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