Texas Electrical Transmission Systems
Compliance Examination Prep | Questions And
Answers With Verified Rationales | 2026/27 Qs
& Ans | Digital Pdf Download
1. What is the primary function of a transmission system?
A. Transport electricity over long distances from generation to distribution
networks
B. Store fuel for generators
C. Treat wastewater
D. Manage building wiring
Answer: A. Transport electricity over long distances from generation to
distribution networks
Rationale: Transmission systems move high-voltage electricity efficiently
across regions.
2. What voltage level is typically associated with transmission lines?
A. High voltage
B. Low voltage only
C. Battery voltage
D. Residential 120V only
© 2026 Academics_Excellence
,Answer: A. High voltage
Rationale: High voltage reduces energy losses over long distances.
3. What is the role of a substation in transmission systems?
A. Step voltage up or down and control power flow
B. Generate electricity
C. Store water
D. Burn fuel
Answer: A. Step voltage up or down and control power flow
Rationale: Substations regulate voltage for efficient transmission and
distribution.
4. What is a step-up transformer used for?
A. Increasing voltage for transmission
B. Decreasing voltage for homes
C. Storing energy
D. Measuring current only
Answer: A. Increasing voltage for transmission
Rationale: Higher voltage reduces current and line losses.
5. What is a step-down transformer used for?
© 2026 Academics_Excellence
,A. Reducing voltage for safe distribution
B. Increasing voltage
C. Disconnecting circuits
D. Measuring resistance
Answer: A. Reducing voltage for safe distribution
Rationale: Lower voltage is needed for consumer use.
6. What is line impedance?
A. Opposition to current flow in transmission lines
B. Fuel resistance
C. Water pressure
D. Mechanical friction only
Answer: A. Opposition to current flow in transmission lines
Rationale: Impedance affects power losses and efficiency.
7. What is transmission line loss primarily caused by?
A. Resistance in conductors
B. Water contamination
C. Mechanical vibration only
D. Fuel leakage
Answer: A. Resistance in conductors
Rationale: Electrical resistance converts energy into heat.
© 2026 Academics_Excellence
, 8. What is corona discharge in transmission lines?
A. Ionization of air around high-voltage conductors
B. Water leakage
C. Mechanical failure
D. Transformer overload
Answer: A. Ionization of air around high-voltage conductors
Rationale: Corona causes energy loss and audible noise.
9. What is sag in transmission lines?
A. Downward curve of conductor due to weight and temperature
B. Voltage increase
C. Current boost
D. Insulation failure only
Answer: A. Downward curve of conductor due to weight and temperature
Rationale: Sag must be controlled for safety and clearance.
10. What is right-of-way in transmission systems?
A. Designated land area for power lines and maintenance access
B. Fuel storage area
C. Water pipeline only
D. Building foundation
© 2026 Academics_Excellence
Compliance Examination Prep | Questions And
Answers With Verified Rationales | 2026/27 Qs
& Ans | Digital Pdf Download
1. What is the primary function of a transmission system?
A. Transport electricity over long distances from generation to distribution
networks
B. Store fuel for generators
C. Treat wastewater
D. Manage building wiring
Answer: A. Transport electricity over long distances from generation to
distribution networks
Rationale: Transmission systems move high-voltage electricity efficiently
across regions.
2. What voltage level is typically associated with transmission lines?
A. High voltage
B. Low voltage only
C. Battery voltage
D. Residential 120V only
© 2026 Academics_Excellence
,Answer: A. High voltage
Rationale: High voltage reduces energy losses over long distances.
3. What is the role of a substation in transmission systems?
A. Step voltage up or down and control power flow
B. Generate electricity
C. Store water
D. Burn fuel
Answer: A. Step voltage up or down and control power flow
Rationale: Substations regulate voltage for efficient transmission and
distribution.
4. What is a step-up transformer used for?
A. Increasing voltage for transmission
B. Decreasing voltage for homes
C. Storing energy
D. Measuring current only
Answer: A. Increasing voltage for transmission
Rationale: Higher voltage reduces current and line losses.
5. What is a step-down transformer used for?
© 2026 Academics_Excellence
,A. Reducing voltage for safe distribution
B. Increasing voltage
C. Disconnecting circuits
D. Measuring resistance
Answer: A. Reducing voltage for safe distribution
Rationale: Lower voltage is needed for consumer use.
6. What is line impedance?
A. Opposition to current flow in transmission lines
B. Fuel resistance
C. Water pressure
D. Mechanical friction only
Answer: A. Opposition to current flow in transmission lines
Rationale: Impedance affects power losses and efficiency.
7. What is transmission line loss primarily caused by?
A. Resistance in conductors
B. Water contamination
C. Mechanical vibration only
D. Fuel leakage
Answer: A. Resistance in conductors
Rationale: Electrical resistance converts energy into heat.
© 2026 Academics_Excellence
, 8. What is corona discharge in transmission lines?
A. Ionization of air around high-voltage conductors
B. Water leakage
C. Mechanical failure
D. Transformer overload
Answer: A. Ionization of air around high-voltage conductors
Rationale: Corona causes energy loss and audible noise.
9. What is sag in transmission lines?
A. Downward curve of conductor due to weight and temperature
B. Voltage increase
C. Current boost
D. Insulation failure only
Answer: A. Downward curve of conductor due to weight and temperature
Rationale: Sag must be controlled for safety and clearance.
10. What is right-of-way in transmission systems?
A. Designated land area for power lines and maintenance access
B. Fuel storage area
C. Water pipeline only
D. Building foundation
© 2026 Academics_Excellence
