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WorksheetsBGAS PART 2AB
Total questions: 25
Worksheet time: 13mins
Name
Class
Date
1.
Paint application is not permitted when the:
a)
A. Dew point in 3˚C more than the steel temperature.
b)
B. Air temperature is 5˚C less than steel temperature.
c)
C. Dew is 2˚C less than air temperature.
d)
D. Steel temperature is 2˚C more than air temperature
2.
Which grade of cleanliness requires a test for mill-scale?
a)
A. St3.
b)
B. Sa3.
c)
C. St2.
d)
D. Sa2.
3.
What the number 120 refer to when the grit size is G120?
a)
A. Grit with nominal size of 1/120th inch.
b)
B. Grit with nominal size of 1200 microns.
c)
C. Grit with nominal size of 120 thousand of an Inch.
d)
D. Grit with nominal size of 120 microns
4.
Which is a qualitative method?
a)
A. Comparator.
b)
B. Needle profile gauge.
c)
C. Merkoquant test.
d)
D. Replica tape.
5.
What is the definition of Sa2?
a)
A. Thorough hand and power tool cleaning.
b)
B. Very through blast cleaning.
c)
C. Very thorough hand and power tool cleaning.
d)
D. Thorough blast cleaning.
6.
What is the main disadvantage of a wheelabrator?
a)
A. low speed of abrasives.
b)
B. use of expendable abrasive.
c)
C. it isn’t safe for the operator.
d)
D. bolt holes, gussets and stiffeners aren’t accessible.
7.
You are using a whirling hygrometer and you observe that the wet and dry bulbs read the same temperature. This indicates:
a)
A. Extremely dry conditions.
b)
B. Humidity is saturated
c)
C. There is no water in the reservoir.
d)
D. B and C above
8.
A touch pyrometer is used for measuring:
a)
A. Relative humidity
b)
B. Air temperature
c)
C. Wind speed
d)
D. Metal temperature
9.
You observe that a contractor has purposefully missed out a paint coat, what action for you take?
a)
A. Stop the operation and report to the Engineer
b)
B. Re-train the operator
c)
C. Check the DFT and decide what to do
d)
D. Authorized a re-blast
10.
Which of the following is a description of rust grade A?
a)
A. Steel surface on which mill-scale can be scraped away and rust begins to show
b)
B. Steel surface on which mill-scale has flaked or can be scraped away with slight pitting visible under normal vision
c)
C. Steel surface largely covered with mill-scale with little if any rust
d)
D. Steel surface on which mill-scale has completely rusted away
11.
For which application should a SA3 grade of finish be achieved prior to painting?
a)
A. Steel
b)
B. Non-ferrous
c)
C. Damp surfaces
d)
D. Hot duties
12.
Which application generally required SA2 finished?
a)
A. steel
b)
B. non ferrous
c)
C. damaged surface
d)
D. none of the above
13.
Three metals used in cathodic protection is sacrificial anodes are:
a)
A. Zinc, lead, aluminium
b)
B. Zinc, magnesium, aluminium
c)
C. Lead, zinc, aluminium
d)
D. Manganese, copper, lead
14.
Moisture coating polyurethane shouldn’t be applied on
a)
A. damage condition
b)
B. moisture condition
c)
C. wet condition
d)
D. when relative humidity more than 90%
15.
In a three-coat paint system the coat providing thickness is the
a)
A. primer
b)
B. mid coat
c)
C. finish coat
d)
D. MIO
16.
When using a wet sponge, a tinning amount of detergent should be use for
a)
A. cleaning
b)
B. reducing surface tension
c)
C. preventing electrical short
d)
D. degreasing surface
17.
A low voltage wet sponge holiday detector is used for finding discontinuities
a)
A. conductive coating on non-conductive substrate
b)
B. non-conductive coating on conductive substrate
c)
C. non-conductive coating on non-conductive substrate
d)
D. conductive coating on conductive substrate
18.
What voltage would be used on a three-layer painted surface as primer 73µm, mid coat 125µm and finished coat 50µm with a sponge type pin hole detector?
a)
A. 9 volts
b)
B. 90 volts
c)
C. 15 KV
d)
D. 1 KV
19.
Bittiness is usually caused by:
a)
A. The paint lacking viscosity
b)
B. The paint being too viscous
c)
C. Contamination on the substrates
d)
D. Poor application
20.
Lack of observance of the stated over coating time is the main cause of:
a)
A. lifting
b)
B. wrinkling
c)
C. bleeding
d)
D. flaking
21.
What is the main reason for rash rusting:
a)
A. faulty application technique
b)
B. trapping solvent below the surface
c)
C. roque peaks
d)
D. escaping solvent or gases
22.
The viscosity of paint is measured to:
a)
A. determine the volume of paint
b)
B. see how much surface area can be covered by that volume of paint
c)
C. check the mix of multi-component paints
d)
D. check for the addition of thinners
23.
Which of the following is an accelerated test:
a)
A. temperature cycling
b)
B. abrasion resistance
c)
C. ballotini test
d)
D. thumbnail test
24.
Bleeding is the result of:
a)
A. Poor application
b)
B. Poor cleaning
c)
C. Too thick an application
d)
D. Incompatibility between paint coats
25.
Oxidizing paints are vulnerable to:
a)
A. Wrinkling
b)
B. Lifting
c)
C. Orange peeling
d)
D. Flaking
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