1. State three broad factors that lead to human error as indicated in human factor theory of causes of accident. II. State the difference between human factor and accident/incident theory of causes of accident. Classify the following situations under the three broad factors listed in I: 1. A process plant operators training plan and records indicate that in the past 2 years they have not received training on procedures to load beer into bottling tanks. 2. An Engineer in chemical manufacturing plant wrongly instructed operators as a result of excessive noise in an operating area. 3. A process engineering supervisor became angry since operators in a gas plant have cleaned an area which has slippery condition after two days. 4. An operator spotted in a close vessel without locking steam inlet valve. 5. A maintenance technician was found in a plant without wearing safety boot. 6. An equipment operator after training is unable to operate a new installed computer aided process equipment for milling gold ore. 7. A plant supervisor encouraged operators to lift a load which is 3 times heavier than their total weight meanwhile there were mechanical means.