IMPORTANT QUESTIONS – 29.12.
2019
1) which standard to be follow for surface cleanliness of pictorial chart?
a – ISO 8501-1
2) what is the moisture content allow before coating on concrete surfaces?
a- 4 percent
3) what is standard for safety requirement of painting?
a- SAES-H-102
4) what is the maximum size of brush for paint application?
a – 125 mm (5")
5) in what sequence the internal blasting will be done for the tank?
a- from top to bottom
6) in inorganic zinc silicate what is zinc known as?
a- pigment
7) what is the speed for high voltage holiday detector?
a- 300 mm/sec
8) what is the maximum relative humidity for coating application?
a- 80 (.8)
9) which standard to be follow for surface cleanliness for commercial blast cleaning?
a – SSPC - SP - 6
10) what is the percent of clean blast for commercial blast cleaning?
a- 33 percent
11) which standard to be follow for surface cleanliness for near metal white blast cleaning?
a- SA- 2.5
12) what does the discontinuity mean?
a – holiday
13) in what sequence the internal blasting will be done for the tank?
a- from top to bottom
14) holiday testing for the external fbe coating?
a- 2400 volts
15) blisters?
a- presence of hygroscopic salts
16) where the dead men handle (shut off) to be attached?
a- as nearest to the nozzle to operate it easily.
17) x coarse replica tape range?
a- 38-115 microns
18) what is dial micrometer?
a- to check surface profile
19) is silica gel is a good desiccant?
a- yes
20) define dew point?
a- the temperature at which the water vapor in the air will get condense.
21) which adhesion test shall be done for fbe coating?
a- x cut
22) can new galvanized will be coated with apcs for more protection?
a- yes
23) corrosion?
a- degradation of a metal by chemical means.
24) preparation of the damage areas known as?
a- feathering.
25) what is the 45:1 ratio for the airless spray pump?
a- the inlet to outlet pump ratio
26) how to store 12-meter length pipe fbe coated pipes?
a- it shall have 3 full encirclements.
27) what is the maximum height of weld cap or internal root protrusion?
a- 1.5mm
28) sulfate and chloride content for abrasive?
a- less than 50 ppm.
29) solvent shall not be applied to surface warmer then?
a- 50deg cel
30) thinner can be added to paint?
a- as per paint manufacturer
31) coating pull back in after paint cure happen on the sharp edges?
true
32)when surface contamination in steel like salt spray dust and other debris what
failure will occur?
lack of adhesion
33 during internal blasting of a crude oil tank what surface preparation is required
prior to start blasting?
solvent cleaning
34 wet sponge holiday volts for the internal tank
67.5 volts
35)before filling the water inside the tank what test has to be done
holiday test with repair/water
36)paint over buried ss pipe?
halide liquid free coating, liquid coating recommended by rsa
37)profile range given in msds, pds?
apcs specification
38)during water jetting blasting which device will protect from slippery of nozzle
whip lock
39)where the trigger safety catch shall be engaged in airless or conventional?
the trigger safety catch shall be engaged whenever the airless gun is left unattended
40)relative humidity can be obtained by -
sling pyrometers
41)what is sling pyrometers
Use to check humidity
42.pot life?
time interval between mixing and application until to use
42)what is induction time?
1. blasting and coating shall not be performed if:
a) the substrate contains oil, grease, dirt, loose coating, loose rust, or other surface
contaminants.
b) the substrate temperature is less than 3°c (5°f) above the dew point.
c) wind is strong enough to blow sand, salt spray, or other foreign matter onto the
surface being coated.
d) all of the above
2. the following coating defect may be seen immediately after a thick film of epoxy coating
sprayed on vertical pipe
a) checking and cracking
b) sagging/curtains
c) mud cracking and chalking
d) blistering
3. anode, cathode, metallic pathway and electrolyte are elements of corrosion cells
a) true
b) false
4. relative humidity can be obtained by using?
a) surface profile gauge
b) electronic dft gauge
c) sling psychrometer
d) surface thermometer
5. after applying paint on the surface, paint got wetted by raining, as a painting inspector
what will you do?
a) recoat painting without removing existing coating
b) wait for water dry
c) re-blast and re application
d) abrade and remove affected area by sanding
6. single pack epoxy paint drying by?
a) oxidation
b) chemical curing
c) coalescence
d) solvent evaporation
7. the Swedish standard designation for commercial blast cleaning is
a) sa 1.
b) sa 2.
c) sa 2.5
d) sa 3.
