marks


Total 10 marks

Linkback: http://www.plumbers.co.nz/forum/gas-exam-2005/31/question-8/286/