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100+ Free AL Power Projects Plants Practice Questions

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2026 Statistics

Key Facts: AL Power Projects Plants Exam

70%

Passing Score

PSI AL GC Bulletin

50 Q

Official Exam Questions

PSI AL GC Bulletin

2 hours

Time Allowed

PSI AL GC Bulletin

$96

PSI Exam Fee

PSI AL GC Bulletin

Open book

Exam Format

PSI AL GC Bulletin

Alabama AL Power Projects Plants trade exam via PSI: 50 questions, 70% pass, 2 hours, fee $96. Open-book specialty classification under the Alabama Licensing Board for General Contractors (bulletin 1/23/26).

Sample AL Power Projects Plants Practice Questions

Try these sample questions to test your AL Power Projects Plants exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In an ideal transformer, the primary-to-secondary voltage ratio is equal to which quantity?
A.The primary-to-secondary turns ratio (Np/Ns)
B.The primary-to-secondary current ratio (Ip/Is)
C.The square of the turns ratio
D.The product of primary and secondary turns
Explanation: For an ideal transformer, Vp/Vs = Np/Ns. Voltage scales with the number of turns. Current scales inversely with turns so that primary and secondary power remain approximately equal (neglecting losses).
2A single-phase transformer has 2,400 primary turns and 240 secondary turns. With 2,400 V on the primary, the secondary voltage is approximately:
A.240 V
B.24 V
C.2,400 V
D.24,000 V
Explanation: Vs = Vp × (Ns/Np) = 2,400 × (240/2,400) = 240 V. This is a 10:1 step-down transformer commonly used on distribution secondaries.
3For an ideal transformer with turns ratio Np:Ns = 4:1 and primary current of 25 A, secondary current is approximately:
A.100 A
B.25 A
C.6.25 A
D.50 A
Explanation: Ideal power balance gives Is ≈ Ip × (Np/Ns) = 25 × 4 = 100 A. Current steps up when voltage steps down.
4What is the primary purpose of a power transformer on a utility distribution system?
A.To change voltage levels for efficient transmission and usable service voltages
B.To convert AC to DC for customer motors
C.To generate power from magnetic fields alone without a source
D.To replace the need for system grounding
Explanation: Transformers step voltage up for bulk transfer and down for distribution and utilization. They do not create energy; they transfer AC power magnetically between circuits.
5Nameplate kVA on a three-phase power transformer rates the unit based on:
A.Apparent power capability under stated temperature-rise and cooling conditions
B.Real power only (kW) at unity power factor forever
C.Motor horsepower delivered to the load
D.Peak short-circuit current for one cycle
Explanation: Transformer kVA is an apparent-power thermal rating at the nameplate temperature rise and cooling class (for example ONAN). Available real power also depends on load power factor and ambient conditions.
6Percent impedance (%Z) on a transformer nameplate is most useful for estimating:
A.Available short-circuit current and voltage regulation characteristics
B.No-load iron loss only
C.Exact oil dielectric strength in kV
D.Bushing creepage distance
Explanation: %Z relates rated voltage to the voltage needed to circulate rated current with the secondary shorted. Higher %Z generally lowers available fault current and increases voltage drop under load.
7When paralleling two power transformers on the same bus, a critical matching requirement is that they have:
A.Compatible voltage ratios, phase displacement (vector group), and similar percent impedances
B.Identical manufacturing dates only
C.Different primary voltages by at least 20%
D.Opposite polarity markings only with no other checks
Explanation: Successful paralleling requires matching turns ratios (voltage), angular displacement, and sufficiently similar %Z so circulating currents and unequal load sharing stay within limits. Polarity/vector group must agree for three-phase units.
8A delta-wye distribution transformer bank is commonly used because it can:
A.Provide a grounded neutral on the secondary wye for line-to-neutral loads
B.Eliminate the need for any primary fuses or protection
C.Convert three-phase power into pure DC
D.Double system frequency
Explanation: Delta-wye banks supply a secondary neutral for 120/208 V or similar multi-wire services while isolating the primary from secondary ground faults. Primary protection and proper grounding design remain required.
9Instrument current transformers (CTs) are primarily used to:
A.Step high primary currents down to standardized secondary currents for meters and relays
B.Step secondary currents up to transmission levels
C.Provide plant station-service power for lighting
D.Replace power-factor capacitors
Explanation: CTs produce a proportional low secondary current (often 5 A or 1 A rated) so metering and protective relays can safely measure primary current without carrying full line current.
10Before working on a CT secondary circuit that is still energized on the primary, workers must:
A.Never open the CT secondary under load without a shorting path; short or reconnect before opening
B.Open the secondary freely because CTs are harmless
C.Ground only one secondary lead and leave the other floating permanently
D.Bypass all CT secondary fuses with bare wire as standard practice
Explanation: An open CT secondary with primary current flowing can develop dangerous high voltage. Standard practice is to short the secondary (or use shorting blocks) before disconnecting instruments or relays.

About the AL Power Projects Plants Exam

The Alabama Power Projects and Plants Contractor Examination is a classification trade examination administered by PSI for the Alabama Licensing Board for General Contractors. The official open-book exam has 50 questions, a 70% (35 of 50 correct) passing standard, and 120 minutes allowed. PSI examination fee is $96 per attempt (bulletin updated 1/23/26). This English-language MCQ bank is a study aid for the trade knowledge on the official content outline; it is not an official PSI form, does not replace the required Business & Law exam for primes, and is not a substitute for board-approved experience or the official open-book examination.

Questions

50 scored questions

Time Limit

120 minutes

Passing Score

70%

Exam Fee

$96 (PSI Services LLC (for Alabama Licensing Board for General Contractors))

AL Power Projects Plants Exam Content Outline

20%

Equipment and Safety

Power project equipment and safety

16%

Conductors

Power conductors

12%

Transformers

Transformer installation

12%

Electrical Knowledge

Power electrical theory

10%

Overhead Lines

Overhead line construction

8%

Grounding Methods

System grounding

6%

Underground Lines

Underground power lines

6%

Poles and Structures

Poles and structures

6%

Electric Supply Stations

Supply stations

4%

Service Drops and Laterals

Service drops and laterals

How to Pass the AL Power Projects Plants Exam

What You Need to Know

  • Passing score: 70%
  • Exam length: 50 questions
  • Time limit: 120 minutes
  • Exam fee: $96

Keys to Passing

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

AL Power Projects Plants Study Tips from Top Performers

1Study only the approved references listed for your classification in the current PSI Alabama General Contractors bulletin
2Practice open-book navigation with permanent tabs and indexes before test day
3Drill OSHA 29 CFR 1926 topics that appear across nearly every trade outline
4Work quantity takeoff and plan-reading problems under timed conditions
5Confirm Board eligibility and classification scope on genconbd.alabama.gov before scheduling with PSI

Frequently Asked Questions

How many questions are on the AL Power Projects Plants exam?

The official PSI trade examination has 50 scored questions (plus possible experimental items). Passing is 70% (35 of 50 correct) within 120 minutes.

How much does the AL Power Projects Plants exam cost?

PSI lists $96 per examination registration for this Alabama general contractor classification exam (Candidate Information Bulletin updated 1/23/26). License application fees to the Board are separate.

Is the Alabama specialty contractor exam open book?

Yes. PSI administers these classification exams as open book. Only the bulletin-listed approved references are allowed; temporary tabs like Post-it notes are prohibited.

Do I still need the Business and Law exam?

Prime contractor applicants must also pass the Alabama Business & Law examination (50 questions, 70%, 120 minutes). Reciprocity may waive a trade exam in some cases but does not waive Business & Law.