PaintSquare.com
Follow us on Twitter Follow us on LinkedIn Like us on Facebook Follow us on Instagram Visit the TPC Store
Search the site

 

 

Daily Quiz (125)


Which one of the following agricultural materials is typically not used to create abrasives for blasting?


True or false: Abrasive blast workers are regularly exposed to noise levels of 90-100 decibels.


True or false: In a laboratory study of zinc-rich primers for marine environments, recently reported in JPCL, coatings applied over surface preparation by UHP waterjetting, even though it produced no roughness, achieved performance equivalent to, or better than, that achieved by abrasive blasting.


True or false: When using steel abrasive for blast cleaning, the initial condition of steel has no effect on the end condition after cleaning.


When dust particles escape a containment structure during abrasive blasting, what are they likely to be called?


In protective coatings work the word “embedment” refers to what, according to SSPC?


True or false: A wet blasting system requires water pressure to provide a cleaning force.


Where is silica found in the coatings industry?


True or false: Abrasive blast workers are regularly exposed to noise in excess of 120 dBA.


The standard ISO8501, the international standard for dry abrasive blasting, describes results of four degrees of blast cleaning, Sa 1, Sa 2, Sa 21/2 and Sa 3. What does the Sa stand for, according to a PaintSquare blog?


Which of the following ISO 8501-1 standards is equivalent to SSPC-SP 6, Commercial Blast?


SSPC publishes visual standards for what cleaning method?


True or false: According to a JPCL article on achieving peak performance from abrasives, the easiest way to adjust profile height in the field is by changing the velocity of the abrasive.


True or false: In an air abrasive blasting operation, if you change from a sand abrasive with a specific gravity of 2 to a garnet abrasive with a specific gravity of 4, you should expect an increase in cleaning rate.


True or false: During abrasive blasting operations inside containment in cold weather, dust collection may pull heat out of the containment structure as fast as it is being put in by heating equipment.


What is the name for an abrasive’s resistance to breakdown on impact?


True or false: The photographic guides developed by SSPC to aid in the assessment of surface cleanliness were designed to be used with a hand-held magnifying glass when examining blast-cleaned steel and comparing it with the VIS-1 photos?


If SSPC-SP 16 is specified to prepare architectural aluminum for recoating, what blast pressure should be used?


True or false: Abrasive fines are debris found in blasting abrasive.


Abrasive blast cleaning to remove lead-based paint is governed by what EPA regulation?


True or false: When mill scale is removed from steel by abrasive blasting, the steel begins to rust.


True or false: Abrasive used for abrasive blast cleaning to remove rust and mill scale should have a Mohs hardness of 1.


What makes crushed glass a “green” abrasive, according to the JPCL article, “What is a Green Abrasive?”


In a centrifugal wheel blast machine, what is another name for “operating mix?"


True or false: Air abrasive blast workers are regularly exposed to noise in excess of 120 dBA.


True or false: SSPC-SP 10 is the most rigorous degree of cleaning steel by abrasive blasting.


True or false: Corn cobs, walnut shells, and olivine are used to make blast abrasives classified as agricultural.


True or false: According to SSPC-SP 16, “Brush-Off Blast Cleaning of Coated and Uncoated Galvanized Steel, Stainless Steels, and Non-Ferrous Metals,” blast cleaning of architectural aluminum should be conducted at pressures lower than the pressure normally used to clean carbon steel (90 to 100 psi).


True or false: Both General Industry and Construction Industry standards promulgated by OSHA require that abrasive blasting respirators be worn during abrasive blasting operations.


True or false: In air abrasive blasting operations, the same particle size mix of silica sand and coal slag yield the same profile ranges on steel.


SSPC’s new wet abrasive blast cleaning standards describe how many levels of flash rust following wet blast cleaning?


According to a surface preparation study reported recently in JPCL, abrasive size was found to be a primary driver in the resultant surface profile depth and peak density of blasted steel surfaces.


