Mid Term Flashcards

(98 cards)

1
Q

The type of safety device used on an acetylene cylinder is a __.
A. spring-loaded plug
B. pressure safety disc
C. fusible plug
D. check valve

A

C. fusible plug

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2
Q

What determines the rate at which acetylene can be drawn from a cylinder?
A. The temperature of the cylinder.
B. The number of cylinders.
C. The amount of acetylene remaining.
D. All of the above.

A

B. The number of cylinders.

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3
Q

A Dewar flask is used to ship __
A. liquid acetylene
B. hydrogen gas
C. liquid oxygen
D. All of the above.

A

C. liquid oxygen

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4
Q

No part of an oxygen cylinder wall is thinner than __.
A. 1/4” (6.4 mm)
B. 3/8” (9.5 mm)
C. 3/16” (4.8 mm)
D. 7/32” (5.6 mm)

A

A. 1/4” (6.4 mm)

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5
Q

Acetone drawn from the cylinder along with the acetylene ___
A. burns with a greenish hue
B. results from acetylene being drawn from the cylinder too rapidly
C. increases the flame temperature and decreases gas consumption
D. has little to no effect on the weld

A

B. results from acetylene being drawn from the cylinder too rapidly

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6
Q

Which of the following gases is not used as a fuel gas for the oxyfuel gas welding process?
A. Hydrogen
B. LP (liquefied petroleum)
C. Natural gas
D. Helium

A

D. Helium

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7
Q

The regulator is closed when the adjusting screw is turned in (clockwise).
A. True
B. False

A

A. True

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8
Q

With a manifold system, a master regulator controls the working pressure supplied to the torch at each welding station.
A. True
B. False

A

B. False

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8
Q

A broaching wire can be used to clean a torch tip orifice.
A. True
B. False

A

A. True

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9
Q

Petroleum products, such as grease or lubricating oil, burn easily in the presence of oxygen.
A. True
B. False

A

A. True

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10
Q

A joint formed by two pieces of base metal that are at an angle of approximately 90 to each other is called a(n) __
A. edge joint
B. T-joint
C. lap joint
D. flange

A

B. T-joint

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11
Q

The _____is not information given on the welding symbol.
A. depth of penetration
B. depth of the edge preparation
C. thickness of the base metal
D. method of finishing the weld

A

C. thickness of the base metal

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12
Q

Information below the reference line refers to the ___ side of the weld.
A. right
B. left
C. arrow
D. other

A

C. arrow

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13
Q

The ___ is placed in parentheses on the weld symbol.
A. effective throat size
B. groove weld size
C. height of the weld face
D. size of the fillet

A

B. groove weld size

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14
Q

For which of the following welds are the welding symbols offset from each other?
A. A staggered intermittent weld.
B. A chain intermittent weld.
C. A weld at the end of the base metal.
D. A weld in the middle and at the end of the base metal.

A

A. A staggered intermittent weld.

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15
Q

In an intermittent weld, what is the distance between the end of one weld and the beginning of the next, if the length and pitch dimensions are 4-10?
A. 8 inches
B. 6 inches
C. 4 inches
D. 10 inches

A

B. 6 inches

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16
Q

A _ work angle is commonly used for welding a fillet weld.
A. 0°
B. 20°
C. 30°
D. 45°

A

D. 45°

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17
Q

What does the following weld symbol represent?
A. Square groove
B. Back or backing
C. Melt-through
D. Concave

A

D. Concave

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18
Q

What does the following weld symbol represent?
A. U-groove
B. Surfacing
C. Melt-through
D. Fillet

A

C. Melt-through

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19
Q

What does the following weld symbol represent?
A. Flare-bevel groove
B. Weld all around
C. Seam
D. Stud

A

B. Weld all around

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20
Q

What does the following weld symbol represent?
A. Spot or projection
B. Edge
C. Field weld
D. Convex

A

A. Spot or projection

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21
Q

The correct AWS term to describe the fuel gas and oxygen cutting process is -
A. oxyfuel gas cutting
B. flame cutting
C. burning
D. flame burning

A

A. oxyfuel gas cutting

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22
Q

When oxygen working pressure is being set on a regulator, the oxygen cutting lever must be depressed because _.
A. acetylene flow is affected
B. cutting oxygen pressure is higher than the preheating flame pressure
C. preheat acetylene pressure is higher than the cutting oxygen pressure
D. cutting oxygen flow will lower the oxygen preheat pressure set on the regulator

A

D. cutting oxygen flow will lower the oxygen preheat pressure set on the regulator

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23
Q

A higher oxygen pressure is necessary for cutting than for welding the same thickness of metal in order to ___.
A. heat the base metal to its kindling point
B. blow the acetylene into the kerf
C. provide enough oxygen to support combustion in the kerf
D. burn the metal and blow it out of the kerf

