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Daily Quiz (23)


What inspection instrument uses a wet bulb and a dry bulb?


True or false: Relative humidity sensors used to determine moisture content of concrete slabs can produce fairly accurate results within an hour after probes are inserted into a slab, according to a manufacturer of the test equipment.


When assessing the moisture content of wood with a suitable moisture meter, what level of moisture is generally considered to be the upper limit for successful painting?


How can a hygro thermometer be useful in coating work?


What is another name for wet storage stain?


True or False: The plastic sheet method is a quantitative test for determining the extent of moisture in a concrete slab.


True or False: Relative humidity at the surface of bridge steel may be different from the relative humidity in the atmosphere away from the steel surface.


What does the anhydrous calcium chloride test measure?


True or False? Many coating manufacturers recommend a maximum relative humidity of 40% within a concrete slab before their flooring products are applied.


True or False? Before electronic instruments became available to measure dew point and relative humidity directly, surface temperature thermometers were used to derive these readings.


When assessing the moisture content of wood with a suitable moisture meter, what level of moisture is generally considered the upper limit for successful painting?


True or False: Air leakage into a building can generate much more moisture than moisture vapor transmission can.


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%.


True or false: There are no quantitative methods for determining levels of moisture in concrete floor slabs.


True or false: The anhydrous calcium chloride test for measuring moisture in concrete slabs is a qualitative rather than a quantitative test.


True or false: The density of concrete prevents water vapor and gases from moving freely within the matrix.


Instruments used to test moisture in concrete or masonry walls are based on what principle?


True or false: The most accurate meters for detecting moisture within a concrete substrate are based on readings of temperature and humidity.


Why would a test for moisture content of concrete be important prior to application of thick-film elastomeric coatings?


Dried salt deposits on a brick exterior (see photo), resulting from moisture leakage through a wall, are called what?


When assessing the moisture content of wood with a suitable moisture meter, what level of moisture is generally considered the upper limit for successful painting?


True or false: Both relative humidity and temperature differentials from one side to the other can drive moisture vapor through a block wall.


True or false: A moisture content of 30%, as measured by a moisture meter, is generally considered the upper limit for successful painting of wood.


 
 
   

Blastman Robotics Ltd.
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Specialty Products, Inc. (SPI)
Polyurea & Polyurethane Spray Foam Training

SPI is committed to industry leading technical training for polyurea & polyurethane spray foam professionals. Attendees receive hands-on, in-depth training for using and troubleshooting plural-component equipment, spray guns, machine hoses & parts.


Desco Mfg. Co., Inc.

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NACE
Keep your records straight!

For use in the field, with step-by-step job-specific entry spaces for the entire coating or lining project; also available in condensed version. Get it today!


Monti Tools, Inc.
BRISTLE BLASTER® - THE ORIGINAL ONE

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up to 4.7 mils | Removes corrosion & coatings |
ATEX approved for zone 1
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Waterjet Technology Association (WJTA)
2016 WJTA-IMCA Expo Nov. 2-3, New Orleans

See the latest advances in automated and handheld UHP waterjetting tools/systems for paint/coating removal, surface prep, industrial cleaning. Exhibits, live demos.


Clemco International GmbH
Global engineering-trusted solutions

For more than 70 years, Clemco has provided the highest quality blast equipment with a total commitment to comfort and safety.


Hempel (USA) Inc.
Hempel Protective Coatings

With IMO, PSPC approved tank coatings solutions we give you tough, long lasting results that are tailored to meet your exact needs. Contact us at offshore@hempel.com today.


DeHumidification Technologies
HUMIDITY PROBLEMS?

DH Tech has the most innovative and reliable equipment available to
control humidity efficiently
and effectively.
IT'S UNDER CONTROL!


Nationwide Overspray
Profession Overspray Removal Services

The Finest Name in Safe Overspray Removal. We specialize in removing all contaminants from any surface. Family Owned and Operated for 33 years! Fully insured. Satisfaction is guaranteed.

 
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