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Daily Quiz (166)

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True or false: The Norsok M 501 standard on protective coatings was created by the Norwegian petroleum industry.

Wednesday, October 22, 2014


True or false: SSPC-SP 10 is typically specified as the level of surface preparation for the application of an inorganic zinc-rich coating.

Wednesday, October 8, 2014


True or false: Power tool cleaning is effective in removing soluble salts from a steel substrate.

Friday, October 3, 2014


What is a main difference between SSPC’s Commercial Grade Power Tool Cleaning and Power Tool Cleaning to Bare Metal?

Wednesday, October 1, 2014


Which of the following statements about SSPC-SP 11, Power Tool Cleaning to Bare Metal, is correct?

Wednesday, September 17, 2014


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

Tuesday, September 9, 2014


True or false: There are both pneumatic and electric remote controls for air abrasive blast systems.

Monday, August 25, 2014


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


According to a JPCL article in July, how can flash rusting of newly abrasive-blasted steel be prevented or minimized?

Wednesday, August 6, 2014


True or false: According to a published study, elevated exposure to crystalline silica can result when it is present in coating materials being removed by blast cleaning.

Thursday, July 24, 2014


True or false: Abrasive particle size, shape, and hardness all have an impact on the creation of surface profile.

Tuesday, July 8, 2014


What is a common name for the safety cut-out device at the blast nozzle of an abrasive blast system, which is connected to a pressure-relief valve on the blast pot?

Tuesday, July 1, 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


What organization publishes the Standard for the Preparation of Steel Substrates for PSPC?

Monday, June 23, 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


What SSPC/NACE blast cleaning standard is equivalent to Sa 2, Thorough Blast Cleaning, in ISO 8501-1?

Tuesday, June 10, 2014


Which of the following statements about SSPC-SP 11, Power Tool Cleaning to Bare Metal, is true?

Friday, June 6, 2014


True or false: According to a recent JPCL article, planing is more effective than shotblasting in removing asphalt, latex, adhesives and other materials that are thicker than 2 mm from concrete floors.

Friday, May 30, 2014


True or false: A Schmidt Hammer is used for hand-tool cleaning of steel.

Tuesday, May 27, 2014


True or false: Research by Roper, Weaver, and Brandon has shown that the peak count of surface profile after blast cleaning has no bearing on coating performance.

Wednesday, May 14, 2014


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

Friday, May 9, 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


True or false: SSPC-VIS 1 photographs, depicting the appearance of steel before and after blast cleaning, can be used as substitutes for the written blast cleaning standards when blasted steel is being inspected for compliance with a specific standard.

Thursday, April 24, 2014


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

Thursday, April 17, 2014


What is the process called when steel shot is used to improve the fatigue properties of steel?

Tuesday, April 8, 2014


True or false: One ASTM Test Method for measuring profile on blast-cleaned steel describes the use of a portable stylus instrument.

Friday, April 4, 2014


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

Thursday, April 3, 2014


True or false: ASTM has a test method for determining the size of abrasives.

Friday, March 28, 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


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


How does one surface preparation industry expert, Dr. Lydia Frenzel, differentiate between flash rust and rust back?

Thursday, March 20, 2014


True or false: The only ways to combine abrasive and water in a wet blast system are to inject water into a pressurized abrasive stream or to inject abrasive into a pressurized water stream.

Friday, March 7, 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 happens to the condition of a steel substrate when waterjet cleaning is used to remove rust or existing coatings?

Tuesday, February 11, 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: Some of SSPC’s surface preparation standards are not published jointly with NACE.

Tuesday, January 21, 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: The main reason for using citric acid to etch concrete is to create a profile coarser than that created by other etching agents.

Thursday, January 2, 2014


What instrument or device is used to determine steel profile roughness/peak count requirements as required in SSPC-SP 17 and described in ASTM D4417?

Monday, December 23, 2013


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

Tuesday, December 17, 2013


How can a hygro thermometer be useful in coating work?

Monday, December 9, 2013


True or False: SSPC-SP 11, Power Tool Cleaning to Bare Metal, has no requirement for surface profile.

Friday, December 6, 2013


Press-O-Film is the name of what type of product?

Friday, November 22, 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


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


Which of the following methods for measuring surface profile is not described in ASTM D4417, “Standard Test Method for Field Measurement of Surface Profile of Blast Cleaned Steel”?

Tuesday, November 5, 2013


In general, when is it better to use impact power tools (needle gun, roto peen) rather than rotary tools (wire brush, etc.)?

Friday, November 1, 2013


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

Wednesday, October 30, 2013


SSPC/NACE standards for waterjet cleaning describe how many levels of cleanliness?

Tuesday, October 29, 2013


What organization created and sells rubber replica templates for determining the surface profile of concrete?

Friday, October 11, 2013


What is another name for “work mix?”

