Page |1
POWER ENGINEERING 2A1 | COMPLETE
QUESTIONS AND 100% VERIFIED
ANSWERS | LATEST UPDATE 2025
What are the units for gas law calculations? - CORRECT-ANSWER-The
units must always be in absolute pressure (not gauge pressure) and in
degrees Kelvin.
What is the ideal gas law? - CORRECT-ANSWER-The ideal gas law
represents the relationship among pressure, volume and temperature
that includes the mass of the substance.
PV=mRT
Define a perfect gas - CORRECT-ANSWER-A perfect gas is a gas which is
sufficiently removed from its condensation temperature that it will
remain in its gaseous state when subjected to changes of temperature
and pressure of the operation being considered.
, Page |2
The relationship between temperature, pressure and volume is
consistent throughout a selected working range. The behavior of a
perfect gas can be used as a model for the behavior of real gases.
When are groove welds used? - CORRECT-ANSWER-They are used
when the surfaces being joined are butted against each other in such a
way that a groove is created.
What are some standard groove shapes? - CORRECT-ANSWER--V
-Double V
-Bevel
-Square
-U
-Double U
-J
-Scarf (The joined edges are machined flat but at an angle, common for
brazing)
-Flare-v
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-Flare bevel
Define the following terms: Weld root, root opening, weld depth,
reinforcement and melt through - CORRECT-ANSWER-Weld root - the
bottom edge of a weld or the deepest point of a weld
Root opening - the space intentionally left between joined surfaces
before welding.
Weld depth - the distance from the surface of the material to the root
of the weld
Reinforcement - the specified height of the weld above the surface of
the material
Melt through - the thickness of the weld, measured from the root of
the weld to the material surface, when the root extends beyond the
surface. This is often intentional for reinforcing the weld.
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What is a fillet weld? - CORRECT-ANSWER-A fillet weld is a weld of
approximately triangular cross section that two surfaces at
approximately right angles.
What it a box weld and another term for it? - CORRECT-ANSWER-It is a
continuous fillet weld, used to weld a vertical post to a flat plate. It is
also called an all-around weld.
What type of weld is used when the strength of the joint is not crucial
or complete sealing of the joint is not necessary? - CORRECT-ANSWER-
Staggered intermittent fillet welds. In order to successfully produce
these welds, the welder must know the length of the individual welds
and the pitch. The pitch is the distance between the mid point of the
adjacent welds. In many cases the intermittent welds are not
staggered, but directly across from each other, with identical length
and pitch.
What is a plug or slot weld? - CORRECT-ANSWER-This involves joining
two relatively flat pieces with a series of small welds that are deposited
into drilled plugs or machined slots into on piece. The piece with the
POWER ENGINEERING 2A1 | COMPLETE
QUESTIONS AND 100% VERIFIED
ANSWERS | LATEST UPDATE 2025
What are the units for gas law calculations? - CORRECT-ANSWER-The
units must always be in absolute pressure (not gauge pressure) and in
degrees Kelvin.
What is the ideal gas law? - CORRECT-ANSWER-The ideal gas law
represents the relationship among pressure, volume and temperature
that includes the mass of the substance.
PV=mRT
Define a perfect gas - CORRECT-ANSWER-A perfect gas is a gas which is
sufficiently removed from its condensation temperature that it will
remain in its gaseous state when subjected to changes of temperature
and pressure of the operation being considered.
, Page |2
The relationship between temperature, pressure and volume is
consistent throughout a selected working range. The behavior of a
perfect gas can be used as a model for the behavior of real gases.
When are groove welds used? - CORRECT-ANSWER-They are used
when the surfaces being joined are butted against each other in such a
way that a groove is created.
What are some standard groove shapes? - CORRECT-ANSWER--V
-Double V
-Bevel
-Square
-U
-Double U
-J
-Scarf (The joined edges are machined flat but at an angle, common for
brazing)
-Flare-v
, Page |3
-Flare bevel
Define the following terms: Weld root, root opening, weld depth,
reinforcement and melt through - CORRECT-ANSWER-Weld root - the
bottom edge of a weld or the deepest point of a weld
Root opening - the space intentionally left between joined surfaces
before welding.
Weld depth - the distance from the surface of the material to the root
of the weld
Reinforcement - the specified height of the weld above the surface of
the material
Melt through - the thickness of the weld, measured from the root of
the weld to the material surface, when the root extends beyond the
surface. This is often intentional for reinforcing the weld.
, Page |4
What is a fillet weld? - CORRECT-ANSWER-A fillet weld is a weld of
approximately triangular cross section that two surfaces at
approximately right angles.
What it a box weld and another term for it? - CORRECT-ANSWER-It is a
continuous fillet weld, used to weld a vertical post to a flat plate. It is
also called an all-around weld.
What type of weld is used when the strength of the joint is not crucial
or complete sealing of the joint is not necessary? - CORRECT-ANSWER-
Staggered intermittent fillet welds. In order to successfully produce
these welds, the welder must know the length of the individual welds
and the pitch. The pitch is the distance between the mid point of the
adjacent welds. In many cases the intermittent welds are not
staggered, but directly across from each other, with identical length
and pitch.
What is a plug or slot weld? - CORRECT-ANSWER-This involves joining
two relatively flat pieces with a series of small welds that are deposited
into drilled plugs or machined slots into on piece. The piece with the
