RCDD TEST TDMMV14 130 QUESTIONS AND ANSWERS
2026/2027 || TELECOMMUNICATIONS DISTRIBUTION
METHODS MANUAL (TDMM) || NETWORK INFRASTRUCTURE,
CABLING STANDARDS & DESIGN PRINCIPLES || VERIFIED
QUESTIONS & ACCURATE ANSWERS || HIGH-YIELD STUDY
GUIDE || GRADED A+
130 exam questions and answers.
Which of these cables is considered immune to electromagnetic interference?
A) Optical Fiber
B) Balanced Twisted-Pair
C) Coaxial - CORRECT ANSWER - 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 - CORRECT ANSWER - C) Full Duplex
TDMM, 14th edition, page 1-39
,Which of the following terms refers to signal interference between cable pairs?
A) Crosstalk
B) Impedance
C) Delay skew
D) Power Loss - CORRECT ANSWER - 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 - CORRECT ANSWER - 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 - CORRECT ANSWER - C) 100
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 - CORRECT ANSWER - 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 - CORRECT ANSWER - 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
C) 62.5 μm and 50 μm
D) 100 μm and 250 μm - CORRECT ANSWER - 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 - CORRECT ANSWER - A) OS2
TDMM, 14th edition, page 6-14
2026/2027 || TELECOMMUNICATIONS DISTRIBUTION
METHODS MANUAL (TDMM) || NETWORK INFRASTRUCTURE,
CABLING STANDARDS & DESIGN PRINCIPLES || VERIFIED
QUESTIONS & ACCURATE ANSWERS || HIGH-YIELD STUDY
GUIDE || GRADED A+
130 exam questions and answers.
Which of these cables is considered immune to electromagnetic interference?
A) Optical Fiber
B) Balanced Twisted-Pair
C) Coaxial - CORRECT ANSWER - 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 - CORRECT ANSWER - C) Full Duplex
TDMM, 14th edition, page 1-39
,Which of the following terms refers to signal interference between cable pairs?
A) Crosstalk
B) Impedance
C) Delay skew
D) Power Loss - CORRECT ANSWER - 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 - CORRECT ANSWER - 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 - CORRECT ANSWER - C) 100
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 - CORRECT ANSWER - 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 - CORRECT ANSWER - 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
C) 62.5 μm and 50 μm
D) 100 μm and 250 μm - CORRECT ANSWER - 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 - CORRECT ANSWER - A) OS2
TDMM, 14th edition, page 6-14
