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The following materials can be used to repair fusion bonded epoxy: -
✔✔✔ANSWER-1. Epoxy FBE melt sticks 2. LIquid epoxy 3. Repair patches
,The majority of the pipes coated at a facilty or plant and shipped to site are called:
- ✔✔✔ANSWER-Plant applied
Thermal spray safety practices - ✔✔✔ANSWER-1. HP rated hoses 2. Never use
compressed air to clean work area or clothing 3. Don't use plant air for breathing
air
Three main types of anti-fouling coatings - ✔✔✔ANSWER-1. Ablative 2. Self
smoothing 3. Foul release
Three NACE standards and classifications. Name and define them. -
✔✔✔ANSWER-Standard practice: Details of construction, methods of treating
required to reduce corrosion. Test methods: Ascertain characteristics of material
design and operation. Materials requirement: State necessary characteristics when
corrosion is a factor in the selection application or maintenance of a material.
Transfer methods for environmental test instruments - ✔✔✔ANSWER-1. USB
transfer cable 2. IR (Infrared) 3. Bluetooth
Two broad categories of corrosion? - ✔✔✔ANSWER-1. General 2. Localized
Two condsiderations w/regards to back thrust - ✔✔✔ANSWER-1. Operator body
weight 2. Alternating operators (fatigue etc.)
Two curing categories of powder coating - ✔✔✔ANSWER-1. Thermoplastic:
Softens when heated 2. Thermo-setting: Hardens when heated
, ______________ is performed at the work area by working the edges of the
repaired area back to achieve a fairly smooth transition from the repair area to
sound coating. - ✔✔✔ANSWER-Feathering
4 stages powder goes thru when heat is applied? - ✔✔✔ANSWER-1. Flow 2.
Wetting 3. Gel 4. Curing
Advantages of CTE pipeline coatings - ✔✔✔ANSWER-1. Ease of application 2.
Long life
Advantages of plural component airless over single piston: - ✔✔✔ANSWER-1.
Automatic, accurate material mixing 2. Ability to spray thick materials w/o
thinning 3. Ability to spray materials 2/short pot lives.
Advantages of watersetting and wet abrasive blasting - ✔✔✔ANSWER-1. Quickly
cuts surface 2. Washes dust away 3. Reduces abrasive and concrete particles in air
At what relative humidity does corrosion virtually cease? - ✔✔✔ANSWER-50%
Basic centrifugal blast set ups include: - ✔✔✔ANSWER-1. Tumbling mills 2.
Multi table machines 3. Plain table machines 4. Swing tables 5. Custom designed
systems
Benefits of de-humidification - ✔✔✔ANSWER-1. crews can begin earlier/work
later 2. all coating done in ideal conditions 3. eliminates contamination of
previously applied coating 4. extended overcoating intervals are avoided. 5.
contractor can guarantee completion time w/accuracy