Friday, October 4, 2013


True or False: Wire bristle tools were recently classified as impact power tools in SSPC power tool cleaning standards.

Tuesday, October 1, 2013


What is a name sometimes given to the creation of microcracks in a concrete surface through use of impact, pulverizing, or other mechanical surface preparation methods?

Tuesday, September 24, 2013


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

Thursday, September 19, 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


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


What description fits Initial Condition D of steel before blasting?

Friday, August 30, 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


What is the name of the industrial form of hydrochloric acid that is used to clean concrete and masonry?

Wednesday, July 17, 2013


What is another term for surface profile on steel?

Tuesday, May 28, 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: All the SSPC surface preparation standards are issued jointly with NACE.

Tuesday, April 16, 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 answers organizes SSPC abrasive blasting standards from least to most rigorous?

Monday, March 25, 2013


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

Tuesday, March 12, 2013


True or false: Ultra-high-pressure (UHP) water jetting is generally ineffective in removing soluble salts from steel substrates.

Tuesday, February 26, 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


True or false: Dry ice blasting produces a lesser volume of debris than the amount produced by air abrasive blasting using slag abrasive.

Tuesday, January 22, 2013


True or false: Rubber replica templates from the American Concrete Institute can be used to judge the degree of surface profile on concrete.

Monday, January 21, 2013


True or false: To hold the blast (prevent re-rusting of blasted steel) inside a tank, one effective measure is to use dehumidification to keep relative humidity below 50%.

Monday, January 7, 2013


True or false: A broom finish produces a coarse to very coarse finish on concrete.

Thursday, January 3, 2013


Which of the following cleaning techniques is most likely to remove soluble salts from a heavily pitted steel surface?

Wednesday, January 2, 2013


True or false: There is an SSPC power tool cleaning surface preparation standard describing a degree of cleanliness that falls between Power Tool Cleaning, SSPC-SP 3, and Power Tool Cleaning to Bare Metal, SSPC-SP 11.

Monday, December 24, 2012


True or false: A research study by Roper, Weaver, and Brandon indicated that the number of peaks in a steel surface profile created by abrasive blasting has no effect on performance of coatings applied to the steel.

Thursday, December 20, 2012


True or false: Acid etching does not produce a surface profile on concrete.

Monday, December 10, 2012


How are water and abrasive combined in wet abrasive blasting?

Wednesday, December 5, 2012


True or false: SSPC published a surface preparation standard, now discontinued, describing flame cleaning of steel.

Tuesday, December 4, 2012


What is the minimum surface profile required to meet SSPC’s specification, Power Tool Cleaning to Bare Metal?

Tuesday, November 20, 2012


True or false: Baking soda can be used as an abrasive in both wet and dry abrasive blast systems.

Wednesday, November 14, 2012


According to David Dorrow in a recent JPCL article, what constitutes a “green” abrasive?

Friday, November 2, 2012


When water under pressures of 30,000-40,000 psi is used to clean steel before painting, what is this form of cleaning called?

Monday, October 22, 2012


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


Why are inhibitors used in wet blast systems?

Friday, October 5, 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


According to SSPC's Surface Preparation Commentary for Steel and Concrete Substrates (SSPC-SP COM), final dry blast cleaning should not be conducted when the steel surface is less than how many Fahrenheit degrees above the dew point?

Thursday, September 27, 2012


True or False: SSPC’s recent revisions to SSPC-SP 11 and SSPC-SP 15 changed the standards’ requirements for surface cleanliness and minimum surface profile.

Friday, September 14, 2012


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

Monday, September 10, 2012


What is the name of a thin, weak layer of aggregate fines and unreacted constituents at the surface of recently poured concrete?

Tuesday, August 21, 2012


“Surface Preparation and Cleaning of Metals by Waterjetting Prior to Coating” is a newly revised standard by:

Monday, August 6, 2012


Which of the following statements about SSPC-SP 11, Power Tool Cleaning to Bare Metal, is true?

Friday, August 3, 2012


If a specification requires one of the following–brush-off blasting (SSPC-SP 7), commercial blasting (SSPC-SP 6), or near-white blasting (SSPC-SP 10), what other cleaning standard is invoked?

Wednesday, August 1, 2012


What organization recently issued a standard for measuring the profile of concrete after surface preparation?

Tuesday, July 31, 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


Why must laitance and efflorescence be removed before coating concrete?

Thursday, July 26, 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: There is no quantifiable method for determining the surface profile on concrete substrates.

Friday, June 8, 2012


True or false: A combination of chemical stripping and (frozen) ice blasting has been used to remove lead-based paint from bridge steel.

Thursday, May 24, 2012


True or False: Dehumidification equipment is sometimes used to “hold the blast” after surface preparation of the interior of a storage tank.

Monday, May 7, 2012


True or False: Generally speaking, a high-density abrasive will not clean as fast as a less-dense abrasive.