A

D. burn the metal and blow it out of the kerf

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24
The minimum number of orifices in a cutting tip is A. one B. two C. three D. seven
A. one
25
The cutting oxygen valve is opened __ A. as the tip is brought near to the base metal B. when the base metal begins to melt or reaches its ignition point C. when the metal turns a near-white color D. when tip angle and distance are correct
B. when the base metal begins to melt or reaches its ignition point
26
While cutting thin metal with a tip that is too large, a welder should hold the cutting torch at an angle of ____ to the base metal. A. 70°-90° B. 0°-10° C. 15°-20° D. 30°-45°
A. 70°-90°
27
Acetylene should never be used at a working pressure above A. 10 psig (70 kPa) B. 15 psig (103 kPa) C. 20 psig (140 kPa) D. 25 psig (175 kPa)
B. 15 psig (103 kPa)
28
In preparation for oxyfuel gas cutting, a welder should __ A. clear the area of combustibles B. provide adequate ventilation C. post a fire watch D. All of the above.
D. All of the above.
29
What makes it possible for the oxyacetylene gouging tip to gouge, but not cut through, the metal? A. A lower oxygen cutting pressure. B. A smaller cutting oxygen orifice. C. A higher flame temperature. D. All of the above.
A. A lower oxygen cutting pressure.
30
A bell-mouthed kerf is generally caused by -_ A. too much acetylene pressure B. too much oxygen pressure C. an oxidizing flame D .a carburizing flame
B. too much oxygen pressure
31
When welding or cutting work is to be done on a tank or cylinder that previously held a flammable material, -_. A. an experienced welder should do the work B. the container should be filled with an inert gas and vented C. a qualified safety inspector should be consulted or be present D. All of the above.
D. All of the above.
31
The last step in lighting a positive-pressure oxyacetylene cutting torch involves__ A. opening the torch acetylene valve approximately 1/16 to 1/8 turn B. turning on the acetylene until most of the smoke clears from the flame C. opening the cutting oxygen valve and adjusting the working pressure to obtain neutral preheat flames D. None of the above.
C. opening the cutting oxygen valve and adjusting the working pressure to obtain neutral preheat flames
32
Which of the following output currents is used for PAC? A. AC B. DCEN C. DCEP D. High-frequency AC
B. DCEN
33
Which of the following materials is not used to make PAC torch electrodes? A. Hafnium B. Zirconium C. Thorium D. Tungsten
C. Thorium
34
A constricting nozzle___ A. separates the shielding gas and erifice gas B. protects the electrode from spatter during a piercing operation C. creates, concentrates, and directs the high-velocity plasma D. prevents a nontransferred arc from contacting the base metal
C. creates, concentrates, and directs the high-velocity plasma
35
Using oxygen as the orifice gas __. A. decreases dross on the bottom surface of the cut B. increases the cutting speed when cutting stainless steel C. eliminates hot shortness when cutting aluminum D. increases the cutting speed when cutting carbon steel
D. increases the cutting speed when cutting carbon steel
36
Which of the following should be kept away from the cutting area? A. Paper or cardboard B. Rags or cloth C. Grease, oil, or fuel D. All of the above.
D. All of the above.
37
In plasma arc cutting, the parts to be cut may be placed below the surface of a water table to __- A. maintain a small heat-affected zone in the base metal B. suppress the noise during high amperage automated cutting C. create superheated steam that will remove molten metal from the kerf D. provide a less expensive shielding gas
B. suppress the noise during high amperage automated cutting
38
A transferred arc is between the electrode and the _ A. torch body B. swirl ring C. constricting nozzle D. base metal
D. base metal
39
Which of the following is not a main part of a plasma arc cutting system? A. Power supply B. Gas supply C. Foot pedal D. Torch
C. Foot pedal
40
Which of the following is not an advantage of plasma arc cutting? A. Heat affected zones are minimized. B. Cutting speeds are faster than oxyfuel cutting. C. No explosive gases are used D. Equipment is less expensive than other processes.
D. Equipment is less expensive than other processes.
41
Oxygen is recommended as an erifice gas for =-. A. mild steel B. stainless steel C. aluminum D. All of the above
A. mild steel
42
Which of the following is not recommended as an orifice gas for aluminum? A. Oxygen B. Air C. Nitrogen D. Argon/hydrogen
A. Oxygen
43
Nitrogen is a good orifice gas for cutting aluminum and___ A. stainless steel B. aluminum C. Both A and B. D. Neither A nor B.
C. Both A and B.
44
H-35 is an orifice gas composed of __. A. 65% air and 35% hydrogen B. 65% argon and 35% hydrogen C. 65% argon and 35% helium D. 65% nitrogen and 35% hydrogen
B. 65% argon and 35% hydrogen
44
