METAL COATINGS # 16
1. Nuts and Bolts can be coated by
a) Calorising
b) Galvanising
c) Sheradising
d) Anodising
2. At which temperature Aluminium melts
a) 100 oC
b) 240 oC
c) 425 oC
d) 625 oC
3. At which temperature zinc melts
a) 100 oC
b) 240 oC
c) 425 oC
d) 625 oC
4. Mostly offshore and onshore using metal coats
a) Sheradising
b) Calorising
c) Anodising
d) Galvanising
5. To be done by immersing a component in a mix of fine sand and Aluminium powder and
heating
a) Sheradising
b) Calorising
c) Anodising
d) Galvanising
6. An electrolytic method of coating which results in the formation of a dense oxide
a) Sheradising
b) Calorising
c) Anodising
d) Galvanising
7. Hot metal spraying are using temperature at
a) 625oC
b) 540oC
c) 425oC
d) 450oC
8. The use of sealer to improve the performance and prolong the coating life with which of
the following coating systems
a) Polysiloxane
b) Polyurethane
c) Thermal metal spraying
d) Electrostatic spraying
9. Thermally Sprayed Aluminium is not normally applied by which system?
a) Electric arc Spray
b) Sheradising
c) Wire & Pistol
d) Electro – plating
COATING FAULTS #17
1. Addition of thixotropic helps to avoid _________
a) Blistering
b) Sagging
c) Cracking
d) Flaking
2. Which coating fault occurs when over thinning paint?
a)Pinholes
b)Run
c)Spot rusting
d)Hair cracking
3. Which fault relate to Peeling?
a)Orange peel
b)Flaking
c)Wrinkling
d)Cracking
4. Which fault can be avoided when bitumen removed from paint system?
a)Bittiness
b)Blistering
c)Cracking
d)Bleeding
5. Chalking occurs due to
a)Coating age
b)Weathering
c)Shelf life problem
d)Hygroscopic salts
6. Which fault happens when over apply zinc silicate
a)Sagging
b)Run
c)Mud cracking
d)Holidays
7. A coating fault which resembles holidays
a) Checking
b) Cratering
c) Crazing
d) Cissing
8. Over thickness of Zinc silicate cause
a) Sagging
b) Mud Cracking
c) Curtaining
d) Cohesive failure
9. Ropiness is fault look like
a) Roller Stiple
b) Rivelling
c) Brush Marks
d) Blisters
10. Which one is not a Paint Fault?
a) Grinning through
b) Efflorescence
c) Cracking
d) Bittiness
11. Paint defect which their appearance is like a citrus of fruits skin.
a) Wrinkle
b) Shagging
c) Fish Eye
d) Orange peel
12. Which coating fault will look like discoloration?
a) Chalking
b) Bleeding
c) Cissing
d) Curtaining
13. Efflorescence is
a) a weak surface layer of water-rich cement.
b) An oil reaction with alkalinity to make a soap.
c) Moisture passing through the concrete and carrying soluble concrete salts
d) Ice crystals on the surface
14. Where bleeding is evident on a pipe which was previously coated with coal tar, the staining
would be which colour?
a) Black
b) Brown
c) Yellow
d) Red
15. Lifting of coating material from surface is ______
a)Wrinkling
b)Lifting
c) Flaking
d)Mud cracking
16. Paint defect which name is Fish Eye always causes by
a) Over Thickness
b) Substrate contains with oil
c) To much thinner
d) Using wrong mixing solvent
17. Where paint particles fall outside the spray pattern, resulting in a dry, flat, pebbled
appearance, this is known as
a) Orange peel – flocculation
b) Dry spray-over spray
c) Floatation – flocculation
d) overspray-floatation
18. Inclusion, either airborne or from the paint itself?
a) Grinning through
b) Efflorescence
c) Cracking
d) Bittiness
19. Degradation of a binder due to disruptive factors in the environment is ______
a)Wrinkling
b)Lifting
c) Chalking
d)Mud cracking
20. Gas, liquid or crystals are filled with ______
a)Wrinkling
b) Blisters
c) Flaking
d)Bittiness
21. Where bleeding is evident on a pipe which was previously coated with bitµmen’s, the staining
would be which colour?
a) Black
b) Brown
c) Yellow
d) Red
22. The presence of particles of gel, flocculated material or foreign matter in a coating material,
or projecting from the surface of a film.
a) Grinning through
b) Efflorescence
c) Cracking
d) Bittiness
23. Sometimes forms on the floss film of a coating causing loss of gloss and dulling of colour
a) Efflorescence
b) Cracking
c) Bittiness
d) Bloom
24. Cracking that comprises of fine cracks, which may not penetrate the top coat, they
occurerratically and at random
a) Efflorescence
b) Cracking
c) Bittiness
d) Hair cracking
25. cracking that comprises of fine cracks, which do not penetrate the top coat and are distributed
over the surface giving the semblance of a small pattern.
a) Cracking
b) Hair cracking
c) Checking
d) Mud cracking
26. Cracking that resembles checking but the cracks are deeper and broader.
a) Crazing
b) Hair cracking
c) Checking
d) Mud cracking
27. A drastic type of crazing producing a pattern resembling the hide of a
a) Crazing
b) Hair cracking
c) Crocodile
d) Mud cracking
28. Where there is a complete absence of coating materials on random areas of the substrate
a) Ropiness
b) Holidays
c) Lifting
d) Mud cracking
COLOUR # 18
Brightness
Saturation
saturation, greyer the colour
Black and white and the greys in between are called “achromatic” colours
Other colours called “chromatic” Colours clock also called three dimensional model of a helix.
