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SYSTEMS EXAMINATION QUESTION - MECHANISMS | |
V. Ryan © 2004 | |
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A small hillside village has discovered a fresh water
spring and wish to pump the water up to the surface, into a bottling
plant. A local engineer has developed a simple pump. |
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1. List three possible safety improvements that could be applied to this design of pump. | |
A. The mechanism at the top of the system needs to be guarded. A wire mesh or a sheet steel guard would protect the operator. |
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B. A low voltage motor to replace a 240 volts powered motor would remove the possibility of electrocution. |
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C. Adding emergency stop buttons so that the operator could stop the motorised pump immediately in case of an accident |
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2. The motor has broken down and the pulley mechanism has been removed. Draw in the box an alternative mechanism, powered by hand, that could be used as a short term alternative to the motorised system. |
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3. List four advantages / disadvantages of your design. |
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A. The mechanism is hand powered and as such it does not need electrical power. | |
B. The gears can be changed so that the ratio is improved and the handle is easier to turn or the driven gear is driven round faster or slower | |
C. .The system is simple and easy to maintain. |
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D. Two handles could be added so that the mechanism can be driven round by two people or the handle can be lengthened so that the mechanical advantage is increased. |
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