WELD 322- COMBINED QUIZZES AND EXAMS | 160 QUESTIONS AND ANSWERS | WITH
COMPLETE SOLUTION.
Which definition best describes the term, Dual Impulse:
-Feature or method of connection which provides that, once the welding cycle has been initiated from
the pilot switch, it must be opened and re-closed for each additional welding cycle.
-A resistance welding process variation in which spot, projection, or upset welds are made with a single
impulse.
-A cylinder in which fluid force can be applied to the movable element in either direction.
-A mode of spot welding using preheat, cool, and weld heat. - (answer)-A mode of spot welding using
preheat, cool, and weld heat.
Which definition best describes the term, Cylinder:
-Used on press and rocker arm type welders to provide additional electrode opening to allow weld
stroke adjustment or to place parts between electrodes and then return to weld stroke.
-A device for converting fluid energy into linear motion. It usually consists of a movable element such as
a piston and piston rod, plunger, or ram operating within a cylinder bore.
-A cylinder in which fluid force can be applied to the movable element in either direction.
-A cylinder in which the fluid force can be applied to the movable element in only one direction. -
(answer)-A device for converting fluid energy into linear motion. It usually consists of a movable element
such as a piston and piston rod, plunger, or ram operating within a cylinder bore.
Which definition best describes the term, Contactor:
-Mechanical or electronic switch used to control large currents.
-A cylinder in which the fluid force can be applied to the movable element in only one direction.
-The current in the welding circuit during the making of a weld.
-The amount of effort (force) applied by electrodes to material being welded. - (answer)-Mechanical or
electronic switch used to control large currents.
Which definition best describes the term, Horn:
-A device for mechanically holding the electrode and conducting current.
-Essentially cylindrical arm or extension of an arm of a resistance welding machine that transmits the
electrode force and conducts the welding current. Typically used to hold electrode or electrode holder.
,WELD 322- COMBINED QUIZZES AND EXAMS | 160 QUESTIONS AND ANSWERS | WITH
COMPLETE SOLUTION.
-The lower arm, or supporting structure, in a resistance welding machine.
-Mechanical or electronic switch used to control large currents. - (answer)-Essentially cylindrical arm or
extension of an arm of a resistance welding machine that transmits the electrode force and conducts
the welding current. Typically used to hold electrode or electrode holder.
Which definition best describes the term, Followup:
-The area of the base metal melted as determined on the cross section of a weld.
-That part of a weld, including all or part of the nugget, that tears out in the destructive testing of spot,
seam, or projection welded specimen.
-The mating surface of a member that is in contact with or in close proximity to another member to
which it is to be joined.
-The ability of an electrode to move at the same rate that the welding material becomes plastic. -
(answer)-The ability of an electrode to move at the same rate that the welding material becomes plastic.
Which definition best describes the term, Welding Current:
-The time interval during which welding current continuously increases from the beginning of welding
current flow.
-Feature or method of connection which provides that, once the welding cycle has been initiated from
the pilot switch, it must be opened and re-closed for each additional welding cycle.
-An impulse, or series of impulses, that occur prior to and are separated from the welding current.
-The current in the welding circuit during the making of a weld. - (answer)-The current in the welding
circuit during the making of a weld.
Which definition best describes the term, Fusion Zone:
-The mating surface of a member that is in contact with or in close proximity to another member to
which it is to be joined.
-The area of the base metal melted as determined on the cross section of a weld.
-That part of a weld, including all or part of the nugget, that tears out in the destructive testing of spot,
seam, or projection welded specimen.
-The diameter of a spot or projection weld, or width of a seam weld measured in the plane of faying
surfaces. - (answer)-The area of the base metal melted as determined on the cross section of a weld.
,WELD 322- COMBINED QUIZZES AND EXAMS | 160 QUESTIONS AND ANSWERS | WITH
COMPLETE SOLUTION.
Which definition best describes the term, Air Lubricator:
-A cylinder in which fluid force can be applied to the movable element in either direction.
