MSSC MAINTENANCE AWARENESS EXAM ACTUAL
EXAM 300 QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES (VERIFIED ANSWERS)|
AGRADE
Torches are designed to avoid mixing oxygen and acetylene by using __________. -
ANSWER: Reverse-flow check valves at torch inlets or regulator outlets
To prevent leakage around the valve during use, __________ - ANSWER: An oxygen
cylinder valve should be opened all the way
An explosion can occur if __________ comes in contact with oil. - ANSWER: High
pressure oxygen
A green welding hose normally indicates that this hose carries __________. -
ANSWER: Oxygen
A __________ is a non-destructive test that uses a colored spray to reveal
imperfections in a weld. - ANSWER: dye-penetrant test
A red welding hose indicates that this hose carries __________. - ANSWER: acetylene
When using the __________ in welding, the electrode should be leaned 15 to 25
degrees in the direction of travel. - ANSWER: pull technique
__________ 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. - ANSWER: Filler
Metals treated by __________ processes become soft. - ANSWER: annealing
Oxy-acetylene welding requires no __________ and is not sensitive to wind or drafts
like Gas Metallic Arc Welding or Gas Tungsten Arc Welding. - ANSWER: electricity
A magnaflux test is used to show what flaw in ferrous metal? - ANSWER: Cracks in
the surface
A spot welding system consists of an electrical supply, moveable arm, and a(n)
__________. - ANSWER: stationary arm
What device should be stored a minimum of 20 feet from flammable materials? -
ANSWER: Oxygen Cylinders
The gas metal arc welding (GMAW) process uses __________ to melt metal wire and
fuse it with the base metal being welded. - ANSWER: Electricity
, Circuit testers determine if __________ electricity is present. - ANSWER: AC
A knife switch consists of a lever and one or more sets of __________. - ANSWER:
contacts
The component of an electrical circuit that gives the operator control is the
__________. - ANSWER: input device
The type of current that only flows in one direction is __________. - ANSWER: DC
Constant voltage power supplies will maintain a constant voltage under varying
__________. - ANSWER: loads
10mA would be an example of __________ value. - ANSWER: current
A(n) __________ is used to measure resistance. - ANSWER: ohmmeter
Voltage is a(an) electrical __________. - ANSWER: force
If a wire has continuity, it__________. - ANSWER: will have almost no resistance
Current in a __________ circuit is divided among the branches of the circuit. -
ANSWER: parallel
As branches are added to a parallel circuit the resistance __________. - ANSWER:
decreases
A multimeter is a multipurpose device that can measure _________. - ANSWER:
voltage, current, and resistance
In a parallel circuit with a constant voltage power supply, the voltage drop across
each branch is __________. - ANSWER: equal to the power supply voltage
A(n) __________ circuit is one in which there is more than one path for current to
travel. - ANSWER: parallel
An ammeter is used to measure __________. - ANSWER: current
The two ways to measure voltage are __________ and __________. - ANSWER:
across a component, from a reference
Both analog and digital voltmeters measure __________. - ANSWER: potential
difference
When current in a circuit is too high, it is usually the result of too many loads or a
__________. - ANSWER: short circuit
EXAM 300 QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES (VERIFIED ANSWERS)|
AGRADE
Torches are designed to avoid mixing oxygen and acetylene by using __________. -
ANSWER: Reverse-flow check valves at torch inlets or regulator outlets
To prevent leakage around the valve during use, __________ - ANSWER: An oxygen
cylinder valve should be opened all the way
An explosion can occur if __________ comes in contact with oil. - ANSWER: High
pressure oxygen
A green welding hose normally indicates that this hose carries __________. -
ANSWER: Oxygen
A __________ is a non-destructive test that uses a colored spray to reveal
imperfections in a weld. - ANSWER: dye-penetrant test
A red welding hose indicates that this hose carries __________. - ANSWER: acetylene
When using the __________ in welding, the electrode should be leaned 15 to 25
degrees in the direction of travel. - ANSWER: pull technique
__________ 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. - ANSWER: Filler
Metals treated by __________ processes become soft. - ANSWER: annealing
Oxy-acetylene welding requires no __________ and is not sensitive to wind or drafts
like Gas Metallic Arc Welding or Gas Tungsten Arc Welding. - ANSWER: electricity
A magnaflux test is used to show what flaw in ferrous metal? - ANSWER: Cracks in
the surface
A spot welding system consists of an electrical supply, moveable arm, and a(n)
__________. - ANSWER: stationary arm
What device should be stored a minimum of 20 feet from flammable materials? -
ANSWER: Oxygen Cylinders
The gas metal arc welding (GMAW) process uses __________ to melt metal wire and
fuse it with the base metal being welded. - ANSWER: Electricity
, Circuit testers determine if __________ electricity is present. - ANSWER: AC
A knife switch consists of a lever and one or more sets of __________. - ANSWER:
contacts
The component of an electrical circuit that gives the operator control is the
__________. - ANSWER: input device
The type of current that only flows in one direction is __________. - ANSWER: DC
Constant voltage power supplies will maintain a constant voltage under varying
__________. - ANSWER: loads
10mA would be an example of __________ value. - ANSWER: current
A(n) __________ is used to measure resistance. - ANSWER: ohmmeter
Voltage is a(an) electrical __________. - ANSWER: force
If a wire has continuity, it__________. - ANSWER: will have almost no resistance
Current in a __________ circuit is divided among the branches of the circuit. -
ANSWER: parallel
As branches are added to a parallel circuit the resistance __________. - ANSWER:
decreases
A multimeter is a multipurpose device that can measure _________. - ANSWER:
voltage, current, and resistance
In a parallel circuit with a constant voltage power supply, the voltage drop across
each branch is __________. - ANSWER: equal to the power supply voltage
A(n) __________ circuit is one in which there is more than one path for current to
travel. - ANSWER: parallel
An ammeter is used to measure __________. - ANSWER: current
The two ways to measure voltage are __________ and __________. - ANSWER:
across a component, from a reference
Both analog and digital voltmeters measure __________. - ANSWER: potential
difference
When current in a circuit is too high, it is usually the result of too many loads or a
__________. - ANSWER: short circuit
