Exam 100 Practice Questions And

Waterproofing Technician Certification Exam 100 Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the primary purpose of waterproofing in construction?
• Improve aesthetics
• Reduce thermal conductivity
• Protect structures from water intrusion
• Strengthen structural members
• Protect structures from water intrusion

Rationale: Waterproofing prevents moisture penetration that can damage

structural and interior components.

• Which membrane type is commonly torch-applied?

A. PVC

B. TPO 1 / 4

C. EPDM

• Modified bitumen
• Modified bitumen

Rationale: Torch application is standard for modified bitumen membranes.

• Which test measures concrete moisture vapor emission rate?
• Blaine test
• Calcium chloride test
• Slump test
• Compression test
• Calcium chloride test

Rationale: This test quantifies moisture vapor emission from concrete

slabs.

• A below-grade foundation wall requires which waterproofing approach?
• Surface sealer only
• Vapor retarder only
• Continuous membrane with drainage
• Interior paint coating
• Continuous membrane with drainage

Rationale: Below-grade areas must combine waterproofing with drainage

to control hydrostatic pressure.

• Which membrane is fully adhered using solvent-based adhesive? 2 / 4

A. EPDM

• Bentonite
• Hot-applied rubberized asphalt
• Polyurethane foam

A. EPDM

Rationale: EPDM sheets are commonly bonded with solvent-based or

water-based adhesives.

6. Hydrostatic pressure occurs when:

• Water evaporates rapidly
• Soil dries out
• Groundwater pushes against the structure
• Air pressure exceeds water pressure
• Groundwater pushes against the structure

Rationale: Hydrostatic pressure results from standing water exerting force

on a structure.

• Which material expands when hydrated and is used for self-sealing

applications?

• Acrylic
• Bentonite
• Silicone
• Polysulfide
• Bentonite

Rationale: Bentonite clay swells when wet, sealing gaps automatically. 3 / 4

8. A key advantage of liquid-applied membranes is:

• Requires heat for installation
• Automatically forms seams
• Seamless application
• Only usable indoors
• Seamless application

Rationale: Liquid membranes cure as a continuous, joint-free barrier.

• What is the minimum recommended slope for a low-slope roof?
• 0%

B. 0.25:12

C. 0.5:12

D. 2:12

C. 0.5:12

Rationale: A minimum slope of 0.5:12 ensures proper drainage.

• Which instrument detects leaks in roofing systems?
• Refractometer
• Moisture meter
• Thermometer
• Tensiometer
• Moisture meter

Rationale: Moisture meters measure trapped moisture to identify leak

paths.

• / 4