Deck 5: Shielded Metal Arc Welding of Pipe

Question 1

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

Answer 1

D

Question 2

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

Answer 2

A

Question 3

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

Answer 3

C

Question 4

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

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

Question 5

The bead width should not be more than ____ times the rod diameter.

A) two
B) three
C) four
D) five

Question 6

The Alaskan pipeline uses ____.

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

Question 7

Penetration and buildup are controlled more easily with the pipe in the ____ position.

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

Question 8

The specification for the size of ____ is given as the outside diameter.

A) all pipes
B) pipes smaller than 6 inches in diameter
C) pipes smaller than 12 inches in diameter
D) pipes larger than 12 inches in diameter

Question 9

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 10

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 11

Pipe used in high-pressure and heavy structural applications ____.

A) must have 100% penetration over most of the joint
B) does not require 100% penetration, although penetration must be uniform
C) must have 100% root penetration over 100% of the joint
D) does not require 100% root penetration but must cover 100% of the joint

Question 12

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 13

____ 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 14

The welds on ____ piping systems must be as strong or stronger than the pipe itself.

A) critical
B) all
C) medium-pressure
D) low-pressure

Question 15

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

A) get much of their strength from reinforcement but should have 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

Question 16

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

Question 17

Highway signs and light posts are examples of ________piping applications.

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

Question 18

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

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

Question 19

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

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

Question 20

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

Question 21

​The wall thickness for tubing is measured in ____________.

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

Question 22

The ____ position is the most commonly used pipe welding position.

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

Question 23

When welding in the 2G vertical fixed position, to reduce the ____ the bottom of the weld, increase the electrode-to-work angle.

A) visual defects at
B) number of weld beads at
C) sagging of
D) arc strikes near

Question 24

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

Question 25

​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 26

​When making practice welds, pipe shorter than 1 1/2 inches _________.

A) ​is easier to fit up
B) ​lets you see the root surface easier
C) ​overheats rapidly
D) ​is harder to position for 6G welding

Question 27

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

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

Question 28

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 29

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

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

Question 30

​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 31

​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 32

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 33

​EMT is used as ____________.

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

Question 34

____________________ tubing is normally used for structural applications.

Question 35

​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 36

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 37

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 38

​Not having to over-tighten or under-tighten fittings is ___________.

A) ​a common reason that pipe unions are used
B) ​an advantage for alignment of parts
C) ​commonly used when pipe is used as a structural application
D) ​a skill that takes time for pipe fitters to develop

Question 39

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

Question 40

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

Question 41

Explain the correct sequence of steps to complete a weld in the 2G vertical fixed position.

Question 42

Describe a root weld.

Question 43

Compare pipe to tubing.

Question 44

Slag is mostly composed of ____________________.

Question 45

Explain the proper bevel to prepare pipes for welding.

Question 46

The melting point of steel is approximately ____________________ degrees Fahrenheit.

Question 47

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

Question 48

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

Question 49

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

Question 50

Explain the purpose of a hot pass.