A White Metal Blast, SSPC-SP 5, allows what to remain on the surface of steel after blast cleaning?


What is a typical particle speed for abrasive in an air abrasive blast system that utilizes a venturi nozzle?


What happens to carbon steel when it loses its oxide layer, millscale, in the abrasive blasting process?


True or false: In an air abrasive blasting system, the blast hose ID should be at least 3-4 times the size of the nozzle orifice to achieve productive blasting results.


What is the ideal pressure at the nozzle of an air abrasive blast system to achieve maximum productivity in the cleaning of steel?


Abrasive blast cleaning to remove lead-based paint is governed by what EPA regulation?


True or false: One kind of wet blasting system uses air pressure rather than water pressure as the cleaning force.


True or false: Abrasive particles in an efficient air abrasive blast system typically travel at a speed of 100 miles per hour.


True or false: Elastomeric coatings are easier to remove by blast cleaning than brittle coatings.


True or false: With the ISO blast cleaning standards, the visual standards are an integral part of the written standard; that is, the reference to the applicable pictures is part of the written description.


SSPC-SP 10 allows staining to remain on how much of each unit area of the steel surface being cleaned?


True or false: Some portable shot blast machines utilize a centrifugal wheel blasting apparatus.


How do you determine the particle size distribution of abrasive material used for blast cleaning?


True or false: The appearance of steel after blast cleaning is affected by the type of abrasive used, among other factors.


True or false: Dry ice pellets used as abrasive cannot produce a profile on steel.


True or false: SSPC has a blast cleaning standard for non-ferrous metals such as architectural aluminum.


Breathing grade compressed air (Grade D, as specified by the Compressed Gas Association) must contain what percentage of oxygen by volume?


What do the terms “working mix” and “operating mix” refer to?


What is normally meant by the phrase, “hold the blast?”


True or false: A wet blast system can use air pressure, rather than water pressure, as the cleaning force.


True or false: Both wet and dry ice have been used as abrasives in abrasive blasting operations.


True or false: Abrasive blast particles in an air abrasive blast system using a venture nozzle can achieve speeds of 450 mph or higher.


True or false: Centrifugal blast cleaning can be both portable and stationary.


True or false: Steel cleaned by abrasive blasting to a condition of SSPC-SP 5, White Metal Blast Cleaning, can look different from job to job.


True or false: No stains of rust, mill scale, or old coatings are allowed after abrasive blast cleaning to SSPC-SP 5.


What organization issued the 2006 publication Abrasive Blasting Hazards in Shipyard Employment?


True or false: Agricultural blast cleaning abrasives are made from walnut shells, corn cobs, and peach pits, among others.


Olivine is what type of blasting abrasive?


True or false: OSHA has developed three sets of regulations on abrasive blasting in three primary industries: general industry, maritime, and construction.


What name is usually given to blasting abrasive residue that has been broken down into a powder?


What is the name of a blast cleaning abrasive manufactured by fusing the mineral bauxite at high temperature?


What type of respiratory protection is required for air abrasive blasting?


True or false: In a JPCL article describing a study about surface preparation of repair mortars in wastewater treatment plants, the authors concluded that broom finishing was superior to abrasive blasting in producing surfaces for the successful application of protective coatings.


In abrasive blasting work, how small do dust particles have to be to make them respirable?


True or false: The speed of abrasive exiting a venture nozzle in an efficient air abrasive blasting system is typically about 200 mph.


True or false: OSHA now forbids the use of silica sand as a blasting abrasive.


SSPC-VIS 1, now called Guide and Reference Photographs for Steel Surfaces Prepared by Dry Abrasive Blast Cleaning, was originally produced by what other standards organization?


What is the name for an abrasive’s resistance to breakdown on impact?


Centrifugal wheels are used in what kind of equipment?


What is another name for the portable stylus instrument used to measure surface roughness of blast-cleaned steel?


Respirators must be approved for use by what organization?


