Question 1
What is the maximum spacing between supports for a horizontal run of 20mm steel conduit?
2.25 m
1.75 m
1.5 m
2.0 m
Question 2
After the 1st fix installation of a black enamel conduit system
The positions of the conduits must be marked on the walls
The exposed steel ends must be painted to prevent corrosion.
The positions of the conduits must be marked on the ceilings
Draw wires must be installed
Question 3
Which of the following is not used for conduit?
Rubber.
Plastic.
Aluminium.
Steel.
Question 4
Which of the below is a type of conduit finish which may be found in damp environments and is resistant to corrosion?
Calvenated.
Electro-plated.
Sheradized.
Black enamelled.
Question 5
Which of the following may be used for temporarily fixing conduit before plastering in a chase in a brick wall?
A crampet.
A plain saddle.
A distance saddle.
A half saddle.
Question 6
Which one of the below is a standard size of conduit?
15mm
25mm
35mm
40mm
Question 7
In which instance must fire barriers be provided?
When a conduit run enters an inspection elbow.
When a conduit run passes through a brick wall.
When a conduit run enters a light fitting outlet box.
When a conduit run enters a restricted space.
Question 8
If a 1:20 scale drawing shows a length of conduit to be installed is 220 mm long, what is the actual length of the conduit needed?
1.1 Metres
2.2 Metres
4.4 Metres
11 Metres
Question 9
Cables in vertical run conduit must have immediate support if the drop is greater than which of the following?
10 metres.
5 metres.
2.5 metres.
7.5 metres.
Question 10
Which of the following is generally used to support a cable suspended between two buildings?
Cable tray.
Plastic trunking.
Catenary wire.
Steel conduit.
Question 11
After you have finished installing all the cables into a conduit, how much free air space should be left with nothing in it?
75%
25 %
45%
55%
Question 12
Which of the following does rigid PVC conduit not offer?
Resistance to the elements.
A potential cpc.
Excellent electrical insulation.
Resistance to corrosion caused by oxidising agents.
Question 13
Which of the following may be effectively used for fixing conduit to an uneven brickwork surface?
A plain saddle.
A hospital saddle.
A spacer bar saddle.
A distance saddle.
Question 14
In which circumstance may a half saddle be used to secure a conduit?
When plain saddles are not available.
When undertaking a rush job.
When the conduit is run in a tight corner.
Only in a horizontal drop.
Question 15
What is the temperature range for rigid PVC conduit?
0 degrees Celsius to 55 degrees Celsius.
15 degrees Celsius to 60 degrees Celsius.
5 degrees Celsius to 60 degrees Celsius.
10 degrees Celsius to 60 degrees Celsius.
Question 16
Which of the following is an advantage of plastic conduit?
It is unaffected by high temperatures.
It is easier to store.
It is resistant to corrosion.
It is very inexpensive.
Question 17
The Drill you would use when drilling a conduit saddle fixing hole into masonary would be
either 110 volts or battery, set on hammer with an appropriately sized masonary bit in the chuck
either 230 or 110 volts, set on hammer with an appropriately sized masonary bit in the chuck
either 110 volts or battery, with an 8mm diameter twist bit in the chuck
either 110 volts or battery, set on hammer with an 8mm diameter twist bit in the chuck
Question 18
Which of the following is the primary reason for using enclosed cable systems?
They provide an increased level of mechanical protection.
They protect against onerous chemicals.
They are generally the most economical option.
They offer aesthetic appeal.
Question 19
So that the effects of induced current can be avoided in a steel conduit system, which of the following practices is adopted?
Each phase conductor and the neutral (if one is present) must be enclosed separately.
All phase conductors and the neutral of any circuit in the same metallic enclosure.
Three-phase conductors may be run together but with a separate run for the neutral.
Phase and neutral conductors must be run in separate steel conduits.
Question 20
According to the information given in IEE Guidance note 1, if a 32mm conduit is given a factor of 900, what would the factor be for a 50mm conduit?
2500
2340
1800
1406
Question 21
Which of the following is a special design requirement of a conduit fixing hospital saddle?
The design must be highly economical.
The saddle and base are designed to permit minimal build up of dust and dirt.
The base must be made from plastic.
The saddle and base must be made of brass.
Question 22
What is the maximum spacing between supports for a vertical run of 25 mm heavy gauge rigid insulating conduit?
1.75 m
1.5 m
2 m
2.25 m
Question 23
After drilling a hole in a wall for a fixing
The drill bit should be cleaned
A Rawlplug must be inserted into the fixing hole
The hole must be filled with cement
The wall must be painted
Question 24
Induced current flow through a ferrous metal enclosure would produce which of the following effects?
A magnetic field which enhances current flow.
No effect at all.
A magnetic field which opposed current flow.
A magnetic field which amplifies current flow.
Question 25
Which cable-type would be used in an enclosed cable system?
