Conductors

Question 0

An insulation used where flexibility and abrasion resistance are of prime importance

Answer 0

Rubber

Question 1

What two elements are widely used for common conductors?

Answer 1

Copper, Aluminum

Question 2

The CEC defines this term as voltages 30 volts or less

Answer 2

Extra low voltage pop

Question 3

A collection of wires twisted together in no particular geometric arrangement

Answer 3

Bunch wiring

Question 4

This wire is insulated by dipping in varnish or enamel

Answer 4

Magnet wire

Question 5

What element has excellent conductance

Answer 5

Silver

Question 6

What is ultimate strength

Answer 6

The amount mechanical stress wire will with stand before it breaks

Question 7

Excellent malleability good conductance. Used in electronic contacts.

Answer 7

Gold

Question 8

It is thought of as the opposite of resistance

Answer 8

Conductance

Question 9

Name 3 problems with Aluminum

Answer 9

Aluminum oxide forms easily at terminals resistance occurs
Electrolysis
Cold flow

Question 10

Is cheap has high ultimate strength and poor conductance

Answer 10

Steel

Question 11

A mineral used for insulation and capable of operation and very high temperature

Answer 11

Magnesium oxide

Question 12

Formula for finding cm to sm and vice versa

Answer 12

Sma= Cma x .7854

Cma= Sma / .7854

Question 13

A trade name for polyvinyl chloride

Answer 13

Flame seal

Question 14

Insulation that is moisture and chemical resistant, non-corrosive to copper, high het transferability and not costly

Answer 14

Enamel

Question 15

A type of insulation material that softens when heated,and hardens when cooled

Answer 15

Thermo plastic

Question 16

Good malleability and excellent conductance

Answer 16

Silver

Question 17

Define a bus bar

Answer 17

They are used in high current application, mainly used in distribution, and usually made of copper and aluminum

Question 18

How do recognize cross link insulation?

Answer 18

XLEP or Xlink

Question 19

Insulation marked XLEP or X-link

Answer 19

Polyethylene

Question 20

What awg is the largest solid strand found in??

Answer 20

No. 9 and smaller

Question 21

Concentric cables twisted together concentrically

Answer 21

Rope strand

Question 22

Define power circuit wiring:

Answer 22

Conductor and cable installation for distribution of electrical energy within residential, commercial, and industrial buildings

Question 23

Defines Kirchhoff’s voltage law

Answer 23

Around any closed loop, the algebraic sum of all voltages are zero.

Question 24

What is the difference between low voltage and extra low voltage

Answer 24

Low voltage: is voltages 31 to 750 v

Extra low voltage: 30v and lower

Question 25

What is cold flow?

Answer 25

When a material under pressure accepts a new shape

Question 26

What are common voltage ratings for teck?

Answer 26

600v, 1kv, and 5 kv

Question 27

Define Ohm’s law

Answer 27

The current flowing in a circuit is directly proportional to the applied voltage and inversely proportional to the resistance

Question 28

What similarities do extra low an low voltage have?

Answer 28

The are considered control circuits

Question 29

State 4 factors that affect resistance of any conductor.

Answer 29

A. Natural resistance
B. length
C. CMA
D. Temperature

Question 30

Voltage drop formula

Answer 30

VD= (2KL*I)/CMA

Question 31

How can you tel if a load is balanced or unbalanced?

Answer 31

The neutral line will have zero amps