Deck 5: Shielded Metal Arc Welding of Pipe

Question 1

Noncritical piping assemblies found on structural items such as trailer axles and handrails ____.

A) get much of their strength from reinforcement but did not require 100% root penetration
B) must have 100% penetration
C) do not require uniform welds
D) get most of their strength from the joint design and not the weld

Answer 1

A

Question 2

The major problem that faces welders when welding pipe in the ____ position is that the area to be welded is often located in corners, and reaching the back side of the weld is difficult.

A) 6G 45 degree inclined
B) 2G vertical fixed
C) 5G horizontal fixed
D) 1G horizontal rolled

Answer 2

B

Question 3

The correct angle for the bevel at the end of a pipe is ____.

A) 27 1/2 degrees
B) 32 degrees
C) 35 1/2 degrees
D) 37 1/2 degrees

Answer 3

D

Question 4

A root opening that is wide or uneven must be welded ____.

A) uphill
B) downhill
C) uphill or downhill
D) as determined by established procedures

Question 5

The wall thickness for pipe is determined by its ____.

A) thickness in inches
B) U.S. standard sheet metal gauge
C) pressure range
D) thickness in millimeters

Question 6

____ in each pass shows a high degree of welder skill and increases the probability the weld will pass testing.

A) Confidence
B) Smoothness
C) Uniformity
D) Strength

Question 7

Aircraft airframes and racecar roll cages are examples of ________piping applications.

A) high-pressure
B) medium-pressure
C) high-structural
D) heavy-structural

Question 8

Highway signs and light posts are examples of ________piping applications.

A) high-pressure
B) medium-pressure
C) high-structural
D) heavy-structural

Question 9

The ____ position is thought to be the most difficult.

A) 6G 45 degree fixed inclined
B) 2G vertical fixed
C) 5G horizontal fixed
D) 1G horizontal rolled

Question 10

____ should always be located so that they are easily repairable.

A) Pipes
B) Welds
C) Bevels
D) Electrodes

Question 11

The Alaskan pipeline uses ____ piping.

A) light-weight
B) low-pressure
C) medium-pressure
D) high-pressure

Question 12

Pipe structures such as handrails and truck racks are examples of ___________ piping applications.

A) light-weight
B) light structural
C) heavy structural
D) medium structural

Question 13

Fitting pipe together and holding it in place for welding become ____ as the diameter of the pipe ____.

A) easier, gets larger
B) more difficult, gets smaller
C) more difficult, gets larger
D) easier, expands with heat

Question 14

The specification for the sizes of ____ are given as the inside diameter.

A) all pipes
B) all tubing
C) pipes 12 inches in diameter or smaller
D) pipes larger than 12 inches in diameter

Question 15

The ____ position is commonly used in fabrication shops where structures or small systems can be positioned for the convenience of the welder.

A) 6G 45 degree inclined
B) 2G vertical fixed
C) 5G horizontal fixed
D) 1G horizontal rolled

Question 16

The rate of change in welding position is ____ with ____ pipes.

A) slower, heavier
B) slower, large diameter
C) faster, large diameter
D) faster, heavier

Question 17

In the ____ position, it is necessary to continuously change the weld pattern, electrode angle, and weld speed.

A) 6G 45 degree fixed inclined
B) 2G vertical fixed
C) 5G horizontal fixed
D) 1G horizontal rolled

Question 18

____ tubing is commonly used to carry pressurized liquids or gases.

A) Rigid
B) Small diameter flexible
C) Electrical mechanical
D) Telescoping

Question 19

Arc strikes outside of the weld groove ____.

A) will crack as the pipe expands and contracts with heat
B) form hardness spots which strengthen the weld
C) should be made as often as possible
D) increase pipe durability by increasing the pipe flexibility around the weld area

Question 20

You can save time, resources, and energy when ____ electrodes are used for the entire weld because you can eliminate the need to grind the root pass.

A) E6011
B) E6012
C) E6014
D) E7018

Question 21

The maximum weld width of the cover pass should be _______ wider than the groove.

A) 1/16 in (1.6 mm)
B) 1/8 in (3 mm)
C) 3/32 in (2.4 mm)
D) 5/32 in (4 mm)

Question 22

____________________ electrodes such as E7018 and E11018 are commonly used on pipe welding projects.

Question 23

When beveling the ends of a pipe, the sharp inner edge of the bevel should be ground flat, forming a chamfer. This area is called a(n) ________________________.

Question 24

What is a dog used for?

A) It is used to align pipe ends for welding.
B) It is used to brace up piping systems.
C) It is a temporary plug to prevent gas leaks.
D) They can be used to collect fittings for welding.

Question 25

The melting point of steel is approximately ____________________ degrees Fahrenheit.

Question 26

A(n) ____________________ is used to quickly burn out small amounts of slag trapped along the edge of the root pass.

Question 27

Compare pipe to tubing.

Question 28

Explain the purpose of a hot pass.

Question 29

EMT is used as ____________.

A) electrical mechanical tubing
B) emergency medical tubing
C) low pressure gasses
D) light duty plumbing

Question 30

Slag is mostly composed of ____________________.

Question 31

In threaded pipe, as material flows through a pipe, less ____________________ is caused by unequal diameters.

Question 32

Which of the following is not an advantage of welded piping systems?

A) Lighter weight
B) Smoother flow
C) Corrosion free
D) Longer lasting

Question 33

Describe a root weld.

Question 34

The final covering on a weld is referred to as the ____________________.

Question 35

Small cracks between the threads in threaded pipe are likely spots for ____________________ to start.

Question 36

____________________ tubing is designed for the specific purpose of protecting electrical wiring.

Question 37

The maximum weld reinforcement of the cover pass should be _________.

A) 1/16 in (1.6 mm)
B) 1/8 in (3 mm)
C) 3/32 in (2.4 mm)
D) 5/32 in (4 mm)

Question 38

____________________ is caused by the surface tension of the molten metal trying to pull itself into a ball.

Question 39

Explain the proper bevel to prepare pipes for welding.

Question 40

____________________ tubing is normally used for structural applications.