SPONSOR CPD PROGRAMME | HOT WATER Module 195 May 2022 Name (please print)........................................................................................ Job title ............................................................................................................... Organisation ..................................................................................................... 1. What is created when steel reacts with water and oxygen? Address ............................................................................................................. A Hydrated iron(I) oxide ............................................................................................................................... B Hydrated iron(II) oxide C Hydrated iron(III) oxide D Hydrated iron(IIII) oxide E Hydrated iron(IIII) oxide 2. Which of these is most likely to be basic water? A 100ppm hardness B pH 6 C pH 7 D pH 9 E Water drawn from area of granite 3. Which of these statements is most likely true? A An electrically-powered anode requires replacement every three to five years B Cathodic protection requires no maintenance C Glass linings reduce the electrochemical corroding reactions D Sacrificial anodes are typically titanium E Soft water has high electrical conductivity 4. What is the approximate minimum amount of chromium required for a steel alloy to be stainless steel? A 6% B 10.5% C 15% D 18% E 20% ............................................................................................................................... Postcode ........................................................................................................... Email ................................................................................................................... Are you a member of CIBSE? If so, please state your membership number: .................................................................................. The CIBSE Journal CPD Programme By participating in this CPD module, you consent to sharing your details with ACV. ACV may contact you via email and/or telephone with further information and technical insight on its services. You have the right to opt out from such communications at any time. I understand that I will receive marketing communications from ACV after completing this module (please tick here): By entering your details above, you agree that CIBSE may contact you with information about CPD and other training or professional development programmes, and about membership of CIBSE, if you are not a member. Go to www.cibsejournal.com/cpd to complete this questionnaire online. You will receive notification by email of successful completion, which can be used to validate your CPD records. Alternatively, fill in this page and post it to: N Hurley, CIBSE, 222 Balham High Road, London, SW12 9BS. References: 1 2 3 4 CIBSE Guide G Public health and plumbing engineering, CIBSE 2014 (rev 2017). Good Practice Guide No. 120: Avoidance of Corrosion in Plumbing Systems NPL 2011. Private communication of opinion from ACV. www.accu.co.uk/p/112-what-is-the-difference-between-ferritic-austeniticmartensitic-stainless-steels-accu accessed 11 April 2022. 5 www.corrosionpedia.com/definition/1505/chloride-stress-corrosion-crackingcscc accessed 11 April 2022. 6 Mwiks, K, An Overview of Welded Joint Corrosion: Causes and Prevention Practices. 5. Which of these is not included in the illustrated combined gas-fired condensing boiler and water heater? A Combustion chamber B Impressed current anode C Indirect water pre-heater D Modulating air/gas premix burner with fan E Stainless steel tank-in-tank 80 May 2022 www.cibsejournal.com CIBSE May 22 pp77-80 CPD 195.indd 80 22/04/2022 16:16