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ABSA 4TH CLASS PART A
REVIEW|COMPREHENSIVE Q&A FOR
CERTIFICATION SUCCESS
An open loop control system requires:
Select one:
a. A transducer and a recorder
b. More accurate sensing devices
c. A very small amount of dead time or lag
d. Constant operator attention - correct-answer - d. Constant operator attention
Section lines of a drawing that show the material of construction are usually
drawn at an angle of: Select one:
a. 90°
b. 30°
c. 45°
d. 60° - correct-answer - c. 45°
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When using radiographic inspection, defects such as cracks and porosity show up
as:
Select one:
a. Lighter shadows on the photographic paper
b. Wave signals on a small screen
c. Darker shadows on the penetrameter
d. Darker shadows on the photographic paper - correct-answer - d. Darker
shadows on the photographic paper
Beading the tube ends in a firetube boiler:
Select one:
a. stops tube leakage
b. eliminates the need to expand the tubes into the tubesheet
c. helps prevent overheating of the tube ends
d. must be followed by seal welding - correct-answer - c. helps prevent
overheating of the tube ends
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If an electrical _____ is placed across a conductor, the electrons will drift from the
negative end towards the positive end of the conductor.
Select one:
a. Potential
b. Current
c. Resistance
d. Wire - correct-answer - a. Potential
If a welding electrode has the identifying number "E6016", what does the "1"
represent.
Select one:
a. The welding position
b. AC or DC with medium penetration
c. DC reverse polarity with medium penetration
d. AC with deep penetration - correct-answer - a. The welding position
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In order to avoid residual stresses after welding, alloy steels:
Select one:
a. Cannot contain any copper
b. Must contain copper
c. Should be heated before, during and after welding
d. Must be heated after welding - correct-answer - c. Should be heated before,
during and after welding
Which of the following statements is TRUE?
Select one:
a. In general, coefficients of expansion of solids are greater than those of liquids.
b. Liquids do not contract when cooled.
c. The Coefficient of Expansion for a liquid changes if the liquid temperature
changes
d. Solids contract when heated.
ABSA 4TH CLASS PART A
REVIEW|COMPREHENSIVE Q&A FOR
CERTIFICATION SUCCESS
An open loop control system requires:
Select one:
a. A transducer and a recorder
b. More accurate sensing devices
c. A very small amount of dead time or lag
d. Constant operator attention - correct-answer - d. Constant operator attention
Section lines of a drawing that show the material of construction are usually
drawn at an angle of: Select one:
a. 90°
b. 30°
c. 45°
d. 60° - correct-answer - c. 45°
,2|Page
When using radiographic inspection, defects such as cracks and porosity show up
as:
Select one:
a. Lighter shadows on the photographic paper
b. Wave signals on a small screen
c. Darker shadows on the penetrameter
d. Darker shadows on the photographic paper - correct-answer - d. Darker
shadows on the photographic paper
Beading the tube ends in a firetube boiler:
Select one:
a. stops tube leakage
b. eliminates the need to expand the tubes into the tubesheet
c. helps prevent overheating of the tube ends
d. must be followed by seal welding - correct-answer - c. helps prevent
overheating of the tube ends
,3|Page
If an electrical _____ is placed across a conductor, the electrons will drift from the
negative end towards the positive end of the conductor.
Select one:
a. Potential
b. Current
c. Resistance
d. Wire - correct-answer - a. Potential
If a welding electrode has the identifying number "E6016", what does the "1"
represent.
Select one:
a. The welding position
b. AC or DC with medium penetration
c. DC reverse polarity with medium penetration
d. AC with deep penetration - correct-answer - a. The welding position
, 4|Page
In order to avoid residual stresses after welding, alloy steels:
Select one:
a. Cannot contain any copper
b. Must contain copper
c. Should be heated before, during and after welding
d. Must be heated after welding - correct-answer - c. Should be heated before,
during and after welding
Which of the following statements is TRUE?
Select one:
a. In general, coefficients of expansion of solids are greater than those of liquids.
b. Liquids do not contract when cooled.
c. The Coefficient of Expansion for a liquid changes if the liquid temperature
changes
d. Solids contract when heated.
