RCDD TDMM Chapter 1 Questions and Answers Already Passed
The four most common electrical conductors for ICT cable and wire are: - Answers Copper
Copper Covered Steel
High Strength Copper Alloy
Aluminum
Silver and Gold are good conductors but not generally used because of cost
Name the Conductor:
Sets the standard for comparing conductivity of other metals. - Answers Copper
Annealed copper sets the reference value of 100%. Other common conductors will have less than 100%
of annealed copper's conductivity.
Name the Conductor:
Also known as copper clad steel, it combines the conductivity of copper with the strength of steel. A
copper layer is bonded to a steel core. Typically used for aerial, self-supporting drop wire. - Answers
Copper-Covered
Name the Conductor:
A mixture of copper and other metals such as cadmium-chromium copper and zirconium copper offer
important weight reductions and greater strength. Important in aerospace and computer applications.
The alloys mentioned above have 85% conductivity rating. - Answers High-Strength Copper Alloy
Name the Conductor:
Bluish silver-white malleable ductile light trivalent metallic element that has good electrical and thermal
conductivity, high reflectivity, and resistance to oxidation. 60% conductivity rating. Lighter than copper
and most commonly used in electrical utility distribution lines. - Answers Aluminum
, This conductor has the following properties:
Electrical Conductivity: Sets the standard
Ductility: Good
Solderability: Good
Corrosion Resistance: Good
Oxidation Resistance: Good
Weight: 14.25 kg/31.4 lbs per 1000 ft
Tensile Strength: 250,000 kPa/36,259 psi per 1000 ft - Answers Copper
This conductor has the following properties:
Electrical Conductivity: Less than copper
Ductility: Good
Solderability: Good
Corrosion Resistance: Good
Oxidation Resistance: Good
Weight: 13.06kg/28.8lbs per 1000 ft
Tensile Strength: 380,000 kPa/55,114 psi per 1000 ft - Answers Copper-Covered
This conductor has the following properties:
Electrical Conductivity: 85% typical
Ductility: Best
Solderability: Good
Corrosion Resistance: Poor
Oxidation Resistance: Good
The four most common electrical conductors for ICT cable and wire are: - Answers Copper
Copper Covered Steel
High Strength Copper Alloy
Aluminum
Silver and Gold are good conductors but not generally used because of cost
Name the Conductor:
Sets the standard for comparing conductivity of other metals. - Answers Copper
Annealed copper sets the reference value of 100%. Other common conductors will have less than 100%
of annealed copper's conductivity.
Name the Conductor:
Also known as copper clad steel, it combines the conductivity of copper with the strength of steel. A
copper layer is bonded to a steel core. Typically used for aerial, self-supporting drop wire. - Answers
Copper-Covered
Name the Conductor:
A mixture of copper and other metals such as cadmium-chromium copper and zirconium copper offer
important weight reductions and greater strength. Important in aerospace and computer applications.
The alloys mentioned above have 85% conductivity rating. - Answers High-Strength Copper Alloy
Name the Conductor:
Bluish silver-white malleable ductile light trivalent metallic element that has good electrical and thermal
conductivity, high reflectivity, and resistance to oxidation. 60% conductivity rating. Lighter than copper
and most commonly used in electrical utility distribution lines. - Answers Aluminum
, This conductor has the following properties:
Electrical Conductivity: Sets the standard
Ductility: Good
Solderability: Good
Corrosion Resistance: Good
Oxidation Resistance: Good
Weight: 14.25 kg/31.4 lbs per 1000 ft
Tensile Strength: 250,000 kPa/36,259 psi per 1000 ft - Answers Copper
This conductor has the following properties:
Electrical Conductivity: Less than copper
Ductility: Good
Solderability: Good
Corrosion Resistance: Good
Oxidation Resistance: Good
Weight: 13.06kg/28.8lbs per 1000 ft
Tensile Strength: 380,000 kPa/55,114 psi per 1000 ft - Answers Copper-Covered
This conductor has the following properties:
Electrical Conductivity: 85% typical
Ductility: Best
Solderability: Good
Corrosion Resistance: Poor
Oxidation Resistance: Good