8. near white metal blast for steel surface is defined as
a) 100% of the blasted surface grains are in white metal conditions
b) 95% of the blasted surface grains are in white metal conditions
c) 65% of the blasted surface grains are in white metal conditions
d) 35% of the blasted surface grains are in white metal conditions
9. an “induction” time for a paint is the
a) time between the manufacture date and application date
b) time between the application and fully drying of coating
c) the length of time a paint is required to stand after mixing and before application. this
time allow the bubbles to escape and/or chemical reaction to take place.
d) time the coating and applied by spray after mixing
10. Saudi Aramco engineering standard which describe safety rules of abrasive blasting
and coating
a) saes-h-002
b) saes-h-002v
c) SAES-H-102
d) saes-h-001
11. an abrasive blaster shall keep dead man control switch by
a) at his hand holding along with blasting nozzle
b) connected with blasting pot
c) control by crew supervisor
d) control by blasting helper
12. when an abrasive blaster is working in an offshore area, he must wear
a) safety shoe, leather gloves and coverall
b) blasting hood with fresh air line
c) safety belt & life jacket
d) all of the above
13. the tip size of an airless spray gun is define as 319
a) the fan width is 3º and the nozzle size is .019”
b) the fan width is 30º and the nozzle size is .019”
c) the fan width is 300º and the nozzle size is .019”
d) the fan width is 30º and the nozzle size is .319”
14. the coating system that is applied on a splash zone area is
a) apcs-20
b) APCS-19c
c) apcs-22
d) apcs-113
15. the recoating interval is the time between
the minimum time between the application of one coat of paint and the application of
the next coat
a) the minimum time between the application top coat and color coding
b) the minimum time between the application stripe coat and spray application
c) the minimum time between the application touch-up and full coat system
16. grounding shall be carried out for the following equipment
a) airless spray machine
b) air compressor
c) air receiver tank
d) all of the above
17. corrosion can be control by
a) design and material selection
b) protective coatings and catholic protection
c) inhibitors and alteration of the environment
d) all of the above
18. what is anchor pattern
a) the peaks and valleys on the surface
b) surface pitting
c) mil scale
d) all of above
19. what is rust grade c on steel surface
a) steel surface covered with both mill scale and rust
b) steel surface completely covered with rust pitting visible
c) steel surface completely covered with adherent mill scale little or no rust visible
d) steel surface completely covered with rust little or no pitting visible
20. galvanic corrosion occurs on which of the following substrate
a) concrete
b) wood
c) metal
d) fiberglass reinforced plastic
21. relative humidity is
a) the amount of water vapor present in air expressed as a percentage of the amount
needed for saturation at the same temperature.
b) the lowest temperature at which moisture forms on a steel surface
c) the temperature at which moisture forms on a steel surface
d) a measure of the amount of moisture in the air compared to the air temperature
22. dew point is the temperature at which
a) water freezes
b) humidity decreases
c) the air is saturated
d) condensation occurs
23. the distance from nozzle to blotter paper when performed the compressed air quality
test shall be
a) 30-40 cm
b) 45-60 cm
c) 60-70 cm
d) 55-65 cm
24. high thickness of zinc silicate cause
a) sagging
b) mud cracking
c) curtaining
d) cohesive failure
25. ral number represents
a) thinner code
b) color code
c) batch number
d) solvent code
26. if an airless spray pump ratio 35:1 fluid pressure 2800 required for inlet pressure
a) 100 psi
b) 90 psi
c) 80 psi
d) 60 psi
27. which of the following is not an information of daily report sheet?
a) dew point
b) relative humidity
c) air temperature
d) relative density
28. what profile range can be measured using x-coarse testex?
