LSU CM 2112 FINAL ALI. EXAM
QUESTIONS AND ANSWERS 100% PASS
2026 EDITION
Which of the followings is not a common non-destructive test for welds? - ANS Schmidt
hammer
What is the most commonly used gas in gas welding? - ANS Acetylene
(Gas welding) By varying the ratio of oxygen to acetylene in the gas mixture supplied by the
torch it is possible to vary the efficiency of the combustion and alter the nature of the flame. If
the oxygen supply is slightly greater than the supply of acetylene by volume, what is known as
....... is resulted. - ANS An "oxidizing" flame
Laser beam welding is - ANS A process that fuses materials with the heat from a
concentrated coherent beam impinging upon the members to be joined
Which of the followings is NOT accurate? - ANS Gas welding refers to a group of welding
processes which produces coalescence of metals by heating them with an arc.
(shipbuilding) It is easier to obtain watertightness and oiltightness with welded joints, compared
to riveting. - ANS True
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, Friction Stir Welding is a solid-state welding process which produces coalescence of material by
the heat obtained from a mechanically induced rotating motion between tightly butted
surfaces. - ANS True
Gas welding, arc welding, and resistance welding all provide heat sources of sufficient intensity
to achieve fusion welds - ANS True
Oxy-acetylene welding tends to be faster than other fusion welding processes because the
process temperature is high in comparison with the melting temperature of the metal. -
ANS False
Water jet cutting is based on concentrated water jet, with or without abrasive, which is released
from a nozzle at a pressure level of several thousands bar. Water jet cutting can be used on
steels too. - ANS True
Any polymer consisting of a chain of organic units joined by urethane links: -
ANS Polyurethane
In its simplest form a furnace consists of a...., to provide the process energy. - ANS casing
with a heat source
(Monolithic linings) Castable refractory consists of ... - ANS a graded refractory material and a
bonding agent
Forming a conversion coating on a metal surface by anodic oxidation is called ..... -
ANS Anodizing
(corrosion prevention by paints) The potential life of a protective system is unlikely to be
realized unless: - ANS All of the above
Alkaline refers to the properties of an alkali, and a pH greater than 8. - ANS False
@COPYRIGHT 2026 ALLRIGHTS RESERVED 2
QUESTIONS AND ANSWERS 100% PASS
2026 EDITION
Which of the followings is not a common non-destructive test for welds? - ANS Schmidt
hammer
What is the most commonly used gas in gas welding? - ANS Acetylene
(Gas welding) By varying the ratio of oxygen to acetylene in the gas mixture supplied by the
torch it is possible to vary the efficiency of the combustion and alter the nature of the flame. If
the oxygen supply is slightly greater than the supply of acetylene by volume, what is known as
....... is resulted. - ANS An "oxidizing" flame
Laser beam welding is - ANS A process that fuses materials with the heat from a
concentrated coherent beam impinging upon the members to be joined
Which of the followings is NOT accurate? - ANS Gas welding refers to a group of welding
processes which produces coalescence of metals by heating them with an arc.
(shipbuilding) It is easier to obtain watertightness and oiltightness with welded joints, compared
to riveting. - ANS True
@COPYRIGHT 2026 ALLRIGHTS RESERVED 1
, Friction Stir Welding is a solid-state welding process which produces coalescence of material by
the heat obtained from a mechanically induced rotating motion between tightly butted
surfaces. - ANS True
Gas welding, arc welding, and resistance welding all provide heat sources of sufficient intensity
to achieve fusion welds - ANS True
Oxy-acetylene welding tends to be faster than other fusion welding processes because the
process temperature is high in comparison with the melting temperature of the metal. -
ANS False
Water jet cutting is based on concentrated water jet, with or without abrasive, which is released
from a nozzle at a pressure level of several thousands bar. Water jet cutting can be used on
steels too. - ANS True
Any polymer consisting of a chain of organic units joined by urethane links: -
ANS Polyurethane
In its simplest form a furnace consists of a...., to provide the process energy. - ANS casing
with a heat source
(Monolithic linings) Castable refractory consists of ... - ANS a graded refractory material and a
bonding agent
Forming a conversion coating on a metal surface by anodic oxidation is called ..... -
ANS Anodizing
(corrosion prevention by paints) The potential life of a protective system is unlikely to be
realized unless: - ANS All of the above
Alkaline refers to the properties of an alkali, and a pH greater than 8. - ANS False
@COPYRIGHT 2026 ALLRIGHTS RESERVED 2
