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What is the MOST likely cause for you to investigate?
You have discovered a common mode current on the metallic cable sheaths of your building riser cables. What is the MOST likely cause for you to investigate?A . Lack of cable protectionB . Two separate and distinct ground referencesC . Improper secondary protectionD . Improper physical protection of cableE ....
Which of the following is an undesirable electromagnetic effect on a device(s)?
Which of the following is an undesirable electromagnetic effect on a device(s)?A . (EMC)B . Electromagnetic interference (EMI)C . Radio frequency interference (RFI)D . Fast transientsE . Electrostatic discharge (ESD)View AnswerAnswer: B
In the ceiling zone method of distribution, the usable floor area should be divided into zones each measuring:
In the ceiling zone method of distribution, the usable floor area should be divided into zones each measuring:A . 9.3 sq m (100 sq ft) to 23 sq m (250 sq ft)B . 23 sq m (250 sq ft) to 56 sq m (600 sq ft)C . 23 sq m...
Which of the following is NOT an example of a perimeter pathway?
Which of the following is NOT an example of a perimeter pathway?A . Furniture pathwaysB . Surface racewaysC . Multi channel racewaysD . Under carpet cablingE . Raceways integrated within wallsView AnswerAnswer: A
Using the "pathway design" for horizontal cable distribution, how many cable runs are placed to serve 15 individual?
Using the "pathway design" for horizontal cable distribution, how many cable runs are placed to serve 15 individual?A . 15B . 30C . 45D . 60View AnswerAnswer: C
A common mode (CM) signal can be converted to a differential mode (DM) signal as a result of a(n):
A common mode (CM) signal can be converted to a differential mode (DM) signal as a result of a(n):A . Unbalanced circuitB . Grounded circuitC . Poorly timed signalD . Improper dielectric materialView AnswerAnswer: A
The ability of a device to withstand electromagnetic disturbances from another device is:
The ability of a device to withstand electromagnetic disturbances from another device is:A . Electromagnetic interference (EMI)B . Radio Frequency Interference (RFI)C . (EMC)D . Fast transientsE . Electrostatic Discharge (ESD)View AnswerAnswer: C
Composite conductors, although not generally recommended, may be used in special circumstances because they provide all of the following advantages EXCEPT:
Composite conductors, although not generally recommended, may be used in special circumstances because they provide all of the following advantages EXCEPT:A . Have good digital transmission characteristicsB . LightweightC . InexpensiveD . Easy to produceE . Easily embedded into other materialsView AnswerAnswer: A
What is the signal-to-noise ratio (SNR) (dB) at the receiver input?
The signal at the input to a balanced twisted pair cable is 10 mW. The cable is 1000 feet long and has an attenuation of 1 dB per 100 feet. This cable is connected to the input of a receiver. The noise level at the input to the receiver is...
The ability of a conductors insulation to transmit an electric field is called:
The ability of a conductors insulation to transmit an electric field is called:A . ConductivityB . TransmitabilityC . PermittivityD . CapacitanceE . ReactanceView AnswerAnswer: C
