Batteries

Question 1

a) Name one publication dealing with the storage of ship’s batteries. (2)
b) List SEVEN precautions that should be taken when working in an area where batteries are stored. (14)

Answer 1

a) Code of Safe Working Practices.
b) Adequate positive pressure ventilation must be present.
No smoking, spark, hot works, naked lights or non-approved electrical tools.
All PPE must be worn especially when handling acids.
Care should be taken of exposed battery terminals; electrical burns are likely. Metal tools should never be used within the battery space; all metal jewellery should be removed.
Battery cell caps should be securely fastened.
Do not mix battery acid in non-approved containers.

Question 2

2. With reference to secondary cell batteries:
   a) slate the two types;(4)
   John Willison IAMI Revision 57
   b) state four applications on board ship. (4)
   c) describe the maintenance required. (8)

Answer 2

a) Lead-acid and nickel cadmium batteries.
b) Emergency generator start up.
Emergency lighting.
Radio/ communication system
Navigational aids batteries.
c) Keeping the batteries and their vicinity clean.
Regular testing of the electrolyte’s specific gravity – and tipping up with distil make-up water as and when required.
Keeping the terminal connections tight and clean.
Smeared with petroleum jelly to prevent against corrosion.
Regularly testing the state-of-charge of the battery system.
Ensuring correct operation of the ventilation system.
Ensuring the light fixings are in order and of approved type
Ensuring batteries are stowed securely.