Tennessee Power Systems Engineer 2026 Exam
Practice: 180 Questions Covering Business Law,
Contractor Licensing, Power Systems,
Protection, Transmission, and Distribution with
Verified Answers and Rationales
📝 Sample Exam Questions & Rationales
Section 1: Business & Law
Q1: A contractor in Tennessee is required to hold a
state license before bidding on or negotiating a
price for a project where the total cost (including
materials and labor) is:
• A. $5,000 or more
• B. $15,000 or more
• C. $25,000 or more
• D. $50,000 or more
Correct ☑VERIFIED ANSWER: C. $25,000 or more
Rationale: In Tennessee, a contractor's license is
required for projects with a total cost of $25,000 or
,more. This applies to prime contractors and
subcontractors in trades like electrical work .
Q2: Which two exams must an applicant typically
pass to obtain a contractor's license in Tennessee?
• A. The "Tennessee Business and Law" exam and
an applicable "Trade" exam
• B. The "Tennessee Safety and Health" exam and
an "Environmental" exam
• C. The "National Electrical Code (NEC)" exam
and the "OSHA 10" exam
• D. The "NASCLA" exam and the "Engineering
Ethics" exam
Correct ☑VERIFIED ANSWER: A. The "Tennessee
Business and Law" exam and an applicable "Trade"
exam
Rationale: All new applicants for a contractor
license in Tennessee must pass the "Tennessee
Business and Law" exam. Depending on the license
,classification, they may also be required to pass a
corresponding "Trade" exam .
Section 2: Power Systems Trade
Q3: A large AC generator supplying power to an
infinite bus experiences a sudden short circuit at its
terminals. The initial high current surge is primarily
limited by the generator's:
• A. Field resistance
• B. Subtransient reactance (X"d)
• C. Synchronous reactance (Xd)
• D. Transient reactance (X'd)
Correct ☑VERIFIED ANSWER: B. Subtransient
reactance (X"d)
Rationale: During the first few cycles of a short
circuit, the generator's current is limited by its
subtransient reactance, which is the lowest of the
reactance values, resulting in the highest possible
current .
, Q4: In a large interconnected electrical power
system, which of the following best describes the
primary purpose of the transmission system?
• A. To convert electrical energy into mechanical
energy for industrial use
• B. To distribute low-voltage electricity directly to
residential consumers
• C. To transport electrical power over long
distances from generation plants to substations
• D. To regulate voltage at the consumer level
Correct ☑VERIFIED ANSWER: C. To transport
electrical power over long distances from
generation plants to substations
Rationale: The transmission system is responsible
for carrying electrical energy over long distances
from generation stations to substations before
distribution, ensuring efficient bulk power transfer .
Q5: A power systems engineer is evaluating the
advantages of using high voltage in transmission
Practice: 180 Questions Covering Business Law,
Contractor Licensing, Power Systems,
Protection, Transmission, and Distribution with
Verified Answers and Rationales
📝 Sample Exam Questions & Rationales
Section 1: Business & Law
Q1: A contractor in Tennessee is required to hold a
state license before bidding on or negotiating a
price for a project where the total cost (including
materials and labor) is:
• A. $5,000 or more
• B. $15,000 or more
• C. $25,000 or more
• D. $50,000 or more
Correct ☑VERIFIED ANSWER: C. $25,000 or more
Rationale: In Tennessee, a contractor's license is
required for projects with a total cost of $25,000 or
,more. This applies to prime contractors and
subcontractors in trades like electrical work .
Q2: Which two exams must an applicant typically
pass to obtain a contractor's license in Tennessee?
• A. The "Tennessee Business and Law" exam and
an applicable "Trade" exam
• B. The "Tennessee Safety and Health" exam and
an "Environmental" exam
• C. The "National Electrical Code (NEC)" exam
and the "OSHA 10" exam
• D. The "NASCLA" exam and the "Engineering
Ethics" exam
Correct ☑VERIFIED ANSWER: A. The "Tennessee
Business and Law" exam and an applicable "Trade"
exam
Rationale: All new applicants for a contractor
license in Tennessee must pass the "Tennessee
Business and Law" exam. Depending on the license
,classification, they may also be required to pass a
corresponding "Trade" exam .
Section 2: Power Systems Trade
Q3: A large AC generator supplying power to an
infinite bus experiences a sudden short circuit at its
terminals. The initial high current surge is primarily
limited by the generator's:
• A. Field resistance
• B. Subtransient reactance (X"d)
• C. Synchronous reactance (Xd)
• D. Transient reactance (X'd)
Correct ☑VERIFIED ANSWER: B. Subtransient
reactance (X"d)
Rationale: During the first few cycles of a short
circuit, the generator's current is limited by its
subtransient reactance, which is the lowest of the
reactance values, resulting in the highest possible
current .
, Q4: In a large interconnected electrical power
system, which of the following best describes the
primary purpose of the transmission system?
• A. To convert electrical energy into mechanical
energy for industrial use
• B. To distribute low-voltage electricity directly to
residential consumers
• C. To transport electrical power over long
distances from generation plants to substations
• D. To regulate voltage at the consumer level
Correct ☑VERIFIED ANSWER: C. To transport
electrical power over long distances from
generation plants to substations
Rationale: The transmission system is responsible
for carrying electrical energy over long distances
from generation stations to substations before
distribution, ensuring efficient bulk power transfer .
Q5: A power systems engineer is evaluating the
advantages of using high voltage in transmission
