Don't Get Your Wires Crossed
Test your wiring knowledge in this month's quiz. Do you know the proper procedures when it comes to handling wires and cables?
- 1.
When bending 8 conductor / 4 pair UTP cable the bend should not be less than ____ times the cable ____.
- A.
4 / radius
- B.
8 / diameter
- C.
2 / circumference
- D.
4 / diameter
- E.
Makes no difference on UTP cable
Correct Answer
D. 4 / diameterExplanation
When bending a UTP cable, it is important to ensure that the bend radius is not less than 4 times the cable diameter. This is because bending the cable too tightly can cause signal loss and interference, leading to poor performance or even complete failure of the cable. By maintaining a minimum bend radius, the cable's integrity and signal quality are preserved, ensuring optimal performance.Rate this question:
-
- 2.
Nonconductive optical fiber cables shall be permitted to occupy the same cabinet, panel or similar enclosure of Class 1 circuits.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Nonconductive optical fiber cables should not be permitted to occupy the same cabinet, panel, or similar enclosure of Class 1 circuits. This is because Class 1 circuits are high-voltage circuits that carry a significant amount of electrical energy. Mixing nonconductive optical fiber cables with Class 1 circuits could potentially create a safety hazard, as the nonconductive cables may not provide adequate insulation from the high voltage present in the Class 1 circuits. Therefore, it is important to keep nonconductive optical fiber cables separate from Class 1 circuits to ensure the safety and integrity of the electrical system.Rate this question:
-
- 3.
When referring to cable terminations, the “RJ” designation means _____.
- A.
Restricted Jack
- B.
Registered Junction
- C.
Registered Jack
- D.
Revised Joint
Correct Answer
C. Registered JackExplanation
The "RJ" designation in cable terminations stands for Registered Jack. This term refers to a standardized interface used for connecting telecommunications equipment. The Registered Jack system was developed by the Bell System in the 1970s to ensure compatibility and ease of use in telephone networks. The RJ designation is followed by a number that indicates the specific wiring configuration and functionality of the jack.Rate this question:
-
- 4.
____ is a connector for high-speed Category 7 (S/FTP) cabling systems.
- A.
GG45
- B.
RJx45
- C.
BP101
- D.
RJ11
Correct Answer
A. GG45Explanation
GG45 is a connector specifically designed for high-speed Category 7 (S/FTP) cabling systems. It provides a reliable and efficient connection for transmitting data at high speeds. Unlike other options listed, such as RJx45 and RJ11, GG45 is specifically designed for Category 7 cabling systems, making it the correct answer in this context. BP101 is not a known connector for cabling systems, so it can be ruled out as the correct answer.Rate this question:
-
- 5.
According to the NEC, wires are measured in AWG and ____.
- A.
Mils
- B.
Kmils
- C.
Kcmils
- D.
Inches
Correct Answer
C. KcmilsExplanation
The National Electrical Code (NEC) states that wires are measured in American Wire Gauge (AWG) and kcmils. AWG is used to measure the diameter of the wire, while kcmils is used to measure the cross-sectional area of the wire. This allows for a more precise measurement and calculation of the wire's capacity to carry current. Therefore, the correct answer is kcmils.Rate this question:
-
- 6.
On an 8-pin jack, which colors are used for pair 2?
- A.
Blue / White-Blue
- B.
White-Brown / Brown
- C.
White-Orange / Orange
- D.
White-Green / Green
Correct Answer
C. White-Orange / OrangeExplanation
The correct answer is White-Orange / Orange. This is because in an 8-pin jack, pair 2 is represented by the colors White-Orange and Orange. Each pair in an 8-pin jack is assigned a specific color combination, and in this case, White-Orange and Orange are used to represent pair 2.Rate this question:
-
- 7.
Communications wires and cables shall be separated at least ____ from electric light or power conductors not in a raceway.
- A.
2 inches
- B.
4 inches
- C.
3 feet
- D.
7 meters
Correct Answer
B. 4 inchesExplanation
Communications wires and cables need to be separated at least 4 inches from electric light or power conductors not in a raceway. This distance is necessary to prevent interference and potential damage to the communication signals caused by the electrical power conductors. By maintaining a separation of 4 inches, the risk of cross-talk or electromagnetic interference is minimized, ensuring proper communication transmission and safety.Rate this question:
-
- 8.
According to Table C.1 of the NEC, the maximum number of conductors of type THHN, with a size of 12 AWG, permitted to be in a ¾ inch EMT conduit is _____.
- A.
4
- B.
