BGAS PART 2AB

Paint application is not permitted when the:

• A.     Dew point in 3˚C more than the steel temperature.
• B.     Air temperature is 5˚C less than steel temperature.
• C.    Dew is 2˚C less than air temperature.
• D.    Steel temperature is 2˚C more than air temperature

Which grade of cleanliness requires a test for mill-scale?

• A.     St3.
• B.     Sa3.
• C.     St2.
• D.     Sa2.

What the number 120 refer to when the grit size is G120?

• A.     Grit with nominal size of 1/120th inch.
• B.     Grit with nominal size of 1200 microns.
• C.    Grit with nominal size of 120 thousand of an Inch.
• D.    Grit with nominal size of 120 microns

Which is a qualitative method?

• A.     Comparator.
• B.     Needle profile gauge.
• C.     Merkoquant test.
• D.     Replica tape.

What is the definition of Sa2?

• A.     Thorough hand and power tool cleaning.
• B.     Very through blast cleaning.
• C.     Very thorough hand and power tool cleaning.
• D.     Thorough blast cleaning.

What is the main disadvantage of a wheelabrator?

• A.  low speed of abrasives.
• B.  use of expendable abrasive.
• C.  it isn’t safe for the operator.
• D.  bolt holes, gussets and stiffeners aren’t accessible.

You are using a whirling hygrometer and you observe that the wet and dry bulbs read the same temperature. This indicates:

• A.  Extremely dry conditions.
• B.  Humidity is saturated
• C.  There is no water in the reservoir.
• D.  B and C above

A touch pyrometer is used for measuring:

• A.  Relative humidity
• B.  Air temperature
• C.  Wind speed
• D.  Metal temperature

You observe that a contractor has purposefully missed out a paint coat, what action for you take?

• A.  Stop the operation and report to the Engineer
• B.  Re-train the operator
• C.  Check the DFT and decide what to do
• D.  Authorized a re-blast

Which of the following is a description of rust grade A?

• A.   Steel surface on which mill-scale can be scraped away and rust begins to show
• B. Steel surface on which mill-scale has flaked or can be scraped away with slight pitting visible under normal vision
• C.  Steel surface largely covered with mill-scale with little if any rust
• D.  Steel surface on which mill-scale has completely rusted away