The accepted name for the empty space that is formed as a result of removing metal with an oxyfuel gas cutting flame is the _____ A. groove B. kerf C. drag D. slot
B. kerf
45
A cutting tip is usually made from A. steel B. copper C. titanium D. aluminum
B. copper
46
A cutting tip is usually connected to the torch tube by -_ A. a threaded nut B. a silver-soldered joint C. accurately machined mating surfaces D. a slip joint using an O-ring seal
A. a threaded nut
47
A heavy-duty oxygen regulator is the best choice for oxyacetylene cutting because it A. has two stages B. has a larger orifice that permits a higher flow of oxygen C. can handle a pressure of 100-150 psig (700 kPa-1050 kPa) D. All of the above.
D. All of the above.
48
Thin lines that show solid, cutaway surfaces in a section view are called ___ lines. A. section B. cutting plane C. object D. hidden edge
A. section
49
A(n) ____ axonometric view shows two of the three angles and corners of equal size. A. isometric B. dimetric C. trimetric D. oblique
B. dimetric
50
The formula for determining the ____ of a circle is 2 x r. A. diameter B. radius C. perimeter D. circumference
A. diameter
51
Orthographic projection is a three-dimensional representation of a two-dimensional object. A. True B. False
B. False
52
The thickest line that may appear on a drawing is an extension line. A. True B. False
A. True
53
The drawing sheet size is shown on the title block of a drawing by a number code running from 1 to 5. A. True B. False
B. False
54
An axonometric view in which there are no equal angles or corners is called a(n) -_. view. A. isometric B. dimetric C. trimetric D. orthographic
C. trimetric
55
Thin lines that show solid, cutaway surfaces in a section view are called ____ lines. A. section B. cutting plane C. object D. hidden edge
A. section
56
How large would a 1" (25 mm) part be drawn at a 4 = 1 scale? A. 1/4" (6.4 mm) B. 2" (50 mm) C. 4" (100 mm) D. 1.4" (35 mm)
C. 4" (100 mm)
57
A(n) _ axonometric view shows two of the three angles and corners of equal size. A. isometric B. dimetric C. trimetric D. oblique
B. dimetric
58
The term____refers to the distance measured by the line bounding a circle. A. diameter B. radius C. perimeter D. circumference
D. circumference
59
The formula for determining the ____ of a circle is 2 x r. A. diameter B. radius C. perimeter D. circumference
A. diameter
60
Which of the following items is not found in the title block on an assembly drawing? A. Sheet number B. Scale of the drawing C. Detail view with callout D. Name of the part or assembly
C. Detail view with callout
61
When lifting, it is a good practice to ____. A. keep your back straight and lift with your leg muscles B. lift over 35 pounds using your arm muscles C. always bend your back while lifting D. None of the above.
A. keep your back straight and lift with your leg muscles
62
Which of the following factors does not promote safety in the shop? A. Staying healthy in mind and body. B. Becoming well trained in the required job or task. C. Having a good attitude toward safety and safety rules. D. Thinking about pleasant things to pass the time.
D. Thinking about pleasant things to pass the time.
63
-__is a recommended material for protective clothing for welding or cutting A. Nylon B. Polyester C. Leather D. Asbestos
C. Leather
64
-_ must be stored in an approved steel cabinet. A. Gas cylinders B. Cleaning chemicals C. Welding rods D. Leathers
B. Cleaning chemicals
65
It is recommended that -_ be worn while resistance welding. A. eye protection B. pants without cuffs C. a cap D. All of the above.
D. All of the above.
66
Which of the following safety practices is recommended when working around electricity? A. Let only trained technicians do repairs on electrical equipment. B. Always check for loose connections and worn insulation with the power off. Assume all electricity is dangerous. C. Voltages of 220 volts or more should be clearly marked as dangerous. D. All of the above.
D. All of the above.
67
_should be used to light an oxyfuel gas flame. A. A wooden match B. A book match C. A spark lighter D. Another torch E. An electric arc
C. A spark lighter
68
Which of the following is an appropriate type of face and eye protection for resistance welding? A. Lightly tinted welding goggles B. Welding helmet with a #6 filter plate C. Welding helmet with a #10 filter plate D. Welding helmet with a #14 filter plate
A. Lightly tinted welding goggles
69
All hand tools should be inspected for _ A. size B. loose parts C. cleanliness D. All of the above.
B. loose parts
70
Gas cylinders should be ___. A. stored in an upright position B. always moved with the safety cap in place C. fastened with chains or steel bands D. All of the above.
D. All of the above.
71
Which of the following metals may create toxic or deadly fumes when welded? A. Beryllium B. Lead C. Cadmium D. All of the above.
D. All of the above.
72
