Michigan Telecommunications
Advanced Specialist Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. A fiber-optic link experiences modal dispersion primarily because of
differences in:
A. core refractive index profile
B. propagation times of various modes
C. optical wavelength fluctuations
D. connector insertion loss
Modal dispersion occurs when different guided modes travel at
different speeds, causing pulse spreading.
2. In a SONET network, the basic transmission rate, STS-1, corresponds to
a bit rate of:
A. 34.368 Mbps
B. 51.84 Mbps
C. 155.52 Mbps
D. 622.08 Mbps
STS-1 carries data at 51.84 Mbps, forming the building block for
higher levels.
3. The primary purpose of a PDH (Plesiochronous Digital Hierarchy)
system is to:
A. multiplex asynchronous channels
B. demodulate RF signals
C. aggregate multiple digital streams into higher bit rates
, D. provide error correction on analog voice
PDH systems combine multiple lower-rate digital signals into a
higher-rate aggregate.
4. A technician testing a coaxial drop using a time domain reflectometer
(TDR) observes a large reflection at 200 meters. This most likely
indicates:
A. correct impedance matching
B. a splice within tolerance
C. a significant impedance discontinuity
D. acceptable attenuation profile
A large TDR reflection indicates a fault such as a break or bad
connector.
5. When installing a telecommunication grounding system, the NEC
requires the grounding electrode to be no less than:
A. 4 feet deep
B. 8 feet deep
C. 12 feet deep
D. 20 feet deep
NEC requires grounding rods to be driven a minimum of 8 feet to
ensure effective earth contact.
6. A digital subscriber line (DSL) uses which part of the telephone
spectrum for upstream data?
A. 0–4 kHz
B. 4–25 kHz
C. 25–138 kHz
D. 138–1104 kHz
Upstream DSL signals typically occupy the lower high-frequency band
above voice band.
7. Which modulation technique is commonly used in QAM to increase
spectral efficiency?
A. ASK
B. FSK
C. QPSK
D. PWM
, Quadrature PSK combines phase and amplitude changes to maximize
bits per symbol.
8. Which cable category supports Gigabit Ethernet over 100 meters?
A. Cat3
B. Cat4
C. Cat5e
D. Cat6a
Cat5e is rated for 1 Gbps over 100 m and is widely deployed.
9. The ratio of the power of a signal to the power of background noise is
called:
A. attenuation
B. dispersion
C. signal-to-noise ratio
D. impedance
SNR measures the relative strength of signal versus noise in a system.
10. A 66 block is most often used for terminating:
A. fiber optic cables
B. coaxial trunk cables
C. twisted-pair voice cables
D. wireless access points
66 blocks are used in traditional telephone wiring for twisted pair
connections.
11. In a microwave point-to-point link, the Fresnel zone clearance is
critical to:
A. adjust the frequency
B. lower the transmit power
C. prevent signal obstruction
D. synchronize clocks
Fresnel zone clearance ensures minimal diffraction and path loss.
12. A telecommunication system using T1 lines transmits at:
A. 512 kbps
B. 1.544 Mbps
C. 10 Mbps
D. 45 Mbps
T1 standard data rate is 1.544 Mbps.
Advanced Specialist Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. A fiber-optic link experiences modal dispersion primarily because of
differences in:
A. core refractive index profile
B. propagation times of various modes
C. optical wavelength fluctuations
D. connector insertion loss
Modal dispersion occurs when different guided modes travel at
different speeds, causing pulse spreading.
2. In a SONET network, the basic transmission rate, STS-1, corresponds to
a bit rate of:
A. 34.368 Mbps
B. 51.84 Mbps
C. 155.52 Mbps
D. 622.08 Mbps
STS-1 carries data at 51.84 Mbps, forming the building block for
higher levels.
3. The primary purpose of a PDH (Plesiochronous Digital Hierarchy)
system is to:
A. multiplex asynchronous channels
B. demodulate RF signals
C. aggregate multiple digital streams into higher bit rates
, D. provide error correction on analog voice
PDH systems combine multiple lower-rate digital signals into a
higher-rate aggregate.
4. A technician testing a coaxial drop using a time domain reflectometer
(TDR) observes a large reflection at 200 meters. This most likely
indicates:
A. correct impedance matching
B. a splice within tolerance
C. a significant impedance discontinuity
D. acceptable attenuation profile
A large TDR reflection indicates a fault such as a break or bad
connector.
5. When installing a telecommunication grounding system, the NEC
requires the grounding electrode to be no less than:
A. 4 feet deep
B. 8 feet deep
C. 12 feet deep
D. 20 feet deep
NEC requires grounding rods to be driven a minimum of 8 feet to
ensure effective earth contact.
6. A digital subscriber line (DSL) uses which part of the telephone
spectrum for upstream data?
A. 0–4 kHz
B. 4–25 kHz
C. 25–138 kHz
D. 138–1104 kHz
Upstream DSL signals typically occupy the lower high-frequency band
above voice band.
7. Which modulation technique is commonly used in QAM to increase
spectral efficiency?
A. ASK
B. FSK
C. QPSK
D. PWM
, Quadrature PSK combines phase and amplitude changes to maximize
bits per symbol.
8. Which cable category supports Gigabit Ethernet over 100 meters?
A. Cat3
B. Cat4
C. Cat5e
D. Cat6a
Cat5e is rated for 1 Gbps over 100 m and is widely deployed.
9. The ratio of the power of a signal to the power of background noise is
called:
A. attenuation
B. dispersion
C. signal-to-noise ratio
D. impedance
SNR measures the relative strength of signal versus noise in a system.
10. A 66 block is most often used for terminating:
A. fiber optic cables
B. coaxial trunk cables
C. twisted-pair voice cables
D. wireless access points
66 blocks are used in traditional telephone wiring for twisted pair
connections.
11. In a microwave point-to-point link, the Fresnel zone clearance is
critical to:
A. adjust the frequency
B. lower the transmit power
C. prevent signal obstruction
D. synchronize clocks
Fresnel zone clearance ensures minimal diffraction and path loss.
12. A telecommunication system using T1 lines transmits at:
A. 512 kbps
B. 1.544 Mbps
C. 10 Mbps
D. 45 Mbps
T1 standard data rate is 1.544 Mbps.