-Source of lubricating or air cylinder lubrication.
-A device for converting fluid energy into linear motion. It usually consists of a movable element such as
a piston and piston rod, plunger, or ram operating within a cylinder bore.
-The diameter of a spot or projection weld, or width of a seam weld measured in the plane of faying
surfaces. - (answer)-Source of lubricating or air cylinder lubrication.
Question #9:
Calculate current density (A/in.2 or kA/in.2) for the below application.
30 cycles squeeze, 10 cycles weld, 30 cycles hold
8,250-amps weld current
1,350-lb. electrode force
7/16-in. diameter, Class 2, Type "E" electrodes
1.275-ohms resistance in machine secondary - (answer)55,000
Question #10:
Consider the ideal current density for Question #9 is 168,024 A/in.2.
Calculate percent difference.
33% more than ideal
67% less than ideal
67% more than ideal
33% less than ideal - (answer)67% less than ideal
Interpret the calculated percent difference in Question #10: What is the likely result on the weld?
-Stick weld/no weld
-Significant indentation
, WELD 322- COMBINED QUIZZES AND EXAMS | 160 QUESTIONS AND ANSWERS | WITH
COMPLETE SOLUTION.
-Significant expulsion
-Good weld - (answer)-Stick weld/no weld
Resistance welding electrodes are typically manufactured from _______________ based alloys due to
superior conductive properties.
-Mild steel
-Stainless steel
-Aluminum
-Copper - (answer)-Copper
To resistance spot weld low-carbon steel 0.063 in. (1.6 mm) thickness, weld current will be in the
magnitude of ...
150 amps
400-600 amps
200 amps
10,000 amps - (answer)10,000 amps
_______________ localizes the welds at predetermined points by using projections, embossments or
intersections, all of which focus heat generation at the point of contact.
-Upset welding
-Projection welding
-Flash welding
-Seam welding - (answer)-Projection welding
_______________ is necessary to allow the weld nugget to solidify before releasing the welded parts.
-Squeeze time
-Off time
-Hold time
COMPLETE SOLUTION.
Which definition best describes the term, Dual Impulse:
-Feature or method of connection which provides that, once the welding cycle has been initiated from
the pilot switch, it must be opened and re-closed for each additional welding cycle.
-A resistance welding process variation in which spot, projection, or upset welds are made with a single
impulse.
-A cylinder in which fluid force can be applied to the movable element in either direction.
-A mode of spot welding using preheat, cool, and weld heat. - (answer)-A mode of spot welding using
preheat, cool, and weld heat.
Which definition best describes the term, Cylinder:
-Used on press and rocker arm type welders to provide additional electrode opening to allow weld
stroke adjustment or to place parts between electrodes and then return to weld stroke.
-A device for converting fluid energy into linear motion. It usually consists of a movable element such as
a piston and piston rod, plunger, or ram operating within a cylinder bore.
-A cylinder in which fluid force can be applied to the movable element in either direction.
-A cylinder in which the fluid force can be applied to the movable element in only one direction. -
(answer)-A device for converting fluid energy into linear motion. It usually consists of a movable element
such as a piston and piston rod, plunger, or ram operating within a cylinder bore.
Which definition best describes the term, Contactor:
-Mechanical or electronic switch used to control large currents.
-A cylinder in which the fluid force can be applied to the movable element in only one direction.
-The current in the welding circuit during the making of a weld.
-The amount of effort (force) applied by electrodes to material being welded. - (answer)-Mechanical or
electronic switch used to control large currents.
Which definition best describes the term, Horn:
-A device for mechanically holding the electrode and conducting current.
-Essentially cylindrical arm or extension of an arm of a resistance welding machine that transmits the
electrode force and conducts the welding current. Typically used to hold electrode or electrode holder.
,WELD 322- COMBINED QUIZZES AND EXAMS | 160 QUESTIONS AND ANSWERS | WITH
COMPLETE SOLUTION.
