A Self-Learning Manual - Institution of Engineers Mauritius

A Self-Learning Manual
Mastering Different Fields of Civil Engineering Works (VC-Q&A Method) Vincent T. H. CHU
For surety bond, the contractor obtains a guarantee from a third party i.e. a
bank or an insurance company, which in return for a fee, agrees to
undertake the financial responsibility for the performance of contractor’s
obligations. This third party will pay to the employer in case there is a
contractor’s default.
For security, a sum of money is deposited in the employer’s account and
upon satisfactory fulfillment of contractor’s obligations, the sum will be
released to the contractor.
7. How does safety helmet function? (GI6)
The main principle of safety helmet is to protect workers against impact by
falling objects or struck by swinging object by energy absorption. Upon
hitting by an object, the helmet dissipates some of the energy in the
following mechanisms:
(i) Stretching of harness inside the helmet;
(ii) Partial damage of outer shell of helmet.
The remaining energy is then evenly spread around the head to reduce the
hitting stress on worker’s head.
8. Working at height is commonly defined in many countries as falling
more than 2m. Why? (GI6)
For more than 2 metres, it is commonly defined as high level fall in which
most injuries are resulted from. However, there is an increasing trend that
there has been similar number of injuries from low level falls (i.e. less than
2 metres) and from high level falls. As such, some countries have deleted
the “2 metre rule” as the definition of falling at height. Instead, it is newly
defined as working at a place from which a person could be injured by
falling from it, regardless of whether it is above, at or below ground level
without stating the level of fall.
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