Question 1:

(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?

Question 2:

(a) (i) Briefly describe why machinery has to be provided with guards?

(ii) What are the basic requirements for guards and safety devices to be effective?

(b) Briefly, explain the main categories of guards and safeguarding devices used so as to minimize the risk of contact with dangerous parts of machinery.

(c) (i) Describe how a Two-Hand control (2HC) device work.

(ii) Give ONE advantage and TWO disadvantages of this device.