Question 4
The diagram below illustrates a safety device. Study it and answer questions 2 (a), (b) and
- (i) name the device in the diagram.[1 mark]
(ii) mention three groups of people that make use of the device [3 marks]
(iii) name two substances that the device prevents [2 marks]
- (i) Mention the system in humans that the device protect [1 mark]
(ii) list the two organs protected by the device illustrated in the diagram [2 marks]
- State the activity to be carried out on the device after use. [1 mark]
Observation
Many candidates attempted this question and their performance was fair. In part (a) (i) some candidates were unable to identify the safety device as nose mask/protector or nose guard. In part (a) (ii) they did fairly well it. In part (a) (iii) some answered it correctly and other sections of the question were answered correctly as reported by examiners.
The expected answers are as follow:
4 (a) (i) NAME OF THE DEVICE IN THE DIAGRAM
- nose mask/protector/guard
(ii) GROUPS OF PEOPLE THAT MAKE USE OF THE DEVICE
- factory/ industrial workers/farmers
- health workers/laboratory workers
- construction workers e.g. road engineers
- refuse disposal workers/waste collectors/waste managers/cleaners
(iii) SUBSTANCES THE DEVICE PREVENT
- dust/particles
- fumes/ poisonous gas/ dangerous chemical
- offensive odour
(b)(i) THE SYSTEM THE DEVICE PROTECTS
- respiratory system
(ii) ORGANS PROTECTED BY THE ILLUSTRATED DIAGRAM
- nose/lungs
- mouth
(c) ACTIVITY TO BE CARRIED OUT ON THE DEVICE AFTER USE
- proper care of the device