RCDD Test TDMMV14 Exam 2025
Questions and Answers 100% pass
Which of these cables is considered immune to electromagnetic interference?
A) Optical Fiber
B) Balanced Twisted-Pair
C) Coaxial - ✔✔A) Optical Fiber
Reference: TDMM, 14th edition, page 2-37
Which of the following terms describes the transmission of signals in both directions
at the
same time?
A) Simplex
B) Half-duplex
C) Full duplex - ✔✔C) Full Duplex
TDMM, 14th edition, page 1-39
Which of the following terms refers to signal interference between cable pairs?
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 1
,A) Crosstalk
B) Impedance
C) Delay skew
D) Power Loss - ✔✔A) Crosstalk
TDMM, 14th edition, page 1-54
Series-6 and Series-11 coaxial cables have a characteristic impedance of ___ ohms.
A) 25
B) 75
C) 100
D) 150 - ✔✔B) 75
TDMM, 14th edition, page 6-24
Balanced twisted-pair cables have a nominal characteristic impedance of ________
ohms at
100 MHz.
A) 25
B) 75
C) 100
D) 150 - ✔✔C) 100
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 2
,TDMM, 14th edition, page 1-57
Which of the following sets the standard for comparing the conductivity of metallic
cabling?
A) Copper
B) Gold
C) Silver
D) Aluminum - ✔✔A) Copper
TDMM, 14th edition, page 1-3, Table 1.1
Which optical fiber interface features an SFF design and has a simplex connector that
can be converted to a duplex using a clip?
A) LC-style optical fiber connector
B) ST-style optical fiber plugs
C) SC-style optical fiber plugs - ✔✔A) LC-style optical fiber connector
TDMM, 14th edition, page 6-81
What are the two most popular sized cores in multimode optical fiber?
A) 8 μm to 11 μm
B) 50 μm to 125 μm
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 3
, C) 62.5 μm and 50 μm
D) 100 μm and 250 μm - ✔✔C) 62.5 μm and 50 μm
TDMM, 14th edition, page 6-16
Which type of optical fiber has a small diameter featuring a core of 8 μm to 11 μm?
A) OS2
B) OM3
C) OM4
D) OM5 - ✔✔A) OS2
TDMM, 14th edition, page 6-14
What are the two major classifications of optical fiber?
A) Multimode and singlemode
B) LED and VSCEL
C) Inside plant (ISP) and outside plant (OSP)
D) Backbone and horizontal - ✔✔A) Multimode and singlemode
TDMM, 14th edition, page 1-98
There should be a minimum of ____ telecommunications room per floor.
A) No minimum is required
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 4
Questions and Answers 100% pass
Which of these cables is considered immune to electromagnetic interference?
A) Optical Fiber
B) Balanced Twisted-Pair
C) Coaxial - ✔✔A) Optical Fiber
Reference: TDMM, 14th edition, page 2-37
Which of the following terms describes the transmission of signals in both directions
at the
same time?
A) Simplex
B) Half-duplex
C) Full duplex - ✔✔C) Full Duplex
TDMM, 14th edition, page 1-39
Which of the following terms refers to signal interference between cable pairs?
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 1
,A) Crosstalk
B) Impedance
C) Delay skew
D) Power Loss - ✔✔A) Crosstalk
TDMM, 14th edition, page 1-54
Series-6 and Series-11 coaxial cables have a characteristic impedance of ___ ohms.
A) 25
B) 75
C) 100
D) 150 - ✔✔B) 75
TDMM, 14th edition, page 6-24
Balanced twisted-pair cables have a nominal characteristic impedance of ________
ohms at
100 MHz.
A) 25
B) 75
C) 100
D) 150 - ✔✔C) 100
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 2
,TDMM, 14th edition, page 1-57
Which of the following sets the standard for comparing the conductivity of metallic
cabling?
A) Copper
B) Gold
C) Silver
D) Aluminum - ✔✔A) Copper
TDMM, 14th edition, page 1-3, Table 1.1
Which optical fiber interface features an SFF design and has a simplex connector that
can be converted to a duplex using a clip?
A) LC-style optical fiber connector
B) ST-style optical fiber plugs
C) SC-style optical fiber plugs - ✔✔A) LC-style optical fiber connector
TDMM, 14th edition, page 6-81
What are the two most popular sized cores in multimode optical fiber?
A) 8 μm to 11 μm
B) 50 μm to 125 μm
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 3
, C) 62.5 μm and 50 μm
D) 100 μm and 250 μm - ✔✔C) 62.5 μm and 50 μm
TDMM, 14th edition, page 6-16
Which type of optical fiber has a small diameter featuring a core of 8 μm to 11 μm?
A) OS2
B) OM3
C) OM4
D) OM5 - ✔✔A) OS2
TDMM, 14th edition, page 6-14
What are the two major classifications of optical fiber?
A) Multimode and singlemode
B) LED and VSCEL
C) Inside plant (ISP) and outside plant (OSP)
D) Backbone and horizontal - ✔✔A) Multimode and singlemode
TDMM, 14th edition, page 1-98
There should be a minimum of ____ telecommunications room per floor.
A) No minimum is required
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 4
