RCDD Chapter 11 Field Testing (Non-core Area)

39 Questions | By Letad1 | Updated: Mar 20, 2022 | Attempts: 254

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Registered Communications Distribution Designer (RCDD)

Questions and Answers

1.

A visual fault locator operates in the visible light range.
- A.
  
  True
- B.
  
  False
2.

What is the visible light range.
- A.
  
  200-500 nm
- B.
  
  300-500 nm
- C.
  
  400-700 nm
- D.
  
  500-700 nm
3.

An Optical Time Domain Reflectometer (OTDR) requires access to _____ end(s) of the optical fiber, and sends pulses of light into an optical fiber and measures the strength of the power.
- A.
  
  One end
- B.
  
  Both ends
4.

What is one of the most basic and widely used field test instruments available.
- A.
  
  Time Domain Reflectometer (TDR)
- B.
  
  Frequency Domain Reflectometer (FDR)
- C.
  
  Digital Multimeter (DMM)
- D.
  
  Wire Map Field Test Instruments (WMFTI)
5.

Which of the following is not a field testing acceptance parameters for balanced twisted-pair cabling.
- A.
  
  Length
- B.
  
  NEXT loss
- C.
  
  Slice loss
- D.
  
  Return loss
- E.
  
  Insertion loss
6.

The larger the value of ELFEXT loss in dB, the better the performance.
- A.
  
  True
- B.
  
  False
7.

What is the measure of the power reflected from the cable. (in dB)
- A.
  
  Delay skew
- B.
  
  Echo
- C.
  
  Signal to Noise ratio
- D.
  
  Return loss
- E.
  
  Insertion loss
8.

Insertion loss was formerly known as:
- A.
  
  Resistance
- B.
  
  Echo
- C.
  
  Attenuation
- D.
  
  Delay
9.

What is used to calculate the length of a cable by measuring the time it takes to travel down the cable and back. (round trip delay)
- A.
  
  FDR
- B.
  
  TDR
- C.
  
  DMM
- D.
  
  ACR
10.

Additional equipment used for optical fiber troubleshooting include a visual light source, also called what:
- A.
  
  Optical fiber laser
- B.
  
  Optical fiber light-emitting diode (LED)
- C.
  
  Optical VCSEL
- D.
  
  Optical flashlight
- E.
  
  Optical beam diode
11.

The mandrel diameters are based on nominal values of _____ and ______ reduced by the cable diameter and rounded up.
- A.
  
  10 mm (0.4 in) and 12.5 mm (0.5 in)
- B.
  
  20 mm (0.8 in) and 25 mm (1 in)
- C.
  
  15 mm (0.6 in) and 18 mm (0.75 in)
- D.
  
  25 mm (1 in) and 51 mm (2 in)
12.

When testing multimode fiber for end to end attenuation, wrap the test jumper attached to the source with five non-consecutive turns around a specifically-sized _________.
- A.
  
  Barrel
- B.
  
  Cork
- C.
  
  Mandrel
- D.
  
  Wheel and Bob
13.

What provides the ability to identify a specific pair by generating a tone on one end of a pair of conductors.
- A.
  
  Fluke
- B.
  
  Tone generator
- C.
  
  Wand
- D.
  
  Cable tracer
14.

When testing cables, a Pass* is a passing test within the accuracy range (but at the accuracy limit) of the field test instruments pass/fail boundary. This indicates that the test result should be _________.
- A.
  
  Retake
- B.
  
  Considered a fail
- C.
  
  Viewed with caution
- D.
  
  Treated like all passing grades
15.

When testing coaxial cable, the required tests or acceptance tests depend on what________.
- A.
  
  The length of cable
- B.
  
  The type of cable
- C.
  
  The application
- D.
  
  The installation technique
16.

Which of the performance tests below are most often used on coaxial cabling.
- A.
  
  Time domain reflectometer (TDR)
- B.
  
  Frequency domain reflectometer (FDR)
- C.
  
  Insertion loss
- D.
  
  Attenuation
- E.
  
  Noise
17.

Which of the performance tests below are most often used on coaxial cabling.
- A.
  
  Direct current (dc) loop resistance
- B.
  
  NEXT
- C.
  
  Impedance
- D.
  
  SNR
- E.
  
  Length
18.

Select the true statements about coaxial cabling:
- A.
  
  Used in broadband applications
- B.
  
  Low impedance media, 50 or 75 ohm
- C.
  
  Used with single transmission path
- D.
  
  In the past it was used on local area networks
- E.
  
  All of the above
19.

Power sum measurements across all pairs are practical with field test instruments.
- A.
  
  True
- B.
  
  False
20.

A cable manufacturer's power sum measurement is required for multipair cables.
- A.
  
  True
- B.
  
  False
21.

What level of instrument accuracy for field testing is defined for measurements up to category 5e and class D cabling?
- A.
  
  Level I
- B.
  
  Level II
- C.
  
  Level IIe
- D.
  
  Level III
- E.
  
  Level IIIe
22.

What level of instrument accuracy for field testing is defined for measurements up to category 6 and class E cabling?
- A.
  
  Level I
- B.
  
  Level II
- C.
  
  Level IIe
- D.
  
  Level III
- E.
  
  Level IIIe
23.

What is used to determine the return loss
- A.
  
  The ratio of the reflected voltage to the incident voltage
- B.
  
  The ratio of the induced voltage to the reflected voltage
- C.
  
  The ratio of NEXT loss to insertion loss
- D.
  
  The difference of the reflected voltage to the induced voltage
24.

The field-testing acceptance parameters for balanced twisted-pair cabling are:
- A.
  
  Wire map and length
- B.
  
  Insertion loss and return loss
- C.
  
  NEXT, ELFEXT, PSNEXT, and PSELFEXT
- D.
  
  Propogation delay and delay skew
- E.
  
  All of the above
25.

When testing balanced twisted pair, If a field test instrument uses the same nominal velocity of propogation (NVP) for all pairs, the reported length will be different for each pair. Standards require that the __________ be used as the basis for the pass/fail decision.
- A.
  
  Average electrical length
- B.
  
  Longest electrical length
- C.
  
  Shortest electrical length