Soft solders are alloys made of mostly tin and ______.
lead
The percentages of tin and lead can vary to create different solder types.
The percentages in which the tin and lead are mixed vary to ensure that a solder with a lower ______ point than the base metal can always be found.
melting
This ensures compatibility with various base metals.
The solder most commonly used by sheet metal workers in the past was the alloy containing 50% tin and 50% lead, called ______ solder.
soft
This type of solder was widely used due to its balanced composition.
The function of the soldering flux is to remove the ______ film from the metals’ surfaces.
oxide
Removing the oxide film is crucial for effective soldering.
Muriatic acid is the commercial form of ______ acid.
hydrochloric
This acid is commonly used in various applications, including soldering.
Zinc chloride is known in the trade as cut, killed, or ______ acid.
Boiled
The commonly used flux in stainless steel soldering is _______.
Lloyd
Rosin is a natural product found in the tar of ______ trees.
Pine.
Sal-ammoniac contains ammonium chloride and can be obtained in blocks or ______ form.
PONDERED FORM
This form is often used for soldering applications.
The process of ______ soldering is much like sweat soldering, but with an increased rate of travel of the soldering copper.
SkIm
This technique involves a faster application of soldering copper.
Vertical soldering is used in the soldering of vertical or standing joints and seams as in flashing, ______, and other outside work.
GUTTERS
Gutters are a common application for vertical soldering techniques.
When soldering overhead, it is necessary to tin only one side of the ______.
COPPER
Tinning is essential for effective soldering in overhead applications.
When you receive a burn, immediately cool the burned area by immersing it in cool, still ______.
WATER
Cooling a burn with water helps to reduce pain and prevent further injury.
The fumes given off when soldering are ______.
TOXIC
Proper ventilation is necessary to avoid inhaling harmful fumes during soldering.
The most common heat source for soldering is a soldering ______.
FURNACE
A soldering furnace provides the necessary heat for effective soldering.
