Mid Term Flashcards
(98 cards)
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
C. fusible plug
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.
B. The number of cylinders.
A Dewar flask is used to ship __
A. liquid acetylene
B. hydrogen gas
C. liquid oxygen
D. All of the above.
C. liquid oxygen
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. 1/4” (6.4 mm)
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
B. results from acetylene being drawn from the cylinder too rapidly
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
D. Helium
The regulator is closed when the adjusting screw is turned in (clockwise).
A. True
B. False
A. True
With a manifold system, a master regulator controls the working pressure supplied to the torch at each welding station.
A. True
B. False
B. False
A broaching wire can be used to clean a torch tip orifice.
A. True
B. False
A. True
Petroleum products, such as grease or lubricating oil, burn easily in the presence of oxygen.
A. True
B. False
A. True
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
B. T-joint
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
C. thickness of the base metal
Information below the reference line refers to the ___ side of the weld.
A. right
B. left
C. arrow
D. other
C. arrow
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
B. groove weld size
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 staggered intermittent weld.
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
B. 6 inches
A _ work angle is commonly used for welding a fillet weld.
A. 0°
B. 20°
C. 30°
D. 45°
D. 45°
What does the following weld symbol represent?
A. Square groove
B. Back or backing
C. Melt-through
D. Concave
D. Concave
What does the following weld symbol represent?
A. U-groove
B. Surfacing
C. Melt-through
D. Fillet
C. Melt-through
What does the following weld symbol represent?
A. Flare-bevel groove
B. Weld all around
C. Seam
D. Stud
B. Weld all around
What does the following weld symbol represent?
A. Spot or projection
B. Edge
C. Field weld
D. Convex
A. Spot or projection
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. oxyfuel gas cutting
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
D. cutting oxygen flow will lower the oxygen preheat pressure set on the regulator
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
D. burn the metal and blow it out of the kerf