Review of Key Quizzes, and Practice Questions for
Guaranteed Success’
Terms in this set (105)
Abrasive media types shot & grit (metallic), crushed slag, ceramic grit, silica sand,
include: garnet, agricultural abrasives, specialty abrasives
Abrasive media typicallysteel shot, steel grit used for
recycling include:
Adhesion failures may be contamination on the surface, wrong surface preparation
caused by: specified, failure to inspect surface preparation, insufficient
surface profile, exceeding the topcoat window, application of
incompatible coatings
Advantages of centrifugal Dust and fines are contained, abrasives are easily recycled,
blast equipment include: blasting and priming can be an inline operation, general
overall economy compared to air blasting, no
compressors, piping, or air handling equipment needed
for wheel blasting
Before the start of the Pre specification, any standard / procedure referenced in the
Job Conference the project specifications, manufacturer's product data sheets,
inspector should obtain a safety requirements of the MSDS
copy of, read, and
understand the:
Checking can be described fine cracks in the surface of a coating that don't extend
as: through to the substrate
Roller, brush, airless spray (including plural component),
Coatings may be applied by
conventional spray, high volume low pressure (HVLP), air
the following methods:
assisted airless
, Coatings Product Data Sheets surface preparation, storage, mixing and thinning, application
(Paint Specs) provide users procedure, DFT requirements
with the following:
A common cause of blistering Surface Contamination under the applied coating
is:
Common design defects Hard to reach or inaccessible areas. rivets, bolts, or other
include: connectors. welds. gaps. overlapping surfaces. threaded areas.
dissimilar metals. construction aids
Common fabrication defects weld spatter, skip welds, sharp corners & Edges
include:
Cracking of coating is noted: When the crack extends to the substrate
Cratering may be caused by: air trapped in the coating and forming a bubble which then
bursts, air trapped in the coating during mixing if the proper
procedures are not followed
Define Corrosion The deterioration of a substance, usually a metal from a
reaction with its environment
Depth of surface profile ISO Comparator, replica tape, digital profile gauge
can be evaluated by
several methods:
Describe High Voltage DC Ground conection must be made direct to metal substrate
Holiday Detectors: (preferred) or indirectly when necessary (e.g., to soil for
pipeline measurement). Rule of thumb: 100V/mil (4V/um).
Electrode rate of 0.3 m/s (1 ft/s) in a single pass (according
to NACE Standard SPO 188).
Voltage output range from 800 to 60,000 V