4TH CLASS ABSA EXAMINATION TEST
2026 COMPREHENSIVE Q&A STUDY GUIDE
◉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. 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. Answer: c. helps prevent
overheating of the tube ends
,◉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. 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. Answer: a. The welding position
◉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. 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.
e. Water will only expand when its temperature is increased..
Answer: c. The Coefficient of Expansion for a liquid changes if the
liquid temperature changes
◉The filler rod in braze welding is usually made of:
Select one:
a. Alloy steel
b. Brass
c. Aluminium
d. Bronze. Answer: d. Bronze
◉Dewatering of liquid waste is an example of:
, Select one:
a. a conversion method of waste disposal.
b. a disposal method of waste handling.
c. a chemical treatment of the waste.
d. a physical treatment of the waste.. Answer: d. a physical treatment
of the waste.
◉A copper alloy that contains tin, and sometimes zinc, is:
Select one:
a. Brass
b. Bronze
c. White metal
d. Babbit. Answer: b. Bronze
◉Push nipples:
Select one:
a. Connect radiator sections together
b. Are tapered in the middle
c. Are used to connect pipes together in a heating system
d. seal tighter than unions
e. Have decreasing cross-sectional areas from one end to the other.
Answer: a. Connect radiator sections together
2026 COMPREHENSIVE Q&A STUDY GUIDE
◉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. 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. Answer: c. helps prevent
overheating of the tube ends
,◉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. 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. Answer: a. The welding position
◉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. 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.
e. Water will only expand when its temperature is increased..
Answer: c. The Coefficient of Expansion for a liquid changes if the
liquid temperature changes
◉The filler rod in braze welding is usually made of:
Select one:
a. Alloy steel
b. Brass
c. Aluminium
d. Bronze. Answer: d. Bronze
◉Dewatering of liquid waste is an example of:
, Select one:
a. a conversion method of waste disposal.
b. a disposal method of waste handling.
c. a chemical treatment of the waste.
d. a physical treatment of the waste.. Answer: d. a physical treatment
of the waste.
◉A copper alloy that contains tin, and sometimes zinc, is:
Select one:
a. Brass
b. Bronze
c. White metal
d. Babbit. Answer: b. Bronze
◉Push nipples:
Select one:
a. Connect radiator sections together
b. Are tapered in the middle
c. Are used to connect pipes together in a heating system
d. seal tighter than unions
e. Have decreasing cross-sectional areas from one end to the other.
Answer: a. Connect radiator sections together
