
Steel Trunking Quiz
Authored by John Shermer
Construction
Vocational training
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a disadvantage of steel trunking?
Minimises fire risks.
Permits easy rewiring.
Requires skill to fabricate and install.
Can accommodate many cables of different sizes.
Answer explanation
The correct choice, 'Requires skill to fabricate and install,' highlights a disadvantage of steel trunking, as it necessitates specialized knowledge and expertise for proper installation, unlike other options that present advantages.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does steel trunking permit that is beneficial for electrical systems?
Easy rewiring.
Increased cost.
Corrosion.
Difficult installation.
Answer explanation
Steel trunking allows for easy rewiring of electrical systems, making it convenient to modify or upgrade wiring without extensive labor or disruption. This flexibility is a key benefit for maintaining efficient electrical installations.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the thermosetting cable factor for a solid conductor with a cross-sectional area of 2.5 mm²?
8.6
11.9
13.9
16.6
Answer explanation
The thermosetting cable factor for a solid conductor is determined based on its cross-sectional area. For a 2.5 mm² conductor, the correct factor is 11.9, which is derived from standard electrical engineering tables.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
For a stranded conductor with a cross-sectional area of 4 mm², what is the PVC cable factor?
8.6
12.6
16.6
21.2
Answer explanation
The PVC cable factor for a stranded conductor is calculated based on its cross-sectional area. For 4 mm², the correct PVC cable factor is 12.6, which is a standard value used in electrical installations.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
For a stranded conductor with a cross-sectional area of 25 mm², what is the PVC cable factor?
73.9
47.8
35.3
21.2
Answer explanation
The PVC cable factor for a stranded conductor with a cross-sectional area of 25 mm² is calculated based on standard values. The correct factor is 73.9, which is commonly used for this size of conductor.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which trunking dimension has a factor of 1555?
75 x 38 mm
75 x 50 mm
100 x 25 mm
100 x 38 mm
Answer explanation
The trunking dimension 75 x 50 mm corresponds to a factor of 1555, making it the correct choice. The other options do not match this factor.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which trunking dimension corresponds to a factor of 39428?
300 x 200 mm
300 x 225 mm
300 x 300 mm
225 x 225 mm
Answer explanation
The area of the trunking dimension 300 x 300 mm is 90000 mm², which is the only option that can correspond to a factor of 39428 when considering the dimensions. The other options do not yield a matching factor.
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