Alaska Skilled Trades & Construction
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A Instant Download Pdf
1. In Alaska construction, which factor most directly affects the required
design of foundations in areas subject to permafrost?
A. Average annual rainfall
B. Soil thermal conditions and frost behavior
C. Distance from the nearest highway
D. Exterior paint color
Answer: B. Soil thermal conditions and frost behavior
Rationale: Foundation performance in permafrost regions depends heavily on
ground temperature, thaw settlement potential, frost action, and the method
used to keep the supporting soil stable.
2. When working on an energized electrical circuit, what is the safest general
practice?
A. Work quickly to minimize exposure
B. Use insulated pliers only
C. De-energize, lock out, and verify absence of voltage whenever feasible
D. Wear leather gloves and proceed
Answer: C. De-energize, lock out, and verify absence of voltage whenever
feasible
,Rationale: De-energization eliminates the electrical hazard. Lockout/tagout and
verification prevent unexpected energization and confirm that the circuit is
actually dead.
3. What is the primary purpose of a construction-site fall-protection system?
A. Increase worker productivity
B. Prevent or reduce injuries from falls
C. Reduce material waste
D. Improve building appearance
Answer: B. Prevent or reduce injuries from falls
Rationale: Fall-protection systems are intended to prevent workers from falling
or minimize the consequences if a fall occurs.
4. Which tool is most appropriate for checking whether a concrete slab is
level?
A. Torpedo level only
B. Laser level
C. Pipe wrench
D. Framing square
Answer: B. Laser level
Rationale: A laser level can establish accurate horizontal reference lines over
substantial distances and is particularly useful for checking elevations across a
large slab.
5. What is the primary purpose of reinforcing steel in structural concrete?
A. Prevent all cracking
B. Increase tensile capacity
C. Reduce concrete weight
D. Replace aggregate
Answer: B. Increase tensile capacity
,Rationale: Concrete performs well in compression but poorly in tension.
Reinforcing steel provides tensile resistance and helps control cracking.
6. Which condition is most likely to cause differential settlement beneath a
building?
A. Uniformly compacted soil
B. Uniform foundation loading
C. Variable soil conditions beneath the structure
D. Proper drainage
Answer: C. Variable soil conditions beneath the structure
Rationale: Differences in soil strength, moisture, density, or composition can
cause different portions of a structure to settle at different rates.
7. What is the principal purpose of a vapor retarder in a building assembly?
A. Increase structural strength
B. Control moisture vapor movement
C. Replace insulation
D. Improve electrical grounding
Answer: B. Control moisture vapor movement
Rationale: Vapor retarders limit moisture vapor diffusion through building
assemblies and can help reduce condensation-related problems when properly
located.
8. Before operating a portable power tool, the worker should first:
A. Remove the guard
B. Inspect the tool and power cord
C. Increase the tool speed
D. Lubricate every component
Answer: B. Inspect the tool and power cord
, Rationale: Inspection identifies damaged cords, missing guards, defective
switches, and other hazards before the tool is placed into service.
9. Which type of fitting is normally used to change the direction of a pipe run?
A. Coupling
B. Union
C. Elbow
D. Reducer
Answer: C. Elbow
Rationale: Elbows are manufactured specifically to redirect piping, commonly at
45- or 90-degree angles.
10.What is the primary function of a circuit breaker?
A. Increase circuit voltage
B. Protect against excessive current
C. Store electrical energy
D. Improve power factor automatically
Answer: B. Protect against excessive current
Rationale: Circuit breakers interrupt current when an overcurrent condition
occurs, helping protect conductors and equipment from overheating and
damage.
11.Why is proper compaction of structural fill important?
A. It increases soil settlement
B. It reduces soil density
C. It improves load-bearing performance and limits settlement
D. It eliminates the need for drainage
Answer: C. It improves load-bearing performance and limits settlement
Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A Instant Download Pdf
1. In Alaska construction, which factor most directly affects the required
design of foundations in areas subject to permafrost?
A. Average annual rainfall
B. Soil thermal conditions and frost behavior
C. Distance from the nearest highway
D. Exterior paint color
Answer: B. Soil thermal conditions and frost behavior
Rationale: Foundation performance in permafrost regions depends heavily on
ground temperature, thaw settlement potential, frost action, and the method
used to keep the supporting soil stable.
2. When working on an energized electrical circuit, what is the safest general
practice?
A. Work quickly to minimize exposure
B. Use insulated pliers only
C. De-energize, lock out, and verify absence of voltage whenever feasible
D. Wear leather gloves and proceed
Answer: C. De-energize, lock out, and verify absence of voltage whenever
feasible
,Rationale: De-energization eliminates the electrical hazard. Lockout/tagout and
verification prevent unexpected energization and confirm that the circuit is
actually dead.
3. What is the primary purpose of a construction-site fall-protection system?
A. Increase worker productivity
B. Prevent or reduce injuries from falls
C. Reduce material waste
D. Improve building appearance
Answer: B. Prevent or reduce injuries from falls
Rationale: Fall-protection systems are intended to prevent workers from falling
or minimize the consequences if a fall occurs.
4. Which tool is most appropriate for checking whether a concrete slab is
level?
A. Torpedo level only
B. Laser level
C. Pipe wrench
D. Framing square
Answer: B. Laser level
Rationale: A laser level can establish accurate horizontal reference lines over
substantial distances and is particularly useful for checking elevations across a
large slab.
5. What is the primary purpose of reinforcing steel in structural concrete?
A. Prevent all cracking
B. Increase tensile capacity
C. Reduce concrete weight
D. Replace aggregate
Answer: B. Increase tensile capacity
,Rationale: Concrete performs well in compression but poorly in tension.
Reinforcing steel provides tensile resistance and helps control cracking.
6. Which condition is most likely to cause differential settlement beneath a
building?
A. Uniformly compacted soil
B. Uniform foundation loading
C. Variable soil conditions beneath the structure
D. Proper drainage
Answer: C. Variable soil conditions beneath the structure
Rationale: Differences in soil strength, moisture, density, or composition can
cause different portions of a structure to settle at different rates.
7. What is the principal purpose of a vapor retarder in a building assembly?
A. Increase structural strength
B. Control moisture vapor movement
C. Replace insulation
D. Improve electrical grounding
Answer: B. Control moisture vapor movement
Rationale: Vapor retarders limit moisture vapor diffusion through building
assemblies and can help reduce condensation-related problems when properly
located.
8. Before operating a portable power tool, the worker should first:
A. Remove the guard
B. Inspect the tool and power cord
C. Increase the tool speed
D. Lubricate every component
Answer: B. Inspect the tool and power cord
, Rationale: Inspection identifies damaged cords, missing guards, defective
switches, and other hazards before the tool is placed into service.
9. Which type of fitting is normally used to change the direction of a pipe run?
A. Coupling
B. Union
C. Elbow
D. Reducer
Answer: C. Elbow
Rationale: Elbows are manufactured specifically to redirect piping, commonly at
45- or 90-degree angles.
10.What is the primary function of a circuit breaker?
A. Increase circuit voltage
B. Protect against excessive current
C. Store electrical energy
D. Improve power factor automatically
Answer: B. Protect against excessive current
Rationale: Circuit breakers interrupt current when an overcurrent condition
occurs, helping protect conductors and equipment from overheating and
damage.
11.Why is proper compaction of structural fill important?
A. It increases soil settlement
B. It reduces soil density
C. It improves load-bearing performance and limits settlement
D. It eliminates the need for drainage
Answer: C. It improves load-bearing performance and limits settlement
