Describe how two-hand control device work, Other Subject

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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.

(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.

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

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