T2 A
A three phase distribution transformer has the secondary winding connected in star in order to
Create a neutral point
Which of the following is most commonly used light fitting in industrial installations
discharge light fittings
The resistivity (specific resistance) of a conductor depends on its
material
The three phase squirrel cage induction motor is the most commonly used motor because
of its simple construction and low cost
The direction of lines of flux in a magnetic field is considered to flow
north to south outside the magnet
The mechanism connecting the rotating windings to the brushes of a DC generator is called
the commutator
SWA cables should be installed
where there is a risk of mechanical damage to the cable
The resistivity (specific resistance) of a conductor depends on its
Material
The mechanism connecting the rotating windings to the brushes in a DC generator is called
the commutator
one factor which does not affect the resistance of a cable is
type of insulation of the cable
an example of a device that works on the principle electromagnetism is a
bell
which of the following is required for a permanent magnet to produce a magnetic field
no external power source
To prevent damage to cables a steel conduit installation must be
fully erected and fixed before cables are installed
One advantage of plastic conduit over steel conduit is
it is more resistant to corrosion
For non standard sizes of trunking the number of cables installed should not exceed a space factor of
45%
A distribution board should be located in
in a location where it is readily accessible
once a single phase split phase motor is running at its rated speed the centrifugal switch
Disconnects the start winding from the supply
compartment seperators used in metallic trunking are provided to
segregate low voltage circuits from extra low voltage circuits
The most commonly used light fitting in industrial installations is
Discharge light fittings
If the output voltage of a shaving socket is 230 volts then
The turns ratio is equal to the voltage ratio
The reason for removing a section of the outer sheath of SWA cable before terminating the gland is to ensure that the
armour conductors sre clamped in the gland body