Electrical Engineering
Study Pack Q&A
When you visit the site to make a note of the physical
surroundings where construction is to take place there
is FOUR important notes to make. Name them.
Are there any three branches that could touch the power lines
once they are erected.
The soil types. If the ground is clay or sand, deeper pilings will
have to be used in erection of pylons, and the holes for poles
will have to be deeper than if the ground was more solid.
Are there people living near or on the site. It could happen that
between planning and construction people have moved onto
the land. If this is the case, an interdict and eviction notice
against them may have to be obtained.
Are there any newly erected buildings or structures?
Erection of overhead lines.
There are a number of factors to be taken into account
when planning the erection of a transmission line.
Name the FIVE most important ones.
The voltage which is going to be used
The route to be taken and the terrain to be crossed
The size of the load, taking future expansion into account
The type of supports, insulators and conductors to be used
The relative cost and merits of each factor must be taken into
consideration
, What is the purpose of (a) a strut (b) a stay wire?
Strut and stay wires are used at the beginning or end of a line
or where a change of direction takes place in order to keep the
pole upright.
Name TWO important rules that must be adhere to when
a hole has been dug for pylons and transformer
foundations.
If the ground is clay or sand, pilings have to be driven down to
bedrock
Proper earthing has to be supplied
What is the purpose of a safety belt?
Safety belts must be worn when working on high and
dangerous places such as on poles and over moving
machinery to prevent serious injuries by falling.
Name FIVE different types of towers.
Single foundation lattice tower
Broad base lattice tower
Double-circuit tower
Portal tower
Single-circuit tower
For what reason are we using insulated cross arms?
It would reduce tower height by the length of one insulator
string.
Study Pack Q&A
When you visit the site to make a note of the physical
surroundings where construction is to take place there
is FOUR important notes to make. Name them.
Are there any three branches that could touch the power lines
once they are erected.
The soil types. If the ground is clay or sand, deeper pilings will
have to be used in erection of pylons, and the holes for poles
will have to be deeper than if the ground was more solid.
Are there people living near or on the site. It could happen that
between planning and construction people have moved onto
the land. If this is the case, an interdict and eviction notice
against them may have to be obtained.
Are there any newly erected buildings or structures?
Erection of overhead lines.
There are a number of factors to be taken into account
when planning the erection of a transmission line.
Name the FIVE most important ones.
The voltage which is going to be used
The route to be taken and the terrain to be crossed
The size of the load, taking future expansion into account
The type of supports, insulators and conductors to be used
The relative cost and merits of each factor must be taken into
consideration
, What is the purpose of (a) a strut (b) a stay wire?
Strut and stay wires are used at the beginning or end of a line
or where a change of direction takes place in order to keep the
pole upright.
Name TWO important rules that must be adhere to when
a hole has been dug for pylons and transformer
foundations.
If the ground is clay or sand, pilings have to be driven down to
bedrock
Proper earthing has to be supplied
What is the purpose of a safety belt?
Safety belts must be worn when working on high and
dangerous places such as on poles and over moving
machinery to prevent serious injuries by falling.
Name FIVE different types of towers.
Single foundation lattice tower
Broad base lattice tower
Double-circuit tower
Portal tower
Single-circuit tower
For what reason are we using insulated cross arms?
It would reduce tower height by the length of one insulator
string.
