WLD402 - Fundamental Principles of Welding,
Cutting, Measurement, Flame Characteristics, and
Blueprint Interpretation
__ are numbers used to express units in increments of one, so they can be divided evenly by the
number one - Whole numbers✅✅✅
___ Lines are the lines extending from an object that locate the points being dimensioned -
Extension✅✅✅
___ Lines represent an imaginary cut through the object. They are used to expose the details of
internal parts that would not be shown clearly with hidden lines. - Cutting plan✅✅✅
___ show the center point of circles, arcs, round, or symmetrical objects. They also locate the
centerpoint for holes, your regular curves, and bolts - Center lines✅✅✅
____ cutting uses a stiff, highly ionized, extremely hot column of gas to almost instantly vaporized
the metal being cut. - Plasma arc✅✅✅
_____ are measurements containing numbers that are expressed in two or more different units - Mixed
units✅✅✅
_____ Lines are drawn so that their ends touch the object being measured, or they may touch the
extension line extending from the object being measured. - Dimension✅✅✅
_____ Lines show the edge of an object, the intersection of surfaces that form corners and edges, and
the extent of a curved surface, such as the sides of a cylinder - Object✅✅✅
_____ Point to a part to identify it, show the location, and or are the basis of a welding symbol -
Leaders and arrows✅✅✅
_____ uses units of degrees, minutes, seconds - Angular dimensions✅✅✅
_____ uses units of feet and inches - Linear dimensions✅✅✅
A ____ flame has an excess of fuel gas - Carburizing✅✅✅
A ____ is a number that uses a decimal point to denote a unit that is smaller than one - Decimal
fraction✅✅✅
, A ____ is two or more numbers used to express a unit smaller than one - Fraction✅✅✅
A _____ draws off excessive heat - Heat sink✅✅✅
A _____ flame is the most commonly used flame because it adds nothing to the weld metal -
Neutral✅✅✅
Acetylene is produced by mixing - Calcium carbide and water✅✅✅
Acetylene is unstable at pressure above _____ - 30✅✅✅
An _____ flame has an excess of oxygen - Oxidizing✅✅✅
As the diameter of the filler wire is decreased the heat absorbing affect _____, and the molten weld
pool becomes _____ - Decreases, wider✅✅✅
Because it is difficult for most manual welding to work with fractions smaller than ____ of an inch,
these smaller dimensions are not commonly used in fabrication. When they are used, it is most often
with some form of automated or machine welding or cutting process. - 1/16✅✅✅
For most soldered or braised joints, _____ is usually fairly low - Fatigue resistance✅✅✅
Gauges that do not read ___ when the pressure is released must be repaired or replaced - 0
psig✅✅✅
Hydrocarbons are made up of - Hydrogen and carbon✅✅✅
If more than one torch is to be used with a cylinder, the draw rates of the tips should be _____ to
obtain the number of cylinders that must be manifolded together. - Added✅✅✅
If the world is to be deposited on the other side of the joint, the weld symbol is placed _____ the
reference line - Above✅✅✅
Numbers in the ____ line or next to it give the size or length of an object - Dimension✅✅✅
Often the number of sparks in the air increases just before a _____ takes place - Burn
through✅✅✅
On thick metal, a _____ diameter filler rod may be used to ____ - Small, increase
penetration✅✅✅
Oxyacetylene welding is also referred to as - Gas welding or torch welding✅✅✅
Oxygen manifolds must be at least ___ feet away from fuel gas manifold - 20✅✅✅
Cutting, Measurement, Flame Characteristics, and
Blueprint Interpretation
__ are numbers used to express units in increments of one, so they can be divided evenly by the
number one - Whole numbers✅✅✅
___ Lines are the lines extending from an object that locate the points being dimensioned -
Extension✅✅✅
___ Lines represent an imaginary cut through the object. They are used to expose the details of
internal parts that would not be shown clearly with hidden lines. - Cutting plan✅✅✅
___ show the center point of circles, arcs, round, or symmetrical objects. They also locate the
centerpoint for holes, your regular curves, and bolts - Center lines✅✅✅
____ cutting uses a stiff, highly ionized, extremely hot column of gas to almost instantly vaporized
the metal being cut. - Plasma arc✅✅✅
_____ are measurements containing numbers that are expressed in two or more different units - Mixed
units✅✅✅
_____ Lines are drawn so that their ends touch the object being measured, or they may touch the
extension line extending from the object being measured. - Dimension✅✅✅
_____ Lines show the edge of an object, the intersection of surfaces that form corners and edges, and
the extent of a curved surface, such as the sides of a cylinder - Object✅✅✅
_____ Point to a part to identify it, show the location, and or are the basis of a welding symbol -
Leaders and arrows✅✅✅
_____ uses units of degrees, minutes, seconds - Angular dimensions✅✅✅
_____ uses units of feet and inches - Linear dimensions✅✅✅
A ____ flame has an excess of fuel gas - Carburizing✅✅✅
A ____ is a number that uses a decimal point to denote a unit that is smaller than one - Decimal
fraction✅✅✅
, A ____ is two or more numbers used to express a unit smaller than one - Fraction✅✅✅
A _____ draws off excessive heat - Heat sink✅✅✅
A _____ flame is the most commonly used flame because it adds nothing to the weld metal -
Neutral✅✅✅
Acetylene is produced by mixing - Calcium carbide and water✅✅✅
Acetylene is unstable at pressure above _____ - 30✅✅✅
An _____ flame has an excess of oxygen - Oxidizing✅✅✅
As the diameter of the filler wire is decreased the heat absorbing affect _____, and the molten weld
pool becomes _____ - Decreases, wider✅✅✅
Because it is difficult for most manual welding to work with fractions smaller than ____ of an inch,
these smaller dimensions are not commonly used in fabrication. When they are used, it is most often
with some form of automated or machine welding or cutting process. - 1/16✅✅✅
For most soldered or braised joints, _____ is usually fairly low - Fatigue resistance✅✅✅
Gauges that do not read ___ when the pressure is released must be repaired or replaced - 0
psig✅✅✅
Hydrocarbons are made up of - Hydrogen and carbon✅✅✅
If more than one torch is to be used with a cylinder, the draw rates of the tips should be _____ to
obtain the number of cylinders that must be manifolded together. - Added✅✅✅
If the world is to be deposited on the other side of the joint, the weld symbol is placed _____ the
reference line - Above✅✅✅
Numbers in the ____ line or next to it give the size or length of an object - Dimension✅✅✅
Often the number of sparks in the air increases just before a _____ takes place - Burn
through✅✅✅
On thick metal, a _____ diameter filler rod may be used to ____ - Small, increase
penetration✅✅✅
Oxyacetylene welding is also referred to as - Gas welding or torch welding✅✅✅
Oxygen manifolds must be at least ___ feet away from fuel gas manifold - 20✅✅✅