-The lower arm, or supporting structure, in a resistance welding machine.
-Mechanical or electronic switch used to control large currents. - (answer)-Essentially cylindrical arm or
extension of an arm of a resistance welding machine that transmits the electrode force and conducts
the welding current. Typically used to hold electrode or electrode holder.
Which definition best describes the term, Followup:
-The area of the base metal melted as determined on the cross section of a weld.
-That part of a weld, including all or part of the nugget, that tears out in the destructive testing of spot,
seam, or projection welded specimen.
-The mating surface of a member that is in contact with or in close proximity to another member to
which it is to be joined.
-The ability of an electrode to move at the same rate that the welding material becomes plastic. -
(answer)-The ability of an electrode to move at the same rate that the welding material becomes plastic.
Which definition best describes the term, Welding Current:
-The time interval during which welding current continuously increases from the beginning of welding
current flow.
-Feature or method of connection which provides that, once the welding cycle has been initiated from
the pilot switch, it must be opened and re-closed for each additional welding cycle.
-An impulse, or series of impulses, that occur prior to and are separated from the welding current.
-The current in the welding circuit during the making of a weld. - (answer)-The current in the welding
circuit during the making of a weld.
Which definition best describes the term, Fusion Zone:
-The mating surface of a member that is in contact with or in close proximity to another member to
which it is to be joined.
-The area of the base metal melted as determined on the cross section of a weld.
-That part of a weld, including all or part of the nugget, that tears out in the destructive testing of spot,
seam, or projection welded specimen.
-The diameter of a spot or projection weld, or width of a seam weld measured in the plane of faying
surfaces. - (answer)-The area of the base metal melted as determined on the cross section of a weld.
,WELD 322- COMBINED QUIZZES AND EXAMS | 160 QUESTIONS AND ANSWERS | WITH
COMPLETE SOLUTION.
Which definition best describes the term, Air Lubricator:
-A cylinder in which fluid force can be applied to the movable element in either direction.
-Source of lubricating or air cylinder lubrication.
-A device for converting fluid energy into linear motion. It usually consists of a movable element such as
a piston and piston rod, plunger, or ram operating within a cylinder bore.
-The diameter of a spot or projection weld, or width of a seam weld measured in the plane of faying
surfaces. - (answer)-Source of lubricating or air cylinder lubrication.
Question #9:
Calculate current density (A/in.2 or kA/in.2) for the below application.
30 cycles squeeze, 10 cycles weld, 30 cycles hold
8,250-amps weld current
1,350-lb. electrode force
7/16-in. diameter, Class 2, Type "E" electrodes
1.275-ohms resistance in machine secondary - (answer)55,000
Question #10:
Consider the ideal current density for Question #9 is 168,024 A/in.2.
Calculate percent difference.
33% more than ideal
67% less than ideal
67% more than ideal
33% less than ideal - (answer)67% less than ideal
Interpret the calculated percent difference in Question #10: What is the likely result on the weld?
-Stick weld/no weld
-Significant indentation
, WELD 322- COMBINED QUIZZES AND EXAMS | 160 QUESTIONS AND ANSWERS | WITH
COMPLETE SOLUTION.
-Significant expulsion
-Good weld - (answer)-Stick weld/no weld
Resistance welding electrodes are typically manufactured from _______________ based alloys due to
superior conductive properties.
-Mild steel
-Stainless steel
-Aluminum
-Copper - (answer)-Copper
To resistance spot weld low-carbon steel 0.063 in. (1.6 mm) thickness, weld current will be in the
magnitude of ...
150 amps
400-600 amps
200 amps
10,000 amps - (answer)10,000 amps
_______________ localizes the welds at predetermined points by using projections, embossments or
intersections, all of which focus heat generation at the point of contact.
-Upset welding
-Projection welding
-Flash welding
-Seam welding - (answer)-Projection welding
_______________ is necessary to allow the weld nugget to solidify before releasing the welded parts.
-Squeeze time
-Off time
-Hold time
