Welding Final 2010
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Welding is the process of joining materials – usually metals or thermoplastics – by causing fusion, a method of metal-joining technique that involves melting the base metal. Do you consider yourself a master of the practice? Prove it with this quiz!
- 1.Potential hazards relating to arc welding are
- A.
Radiation
- B.
Fumes
- C.
Toxic gases
- D.
All of the above
- 2.When using a fire extinguisher to extinguish a fire, it should be
- A.
Pointed at the base of the fire
- B.
Moved up and down to cool the flames
- C.
Pointed at the top of the fire
- D.
Held within six (6) inches of the flames
- 3.What type of fire extinguisher should be used on electrical fires?
- A.
Type A
- B.
Type B
- C.
TypeC
- D.
Type D
- 4.What are the initials of the federal organization created to insure safe and sanitary working conditions for employees?
- A.
FAA
- B.
IRS
- C.
FDA
- D.
OSHA
- 5.The maximum safe working pressure for Acetylene is
- A.
10 psi.
- B.
15 psi.
- C.
20 psi.
- D.
32 psi.
- 6.Vaporized metals, such as zinc, cadmium, lead, chromium and beryllium
- A.
Are hazardous
- B.
Can be ignored
- C.
Are highly flammable
- D.
May cause slag inclusions
- 7.Fuel gas hoses are usually colored
- A.
Green
- B.
Red
- C.
Blue
- D.
Yellow
- 8.Flash burn is
- A.
Another name for a severe sunburn
- B.
A burn caused by the welding arc coming in contact with bare skin
- C.
A bum to the eye caused by exposure to ultraviolet light from the welding arc
- D.
Damage to equipment and clothing due to the extreme heat of the welding arc
- 9.One should never enter a welding shop without wearing
- A.
Gloves
- B.
Safety glasses
- C.
A welding helmet
- D.
Welding leathers
- 10.What should one never use on gas cylinders, regulators, connections and hoses?
- A.
Wrenches
- B.
Teflon tape
- C.
Leak detectors
- D.
Oil
- 11.One should never cut or weld directly against
- A.
Cast iron
- B.
Concrete
- C.
A workbench
- D.
A non-flammable surface
- 12.One should never operate arc welding equipment while
- A.
Standing on wet or damp floors
- B.
In poorly lighted areas
- C.
Someone is standing near by
- D.
In a confined area with proper ventilation
- 13.A burn that causes the skin to blister is referred to as a
- A.
First degree burn
- B.
Second degree burn
- C.
Third degree burn
- D.
Fourth degree burn
- 14.The selection of a correct lens shade number depends on the
- A.
Brightness of the sun in the area
- B.
Type of shielding gas being used
- C.
Amount of welding current being used
- D.
Filler metal being used
- 15.Federal regulation requires that hazardous information about a product be provided to all users of that product. The form used to provide this information is called a(n)
- A.
Information Form (IF)
- B.
Hazardous Information Sheet (HIS)
- C.
Occupational Safety and Hazard Form (OSHF)
- D.
Material Safety Data Sheet (MSDS)
- 16.Which of the following is the only acceptable method for lighting oxyfuel torches?
- A.
Matches
- B.
Cigarette lighter
- C.
Welding arc
- D.
Striker
- 17.Areas that have less than__________ cubic feet per welder, or that have ceilings less than 16 feet high, require forced ventilation.
- A.
8,000
- B.
4,000
- C.
10,000
- D.
12,000
- 18.A confined space is one that
- A.
Has a flammable atmosphere
- B.
Has unrestricted means of entry or exit for employees
- C.
Is designed for continuous employee occupancy
- D.
Is large enough that a person can enter and perform tasks
- 19.A Hot Work Permit
- A.
Authorizes the performance of work potentially posing a fire hazard
- B.
Promotes the development of standard fire safety guidelines
- C.
Records unsafe conditions at a job site
- D.
