Exam Questions And Correct Answers

D91 Structural Moving Contractor Exam Questions And Correct Answers (Verified Answers) Plus Rationale2026 Q&A| Instant Download Pdf

• What is the primary purpose of underpinning in structural moving?
• To decorate the foundation
• To strengthen or support an existing foundation
• To waterproof a structure
• To install new plumbing

Rationale: Underpinning is used to strengthen or stabilize an existing

foundation before moving or lifting a structure.

• Which type of beam is most commonly used to support a house during

a move?

• Aluminum I-beam
• Concrete T-beam
• Steel I-beam
• Wooden joist

Rationale: Steel I-beams are strong, durable, and can support heavy loads

during structural moves.

• What is the first step in preparing a building for relocation?
• Disconnect utilities
• Remove landscaping
• Perform a structural assessment
• Obtain permits 1 / 3

Rationale: A structural assessment identifies potential weaknesses and

ensures safe lifting and moving.

• Which permit is typically required before moving a structure on public

roads?

• Plumbing permit
• Electrical permit
• Transportation or moving permit
• Building permit

Rationale: Moving a structure on public roads requires a transportation

permit specifying route, timing, and safety measures.

• Which of the following is essential for a hydraulic jacking system?
• Water supply
• High-pressure hydraulic fluid
• Electrical wiring
• Compressed air only

Rationale: Hydraulic jacks rely on high-pressure hydraulic fluid to lift

heavy structures safely.

• When lifting a house, why are cribbing blocks used?
• To replace the foundation
• To temporarily support the structure while elevated
• To level the interior floors
• To insulate the basement

Rationale: Cribbing provides stable, temporary support under the structure

during lifting.

• Which type of soil provides the best support for moving a structure?
• Loose sand
• Peat
• Clay prone to swelling
• Compact, well-drained soil

Rationale: Compact, well-drained soil reduces the risk of settling or

shifting during the move. 2 / 3

• What is the primary purpose of a pilot car during structural relocation?
• To load materials
• To warn and guide traffic along the route
• To measure foundation strength
• To operate hydraulic jacks

Rationale: Pilot cars alert traffic and help ensure safe passage of oversized

structures.

• Which tool is commonly used to cut steel beams for structural moving?
• Hacksaw
• Oxy-acetylene torch
• Wood chisel
• Jigsaw

Rationale: Oxy-acetylene torches can efficiently cut through steel beams

used in structural support.

• What is a critical factor when selecting a route for a house move?
• Proximity to restaurants
• Height and width clearances
• Soil fertility
• Property taxes

Rationale: Ensuring adequate clearance for bridges, overhead wires, and

road width is vital for safe transportation.

• Which of the following is required when lifting a multi-story

building?

• Only one hydraulic jack
• Multiple synchronized hydraulic jacks
• Wooden wedges only
• Concrete piers

Rationale: Multiple jacks must be synchronized to lift evenly and prevent

structural damage.

• Which factor determines the number of jacks needed to lift a

structure?

• / 3