Welding final review
T/F PPE safety glasses/goggles must have Z87 or Z87+ marked on the frame
True
T/F Any welding lens shade is permissible for all types of welding applications
False
T/F Infrared radiation (IR) cannot be felt
False
T/F Arc blow occurs when a magnetic field is developed while welding and causes the arc to move in an unpredictable manner
True
T/F The primary purpose of a shielding gas being present during the welding process is to protect the molten puddle form atmospheric contamination
True
T/F Changing the length of the arc while welding does not change the heat of the arc
False
T/F With SMAW, the primary reason starting the arc is more difficult than maintaining the arc is because the gas at the arc strike is not fully ionized
True
T/F Using a weave pattern while placing a bead will increase the amount of heat in the weldment
True
Which polarity listed does not cause (magnetic) arc blow?
AC
With SMAW and a given amperage, which polarity will provide the deepest penetration of the bead?
DCEP
Which of the following welding processes does a welder have some choice in the polarity selected for a given electrode?
GTAW or SMAW
Which of the following statements is not a consideration when choosing DCEP or DCEN for a SMAW electrode?
Base metal shapes (plate, pipe, etc.)
T/F An edge joint is formed with two overlapping materials. The edges create fillet weld
False
T/F Reinforcement refers to the depth of the penetration
False
T/F Restricted position means that the welder's positioning when welding pipe is restricted. Areas to be welded are difficult to reach
True
T/F When a weld symbol is both above and under the reference line, it means that welds are to be completed on both sides of the joint
True
T/F An outside corner joint creates the geometry for a groove weld
False
T/F Pipe welding is comprised mostly of fillet welds
False
T/F A square groove weld requires some type of mechanical joint preparation prior to fit-up
False
T/F A lap joint creates the geometry for fillet welds
True
T/F A 3F weld is a fillet weld completed on the horizontal position
False
The edges of a weld are the?
Toes
For welding certification, a flat welding position groove weld is
1G
If a weld symbol is_______ the reference line, then the weld is to be completed on the side that the arrow is pointing to
Below
Which of the following identifies pipe positioned at a 45-degree angle?
6G
Cutting tips are made out of which alloy?
Copper or chrome plated
What could happen if acetylene was used with the wrong tip?
The tip could overheat and cause backfire
What is the most widely used fuel gas used for cutting?
Acetylene
The oxygen cylinder valve should be opened____
Slowly until the pressure registers on the cylinder guage, them all the way up to prevent leaks in the top of the valve
The center hole on a cutting tip determines
The thickness of material to be cut
T/F The SMAW process only uses AC polarity
False
T/F Alternating current (AC) is the preferred type of current for welding for SMAW
False
T/F A welder inverter is less complex than the other traditional welding power sources
False
T/F The stops and re-starts necessary with SMAW electrodes increases the risk of weld defects
True
T/F Direct current has neither a positive or negative value 120 times per second
False
T/F SMAW has one of the highest operating factors of the arc welding processes
False
The most basic type of welder is an
Transformer
Which of the following is not part of the welding electrical circuit?
None of the above
The transformer inside a welding power source converts high voltage, low amperage electricity to_________ electricity for welding
Low voltage, high amperage
To increase penetration of a bead, you should select which welding polarity?
DCEP
Which polarity is also referred to as reverse polarity?
DCEP
Changes in the welding arc length will also change the following electrical characteristics?
Voltage
T/F Metals are joined using the arc welding process when two pieces of metal are heated to their melting point and additional metal is added to the molten puddle. This molten mass cools and solidifies into one solid piece
True
T/F DCEN polarity is used when welding in the GMAW process
False
T/F The loss of shielding gas when welding outdoors can cause weld failures as a result of porosity, lack of fusion, and other undesirable discontinuities in a weld
True
T/F GMAW exclusively uses inert shielding gas
False
A constant voltage system strives to keep which variables constant?
Arc length
T/F The delivery of gas to the arc is not important to the quality of the finished weld in the FCAW-G welding processes
False
T/F A flow meter regulator is designed to measure cylinder pressure and gas flow
True
T/F The four roll drive system of a wire drive is used primarily for industrial applications
True
T/F A FCAW wire drive component cannot be used for other types of welding wire
False
T/F A basic FCAW power source is a transformer
True
T/F The CTWD is the total of both the wire stick out and the arc length
True
T/F An air cooled welding gun will be limited to operating at lower amperages
True
The gas diffusor functions in the following manner?
All of the above
Which of the following is not true in describing the liner in the welding gun assembly?
It is a permanent part of the cable assembly
What is the technology that senses the consumables are installed properly into the torch?
Parts-in-place technology
What are the two parameters that can be manually adjusted on the PAC machine?
Amperage and air pressure
What two items should not be carried in your pocket when cutting?
Plastic lighter and matches
T/F Self-shielded electrodes are best suited for indoor applications
False
T/F The FCAW self-shielded electrode can be thought of as a STICK welding electrode turned inside out
True
T/F The FCAW process uses a continuous consumable electrode
True
T/F FCAW processes have a much higher deposition rate than SMAW
True
T/F The E70T-X electrode can be used in all-position welding
False
T/F Multi-pass welds can be made with FCAW-G electrodes
True
T/F As a process, FCAW-S is considered to be more portable than the FCAW-G process
True
The primary function of the flux inside a FCAW-S electrode is to
Protect the weld
The main operating difference between FCAW-S and FCAW-G is
Polarity
An E81T-X FCAW electrode will have a minimum of_____ psi tensile strength
80,000
Calcium is part of the flux with FCAW electrodes for which of the following reasons
Produce the slag