Contractor Exam Questions And

CA D34 Prefabricated Equipment Contractor Exam Questions And Correct Answers (Verified Answers) Plus Rationale2026 Q&A| Instant Download Pdf

• Which material is most commonly used for prefabricated steel

structures?

• Aluminum
• Mild steel
• Copper
• Plastic

Answer: Mild steel

Rationale: Mild steel is preferred due to its high strength, durability,

and ease of fabrication, making it ideal for prefabricated equipment.

• What is the primary advantage of using prefabricated equipment on

construction sites?

• Requires more skilled labor
• Reduces on-site construction time
• Higher transportation costs
• Limited design flexibility

Answer: Reduces on-site construction time

Rationale: Prefabrication allows components to be manufactured off-

site, which accelerates construction and improves quality control.

• Which standard is commonly used for structural steel prefabrication?

A. ISO 9001

B. ASTM A36

C. OSHA 1910 1 / 3

D. IEC 61000

Answer: ASTM A36

Rationale: ASTM A36 specifies requirements for carbon steel used in

structural applications, widely adopted in prefabricated equipment.

• When transporting large prefabricated modules, the main consideration

is:

• Color of the module
• Weight and dimensions
• Shape of nearby trees
• Type of on-site lighting

Answer: Weight and dimensions

Rationale: Transportation must account for module size and weight to

comply with road regulations and prevent damage.

• Which welding technique is commonly used in prefabrication?
• Spot welding only
• MIG/TIG welding
• Resistance welding only
• Glue bonding

Answer: MIG/TIG welding

Rationale: MIG and TIG welding provide strong, precise welds

suitable for prefabricated steel components.

• What is the main function of a QA/QC plan in prefabrication?
• Increase labor cost
• Ensure quality and compliance with standards
• Reduce material strength
• Lengthen project timeline

Answer: Ensure quality and compliance with standards

Rationale: A QA/QC plan ensures all components meet design and

regulatory requirements before delivery.

7. Prefabricated concrete panels are typically reinforced with:

• Wood fibers
• Steel rebar
• Plastic mesh
• Aluminum sheets

Answer: Steel rebar

Rationale: Steel reinforcement enhances the tensile strength of

concrete panels, preventing cracking and failure. 2 / 3

• Which factor most affects prefabrication design?
• Local traffic
• Site load requirements
• Paint color
• Site holidays

Answer: Site load requirements

Rationale: Load calculations dictate the size, thickness, and structural

integrity of prefabricated components.

• Which safety measure is critical during lifting of prefabricated

modules?

• Wearing casual clothes
• Using wooden poles only
• Proper rigging and certified lifting equipment
• Painting the module before lifting

Answer: Proper rigging and certified lifting equipment

Rationale: Incorrect lifting can cause accidents; certified rigging

ensures safe handling of heavy prefabricated units.

• What is a common method for joining prefabricated metal

panels?

• Adhesive only
• Bolting or welding
• Taping
• Nailing

Answer: Bolting or welding

Rationale: Bolts allow for easy assembly/disassembly, while welding

provides permanent joints.

• Which environmental factor can affect prefabricated equipment

storage?

• Traffic lights
• Humidity and temperature
• Color of the paint
• Type of site office

Answer: Humidity and temperature

Rationale: Steel and concrete components can corrode or crack if

exposed to extreme moisture or temperature without protection.

• Prefabricated equipment reduces which of the following?
• Need for design approval
• / 3