Having five basic colours→ Red, Yellow, Green, Blue and Purple
-ordination for building purposes
1. What is BS 4800 specifies
a) Colour co-ordination
b) Specification of abrasive size sieves
c) Methods of test for paints
d) Glossary of paint and related terms
2. What is 3 attributes which make up the colour of a paint?
a) White, black and colour
b) Hue, Brightness and saturation
c) Red, Yellow and Blue
d) Contrast, Density, and Definition
3. Which of the following are primary colours?
a) Blue Yellow and Green
b) Red Green and white
c) Red White and blue
d) Red Yellow and Blue
4. In colour attributes, Brightness also referred by the term
a) Chroma
b) Intensity
c) Value
d) Weight
5. Chroma, Intensity, Weight are used
a) Hue
b) Brightness
c) Saturation
d) All the above
6. Hue refers to what?
a) Amount of lightness or darkness
b) Basic colour
c) How vivid colour appears
d) All the above
7. Saturation refers to what?
a) Amount of lightness or darkness
b) Basic colour
c) How vivid colour appears
d) All the above
8. Black White Grey is
a) Vivid Colour
b) Achromatic
c) Chroma
d) Basic colour
9. Which of the following is not a system for paint color classification?
a) BS 4800
b) BS 5252
c) Munsell
d) BGC/PS/CW5
10. Which of the following is pipe colour coding?
a) BS 4800
b) BS 5252
c) BS 1710
d) BGC/PS/CW5
11. How is the brightness of colour identified in BS 4800?
a) By Numbers 0-24
b) By Numbers 01-56
c) By letter A-E
d) By letter E-M
12. RAL Number represents
a) Batch Number
b) Thinner Code
c) Colour Code
d) Solvent Code
13. How is the Hue of colour identified in BS 4800?
a) By Numbers 0-24
b) By Numbers 01-56
c) By letter A-E
d) By letter E-M
14. How is the saturation of colour identified in BS 4800?
a) By Numbers 0-24
b) By Numbers 01-56
c) By letter A-E
d) By letter E-M
HEALTH AND SAFETY # 19
OEL examples of some solvents Solvent Name OEL in ppm, Aromatics, Xylene, Toluene, 100
,50,Aliphatic, White, Sprit, Hexane, 100, 500, Chlorinated, hydrocarbon,s Trichloroethane,
Trichloroethylene, 350,ab, 100,ac, Alcohols, Methanol, Ethanol, 200, 1000, Ketones, Acetone,
Methyl, ethyl, ketone, 750, 200, Esters, Methyl, acetate, Ethyl, acetate, 200, 400
1. COSHH abbreviation
a) Control of Substance Hazardous to Health
b) Central of Substance Hazardous to Health
c) Control of Substance Hazardous to Help
d) Control of Substance Health to Help
2. Which warning symbol represents Toxic
a) b. c. d.
Answer: B
3. This is the hazard warning symbol for
a) Toxic or Very Toxic
b) Harmful or irritant
c) Corrosive
d) Explosive
4. This is the hazard warning symbol for
a) Toxic or Very Toxic
b) Harmful or irritant
c) Corrosive
d) Explosive
5. Who is having duty of Safety on a Working site (or) which person on site is responsible for site
safety?
e) HSE (Health & safety executive)
f) Contractor
g) Engineer
h) Employees
6. The document issued by the HSE listing all known harmful substances, is
a) COSHH
b) SI 1657
c) EH40
d) IGE SR 21
7. RAQ is an abbreviation of what?
a) Required Adherence Quota
b) Repair Area qualification
c) Required Air Quantity
d) Required Acceptance Quality
8. Every depression is RAQ
a) 100 ppm
b) 500 rpm
c) 100 cc
d) 500 cc
9. In dragger tube Number specified is n=5, what is RAQ
e) 500 ppm
f) 5 rpm
g) 500 cfm
h) 500 cc
10. After depressions the colour change is from white to
a) red
b) brown
c) reddish brown
d) black
11. Which would be considered to be the most toxic?
a) Acetone
b) Xylene
c) Ethanol
d) Toluene
12. When testing for Xylene using a Dragger Bellows, the crystals will charge colour.
a) Orange to Black
b) White to Red/Brown
c) White to Green
d) White to Black
13. Expansion for PPM
a) Parts per million
b) Pounds per million
c) Parts per mill
d) None of the above
DUTIES OF AN INSPECTOR # 20
As inspector what do you consider as your main responsibilities?
a) To asses the condition of substrate prior to treatment
b) To inspect surface preparation in accordance with BS 7099: measure and record
amplitude once in daily.
c) To ensure material used on site are to client’s specification.
d) Relative humidity, dew point, air temperature, metal temperature to be checked and
recorded at least four times daily.
e) Wet and dry film thickness to be checked and recorded frequent intervals.
f) To witness and and inspect application of each coat and inspect completed paint system in
accordance with the clients specification and good paint inspection practice.
g) To submit daily and weekly reports recoding all the relevant information as required by
the client. Copies to be retained by inspector.