a) 20-50 µ
b) 38-115 µ
c) 38-50 µ
d) 40-65 µ
29. how many microns are in 4 mils?
a) 115 µ
b) 90 µ
c) 101.6 µ
d) 150 µ
30. what are the characteristics of an abrasive?
a) density
b) hardness
c) shape
d) all of above
31. name the gauge used for measuring pressure at the blast nozzle
a) hypodermic needle pressure gauge
b) relief pressure gauge
c) air pressure gauge
d) all of above
32. the air receivers that are used as a surge tank between compressor and blasting pot
shall be hydro tested at a pressure of at least
a) 150 psi
b) 125 psi
c) 175 psi
d) 250 psi
33. coating materials used for construction site must be cover and the temporary storage
period shall not exceed
a) 10 days
b) 05 days
c) 14 days
d) 07 days
34. the use of recycled abrasives is permitted only in shops provided that the recycling
system is
a) inspected and approved by coating inspector
b) approved by project manager
c) evaluated and approved by CSD.
d) approved by project inspection department
35. after blasting the external coating surface chloride content shall not exceed
a) 30 mg/m²
b) 15 mg/m²
c) 20 mg/m²
d) 40 mg/m²
36. after blasting the internal coating surface chloride content shall not exceed
e) 30 mg/m²
f) 15 mg/m²
g) 20 mg/m²
h) 40 mg/m²
37. in case of brush application, the maximum brush size shall be used
a) 75 mm
b) 100 mm
c) 125 mm
d) 150 mm
38. what defect could occur if the profile is higher than specified
a) blister
b) mill scale
c) pinpoint rusting
d) cause paint adhesion
39. SSPC SP 3 is a standard for
a) white metal blast cleaning
b) pickling
c) power tool cleaning
d) hand tool cleaning
40. the temperature of which moisture begins to condensate on a steel surface is called
a) relative humidity
b) dew point
c) maximum surface temperature
d) minimum surface temperature
41. what standard explains how to measure dry film thickness with magnetic gages?
a) sspc-pa1
b) SSPC -PA2
c) sspc-pa3
d) sspc-pa4
42. what documents will describe the health and safety of hazard of a coating material?
a) the job specification
b) material safety data sheets
c) sspc safety specification
d) osha standard
43. what is the correct storage temperature range for coating?
a) 30 to 90 f
b) 40 to 120 f
c) 45 to 100 f
d) followed by product data sheets of the coating materials.
44. standard test method for measuring adhesion by the tape test.
a) ASTM d 3359
b) ASTM d 3363
c) ASTM d 3350
d) ASTM d 3747
45. wet sponge holiday detector is checked with-----dc volts for DFT not exceeding-------
a) 90v/ 600microns
b) 69.5v/ 500microns
c) 67.5v/ 500microns
d) 67.5v/ 1000microns
46. What DFT will get, when applied 150µ wft with 50% of volume solid?
a) 85micron
b) 90micron
c) 100micron
d) 75micron
47. what is the field adhesion test on fbe?
a) cross cut adhesion test
b) dolly test
c) x cut adhesion test using sharp knife
d) all of the above
48. what is the minimum nozzle air pressure required for abrasive blasting?
a) 90 psi
b) 75 psi
c) 100 psi
d) 80 psi
49. what would you do if you receive coatings that have exceeded their shelf life?
a) use the coating if it’s the appearance is normal
b) use the material if there is no hard setting of pigment
c) shall be set aside and must not be used unless written authorization to the contrary
is given by the consulting services department.
d) contact the coating manufacturer for information about the usability of the coatings.
