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Category: Abrasives

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Daily Quiz (48)

All content matching this tag

True or false: Chopped-up quills from goose feathers are used as abrasive to remove coatings from sensitive substrates.

Thursday, September 18, 2014


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

Tuesday, September 9, 2014


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

Wednesday, July 30, 2014


Which method of blasting produces the least blast debris, presuming the same substrate in the same condition is being cleaned by each method?

Friday, June 13, 2014


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

Monday, April 14, 2014


True or false: Staurolite sand can be considered a “green” abrasive because it is an industrial byproduct.

Thursday, April 3, 2014


If an abrasive fractures easily, it is said to be which of the following?

Thursday, March 27, 2014


Olivine is what type of blasting abrasive?

Wednesday, March 26, 2014


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

Monday, March 3, 2014


True or false: Though not described in a standard, one check for oil contamination of abrasives involves putting abrasive in a clean glass jar with clean water, putting a lid on the jar and shaking it, and then checking for an oil film on the surface of the water or coloration or cloudiness of the water itself.

Thursday, February 6, 2014


True or false: SSPC-AB 1, Mineral and Slag Abrasives, includes manufactured, non-metallics such as silicon carbide.

Monday, February 3, 2014


True or False: Silica sand and coal slag abrasive with the same particle size distribution will produce different profile depth ranges on blast-cleaned steel.

Friday, November 15, 2013


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

Monday, November 11, 2013


What kind of blasting abrasive is comprised of aluminum silicate?

Thursday, November 7, 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


What is another name for “work mix?”

Friday, October 4, 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


What instrument would you use to analyze soluble salt contamination on abrasives?

Thursday, September 19, 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


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

Thursday, August 29, 2013


Which abrasive type is most likely to be used in a portable wheel blast machine for surface preparation of concrete floors?

Tuesday, July 23, 2013


True or false? The shells from sunflower seeds are recycled as agricultural blast abrasives.

Friday, June 7, 2013


True or false? The contractor is responsible for field testing for oil and soluble salt contamination of new mineral and slag abrasive media before use.

Friday, May 24, 2013


According to JPCL author David Dorrow, what makes an abrasive “green?”

Monday, April 29, 2013


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

Wednesday, April 24, 2013


Determining the particle size distribution of blast abrasive is achieved by what method?

Tuesday, March 12, 2013


Which one of the following blasting abrasives is derived from mineral deposits?

Wednesday, November 21, 2012


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

Thursday, October 4, 2012


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

Monday, September 10, 2012


What kind of abrasive was used to remove the failing baked-on gold enamel from 30,000 square feet of clay tiles on the New York Life building in preparation for applying gold leaf?

Tuesday, August 28, 2012


Which of the following is an abrasive media used in a blasting system on delicate substrates?

Tuesday, August 21, 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: Generally speaking, a high-density abrasive will not clean as fast as a less-dense abrasive.

Thursday, April 26, 2012


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

Wednesday, March 21, 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


True or false: If you are removing a soft, pliable coating from a steel surface, a rounded abrasive will be more productive than an angular one.

Wednesday, March 7, 2012


What are abrasive fines?

Tuesday, January 3, 2012


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

Tuesday, November 29, 2011


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

Thursday, October 6, 2011


True or false: Chopped-up quills from goose feathers are used as abrasive to remove coatings from sensitive substrates.

Wednesday, July 13, 2011


A conductivity meter can be used to check for what contaminant on abrasive?

Wednesday, June 15, 2011


What is the main reason for a sieve analysis of abrasive?

Tuesday, April 26, 2011


Which of the following abrasive types is normally the hardest?

Friday, April 15, 2011


What is abrasive friability?

Thursday, March 31, 2011


In addition to steel abrasives, which of the following can be considered for reclamation and reuse?

Friday, December 3, 2010


Which of the following materials is not used to create abrasive media for a blast cleaning system?

Tuesday, September 7, 2010


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