Quiz 2 Flashcards
The predominant pigment in sacrificial coating is usually
A – copper
B – magnesium
C – zinc
D – stainless steel
C – zinc
Most coatings in the in dustrial and marine failed are inorganic coatings ? True or false
False
The vehicle of a coding consists of
A- solvent, binder, and liquid additives
B – solvent only
C – binder and pigment
A – solvent, binder, and liquid additives
Which is a component of a coding typically added in a small amounts to perform a specific function?
A – pigment
B – binder
C – solvent
D – additive
D - additive
Which component is a discrete particulate solid used to impact specific properties to the coating in the liquid and solid state?
A – pigment
B – binder
C – solvent
D – additive
A – pigment
A barrier coating…
A – makes it difficult to form an effective electrolyte at the coding/mental interface
B – slows down the reaction occurring at the anode, cathode, or both C – uses a metal that is an anodic to steal and which corrodes preferentially
D – accelerates the penetration of oxygen, water, and soluble salts
A – makes it difficult to form an effective electrolyte at the coding/mental interface
Which type of coating uses a metal that is anodic to steal and which corrodes preferentially
A – barrier coating
B – inhibitive coating
C – sacrificial coding
D – ablative coating
C – sacrificial coating
Mud cracking of an inorganic zinc rich primer is caused by
A – applying the coding too thick
B – applying the coding to a hot surface
C – allowing solvents to evaporate rapidly
D – applying the coating too thin
A – applying the coding too thick
Which of the following is not commonly used as a primer for steel structures?
A – Epoxy
B – vinyl esters
C – organic zinc
D – inorganic zinc
B – vinyl esters
Convertible coatings care bye
A – one of several polymerization mechanisms
B – air drying in low humidity weather
C – machine drying in high humidity weather
D – solely by solvent evaporation
A – one of several polymerization mechanisms
Prior to that job start up, the inspector should do all of the following except…
A – confirm and document that that craftworkers have the certification specified
B – acquire and read all product data sheets for specified coatings
C – confirm all required testing equipment for the project is at hand
D – assist the applicator and mixing the coding properly
C – confirm all required testing equipment for the project is at hand
When inspecting polyurethane coating it is very important for the inspector to…
A - change the specification to adjust the film thickness
B – store the coding at 30°F
C - ensure the specified materials, components, thinners and colors are used
D – Ask the manufactures tech representative to be present during application
C - ensure the specified materials, components, thinners and colors are used
The requirements of a coding project should be defined by the…
A – coating inspector
B – coating contractor
C – project engineer
D – coating specification
D – coating specification
Abrasive blast cleaning of steel surface is
A – measured in mills of cleanliness
B – defined in several different standards
C – based on grades that are the same in all standards.
D – undefined for immersion service
B – defined in several different standards
Which statement is true for ultra high – pressure water jetting?
A – water jetting has higher production rates than dry abrasive blasting B – water jetting will produce an adequate surface pro file for inorganic zinc primer
C – water jetting may remove soluble salts
D - water jetting requires no special safety precautions
C – water jetting may remove soluble salts
NACE NO. 2/SSPC – SP 10 is a surface preparation standard for
A – white metal blast cleaning
B – commercial blast cleaning
C – near white blast cleaning
D– Hand tool cleaning
C – near white blast cleaning
NACE NO. 3/SSPC-SP 6 is a surface preparation standard for
A – white metal blast cleaning
B – near white metal blast cleaning
C – brush off blast cleaning
D – commercial blast cleaning
D – commercial blast cleaning
What is the main reason for assuring blast abrasives are clean?
A -to reduce fire hazard from explosive mixture
B - to prevent clogging of blast equipment
C – to prevent contamination of blasted surface
D – to keep operator PPE to a minimum
C – to prevent contamination of blasted surface
Approximately 75% of coating failures occur because of
A – bad specifications
B – incorrect product
C – poor service preparation
D – improper application
C – poor service preparation
On blast – cleaned surfaces, and ultraviolet light Can Reaville…
A – grease on abrasive blasted steel
B – chlorides on abrasive blessed steel
C- oil on abrasive blasting steel
A and C only
Course replica tape is used when the depth of the anchor pattern/surface profile to be measured is expected to be 3 Mills (75 microns).
true or false
False
The generally accepted nozzle pressure for manual blast cleaning operations is
A – 10–30 PSI (.70–2.07 bar)
B – 45–50 psi (3.10–3.4 bar)
C – 50–90 psi (3.4–6.2 bar)
D – 90–100 psi (6.2–6.9 bar)
D – 90–100 psi (6.2–6.9 bar
When abrasive blasting and aluminum substrate
A - a very aggressive abrasive should be used
B – a high (Deep) profile should be avoided
C – a high abrasive blasting pressure should be used to achieve a deep profile
D – only steel shot and steel grit should be used as the abrasive
B – a high (Deep) profile should be avoided
A well written specification require surface profile depths to
A – be an exact measurement
B - be specified in a range of acceptable measurements
C – be as deep as possible
D – very across the entire service
B - be specified in a range of acceptable measurements
