Flashcards in NAVEDTRA 14176A, NEETS Mod. 4, Ch. 1 Deck (43)
Which unit of measurement is used to determine the cross-sectional area of a square or rectangular conductor?
What is the standard unit of measurement of a round wire cross-sectional area?
What can be done to increase the flexibility of wire?
What is a heavy copper strap or bar that is used to connect several circuits together?
What is the resistance in ohms offered by a unit volume (the circular-mil-foot or the centimeter cube) of a substance to the flow of electric current?
What is the reciprocal of conductivity?
What is the most common method of measuring wire size in the Navy?
American Wire Gauge (AWG)
What is a single slender rod or filament of drawn metal called?
Which type of wire is suitable for carrying an electric current?
Which type of conductor is composed of a group of wires or of any combination of groups of wires?
Which wire property is used to determine what size is needed for a given load, or current drain?
What prepares tables showing the safe current ratings for sizes and types of conductors covered with various types of insulation?
National Board of Fire Underwriters
What is the best conductor?
What are the two most commonly used conductors?
Copper and Aluminum
Only about what percent of the conductivity of copper does aluminum have?
What is the discharge of electricity from the wire when it has a high potential called?
What are generally referred to as "insulators" or "insulating material."?
Insulation resistance along with what else are the two fundamental properties of insulating materials?
What is the resistance to current leakage through the insulation materials called?
What can insulation resistance be measured with that wont damage the insulation?
What is the ability of an insulator to withstand potential difference?
What is normally used for low- or medium-range voltage?
Which standard has the National Electrical Code (NEC) adopted as the minimum requirements for rubber insulation as specified by Underwriters' Laboratories?
Latex rubber is a high-grade compound consisting of what percent of unmilled grainless rubber?
Which rubber compound does not carry the "R" designator for many of its applications?
What is one of the most common types of plastic insulating materials?
What is cotton cloth that has been coated with an insulating varnish known as?
Varnished cambric and paper insulation for cables are the two types of insulating materials most widely used at voltages above how many volts?
What is a high-temperature insulation used extensively in aircraft and equipment installations?