QUESTION 1
(a) Develop a safety program to help reduce the risks of electrical hazards in a workshop
(b) In terms of personnel education and formation, suggest some important steps that the management can take to reduce the risk of mechanical hazards during operation of the machines
QUESTION 2
(a) David March, Director of Manufacturing, is not happy with his colleague John Smith who is Director of Safety and Health at Stars Engineering Corporation. Smith has ordered two drill presses in the Manufacturing Department tagged out until point-of-operation guards are replaced. The machining supervisor, in an attempt to increase output, had his machinists remove the guards. As a result, there have been several minor injuries and a couple of more serious near misses.
i. What is meant by point-of-operation guards?
ii. What are the three types of point of operation guards? What are their advantages and limitations?
iii. Briefly describe four requirements that all safeguards should have
(b) A drill press is a versatile machine that uses a multiple-cutting-edged drill bit secured in a rotating chuck to bore and drill holes, normally into wood stock. Either in floor or bench-top designs, drill presses are usually arranged vertically, requiring the operator to raise and lower an operating handle in order to control the drill bit. These machines also have variable speeds and some have multiple spindles for gang drilling. They are usually operated by a foot pedal.
i. Describe the hazards that may be associated with the use of a drill press.
ii. Suggest some safety precautions that could be observed during the use of the drill press
QUESTION 3
Failure to properly lock out machines can be fatal. It was in the case of a 17 year old employee who was killed when the waste handling machine he was working on was inadvertenly energized. His employer was cited by OSHA for failure to implement a lockout/tagout program, among other things.
(a) What do you understand by the term energized
(b) What do you understand by the term lockout/tagout.
(c) Describe briefly five causes of electric hazards
(d) What do you understand by the term static electricity?
(e) Write short notes on the different considerations that should be taken during the design stage of an electric system to prevent electric hazards.
QUESTION 4
(a) While visiting a friend, Mary, safety director for a small manufacturer of pressurised metal containers, saw something that really bothered her. While cleaning up his yard, her friend threw all this trash into a fire contained in a metal drum. Mary noticed two aerosol cans being thrown in the fire and quickly warned her friend of the danger of explosion. He laughed and shrugged off her warning, saying "There is no danger. The can will melt before it explodes."
i. Explain what would cause the explosion of the aerosol can.
ii. Describe briefly the dangers associated with the explosion of an aerosol can.
(b) Generally, a pressure vessel is a storage tank or vessel that has been designed to operate at pressures above 15 p.s.i.g. Recent inspections of pressure vessels have shown that there are a considerable number of cracked and damaged vessels in workplaces. Cracked and damaged vessels can result in leakage or rupture failures. Destructive and non destructive testing methods may be used to detect pressure leaks and incorrect pressure levels.
i. Explain the terms destructive and non-destructive testing
ii. Name five methods that can be used to detect pressure leaks in pressure vessels and describe what would be observed in case of leakage.
iii. Write short notes on the dangers of subjecting the body to extreme pressure conditions