Helps the manager keep records of hazardous spaces
- 20.While welding, ventilation should be placed as close to the fume source as practical.
- A.
True
- B.
False
- 21.Because of the low amount of ultraviolet light present, it is not necessary to use shaded lenses when oxy-fuel cutting.
- A.
True
- B.
False
- 22.Long hair, loose-fitting clothes, and ties are personal safety hazards around rotating equipment.
- A.
True
- B.
False
- 23.A butane or propane cigarette lighter is safe around welding equipment as long as it is kept in one's pocket.
- A.
True
- B.
False
- 24.A fully charged oxygen cylinder contains approximately 225 psi at 70° F.
- A.
True
- B.
False
- 25.Safety glasses are not required when welding with the helmet down.
- A.
True
- B.
False
- 26.Skin contact with liquid oxygen can cause frostbite.
- A.
True
- B.
False
- 27.Gas cylinders must be chained or secured at all times.
- A.
True
- B.
False
- 28.Oxygen cylinders should never be stored with flammable gases such as acetylene cylinders.
- A.
True
- B.
False
- 29.In order to maintain production, it is acceptable to operate welding equipment beyond its rated capacity.
- A.
True
- B.
False
- 30.When not in use, an electrode holder, GTAW torch or MIG gun should not be placed in contact with a grounded metal surface.
- A.
True
- B.
False
- 31.Acetylene cylinders should never be operated while lying on their side because acetone could be drawn into the valve, regulator and hoses.
- A.
True
- B.
False
- 32.One should never touch an electrode to a metal surface other than the workpiece because those surfaces may become electrically live.
- A.
True
- B.
False
- 33.ANSI Z49.1 allows oxygen to be used as a substitute for compressed air when necessary.
- A.
True
- B.
False
- 34.Burns are some of the most common and painful injuries in a welding shop.
- A.
True
- B.
False
- 35.Fuel gas fittings are equipped with left hand threads.
- A.
True
- B.
False
- 36.Of the following, which is not a requirement for the SMAW process?
- A.
Electricity
- B.
Gas supply
- C.
Base metal
- D.
Filler metal
- 37.
- A.
Once opened, it should be kept in an electrode oven.
- B.
The weld deposit has a minimum tensile strength of 70,000 psi.
- C.
It is suitable for use in the flat and horizontal fillet positions only.
- D.
It is suitable for use in all positions.
- E.
It is a low hydrogen electrode.
- 38.The distance from the molten tip of the SMAW electrode to the surface of the molten weld pool should be
- A.
One electrode diameter
- B.
Open circuit voltage
- C.
Ignition length
- D.
Arc current
- 39.In the SMAW process, as arc length increases, current (amperage)
- A.
Increases
- B.
Decreases
- C.
Remains relatively constant
- D.
First increases then decreases
- E.
First decreases then increases
- 40.Which one of the following electrodes is not suitable for use in all positions?
- A.
E6010
- B.
E6011
- C.
E7018
- D.
E7024
- E.
E7048
- 41.Which of the following electrodes would you select to produce a weld with shallow penetration?
- A.
E6010
- B.
E6011
- C.
E6013
- D.
E7018
- 42.An engine-driven generator without a rectifier produces what form of welding current?
- A.
AC only
- B.
DC only
- C.
Both AC and DC
- D.
AC and DCEP
- 43.Which of the following group of electrodes is low hydrogen type?
- A.
7024, 7027, and 7028
- B.
6010 and 6011
- C.
6012, 6013, and 7014
- D.
7015, 7016 and 7018
- 44."Arc blow" is caused by
- A.
Strong winds
- B.
Magnetic forces
- C.
Too high an amperage for the size of the electrode
- D.
Too low an amperage for the size of the electrode
- 45."Duty cycle" is a term used to indicate the
- A.
Amount of time a machine is used each day at maximum output
- B.
Percentage of time a machine can operate at maximum in a 10-minute period
- C.
Type of work duty the machine was designed to do by the manufacturer
- D.
