Welding Methods Flashcards
When "plastic state" and "pressure" are terms used to describe a type of weld, it is a) forge welding b) oxy-acetylene welding c) resistance welding d) submerged arc welding e) electric arc welding
a) forge welding
The oldest form of welding is
a) resistance welding
b) spot welding
c) electric arc welding
d) plasma arc welding
e) forge welding
e) forge welding
When a filler rod and very hot flame are used in a welding process, the weld method is a) submerged arc welding b) heli-arc method c) electric arc method d) oxy-acetylene method e) spot-weld method
d) oxy-acetylene method
Non-alloy low carbon steel filler rods are most often used in a) submerged arc welding b) heli-arc welding c) oxy-acetylene welding d) electric arc welding e) forge welding
c) oxy-acetylene welding
Cast iron and malleable iron are commonly repaired using
a) oxy-acetylene welding
b) submerged arc welding
c) electric arc welding
d) soldering
e) brazing
e) brazing
A “tinning temperature” is used in
a) soldering
b) brazing
c) forging
d) electric arc welding
e) metal cutting
b) brazing
When braze welding, the filler rod is usually
a) alloy steel
b) brass
c) antimony
d) aluminum
e) bronze
e) bronze
When acetylene is stored in a cylinder it is absorbed in
a) water
b) acetone
c) chromate
d) phosphate
e) acetate
a) water
Acetylene should not be used at pressures above
a) 103 kPa
b) 120 kPa
c) 50 kPa
d) 25 kPa
e) 10 kPa
a) 103 kPa
Soft soldering is a form of braze welding where soldering temperatures are in the range of a) 150 - 260 degrees Celsius b) 500 - 1,000 degrees Celsius c) 1,000 - 1,200 degrees Celsius d) 1,200 - 1,500 degrees Celsius e) 700 - 900 degrees Celsius
a) 150 - 260 degrees Celsius
Solder connections are usually used on
a) steel lines
b) stainless steel lines
c) copper lines
d) aluminum lines
e) cast iron lines
c) copper lines
Acetylene hose connections have
a) right hand threads
b) no threads
c) slip-on connections
d) left hand threads
e) quick couplers
d) left hand threads
Which of the following is the colour for an acetylene hose?
a) red
b) green
c) black
d) white
e) yellow
a) red
The following grades of Pressure Welders Certificate of
Competency are established under the Boilers Act:
a) “A” and “B”
b) “A”, “B”, and “C”
c) “A”
d) “B”
e) “AC” and “DC”
b) “A”, “B”, and “C”
When brought into an oxygen rich atmosphere, steel will burn at a) 358 degrees C b) 507 degrees C c) 670 degrees C d) 870 degrees C e) 1,213 degrees C
d) 870 degrees C
When flame cutting, metal temperature must be brought above
a) 1,000 degrees Celsius
b) 900 degrees Celsius
c) 980 degrees Celsius
d) 1,100 degrees Celsius
e) 870 degrees Celsius
e) 870 degrees Celsius
When flame cutting, a blast of pure oxygen is directed into the heated metal to a) blow molten metal out b) burn away a portion of the metal c) cool the metal d) produce slag
b) burn away a portion of the metal
A standard flame cutting torch has \_\_\_\_\_\_\_\_\_\_ holes in the tip. a) four b) three c) five d) seven e) six
d) seven
A rectifier used in arc welding a) will produce temperatures in the range of 700 to 830 degrees b) will change AC to DC c) is used for weld inspection d) will rectify slag inclusion problems e) produces an arc in the temperature range of 8,300 to 13,000 degrees C
b) will change AC to DC
Electric arc temperatures may be as high as
a) 3,000 degrees C
b) 4,250 degrees C
c) 5,325 degrees C
d) 7,450 degrees C
e) 8,300 degrees C
e) 8,300 degrees C
The current supply for electric arc welding may be a/an:
- alternating current
- direct current and straight polarity
- direct current and reverse polarity
- direct current generators
a) 1, 3
b) 2, 3, 4
c) 1, 2, 4
d) 1, 3, 4
e) 1, 2, 3, 4
e) 1, 2, 3, 4
If a welding electrode has the following identifying number "E7015", what does the "70" represent? a) 70 kPa b) 70,000 kPa c) 70 psi d) 70,000 psi e) 700 psi
d) 70,000 psi
If a welding electrode has the following identifying number
“E6016”, what does the “1” represent?
a) the welding position
b) AC or DC with medium penetration
c) DC reverse polarity with medium penetration
d) AC with deep penetration
e) DC with deep penetration
a) the welding position
The electrical power necessary for arc welding may be supplied by:
- generators
- transformers
- rectifiers
- pumps
a) 1, 2, 3, 4
b) 1, 3, 4
c) 1, 2
d) 1, 2, 4
e) 1, 2, 3
e) 1, 2, 3
With reverse polarity
a) the welding electrode is connected to the negative terminal
b) AC power is supplied to the electrode
c) the welding electrode is connected to the positive terminal
d) AC or DC power may be supplied to the electrode
e) DC power is supplied to the electrode
c) the welding electrode is connected to the positive terminal
With straight polarity
a) AC or DC power may be supplied to the electrode
b) DC power is supplied to the electrode
c) the welding electrode is connected to the negative
terminal
d) AC power is supplied to the electrode
e) the welding electrode is connected to the positive
terminal
c) the welding electrode is connected to the negative
terminal
A welding electrode stamped "E6010" would have a tensile strength of a) 6,000 psi b) 6,010 psi c) 6,100 psi d) 60,000 psi e) 60,100 psi
d) 60,000 psi
The item which keeps the weld from oxidizing, cooling too fast, and the bead smooth during submerged arc welding is the a) arc temperature b) flux c) steadiness of the welder's hand d) rod composition e) rod rate of feed
b) flux
Advantages of submerged arc welding include:
1. a protective coating is not required over the electrode
2. the arc is not visible
3. weld seams are neat and uniform in appearance
4. a skilled welder is not required to operate the
machinery
5. very little gas or fumes rise from the weld
a) 2, 3, 5
b) 1, 4, 5
c) 2, 3, 4
d) 3, 4, 5
e) 1, 3, 5
a) 2, 3, 5
Submerged arc welding is
a) an oxyacetylene welding process
b) an AC electric welding process
c) an AC or DC electric welding process
d) a DC welding process
e) a braze welding process
c) an AC or DC electric welding process
A common method used to start the arc in submerged arc
welding is with
a) a piece of steel wool
b) a long wooden match
c) an electric sparker
d) an oil soaked torch
e) a striker similar to that used in oxyacetylene
a) a piece of steel wool