Thursday, April 26, 2012


Among the options below, which is the most important in achieving the specified surface profile on steel when you are air abrasive blast cleaning?

Tuesday, April 10, 2012


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

Wednesday, March 21, 2012


Which of the following conditions affect the efficiency of an air abrasive blasting system?

Wednesday, March 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


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


The SSPC/NACE/AWS specification for thermal-sprayed zinc in a marine service environment requires what degree of blast cleaning?

Monday, February 27, 2012


How can sponge blasting produce a profile on steel?

Friday, February 17, 2012


What happens to the existing profile on steel when UHP water blasting is used to remove rust and/or coatings?

Tuesday, February 14, 2012


What is the name usually given to a robotic surface preparation machine used in the field on ship and tank exteriors?

Tuesday, January 17, 2012


What are abrasive fines?

Tuesday, January 3, 2012


A reduction in air abrasive blast nozzle pressure from 100 psi to 80 psi has what effect on the productivity of the blasting operation?

Wednesday, December 7, 2011


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


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


True or false: Potable water without additional treatment is often used successfully for UHP water jetting prior to painting.

Thursday, October 27, 2011


Which technique would be least likely to remove soluble salts from a steel substrate?

Tuesday, October 25, 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


If you need to answer a question about the surface profile requirements for blasted surfaces on a job, what document would you consult?

Friday, October 7, 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


Which of the following factors influences the appearance of steel after blast cleaning?

Friday, September 23, 2011


With SSPC abrasive blasting standards, if a Near White Blast Cleaning (SSPC-SP 10) is required, the following additional standard is invoked:

Tuesday, September 20, 2011


The ISO surface preparation standard Sa 3 most closely resembles what SSPC/NACE surface preparation standard?

Thursday, September 15, 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


Power tools, such as power wire brushes, can burnish or polish a steel surface. What is the main problem with this?

Thursday, August 18, 2011


Which of the following cleaning techniques is least likely to remove soluble salts from a steel surface?

Monday, August 8, 2011


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

Tuesday, August 2, 2011


Which of the following statements about SSPC-SP 11, Power Tool Cleaning to Bare Metal, is correct?

Monday, August 1, 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 general, when is it better to use impact (needle gun, roto peen) rather than rotary (wire brush, coated abrasive) power tools?

Wednesday, July 20, 2011


True or false: Potable water in a UHP water jetting system is normally of sufficient cleanliness that it will not deposit detrimental contaminants on a steel surface.

Tuesday, July 19, 2011


What is likely to be the result of oil in the compressed air used for abrasive blast cleaning?

Monday, July 18, 2011


Which of the following persons has conducted research and published articles in JPCL and elsewhere on flash rusting after water jetting?

Tuesday, July 12, 2011


Why is it sometimes useful to adjust the angle of attack (angle of the nozzle in relation to the work piece) when conducting air abrasive blasting?

Thursday, July 7, 2011


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

Tuesday, July 5, 2011


SSPC's photographic guides for visual assessment of surface cleanliness after blast cleaning are designed to be used in what way?

Friday, July 1, 2011


What is the purpose of inhibitors used in wet blast systems?

Tuesday, June 21, 2011


Power tools such as power wire brushes can burnish or polish a steel surface. Why is this sometimes a problem?

Friday, June 17, 2011


What is most likely to help you achieve the specified profile on the steel you are blast cleaning?

Thursday, June 16, 2011


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

Wednesday, June 15, 2011


True or false: A research study by Roper, Weaver and Brandon indicated that the number of peaks in a steel surface profile created by abrasive blast cleaning affects coating performance.

Wednesday, June 1, 2011


True or false: CO2 blasting can produce a profile on steel.

Wednesday, May 18, 2011


Which of the following is not used for measuring the surface profile of cleaned steel?

Friday, May 13, 2011


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

Tuesday, April 26, 2011


Sulfate-reducing bacteria contribute to corrosion by what mechanism?

Wednesday, April 20, 2011


Surface profile on steel, measured as peak-to-valley height of the roughness, has several other names, including which of the following.

Monday, April 18, 2011


Which of the following abrasive types is normally the hardest?

Friday, April 15, 2011


What is abrasive friability?

Thursday, March 31, 2011


In its Technology Update on retrieving soluble salts from a steel substrate in the field, SSPC describes two methods. One is swabbing; what is the other?

Monday, March 21, 2011


A needle scaler is what type of power tool?

Wednesday, March 2, 2011


True or false: Rubber replica templates from the American Concrete Institute can be used to judge the degree of profile on concrete substrates after surface preparation.

Monday, February 28, 2011


Which of the following can cause excessive surface profile?

Monday, February 14, 2011


True or false: In protective coatings work, "smut" refers to the metallic fines that cling to a steel substrate after it is cleaned with metallic abrasive.

Wednesday, February 9, 2011


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