1. Which of the following is regarded as the duty of a panting Inspector?
a) Record Dew point, Relative Humidity & Monitor addition of Thinners
b) Check surface profile, cleanliness and make choice of paint color
c) Control of Abrasive type, blasting pressure and selection of personnel
d) Control of paint storage, appearance of finish, and painter’s timesheets
LIST OF SPECIFICATION AND BS Number S 21
1. Internal coating of pipeline comes under
a) PA7
b) PA8
c) PA9
d) PA10
2. Methods of test for paints.
a) BS410
b) BS3900
c) BS7079
d) PA10
3. Schedule of paint colours for building purposes.
a) BS4800
b) BS3900
c) BS7079
d) PA10
4. Preparation of steel substrates before application of paints and related products
a) BS4800
b) BS3900
c) BS7079
d) PA10
5. Visual assessment of surface cleanliness
a) BS4800
b) BS3900
c) BS7079
d) BS 7079 Group A
6. Methods of assessment of surface cleanliness
a) BS4800
b) BS 7079 Group B
c) BS7079
d) BS 7079 Group A
7. Surface roughness characteristics of blast cleaned steel substrates
a) BS4800
b) BS 7079 Group B
c) BS7079 Group C
d) BS 7079 Group A
8. Method of Surface Preparations
a) BS 7079 Group D
b) BS 7079 Group B
c) BS7079 Group C
d) BS 7079 Group A
9. Paint properties and performance requirement
a) PA7
b) PA8
c) PA9
d) PA10
10. The British standard for painting inspection?
a) BS 3900
b) IGE SR 21
c) BS 7079
d) ISO 8501
11. Indentor test can be used to check?
a) EPA ( Environment Protect Act)
b) IGE / TD / 05
c) BS 7079
d) IGE SR 21
QUALITY #22
Manufacturer’s data sheet;
Product description, Recommended use, Technical information, Application data, Condition during
application, Drying and curing time, Recommended painting system, Storage and packing, Health
and safety
Product Data Sheet --- Information’s
Service temperature Paint Application method
Colour Code Thinner
Volume Solid Pot life
Spreading Rate Nozzle orifice
Flash Point Nozzle pressure
Specific gravity DFT, WFT
VOC Issued Date
Mixing Rating
AINT APPLICATION (PA 10) # 23
The Condition for final surface preparation:When conditions in the working area are such that metal surfaces are moist, damp or wet, final
preparation shall not be carried out.
- Any surface preparation procedure or method of cleaning shall not be allowed to
contaminate wet paint film.
- Equipment used shall be of non-sparking type.
- Electrically operated tools are not permitted.
- Power tools operated by compressed air shall have oil trap vapour trap fitted to the
compressed air lines.
- All contaminants shall be removed by means of an approved solvent.
- Allage and mould growth when in evidence shall be treated with biocide agent and left
for at least 24 hours in order that the biocide can kill the spores. It shall then remove by
scrubbing with stiff bristles brushes and clean water or by use of high pressure water
wash.
- All surfaces shall normally be dry before painting commences.
Condition for application of paint as per PA 10 :Paint shall normally applied when
a) the RH % is less than 90%
b) the air and metal temperature is at least 3 deg C above the DP
c) Ambient and substrate temperature should not be below the set out by the paint
manufacturer for particular paint.
d) Paint shall not normally apply when conditions in the working zone are such that the
working surface becomes moist or damp during the painting operations.
e) Painting equipment’s shall be used in accordance with the paint manufacturer’s
recommendations.
f) All paint shall be applied in order to produce a firmly adhering continuous film, free from
misses, runs tears, sag etc.
g) Stripe coating shall be carried out to welds edges etc in order to achieve a full paint film
thickness as specified.
h) All painted areas must be thoroughly dry before being over coated and any contamination
of the paint film should be removed before further coats are applied.
i) Final coating shall be free from significant visible imperfection.
Health and safety
1) What document state health and safety at work?
H.A.S.W.A. : - hazardous and safety at work act1974.
2) What year was the health and safety act passed?
The control of substances hazardous to health regulations 1988 come in to force 1 st October
1989(COSHH regulations).
4) How long would be records of examinations monitoring test for five years and 30 years for
identifiable employees.
5) EPA – environmental protection act waste material disposal
What additional information you should need when maintenance painting a pipeline without
removing the existing coating
The following additional information to be recorded is.
- Nature of the existing system must be established to decide the type of
preparation to be commenced.
- Amount of surface contamination.
- Extent of corrosion.
- Extent of paint breaks down.
- Compatibility of the existing system with the new system. if not compatible
select the appropriate tie coat.
- In service environmental condition.