Question 1:

A 15 years old, two story building, used as a warehouse, has its corrugated roofing sheets damaged and needs replacement. A mobile tower scaffold is made available to gain access to the roof of the building.

(a) Explain clearly, the precautions that may be needed when carry out repairs to the roof of the building.

(b) What are the hazards that are likely to be encounter during a demolition process?

(c) Describe the precautions needed to ensure the safe use of the mobile tower scaffold.

(d) What are further precautions that may be required to control the hazards identified in (a).

Question 2:

(a) In relation to electrical safety, explain the meaning of the following terms:

(i) Earthing (ii) reduced low voltage (iii) isolation (iv) over current protection

(b) Describe the possible effects of electricity on the body.

(c) Outline the measures to be taken to minimize the risk of shock from the use of electric hand tools.

(d) What factors should be considered in deciding the frequency of inspection and testing of portable electrical equipment and electrical tests?