50. what is the correct formula for computing the wet film thickness (wft), needed to achieve
the specified dry film thickness (dft) of a coating?
a) wft = dft x percent solids by volume
b) wft = dft x 0.50
c) wft = dft x percent of solids by wt.
d) dft x vs
51. which of the following characteristics of paint is easily tested in the field?
a) viscosity
b) dry opacity
c) identification of the solvent in the paint
d) identification of the paint resin
52. windy condition can cause which of the following paint defects?
a) wrinkling
b) sagging
c) fish eyes
d) dry spray
53. if the given dft is 400 microns and volume of solids is 100% what is the wft
a) 450micron
b) 500micron
c) 400micron
d) 350micron
54. grounding wire for blasting and coating equipment shall be awg?
a) 6 or larger
b) 8 or larger
c) 4 or larger
d) 5 or larger
55. what profile range can be measured using coarse testex?
a) 40-65microns
b) 20-50microns
c) 30-70microns
d) 15-50microns
56. what profile range can be measured using x coarse testex?
a) 20-50microns
b) 42-70microns
c) 37-115microns
d) 30-70microns
57. the maximum length of field girth weld coating on pipeline shall be?
a) 12inch or 300mm
b) 10inch or 250mm
c) 15inch or 200mm
d) 11inch or 280mm
58. for internal fbe coating, the weld cap or internal root protrusion shall not be more than
a) 5mm
b) 10mm
c) 2.5mm
d) 1.5mm
59. which apcs is followed for external fbe coating of pipe?
a) apcs-117
b) apcs-102 a, b, c
c) apcs-104 a, b, c
d) apcs-113 a
60. which apcs is followed for internal fbe coating of pipe?
a) apcs-117
b) apcs-102 a, b, c
c) apcs-104 a, b, c
d) apcs-113
61. what is the dc volt range for holiday testing of fbe coating?
a) 1000-1500 dc
b) 2000-5000 dc
c) 1500-2000 dc
d) 2500-4000 dc
62. what is samss for internal fbe coating?
a) 09-samss-067
b) 09-samss-087
c) 09-samss-107
d) 09-samss-091
63. what is samss for external fbe coating?
a) 09-samss-067
b) 09-samss-089
c) 09-samss-107
d) 09-samss-091
64. in which form fbe coating material is prior to use?
a) liquid containers
b) solid
c) powder
d) gas
65. ssps stands for?
a) steel structure painting council
b) steel structure painting code
c) society for protective coating
d) steel structure painting committee
66. what is the speed of high voltage holiday detector while performed testing?
a) 90cm/sec
b) 80cm/sec
c) 30cm/sec or 300mm/sec
d) 75cm/sec
67. while repair on touch up of galvanized steel surface, what generic paint used as primer?
a) zinc phosphate epoxy
b) zinc silicate
c) zinc rich epoxy
d) mastic epoxy
68. which information is not available in Tds?
a) volume solids
b) flash point
c) dew point
d) thinning ratio
69. for blasting nozzle size of 1/2”, what shall be the minimum cfm of compressor??
a) 800cfm
b) 412cfm
c) 550cfm
d) 620cfm
70.aramco standard safety for blasting and painting
SAES- H- 102
71.vail test for?
abrasive cleanliness
72.brush off blast
SSPC SP-7
73.which is not surface preparation method?
heating
74.blasting on concrete surface is slowly, quickly, thoroughly?
thoroughly
75. buried stainless steel lines shall be externally coated with fbe, halide free liquid coating,
apcs-113a, or viscoelastic coating apcs-113c depending on operating temperature
76. abrasive blasting shall be carried out only when the steel surface is at least, -
3°c above the dew point
77.coupling used in blasting?
the blasting hose shall be the static dissipating type with external couplings
78. unit for adhesion pull off test as per Astm 4541 result
mpa,kpa,psi.kg/m2
79.flash rusting will start if the humidity level is?
above 80% (.8)
80.the high-pressure hose is fitted with a safety device known as?
whip lock
81.one advantage of centrifugal blast machine is low cost, easy to clean, complex structures,
less moving parts and contaminants?
82.what is the coating interval?
the time between the first coat and the next coat
83. astm d 4128 stands for?
Dft measurement
84.hand applied splash zone compound is?
APCS- 19A
85.brush off blasting standard?
SP-7
86.where do you find the surface profile range?
Tds/specification of Apcs
87.when the blaster is about to faint which device helps him from stopping the blasting?
Dead man switch
88.the minimum temp difference between metal temp and the dew point?
