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Achieving Efficiency in Abrasive Blast Cleaning

The PaintSquare Guide to Abrasive blasting

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Daily Quiz (40)

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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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