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The PaintSquare Guide to Abrasive blasting

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Daily Quiz (75)

All content matching this tag

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

Thursday, August 14, 2014


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

Thursday, August 7, 2014


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

Wednesday, July 30, 2014


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

Friday, June 27, 2014


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

Friday, May 9, 2014


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.

Monday, April 28, 2014


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

Monday, April 28, 2014


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

Thursday, April 17, 2014


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

Monday, April 14, 2014


Olivine is what type of blasting abrasive?

Wednesday, March 26, 2014


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

Monday, March 24, 2014


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

Monday, March 3, 2014


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

Wednesday, February 26, 2014


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

Friday, January 24, 2014


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.

Monday, January 13, 2014


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

Thursday, January 9, 2014


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

Monday, January 6, 2014


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

Tuesday, December 17, 2013


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?

Thursday, November 21, 2013


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

Monday, November 11, 2013


Centrifugal wheels are used in what kind of equipment?

Wednesday, November 6, 2013


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

Wednesday, October 30, 2013


Respirators must be approved for use by what organization?

Tuesday, October 22, 2013


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

Thursday, October 17, 2013


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

Thursday, October 10, 2013


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.

Wednesday, October 9, 2013


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

Wednesday, October 2, 2013


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?

Tuesday, September 17, 2013


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?

Thursday, September 5, 2013


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

Wednesday, September 4, 2013


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

Tuesday, September 3, 2013


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

Thursday, August 29, 2013


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

Monday, August 12, 2013


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

Thursday, June 27, 2013


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

Thursday, June 13, 2013


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

Wednesday, April 24, 2013


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

Monday, April 15, 2013


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

Wednesday, April 3, 2013


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

Monday, April 1, 2013


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

Monday, March 25, 2013


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

Thursday, February 14, 2013


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.

Wednesday, February 6, 2013


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

Tuesday, February 5, 2013


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

Tuesday, January 29, 2013


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

Tuesday, October 16, 2012


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

Thursday, October 4, 2012


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

Tuesday, October 2, 2012


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

Monday, September 17, 2012


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

Wednesday, August 15, 2012


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

Friday, July 27, 2012


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

Thursday, July 19, 2012


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

Thursday, July 5, 2012


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

Thursday, June 14, 2012


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.

Tuesday, March 13, 2012


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?

Tuesday, December 13, 2011


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

Wednesday, November 23, 2011


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.

Wednesday, November 2, 2011


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

Wednesday, November 2, 2011


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

Tuesday, October 18, 2011


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

Thursday, October 6, 2011


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.

Monday, September 26, 2011


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

Tuesday, September 20, 2011


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

Tuesday, August 30, 2011


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?

Friday, August 26, 2011


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

Tuesday, August 2, 2011


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

Thursday, July 28, 2011


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

Friday, July 22, 2011


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

Tuesday, July 5, 2011


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

Friday, December 17, 2010


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

Tuesday, November 23, 2010


Where would you expect to find an air wash separator?

Monday, November 22, 2010


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

(Question submitted by KVG, a PaintSquare News subscriber)

Friday, October 29, 2010


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

Friday, October 8, 2010


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

Wednesday, September 22, 2010


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

Wednesday, September 1, 2010


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