RCDD TEST EVALUATION STUDY SHEET
2026 SOLUTION SET GRADED A+
⩥ 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.
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.
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.
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.
,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.
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.
, 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.
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.
Answer: A) OS2
2026 SOLUTION SET GRADED A+
⩥ 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.
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.
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.
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.
,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.
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.
, 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.
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.
Answer: A) OS2
