November 2010 Five Minute Quiz
28th October 2010The theme this month is "Confined Spaces". Answers are available below.
2) With regards to confined spaces, there are many hazards. These hazards fall into 3 basic categories. What are they?
3) There are 'safe' oxygen levels under normal atmospheric pressure, what are they?
4) The explosive range for each flammable gas is between what two limits?
5) Methane gas is explosive between what percentages?
6) Confined space rescue can be very tiring. Name 3 steps to minimise fatigue.
7) Name 4 triggers that can cause claustrophobia
8) Claustrophobia is a common reaction had by many people. Name 4 steps that can help you remain in control.
9) One of the physical hazards in confined spaces is known as Bridging, explain this?
10) What are the minimum requirements for PPE at a confined space incident?
ANSWERS:
1) An area where enclosed conditions and limited access can make it dangerous. It is not intended or designed primarily as a place of work. 2) Atmospheric, Physical and Psychological Hazards. 3) Minimum 19.5% to maximum 23.5% (before it becomes to oxygen enriched and a possible fire hazard). 4) LEL (lower explosive limit) and UEL (upper explosive limit). 5) 10% to 90%. 6) Work as a team and watch others for signs of fatigue, rotate workload and take frequent breaks, move away from the site when taking these breaks. 7) Initial entry into confined space, poor visibility particularly in total darkness, getting stuck or having difficulty moving, being lost or disorientated. 8) Breathing slow deep breaths and exhaling fully, remain focused on the big picture rather than the way you may feel right now, communicate with your team mates, trust your training, fellow team members and equipment. 9) When grain or other loose material clings to the side of a vessel or container when it is being unloaded from below. This can create an invisible hollow space, leaving the top intact. People have become trapped and killed when these bridges have collapsed. 10)Level 2s and BA donned and started before entering confined space.