Fire extinguishers and fire blankets should be mounted on a surface that is painted A. orange B. yellow C. yellow and black D. red E. light blue
D. red
73
Which of the following are dangerous light rays developed during oxyfuel gas welding or cutting? A. Incandescent B. Fluorescent C. Ultraviolet D. All of the above.
C. Ultraviolet
74
A Class B fire extinguisher is used to extinguish ____ fires. A. combustible liquid B. electrical C. solid material D. combustible metal
A. combustible liquid
74
Which of the following is not a factor to consider regarding the hazard of fumes and gases? A. Lack of general ventilation B. Confined area C. Wetness D. Electrode type
C. Wetness
75
Documents that detail information about chemicals and substances used in the workplace are called -_ A. Safety Data Sheets B. Material Data Sheets C. Hazard Information Sheets D. Fire Safety Sheets
A. Safety Data Sheets
76
Which of the following processes uses a consumable flux-covered metal electrode? A. SMAW B. GMAW C. GTAW D. All of the above.
A. SMAW
76
In the ____ process, a wire feeder continuously supplies metal electrode, which comes in the form of wire on a large spool. A. SMAW B. GTAW C. GMAW D. All of the above.
C. GMAW
77
In FEAW, the flux material that cleans and shields the weld area is .. A. On the electrode wire B. applied ahead of the weld through a hopper C. in the hollow electrode D. applied with a brush
C. in the hollow electrode
78
Which statement about GTAW is false? A. The welder manually operates the tungsten electrode holder and the filler rod. B. The GTAW process is used on nonferrous metals. C. GTAW produces no metal spatter. D. A consumable tungsten electrode is used
B. The GTAW process is used on nonferrous metals.
79
Which of the following is used to clean the metal during torch brazing? A. A flux B. A strong detergent soap C. Water at a temperature above 180°F (82°C) D. Soapstone
A. A flux
80
During brazing, which of the following may present health hazards? A. Zinc B. Beryllium C. Cadmium or phosphorus D. All of the above.
D. All of the above.
81
In the oxyfuel gas cutting process, a jet of of the steel after the metal is heated to a melting temperature. causes the rapid oxidation or burning A. air under pressure B. high-pressure acetylene C. pure oxygen D. water
C. pure oxygen
82
Flash welding is a(n)____process. A. arc welding B. solid-state welding C. explosion welding D. resistance welding
D. resistance welding
83
The letters FW stand for __ A. friction stir welding B. flash welding C. friction welding D. flux welding
B. flash welding
84
Why is submerged arc welding referred to as submerged? A. The arc is submerged in or covered by a thick layer of flux material and cannot be seen. B. The welding is done under water. C. The arc is covered by a thick layer of filler material. D. The base metal is submerged and the arc is shielded by an inert gas.
A. The arc is submerged in or covered by a thick layer of flux material and cannot be seen.
85
What prevents the shoes in ESW from becoming welded to the base metal? A. The shoes are coated with a nonstick material prior to welding. B. The shoes are made of a material that cannot be welded to the base metal. C. All ESW shoes are lined with ceramic material. D. The shoes are water-cooled and generally made of copper.
D. The shoes are water-cooled and generally made of copper.
86
Which welding process is generally used to attach bolts, screws, nails, and rods to metal surfaces? A. CAC B. SAW C. SW D. SNR
C. SW
87
Solid-state welding processes use - _ to heat the metals being joined. A. heat B. resistance C. a beam of energy D. None of the above.
D. None of the abov
88
Which welding process uses a tremendous shock wave to fuse (weld) the pieces together? A. EXW B. SW C. FW D. FOW
A. EXW
89
The term forging refers to_____ A. attaching metal fastening devices without drilling or tapping B. using a powerful shock wave to join metals together C. using hammer blows to fuse two pieces of heated metal together D. bringing a stationary and a rotating part together
C. using hammer blows to fuse two pieces of heated metal together
90
The depth of the weld in FSW is determined by A. the speed of retation ef the tee! B. the length of the small tapered prebe on the welding toe! C. the size ef the largest teel diameter D. the ferward speed ef the special too!
B. the length of the small tapered prebe on the welding toe!
91
Laser welding beams are directed to the weld joint using -.. A. magnetism B. mirrors C. a beam of electrons D. radiation
B. mirrors
91
Why is most electron beam welding done in a vacuum? A. Air generally interferes with the electron beam. B. Air cools the heat of the beam. C. The atmosphere contains too much moisture. D. A vacuum helps to draw the electrons from the welding machine.
A. Air generally interferes with the electron beam.
92
Electron beam welding uses a focused stream of _to heat and weld metals. A. light energy B. magnetic energy C. fuel gas and oxygen D. electrons
D. electrons