Length of time required to cycle
- 46.When DCEP is used, direction of current flows
- A.
From the work to the electrode
- B.
From the electrode to the work
- C.
Both to and from the electrode
- D.
Depending on the electrode being used
- 47.Which of the following welding cable sizes is the largest?
- A.
#1/0
- B.
#2
- C.
#1
- D.
#2/0
- 48.Rectifiers are noted for their ability to
- A.
Control welding power
- B.
Reduce spatter
- C.
Change AC to DC current
- D.
Eliminate arc blow
- 49.When referring to standard Alternating Current in North America, the current changes direction
- A.
Once per second
- B.
60 times per second
- C.
120 times per second
- D.
Every 1/240th of a second
- 50.In order to reduce waste and control cost, you should weld until the electrode is
- A.
One half inch from the core wire
- B.
Down to the core wire
- C.
Four (4) inches form the core wire
- D.
Down to the classification numbers
- 51.In GMAW, the shielding for the molten metal is accomplished through the use of
- A.
Granular flux
- B.
Inert and reactive gases
- C.
Reactive gases only
- D.
Inert gases only
- 52.GMAW is the abbreviation for?
- A.
Gas Machine Arc Welding
- B.
Gas Method Arc Welding
- C.
Gas Material Arc Welding
- D.
Gas Metal Arc Welding
- 53.In GMAW, insufficient gas flow can cause?
- A.
Undercut
- B.
Overlap
- C.
Porosity
- D.
Hydrogen cracking
- 54.A worn contact tube results in
- A.
Poor arc starts
- B.
Ropey welds
- C.
Excessive spatter
- D.
Porosity
- 55.The benefit of copper coated electrode wires is
- A.
Better arc starts
- B.
Increased contact tip life
- C.
Improved wire feeding
- D.
All of the above
- 56.What type of power source is used for GMAW?
- A.
Constant Current
- B.
Alternating Current
- C.
Variable Voltage
- D.
Constant Voltage
- 57.What type of electrode wire is used with GMAW?
- A.
Flux cored
- B.
Solid
- C.
Tubular
- D.
None of the above
- 58.In GMAW, the amperage is controlled by adjusting the
- A.
Voltage
- B.
Wire feed speed
- C.
Wattage
- D.
Arc length
- 59.In GMAW, electrode extension is defined as the distance from the
- A.
Nozzle the molten weld pool
- B.
End of the contact tube to the molten weld pool
- C.
Tip of the wire to the molten weld pool
- D.
End of the contact tube to the tip of the wire
- 60.Which AWS electrode classification is correct for GMAW wire?
- A.
ER70S-3
- B.
E70S-6
- C.
E70-S3
- D.
E71T-1
- 61.Which of the following is considered an advantage of the GMAW process?
- A.
Higher deposition rates than manual processes
- B.
Easy to use compared to manual processes
- C.
Less electrode waste than with SMAW
- D.
All of the above
- 62.Electric current is transferred to the electrode through the
- A.
Gun cable liner
- B.
Contact tube
- C.
Wire feed rolls
- D.
Gas diffuser
- 63.The contact tube should be
- A.
Sized to match the wire diameter
- B.
Slightly smaller than the wire diameter
- C.
1-1/2 times larger than the wire diameter
- D.
2 times larger than the wire diameter
- 64.What does the 70 indicate in the electrode classification ER70S-3?
- A.
Trade name
- B.
Tensile Strength
- C.
Yield Strength
- D.
Hardness
- 65.Excessive amounts of weld spatter in the nozzle may cause
- A.
Lack of fusion
- B.
Undercutting
- C.
Poor shielding
- D.
Longitudinal cracks
- 66.Which of the following is not an advantage of the GMAW process?
- A.
Higher deposition rates
- B.
Relatively easy process for a beginner to learn
- C.
Can be used to weld ferrous and nonferrous metals
- D.
Good for use in windy areas
- 67.Which shielding gas or gas mixture is most often used for welding carbon steel with the short-circuiting transfer mode?