In what kind of work do you hear the term, “operating mix?”


What is the source of potential inhalation hazards that blasters face in air abrasive blasting operations?


True or False: A low-pressure, low-impact abrasive blasting process using a blend of walnut shells and staurolite sand has been developed for cleaning architectural sheet metals and other substrates.


True or False: In August this year, OSHA issued a proposed rule banning use of crystalline silica as a blasting abrasive.


Why is crystalline silica sand more likely to cause silicosis when it is used for abrasive blasting, as opposed to when it blows around on a beach?


What is the typical range for the peak-to-valley height of surface profile created on steel by power-tool cleaning to bare metal or abrasive-blast cleaning?


Surface roughness and peak count of abrasive-blasted steel are the subject of what SSPC standard?


True or false: OSHA’s 2008 National Emphasis Program on Crystalline Silica explicitly identified abrasive blast cleaning as a high-exposure activity.


True or False: OSHA has lowered the permissible exposure limits on crystalline silica.


True or false: The number of peaks in a steel surface profile created by abrasive blast cleaning has no effect on coating performance.


True or False? Fines are the most productive particles in the working mix of blast abrasive.


True or False? In abrasive blasting work, a dosimeter is used to measure exposure to blasting dust.


True or False: Sponge blasting employs particles of sponge as abrasive.


What pressure range would you want to see on a needle gage inserted behind the nozzle of a blast hose?


Which of the following SSPC abrasive blast cleaning standards requires the most rigorous degree of cleaning of steel?


Why should the surface temperature of steel be at least 5 degrees higher than the dew point temperature before you blast-clean or paint?


Which of the following answers organizes SSPC abrasive blasting standards from least to most rigorous?


True or false: The number of surface profile peaks in abrasive-blast-cleaned steel has no effect on coating performance.


True or false: In air abrasive blast cleaning of steel, a venture nozzle generates a deeper blast profile than a straight bore nozzle with the same diameter opening.


True or false: In abrasive blasting work, a dosimeter is used to measure exposure to abrasive blasting dust.


True or false: Some state highway departments have banned the use of silica sand for abrasive blasting.


If you’re a contractor concerned with meeting the end condition appearance requirements for steel after blast cleaning, what precaution might you take?


A conductivity meter is normally used to check for what contaminants on abrasive for blasting?


True or false: One kind of wet blast system uses air rather than water pressure as the cleaning force.


Abrasive blast workers are regularly exposed to noise in excess of what level?


What happens to carbon steel when it loses its oxide layer, millscale, in the abrasive blasting process?


In air abrasive blasting, why is it sometimes useful to adjust the angle of attack (angle of the nozzle in relation to the workpiece)?


When abrasive is recycled without sufficient new abrasive being added to the operating mix, what happens to the surface profile of steel being cleaned?


True or False: The Australasian Corrosion Association is licensed to teach SSPC’s C7 Abrasive Blasting course.


Which of the following answers organizes SSPC abrasive blasting standards from most to least rigorous?


True or false: In air abrasive blasting operations, the same particle size mix of silica sand and coal slag yield different profile ranges on steel.


Why is crystalline silica sand more likely to cause silicosis when used as an air abrasive blasting material than it is in its natural state, for instance, as beach or river sand?


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


True or false: Abrasive blasting and other scarification techniques increase the surface area of a steel substrate and provide additional reactive sites for molecular association between paint and metal.


Why is it necessary to remove grease from a metallic surface before you clean it by abrasive blasting?


Which of the following is most likely to be the result of excessive profile depth on steel after blast cleaning?


A stationary centrifugal wheel blast machine typically uses what type of abrasive?


True or false: ISO Sa2.5, describing very thorough abrasive blast cleaning, gives a more comprehensive written description of the end condition of the steel after blasting than SSPC SP 10/NACE No. 2, Near white metal, which requires a similar end condition.


In general, which of the following coating types or conditions is easiest to remove by blast cleaning?