Flex.
SCA cable.
SWA cable.
Single insulated cable.
Question 26
By which of the following is PVC conduit measured?
External diameter.
Internal diameter.
Circumference.
Internal radius.
Question 27
As well as diameter and length of run, what other factors determine the overall capacity of a conduit?
The ambient temperature.
The size of cables to be installed.
The number of bends.
The type of cable to be installed.
Question 28
PVC insulated non sheathed single core cables are most likely to be installed in which of the following ways?
In conduit or trunking.
Buried in the ground.
Laid directly in an external duct.
Clipped directly to a wall.
Question 29
In addition to the manufacturers advice, where can information on maximum fixing distances for rigid PVC conduit be found?
On a variation order.
On a delivery note.
In a table in IEE Guidance Note 1.
On a circuit diagram.
Question 30
In which standard length is a conduit supplied?
1.5 m
1 m
3.75 m
4 m
ANSWERS!!!!!!!!
Question 1
What is the maximum spacing between supports for a horizontal run of 20mm steel conduit?
Correct Answer: 1.75 m
Question 2
After the 1st fix installation of a black enamel conduit system
Correct Answer: The exposed steel ends must be painted to prevent corrosion.
Question 3
Which of the following is not used for conduit?
Correct Answer: Rubber.
Question 4
Which of the below is a type of conduit finish which may be found in damp environments and is resistant to corrosion?
Correct Answer: Sheradized.
Question 5
Which of the following may be used for temporarily fixing conduit before plastering in a chase in a brick wall?
Correct Answer: A crampet.
Question 6
Which one of the below is a standard size of conduit?
Correct Answer: 25mm
Question 7
In which instance must fire barriers be provided?
Correct Answer: When a conduit run passes through a brick wall.
Question 8
If a 1:20 scale drawing shows a length of conduit to be installed is 220 mm long, what is the actual length of the conduit needed?
Correct Answer: 4.4 Metres
Question 9
Cables in vertical run conduit must have immediate support if the drop is greater than which of the following?
Correct Answer: 5 metres.
Question 10
Which of the following is generally used to support a cable suspended between two buildings?
Correct Answer: Catenary wire.
Question 11
After you have finished installing all the cables into a conduit, how much free air space should be left with nothing in it?
Correct Answer: 55%
Question 12
Which of the following does rigid PVC conduit not offer?
Correct Answer: A potential cpc.
Question 13
Which of the following may be effectively used for fixing conduit to an uneven brickwork surface?
Correct Answer: A distance saddle.
Question 14
In which circumstance may a half saddle be used to secure a conduit?
Correct Answer: When the conduit is run in a tight corner.
Question 15
What is the temperature range for rigid PVC conduit?
Correct Answer: ?5 degrees Celsius to 60 degrees Celsius.
Question 16
Which of the following is an advantage of plastic conduit?
Correct Answer: It is resistant to corrosion.
Question 17
The Drill you would use when drilling a conduit saddle fixing hole into masonary would be
Correct Answer: either 110 volts or battery, set on hammer with an appropriately sized masonary bit in the chuck
Question 18
Which of the following is the primary reason for using enclosed cable systems?
Correct Answer: They provide an increased level of mechanical protection.
Question 19
So that the effects of induced current can be avoided in a steel conduit system, which of the following practices is adopted?
Correct Answer: All phase conductors and the neutral of any circuit in the same metallic enclosure.
Question 20
According to the information given in IEE Guidance note 1, if a 32mm conduit is given a factor of 900, what would the factor be for a 50mm conduit?
Correct Answer: 2340
Question 21
Which of the following is a special design requirement of a conduit fixing hospital saddle?
Correct Answer: The saddle and base are designed to permit minimal build up of dust and dirt.
Question 22
What is the maximum spacing between supports for a vertical run of 25 mm heavy gauge rigid insulating conduit?
Correct Answer: 1.75 m
Question 23
After drilling a hole in a wall for a fixing
Correct Answer: A Rawlplug must be inserted into the fixing hole
Question 24
Induced current flow through a ferrous metal enclosure would produce which of the following effects?
Correct Answer: A magnetic field which opposed current flow.
Question 25
Which cable-type would be used in an enclosed cable system?
Correct Answer: Single insulated cable.
Question 26
By which of the following is PVC conduit measured?
Correct Answer: External diameter.
Question 27
As well as diameter and length of run, what other factors determine the overall capacity of a conduit?
Correct Answer: The number of bends.
Question 28
PVC insulated non sheathed single core cables are most likely to be installed in which of the following ways?
Correct Answer: In conduit or trunking.
Question 29
In addition to the manufacturers advice, where can information on maximum fixing distances for rigid PVC conduit be found?
Correct Answer: In a table in IEE Guidance Note 1.
Question 30
In which standard length is a conduit supplied?
Correct Answer: 3.75 m