- A.
100% Argon
- B.
10% Carbon dioxide, 90% Helium
- C.
98% Argon, 2% Oxygen
- D.
75% Argon, 25% Carbon Dioxide
- 68.The chemical symbol for tungsten is
- A.
T
- B.
Tu
- C.
W
- D.
L
- E.
Tg
- 69.
- A.
Stop at the same time the arc is broken
- B.
Long enough to allow the electrode to cool
- C.
At least one minute after the arc is broken
- D.
Long enough to allow the base metal to cool
- E.
Long enough to allow the base metal and electrode to cool
- 70.When using GTAW to weld Aluminum with Alternating Current (AC), the tip of the tungsten electrode should be
- A.
Tapered
- B.
Tapered with the end slightly blunted
- C.
Rounded at the tip
- D.
Ground at right angles to the grain of the electrode
- 71.Alternating Current (AC) is used for welding aluminum because
- A.
It produces deeper penetration than Direct Current
- B.
Of the cleaning action and medium penetration of the arc
- C.
AC power is more cost effective than DC power
- D.
Aluminum conducts AC better than DC
- E.
DCEP produces too much penetration on aluminum
- 72.Which of the following methods is used to start the GTAW arc without touching the base metal?
- A.
Touch start
- B.
High frequency start
- C.
Pulse start
- D.
Lift start
- E.
Scratch start
- 73.High Frequency current is added to Alternating Current to
- A.
Maintain the arc
- B.
Prevent distortion
- C.
Provide cleaning action
- D.
Refine the grain structure of the weld
- 74.The shielding gas most commonly used for welding low carbon steel with GTAW is
- A.
Carbon Dioxide
- B.
Argon
- C.
Helium
- D.
A mix of Argon and Helium
- 75.To remove the oxide layer from aluminum prior to welding you should
- A.
Brush the weld joint with a steel brush
- B.
Brush the weld joint with a stainless steel brush
- C.
Wipe the weld joint with a dry, clean rag
- D.
Aluminum oxides normally do not require removal
- 76.Tungsten is used for GTAW electrodes because it has which of the following properties?
- A.
High melting point
- B.
Low electrical resistance
- C.
Good heat conductivity
- D.
High electron emission
- E.
All of the above
- 77.The voltage present when the welding machine power switch is in the ON position, but no welding is taking place is called
- A.
Open-circuit voltage
- B.
Operating voltage
- C.
Arc voltage
- D.
High frequency voltage
- 78.Filler metal with an AWS classification of ER4043 is used to weld
- A.
Carbon Steel
- B.
Stainless Steel
- C.
Aluminum
- D.
Copper
- 79.Filler metal with an AWS classification of ER70S-X is used to weld
- A.
Carbon Steel
- B.
Stainless Steel
- C.
Aluminum
- D.
Copper
- 80.What is the term for the width of the cut produced by any cutting process?
- A.
Drag line
- B.
Kerf
- C.
Wraparound
- D.
Slag
- 81.The maximum recommended safe working pressure for Acetylene is
- A.
10 pounds per square inch
- B.
15 pounds per square inch
- C.
20 pounds per square inch
- D.
32 pounds per square inch
- 82.Which oxyacetylene flame has an excess of fuel?
- A.
Oxidizing
- B.
Neutral
- C.
Carburizing
- D.
None of the above
- 83.The oxyfuel process uses oxygen and what other types of gases?
- A.
Inert Gases
- B.
Reactive Gases
- C.
Mixed gases
- D.
Flammable gases
- 84.What type of thread and color are fuel gases fittings?
- A.
Right hand - Red
- B.
Left hand-Red
- C.
Right hand - Green
- D.
Left hand - Green
- 85.
- A.
Greater than the acetylene working pressure
- B.
Equal to the acetylene working pressure
- C.
Less that the acetylene working pressure
- D.
A constant 20 pounds per square inch
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