Question 1
Perforated Cable Tray
Is painted black
Has got round holes cut in it
Has got oval shaped holes cut in it
Can only be used outside
Question 2
In what standard length is cable tray usually supplied?
1.5 m
2.4 m
1 m
2 m
Question 3
Cable tray is manufactured from what material?
Tin plate.
Copper.
Brass.
Stainless and mild steel.
Question 4
If cables are fixed to cable tray in a single layer without spaces between them, which of the following is true?
They would be permitted to carry more than their normal capacity because of the added heat dissipation.
They would not be allowed by the IEE Wiring Regulations.
They can only carry their rated current.
The appropriate grouping factor must be used to de-rate them.
Question 5
The minimum radius of a cable tray bend in an installation is governed by which of the following?
The type of cable tray.
The number of cables being installed.
The CSA of the thickest cable to be installed.
Existing pipework in the area of installation.
Question 6
Why is it advisable to use trunking from one particular manufacturer across an entire installation?
Greater mechanical protection.
Reduced risk of corrosion at joints.
Greater aesthetic appeal.
Generally only one type of trunking coupler will be required.
Question 7
In which of the following materials is cable tray not available?
Resin.
Coated mild steel.
Plastic.
Copper.
Question 8
A common method of fixing for suspended Cable Tray and Trunking is
Trunking & Tray Straps
Threaded Rods & Cable Ties
Unistrut & Sky Hooks
Unistrut & Threaded Rods
Question 9
The perforations in cable tray
Allow water to escape
must be painted
allow cables to be cable tied
Make the tray heavier
Question 10
Where are perforated cable trays most frequently found?
Domestic installations.
Industrial premises.
Shops and offices.
Hotels and kitchens.
Question 11
Which of the following is the most common method for joining cable tray?
Bolting.
Cable ties.
Adhesive.
Arc welding
Question 12
Which of the following finishes is used to produce fire retardant cable tray?
Stainless steel.
Yellow chromate.
PVC coated.
Galvanised.
Question 13
Sharp edges left after cutting trunking or tray
should be coveed with insulating tape
should be painted
should be deburred
should be left
Question 14
Which of the following is not a standard type of metal trunking joint?
Outside coupler.
Punched copper strip.
Saddle.
Copper strap.
Question 15
Which of the following is not a standard cable tray finish?
Yellow chromate.
Stainless steel.
Kaolin.
Epoxy resin coated.
Question 16
Which of the following statements is not true?
Trunking is incompatible with conduit.
Detachable lids on trunking make cable installation easier and quicker.
Trunking may be connected to conduit.
Trunking is available in sizes that offer much more capacity than conduit.
Question 17
Which type of trunking may be used under a door frame?
Mini-trunking.
Frame trunking.
Architrave trunking.
Threshold Trunking
Question 18
Which of the following is not a standard cable to cable tray fixing?
Adhesive.
P Clip.
Multi way saddle.
Cable tie.
Question 19
Which of the following is used for joining return flange cable tray?
Clips.
Cable ties.
Bolts.
Adhesive.
Question 20
In what situation would you install cable tray?
In situations where various types of cables are to be installed.
In situations where space factor is a consideration.
In situations where it would be inconvenient or costly to use individual fixings.
In situations where fixing direct to the building structure is not possible or where there are obstructions such as pipework.
ANSWERS!!!!!!!!!!!!
Question 1
Perforated Cable Tray
Correct Answer: Has got oval shaped holes cut in it
Question 2
In what standard length is cable tray usually supplied?
Correct Answer: 2.4 m
Question 3
Cable tray is manufactured from what material?
Correct Answer: Stainless and mild steel.
Question 4
If cables are fixed to cable tray in a single layer without spaces between them, which of the following is true?
Correct Answer: The appropriate grouping factor must be used to de-rate them.
Question 5
The minimum radius of a cable tray bend in an installation is governed by which of the following?
Selected Answer: The type of cable tray.
Correct Answer: The CSA of the thickest cable to be installed.
Question 6
Why is it advisable to use trunking from one particular manufacturer across an entire installation?
Correct Answer: Generally only one type of trunking coupler will be required.
Question 7
In which of the following materials is cable tray not available?
Correct Answer: Copper.
Question 8
A common method of fixing for suspended Cable Tray and Trunking is
Correct Answer: Unistrut & Threaded Rods
Question 9
The perforations in cable tray
Correct Answer: allow cables to be cable tied
Question 10
Where are perforated cable trays most frequently found?
Correct Answer: Industrial premises.
Question 11
Which of the following is the most common method for joining cable tray?
Correct Answer: Bolting.
Question 12
Which of the following finishes is used to produce fire retardant cable tray?
Correct Answer: Yellow chromate.
Question 13
Sharp edges left after cutting trunking or tray
Correct Answer: should be deburred
Question 14
Which of the following is not a standard type of metal trunking joint?
Correct Answer: Saddle.
Question 15
Which of the following is not a standard cable tray finish?
Correct Answer: Kaolin.
Question 16
Which of the following statements is not true?
Correct Answer: Trunking is incompatible with conduit.
Question 17
Which type of trunking may be used under a door frame?
Correct Answer: Threshold Trunking
Question 18
Which of the following is not a standard cable to cable tray fixing?
Correct Answer: Adhesive.
Question 19
Which of the following is used for joining return flange cable tray?
Correct Answer: Clips.
Question 20
In what situation would you install cable tray?
Correct Answer: In situations where fixing direct to the building structure is not possible or where there are obstructions such as pipework.