3 degree
89.ioz is
pigment
90.in which instrument surface profile measurement can be done
dial micrometer
91.maximum length required for fbe field girth weld is
280 mm
92when steel surface is contaminated by water of salts, the failure the coating occurs in the
form of bubbles shape is called?
osmatic blisters
93. MEK curing test as per ASTM D4752 is used to conduct test for
a) FBE Coating b) Liquid Coating c) IOZ
94. SP 11- Power-Tool Cleaning to Bare Metal.
95. SP 12- Surface preparation by Water Jetting
96. SP-13- Surface Preparation of Concrete
97. SP-14- coated and uncoated surface preparation with abrasive
98. SP-15- Commercial Grade Power-Tool Cleaning with profile 25micron.
99. SP-16- Brush-Off Blast Cleaning of Coated and Uncoated Galvanized Steel, Stainless
Steels, and Non-Ferrous Metals
100. What are Amines?
Amines are Curing agents
101. Polyethylene protrusion can be done by cross-section or vertical.
a) True b) False
102. Galvanic corrosion occurs on which of the following conditions?
a) Similar Metals b) Dissimilar Metal
103. FBE Coating is?
Thermosetting
104. Min. Pressure at nozzle required for Abrasive blast cleaning.
a) 90 PSI b) 40 PSI c) 120PSI
105.For cone shaped tanks coating, Coating shall be done.
a) Shell side. b) Roof to bottom. c) Bottom
106.PH value shows
Acid / alkaline nature
107.FBE coating powder in liquid form stage is mentioned as
Gel stage
108.Holiday test shall not be done if temperature of substrate is more than…
a) 780C. b) 680C. c) 88°C.
109.Potassium Ferro cyanide test is used for detecting.
Soluble Iron salts
110.Max allowed chloride content for abrasives.
a) 100 ppm b) 50 ppm c) 40ppm
111.Stripe coating for Inorganic zinc coating shall be done at.
a) Before first coat application b) After first coat application
112.PE coating on piping can be done by Cross extrusion / sideways extrusion.
True / False
113.Gauge used for dry film thickness on thin film coating.
a) Digital gauge b) Banana gauge c) Pocket spot Instrument gauge d) All of the above
114. MSDS shall be used by.
a) Coating b) Solvent c) Cleaners d) All
115. Weld cap / internal protrusion shall not be more than
1.5 mm
116.Requirement of Light used for confined space
a) 24 V explosion proof. b) 12V explosion proof. c)110V explosion proof d)12V normal
117.Silica gel is not very good desiccant.
True / False
118.Coating shall be done within ----hrs. of blasting completion.
a) 2 b) 3 c) 4
119.Lining is not suitable for
a) Corrosion b) UV protection c) Abrasion
120.Who will recommend the solvent type for coating?
a) Coating Inspector b) Manufacturer datasheet c) Contractor
121.Hand tool cleaning will make the surface
a) Rough b) Smooth and shiny/polishing c) Very good Profile
122.Sealer coat application is possible immediately following thermal spray coating.
True / false
123.Blisters formed on coating by
Water/solvent entrapment underneath the coating film.
124. how mill scale produce?
Oxidation
125.The basic formula of WFT is?
WFT = DFT x % Solids by volume
126. The basic formula of DFT is?
DFT = WFT x % Solids by volume
127. Classification of coating?
Organic and Inorganic
128. PE coating on piping can be done by Cross extrusion / sideways extrusion.
True / False
129. pinholes, skips, misses and discontinuity leads to?
Holidays
130. When using inorganic zinc primer, to avoid pinholes and bubbles occurring in the intermediate
coat of epoxy,
A mist-coat thinned 10 to 20%
131. APCS 113 used
For buried services
132. which one is not included in FBE
Resin, Pigment, Solvent, Additives
133. one bar is?
14.5 psi, 20 psi, 16.5psi, none of above.
134. what is volume of solid?
solidity contacting
135. which one is not apply on girth weld joint?
FBE, Duct tape, Enamel coating, polyethylene coating
136. how mill scale produce in newly pipe?
During the process of hot steel and high humidity.
137.maximum length required for fbe field girth weld is
250 mm
138. what will you do tank before start the process.
100 %Holiday