In abrasive blasting work, how small do dust particles have to be to make them respirable and therefore dangerous to health?


Which of the following range of readings would you most likely see on a needle pressure gage inserted behind the nozzle of a blast hose?


True or false: In abrasive blasting, the harder the abrasive, the deeper the profile it is likely to generate.


A White Metal Blast, SSPC-SP 5, allows what to remain on the surface after blast cleaning?


What would be the most likely result of excessive profile on a steel substrate after abrasive blasting?


In air abrasive blasting operations, how is a moisture separator or filter used?


True or false: An abrasive metering valve should feed abrasive at 90 degrees into the air stream of an abrasive blasting system.


Embedment of abrasive grit is a problem often encountered in surface preparation of stainless steel.


Where would you expect to find an air wash separator?


What is one main purpose of a deadman switch on a blasting system?

(Question submitted by KVG, a PaintSquare News subscriber)


Burnishing, polishing, and abrasive blasting are examples of what?


Which of the following parameters affects the depth of the surface profile when steel is cleaned by abrasive blasting?


Which of the following is an advantage of using steel shot rather than steel grit in a blasting system?


 
 
   

**Commercial white papers, product videos, and other sponsored documents posted on this site are paid content from third-party companies; inclusion and posting on this site does not imply an endorsement nor recommendation of the content by Technology Publishing/PaintSquare. By signing in and viewing or downloading this paid content, you agree to make your name and full contact information available to the sponsor of the content.

Advertisements
 
SAFE Systems, Inc.
 
Portable Blast &
Recovery Equipment
 
Trailer or skid mounted blast and recovery equipment. Systems designed for maximum versatility, environmental compliance
and overall cost savings.
Call 1-800-634-7278
 

 
SABRE Autonomous Solutions
 
Safety
 
Removing blasting operators from harmful environments is our key objective.
 

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

 
Clemco Industries Corp.
 
Maximum Dust Suppression Systems Start at $14,950
 
The system comprises proven technology and equipment with user-friendly flexibility in mind. See it in action.
 

 
Abrasives Inc.
 
Discover the MAGIC.
 
Black Magic® coal slag. It’s consistent, cleaner, cuts better, less dust. Get it where you need it, when you need it. Abrasives Inc. info@abrasivesinc.com
 

 
Atlantic Design, Inc.
 
CLICK HERE
 
to see what we did to this dust collector! ADI can increase the efficiency and life of your equipment! Any brand, for less than new! 866.Call.ADI
 

 
Absolute Equipment/Grand Rental Station
 
TIER 4 EQUIPMENT
 
We have Tier 4 Equipment including Air Compressors & Generators for Sale & Rent! Your job may now require Tier-4. www.absoluteequip.com or Call 412-931-6655.
 

 
Axxiom Manufacturing
 
Schmidt Improves Conversion Kits
 
Schmidt's conversion kits turn out-of-date blast pots into high quality, efficient blasters. Quick, easy to install with step by step instructions.
Call 1-800-231-2085
 

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

 
Jotun Paints Inc.
 
Jotachar JF750 - The Time Saving Solution
 
The only mesh free solution for jet fire scenarios. Jotachar saves installation time and material costs - the next generation of epoxy passive fire protection.
 

 

Technology Publishing Co., 2100 Wharton Street, Suite 310, Pittsburgh PA 15203-1951

TEL 1-412-431-8300  • FAX  1-412-431-5428  •  EMAIL webmaster@paintsquare.com


The Technology Publishing Network

Durability + Design PaintSquare the Journal of Protective Coatings & Linings Paint BidTracker

 
EXPLORE:      JPCL   |   PaintSquare News   |   Interact   |   Buying Guides   |   Webinars   |   Resources   |   Classifieds
REGISTER AND SUBSCRIBE:      Free PaintSquare Registration   |   Subscribe to JPCL   |   Subscribe to PaintSquare News
MORE:      About PaintSquare.com   |   Privacy policy   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us