MSSC - Maintenance Awareness Exam Questions and Answers Latest Update 2025
Torches are designed to avoid mixing oxygen and acetylene by using __________. - Answers Reverse-
flow check valves at torch inlets or regulator outlets
To prevent leakage around the valve during use, __________ - Answers An oxygen cylinder valve should
be opened all the way
An explosion can occur if __________ comes in contact with oil. - Answers High pressure oxygen
A green welding hose normally indicates that this hose carries __________. - Answers Oxygen
A __________ is a non-destructive test that uses a colored spray to reveal imperfections in a weld. -
Answers dye-penetrant test
A red welding hose indicates that this hose carries __________. - Answers acetylene
When using the __________ in welding, the electrode should be leaned 15 to 25 degrees in the
direction of travel. - Answers 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. - Answers Filler
Metals treated by __________ processes become soft. - Answers annealing
Oxy-acetylene welding requires no __________ and is not sensitive to wind or drafts like Gas Metallic
Arc Welding or Gas Tungsten Arc Welding. - Answers electricity
A magnaflux test is used to show what flaw in ferrous metal? - Answers Cracks in the surface
A spot welding system consists of an electrical supply, moveable arm, and a(n) __________. - Answers
stationary arm
What device should be stored a minimum of 20 feet from flammable materials? - Answers Oxygen
Cylinders
The gas metal arc welding (GMAW) process uses __________ to melt metal wire and fuse it with the
base metal being welded. - Answers Electricity
Circuit testers determine if __________ electricity is present. - Answers AC
A knife switch consists of a lever and one or more sets of __________. - Answers contacts
The component of an electrical circuit that gives the operator control is the __________. - Answers input
device
The type of current that only flows in one direction is __________. - Answers DC
, Constant voltage power supplies will maintain a constant voltage under varying __________. - Answers
loads
10mA would be an example of __________ value. - Answers current
A(n) __________ is used to measure resistance. - Answers ohmmeter
Voltage is a(an) electrical __________. - Answers force
If a wire has continuity, it__________. - Answers will have almost no resistance
Current in a __________ circuit is divided among the branches of the circuit. - Answers parallel
As branches are added to a parallel circuit the resistance __________. - Answers decreases
A multimeter is a multipurpose device that can measure _________. - Answers voltage, current, and
resistance
In a parallel circuit with a constant voltage power supply, the voltage drop across each branch is
__________. - Answers equal to the power supply voltage
A(n) __________ circuit is one in which there is more than one path for current to travel. - Answers
parallel
An ammeter is used to measure __________. - Answers current
The two ways to measure voltage are __________ and __________. - Answers across a component,
from a reference
Both analog and digital voltmeters measure __________. - Answers potential difference
When current in a circuit is too high, it is usually the result of too many loads or a __________. -
Answers short circuit
Electrical wiring that runs in exposed locations must be protected by pipe or tubing called __________. -
Answers conduit
The total power in __________ electrical circuit is calculated by finding the sum of the individual
component power consumption. - Answers any
The amount two electrical waveforms are out of phase is measured in __________. - Answers degrees
The Ohm's Law formula for calculating voltage is __________. - Answers E=I(current)*R(resistance)
What is the power formula? - Answers P = I(current)*E(voltage)
The type of overload protection that protects the motor by disconnecting it physically instead of
electrically is a(n) __________. - Answers overload clutch
Torches are designed to avoid mixing oxygen and acetylene by using __________. - Answers Reverse-
flow check valves at torch inlets or regulator outlets
To prevent leakage around the valve during use, __________ - Answers An oxygen cylinder valve should
be opened all the way
An explosion can occur if __________ comes in contact with oil. - Answers High pressure oxygen
A green welding hose normally indicates that this hose carries __________. - Answers Oxygen
A __________ is a non-destructive test that uses a colored spray to reveal imperfections in a weld. -
Answers dye-penetrant test
A red welding hose indicates that this hose carries __________. - Answers acetylene
When using the __________ in welding, the electrode should be leaned 15 to 25 degrees in the
direction of travel. - Answers 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. - Answers Filler
Metals treated by __________ processes become soft. - Answers annealing
Oxy-acetylene welding requires no __________ and is not sensitive to wind or drafts like Gas Metallic
Arc Welding or Gas Tungsten Arc Welding. - Answers electricity
A magnaflux test is used to show what flaw in ferrous metal? - Answers Cracks in the surface
A spot welding system consists of an electrical supply, moveable arm, and a(n) __________. - Answers
stationary arm
What device should be stored a minimum of 20 feet from flammable materials? - Answers Oxygen
Cylinders
The gas metal arc welding (GMAW) process uses __________ to melt metal wire and fuse it with the
base metal being welded. - Answers Electricity
Circuit testers determine if __________ electricity is present. - Answers AC
A knife switch consists of a lever and one or more sets of __________. - Answers contacts
The component of an electrical circuit that gives the operator control is the __________. - Answers input
device
The type of current that only flows in one direction is __________. - Answers DC
, Constant voltage power supplies will maintain a constant voltage under varying __________. - Answers
loads
10mA would be an example of __________ value. - Answers current
A(n) __________ is used to measure resistance. - Answers ohmmeter
Voltage is a(an) electrical __________. - Answers force
If a wire has continuity, it__________. - Answers will have almost no resistance
Current in a __________ circuit is divided among the branches of the circuit. - Answers parallel
As branches are added to a parallel circuit the resistance __________. - Answers decreases
A multimeter is a multipurpose device that can measure _________. - Answers voltage, current, and
resistance
In a parallel circuit with a constant voltage power supply, the voltage drop across each branch is
__________. - Answers equal to the power supply voltage
A(n) __________ circuit is one in which there is more than one path for current to travel. - Answers
parallel
An ammeter is used to measure __________. - Answers current
The two ways to measure voltage are __________ and __________. - Answers across a component,
from a reference
Both analog and digital voltmeters measure __________. - Answers potential difference
When current in a circuit is too high, it is usually the result of too many loads or a __________. -
Answers short circuit
Electrical wiring that runs in exposed locations must be protected by pipe or tubing called __________. -
Answers conduit
The total power in __________ electrical circuit is calculated by finding the sum of the individual
component power consumption. - Answers any
The amount two electrical waveforms are out of phase is measured in __________. - Answers degrees
The Ohm's Law formula for calculating voltage is __________. - Answers E=I(current)*R(resistance)
What is the power formula? - Answers P = I(current)*E(voltage)
The type of overload protection that protects the motor by disconnecting it physically instead of
electrically is a(n) __________. - Answers overload clutch