7
- C.
16
- D.
24
Correct Answer
C. 16Explanation
According to Table C.1 of the NEC, the maximum number of conductors of type THHN, with a size of 12 AWG, permitted to be in a ¾ inch EMT conduit is 16.Rate this question:
-
- 9.
The "skin effect is _____.
- A.
The “peeling” back of the outer layer of coax cable due to extreme temperatures
- B.
The tendency of alternating current, as its frequency increases, to travel only on the surface of a conductor
- C.
The irritation caused by handling untreated coaxial cable much like that of fiberglass insulation
- D.
The method by which the skin of a coaxial cable is properly “stripped” and the center conductor is exposed
Correct Answer
B. The tendency of alternating current, as its frequency increases, to travel only on the surface of a conductorExplanation
The skin effect refers to the tendency of alternating current, as its frequency increases, to travel only on the surface of a conductor. This means that at higher frequencies, the current flows primarily on the outer layer of the conductor, while the inner layers carry less current. This phenomenon occurs because at higher frequencies, the current experiences greater resistance in the conductor's core, causing it to concentrate on the surface where the resistance is lower.Rate this question:
-
- 10.
A ____ has the following characteristics: 125-micron cladding diameter and increased bandwidth with a smaller size.
- A.
Single-mode optical fiber
- B.
Multimode 62.5-micron fiber
- C.
Multimode 50-micron fiber
- D.
Glass-encased optical fiber
Correct Answer
C. Multimode 50-micron fiberExplanation
A multimode 50-micron fiber has a smaller cladding diameter compared to a multimode 62.5-micron fiber. This smaller size allows for increased bandwidth, meaning it can carry more data over longer distances. Additionally, being a multimode fiber, it supports multiple modes or paths for light to travel through, which allows for greater flexibility in transmitting signals. Overall, the characteristics of a multimode 50-micron fiber make it suitable for applications that require higher bandwidth and smaller size.Rate this question:
-
- 11.
Which is a true statement?
- A.
CMX cable shall be permitted to be used in place of CATVX.
- B.
CATV cable shall be permitted to be used in place of CMP.
- C.
CMG cable shall be permitted to be used in place of CMP.
- D.
FPLR cable shall be permitted to be used in place of CMP.
Correct Answer
A. CMX cable shall be permitted to be used in place of CATVX.Explanation
The correct answer is CMX cable shall be permitted to be used in place of CATVX. This is because CMX cable is a type of cable that is suitable for outdoor use, while CATVX cable is specifically designed for use in cable television systems. Therefore, CMX cable can be used as a substitute for CATVX cable.Rate this question:
-
- 12.
A fiber optic ____ connector has a 2.5mm ferrule tip with screw-on mechanism. It is keyed to prevent tip rotation and damage to the mated fiber. It is typically used for single-mode applications.
- A.
ST
- B.
FC
- C.
SC
- D.
LC
Correct Answer
B. FCExplanation
The correct answer is FC. The FC (Fiber Connector) connector has a 2.5mm ferrule tip with a screw-on mechanism. It is designed to prevent tip rotation and damage to the mated fiber. The FC connector is commonly used for single-mode applications.Rate this question:
-
- 13.
The maximum spacing between supports permitted by the NEC for Rigid Polyvinyl Chlorid Conduit, trade size 1¼ - 2, is ____.
- A.
12 inches
- B.
3 feet
- C.
5 feet
- D.
7 feet
Correct Answer
C. 5 feetExplanation
The NEC (National Electrical Code) sets guidelines for the installation of electrical systems. In this case, the question is asking about the maximum spacing between supports for Rigid Polyvinyl Chloride (PVC) Conduit, trade size 1¼ - 2. The correct answer is 5 feet. This means that when installing this type of conduit, the supports or hangers must be placed no further apart than 5 feet to ensure proper support and prevent sagging or damage to the conduit.Rate this question:
-
- 14.
The requirements of Section 300.22(A) of the 2014 NEC do not apply to conductive optical fiber cables in ducts used for dust, loose stock or vapor removal.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The statement is false because the requirements of Section 300.22(A) of the 2014 NEC do apply to conductive optical fiber cables in ducts used for dust, loose stock, or vapor removal. This means that these cables must meet the specific requirements outlined in the NEC for their installation and use in these types of ducts.Rate this question:
-
Quiz Review Timeline +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
-
Current Version
-
Feb 20, 2023Quiz Edited by
ProProfs Editorial Team -
Nov 21, 2014Quiz Created by
Vankirkad
Back to top