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Quiz Leaderboard: 2/20 - 3/22/2018    Sign in to track your quiz score! | Full Leaderboard

  • 1. willem van Gent (22/22 answered correctly)

  • 2. Mark Allen (22/22 answered correctly)

  • 3. Juan I. Ordinas (22/22 answered correctly)

  • 4. Doug Driscoll, Sr. (21/22 answered correctly)

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  • 7. Adam Carter (20/22 answered correctly)

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  • 19. Dave Heyne (19/22 answered correctly)

  • 20. Dustin Smith (18/22 answered correctly)

True or false: Use of crystalline silica sand has now been banned from use as a blasting abrasive in the United States.


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Previous Quizzes from the Past Week

Monday, November 28, 2011
What is the main purpose of lithium silicate in the diamond polishing of concrete?

Wednesday, November 23, 2011
High pressure, supplied-air respirators used for abrasive blasting normally have an Assigned Protection Factor of 25. What does this NIOSH rating mean?

Tuesday, November 22, 2011
What ASTM Committee deals with nuclear coatings?

Monday, November 21, 2011
What infestation has recently caused the fouling of intake structures at hydroelectric facilities in the Southwest?

Friday, November 18, 2011
What are you seeing on this steel surface magnified 100 times?

More previous quizzes
CHLOR*RID International Inc.
Companies that invest in corrosion control use CHLOR RID products
  • Soluble salt removal liquid
  • Test kits to verify contamination levels
  • Surface passivation to hold the blast
INFO@CHLOR-RID.COM 800.422.3217

Graco Inc.
Graco EcoQuip 2: Experience the Difference
While others claim their equipment is the same, none of them compare to Graco’s EcoQuip 2™ Vapor Abrasive® blasting line. Visit to learn more.

Industrial Vacuum Equipment Corp.
Hurricane Vacuums
& Dust Collectors
Vacuum and dust collector hose, filters and related accessories.

SAFE Systems, Inc.
Portable Dust Collectors for Tough Environments
Trailer and skid-mounted models in numerous sizes, powered by electric and/or diesel. Sloped roofs, multiple dust inlets, high static, dampered fans. Lockable power & drive compartments.

HoldTight Solutions Inc.
Our HoldTight®102 salt remover & flash rust
preventer prevents flash
rust by removing surface contaminants. Contact us
for your nearest distributor.
(800) 319.8802

Vector Technologies Ltd.
The Original Performance Proven Vacuum Solutions
VecLoader® 616 Double Dump, Continuous Vacuum, 170 HP w/ 2,400 CFM & 28” Hg. 33% More Efficient than traditional vacuum systems! Choose Vector for the most powerful and the most reliable trailer mounted vacuums in the industry! Email us at: or call us at: 800-832-4010

NLB Corporation
NLB Sure Shroud: Greater Protection and Flexibility
NLB’s Sure Shroud’s lighter weight and flexibility reduces operator fatigue and offers unmatched protection against high pressure hose ruptures. 10k to 40k psi rated.

Novatek Corporation
Dustless Coatings Removal
Novatek Corporation, Dustless Coatings Removal Strip, clean and profile all dust free! Comply with new lead standards. Contact today: (866) 563-7800

ARC / A.W. Chesterton Company
ARC HT-S is a 100% solids glass/ceramic reinforced novolac epoxy lining for high temperature aqueous cold wall corrosion conditions. ARC HT-S is easily applied by roller, brush, squeegee, or airless spray.

SABRE Autonomous Solutions
The ALPHA1 provides a consistent finish day-in
day-out; job to job.


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