BICSI Installer 2 copper study Questions + Answers Graded A+

are four classes of administration of Structure cabling system (SCS) - Answer-Class 1 single ER equipment room Class 2 multiple telecommunication spaces Class 3 multiple buildings on campus Class 4 multiple sites Endothermic - Answer-Ability to absorb heat 3 basic types of crosstalk of interest for balaced twisted pair - Answer-Near End (NEXT) Attenuation to crosstalk far end (ACRF) Alien crosstalk intumescent - Answer-Ability to expand heat Three transmission methods are - Answer-Simplex Half duplex Full duplex Simplex - Answer-Transmits signals in one direction Half Duplex - Answer-Transmits signals in either direction but only One Direction at a time Direct current (DC) - Answer-Refers to a study value that does not change the polarity of the voltage or the direction of the currentFrequency - Answer-1 cycle in 1 s = 1 Hz Full duplex - Answer-Transmit signals in both directions at the same time Capacitance 1 - Answer-Properties of conductors that allows storage of electric charges when potential differences (voltage) exist between the Conductors Capacitance 2 - Answer-Causes a voltage difference between two wires when separated by insulation Capacitance is measured in - Answer-Farads Picofarads is - Answer-One trillions of a farad What are 3 types of Bus Bars - Answer-Primary Bus Bar (PBB) Secondary Bus Bar (SBB) Rack Bus Bar (RBB) Electrical power measured in watts has two variations as known as - Answer-Apparent or reactive power and true (real) power. The basic unit of digital information is a - Answer-Bit The POTS signal range is transmitted between __________Hz which is regarded as the minimum range for human speech to be audible and recognizable. - Answer-300 and 3400 Megahertz - Answer-_______ - quantifies the bandwidth of a cable system in a frequency range of interest Megabit - Answer-______- refers to the number of bits of information that can be transported over the media DIGITAL TRANSMISSIONWhen a device First starts a transmission it will employ a nominal bass voltage of some level of volts. Example 24 V. A pulse of +3 V would indicate ______ and the line voltage would rise from 24 V to 27 V. When the voltage level returns to the 24 V base, it would represent an ________. - Answer-On state Off state Increase or decrease of three dB will result in what - Answer-A doubling or we're halving of the power Increases or decreases of 6 dB will cause a doubling or halving of the - Answer-Voltage A gauge change of __ numbers approximately doubles or halves the conductor's resistance. - Answer-3 Resistance - Answer-Is the property of a conductor to resist the flow of electricity through it and is expressed in ohms. Inductance - Answer-Is a property of Electromagnetic field built around a conductor that opposes any change in current flow in a circuit both AC and varying DC. Henry - Answer-The basic unit of inductance is a Impedance - Answer-In AC circuits the total opposition to current flow it's called _______ and is measured in ohms Characteristic impedance - Answer-The input impedance of a uniform analog transmission lines of infinite length. Insertion loss (attenuation) - Answer-Measured in decibels per unit length at a given frequency Return Loss - Answer-The amount of reflected energy is affected by the degree of impedance mismatch between the receiver any transmitterNominal Velocity of Propagation (NVP) - Answer-The ratio of the speed of transmission along a cable relative to the speed of light in a vacuum Some key factors in establishing a good connection and minimizing loss of signal include - Answer-Fit Alignment Functionality Configuration Connectors - Answer-Connecting hardware is often referred to as All category/class rated cable - Answer-Generally have a characteristic impedance of 100 ohm Near-End Crosstalk (NEXT) - Answer-Is a measure of the unwanted signal coupling from transmitter at the near end into another pair measured at the near end Attenuation-to-Crosstalk Ratio, Far-end (ACRF) - Answer-Is the measure of the unwanted signal transfer that is assistant by applying a signal on one pair at the near and measuring the signal transfer level on any disturbed pair at the receiving end of the cable (ACRF) - Answer-Is measured and expressed in decibels at the opposite end from which the source signal is transmitted Alien crosstalk (AXT) - Answer-Is the unwanted signal coupling from a disturbed pair of another 4- pair cable channel permanent link or component to a disturbed Pair of another 4 pair channel permanent link or component What does 8P8C stand for? - Answer-8-position, 8-contact