MSSC - MAINTENANCE AWARENESS
EXAM QUESTIONS AND ANSWERS 2026
VERIFIED.
Torches are designed to avoid mixing oxygen and acetylene by using __________. -
ANS Reverse-flow check valves at torch inlets or regulator outlets
To prevent leakage around the valve during use, __________ - ANS An oxygen cylinder valve
should be opened all the way
An explosion can occur if __________ comes in contact with oil. - ANS High pressure oxygen
A green welding hose normally indicates that this hose carries __________. - ANS Oxygen
A __________ is a non-destructive test that uses a colored spray to reveal imperfections in a
weld. - ANS dye-penetrant test
A red welding hose indicates that this hose carries __________. - ANS acetylene
When using the __________ in welding, the electrode should be leaned 15 to 25 degrees in the
direction of travel. - ANS pull technique
@2026/2027 ALLRIGHTS RESERVED.
,__________ metal is a metal similar in composition to the metal being joined. It strengthens the
weld by filling the gap created between the two pieces of metal during welding. - ANS Filler
Metals treated by __________ processes become soft. - ANS annealing
Oxy-acetylene welding requires no __________ and is not sensitive to wind or drafts like Gas
Metallic Arc Welding or Gas Tungsten Arc Welding. - ANS electricity
A magnaflux test is used to show what flaw in ferrous metal? - ANS Cracks in the surface
A spot welding system consists of an electrical supply, moveable arm, and a(n) __________. -
ANS stationary arm
What device should be stored a minimum of 20 feet from flammable materials? -
ANS Oxygen Cylinders
The gas metal arc welding (GMAW) process uses __________ to melt metal wire and fuse it
with the base metal being welded. - ANS Electricity
Circuit testers determine if __________ electricity is present. - ANS AC
A knife switch consists of a lever and one or more sets of __________. - ANS contacts
The component of an electrical circuit that gives the operator control is the __________. -
ANS input device
@2026/2027 ALLRIGHTS RESERVED.
, The type of current that only flows in one direction is __________. - ANS DC
Constant voltage power supplies will maintain a constant voltage under varying __________. -
ANS loads
10mA would be an example of __________ value. - ANS current
A(n) __________ is used to measure resistance. - ANS ohmmeter
Voltage is a(an) electrical __________. - ANS force
If a wire has continuity, it__________. - ANS will have almost no resistance
Current in a __________ circuit is divided among the branches of the circuit. - ANS parallel
As branches are added to a parallel circuit the resistance __________. - ANS decreases
A multimeter is a multipurpose device that can measure _________. - ANS voltage, current,
and resistance
In a parallel circuit with a constant voltage power supply, the voltage drop across each branch is
__________. - ANS equal to the power supply voltage
A(n) __________ circuit is one in which there is more than one path for current to travel. -
ANS parallel
@2026/2027 ALLRIGHTS RESERVED.
EXAM QUESTIONS AND ANSWERS 2026
VERIFIED.
Torches are designed to avoid mixing oxygen and acetylene by using __________. -
ANS Reverse-flow check valves at torch inlets or regulator outlets
To prevent leakage around the valve during use, __________ - ANS An oxygen cylinder valve
should be opened all the way
An explosion can occur if __________ comes in contact with oil. - ANS High pressure oxygen
A green welding hose normally indicates that this hose carries __________. - ANS Oxygen
A __________ is a non-destructive test that uses a colored spray to reveal imperfections in a
weld. - ANS dye-penetrant test
A red welding hose indicates that this hose carries __________. - ANS acetylene
When using the __________ in welding, the electrode should be leaned 15 to 25 degrees in the
direction of travel. - ANS pull technique
@2026/2027 ALLRIGHTS RESERVED.
,__________ metal is a metal similar in composition to the metal being joined. It strengthens the
weld by filling the gap created between the two pieces of metal during welding. - ANS Filler
Metals treated by __________ processes become soft. - ANS annealing
Oxy-acetylene welding requires no __________ and is not sensitive to wind or drafts like Gas
Metallic Arc Welding or Gas Tungsten Arc Welding. - ANS electricity
A magnaflux test is used to show what flaw in ferrous metal? - ANS Cracks in the surface
A spot welding system consists of an electrical supply, moveable arm, and a(n) __________. -
ANS stationary arm
What device should be stored a minimum of 20 feet from flammable materials? -
ANS Oxygen Cylinders
The gas metal arc welding (GMAW) process uses __________ to melt metal wire and fuse it
with the base metal being welded. - ANS Electricity
Circuit testers determine if __________ electricity is present. - ANS AC
A knife switch consists of a lever and one or more sets of __________. - ANS contacts
The component of an electrical circuit that gives the operator control is the __________. -
ANS input device
@2026/2027 ALLRIGHTS RESERVED.
, The type of current that only flows in one direction is __________. - ANS DC
Constant voltage power supplies will maintain a constant voltage under varying __________. -
ANS loads
10mA would be an example of __________ value. - ANS current
A(n) __________ is used to measure resistance. - ANS ohmmeter
Voltage is a(an) electrical __________. - ANS force
If a wire has continuity, it__________. - ANS will have almost no resistance
Current in a __________ circuit is divided among the branches of the circuit. - ANS parallel
As branches are added to a parallel circuit the resistance __________. - ANS decreases
A multimeter is a multipurpose device that can measure _________. - ANS voltage, current,
and resistance
In a parallel circuit with a constant voltage power supply, the voltage drop across each branch is
__________. - ANS equal to the power supply voltage
A(n) __________ circuit is one in which there is more than one path for current to travel. -
ANS parallel
@2026/2027 ALLRIGHTS RESERVED.
