welding midterm!! Flashcards


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created 3 years ago by nomers23
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1

T/F PPE glasses/goggles must have Z87 or Z87+ marked on the frame

True

2

T/F Roll up sleeves and tuck in pant legs when wearing boots to prevent burns

False

3

T/F Any welding lens shade is permissible for all types of welding applications

False

4

T/F Infrared (IR) radiation cannot be felt

False

5

In most lab shops choosing shoes that are_______the ankle is the better choice

Above

6

T/F Cylinders must be secured and in the upright position when storing and using

True

7

T/F Regulators can be in place when moving cylinders

False

8

Protect cylinders from heat, mechanical shock and_______

Arcs

9

T/F Arc blow occurs when a magnetic field is developed while welding and causes the arc to move in an unpredictable manner

True

10

T/F The primary purpose of a shielding gas being present during the welding process is to protect the molten puddle from atmospheric contamination

True

11

T/F The amount of heat generated by GMAW arc is a function of both wire feed speed and the diameter of the wire

True

12

T/F A long arc length will decrease the arc voltage

False

13

T/F Using a weave pattern while placing a bead will increase the amount of heat in the weldment

True

14

Which polarity does not cause (magnetic) arc blow?

AC

15

Argon can be used as a shielding gas for the following processes

GMAW, GTAW, FCAW

16

With SMAW and a given amperage, which polarity will provide the deepest penetration of the bead?

DCEP

17

Which one of the following processes does a welder have some choice in the polarity selected for a given process electrode?

GTAW

18

T/F An edge joint is formed with two overlapping materials. The edges create fillet welds

False

19

T/F Reinforcement refers to the depth of the penetration

False

20

T/F Restricted position means that the welder's positioning when welding pipe is resticed. Areas to be welded are difficult to reach

True

21

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

22

T/F Pipe welding is comprised mostly of fillet welds

False

23

T/F A T-joint in the flat position is placed on the welding table so each plate is at a 45-degree angle to the table

True

24

T/F A double bevel groove weld has a bevel on both sides of only one plate

True

25

T/F A lap joint creates the geometry for fillet welds

True

26

T/F A 3F weld is a fillet weld completed in the horizontal position

False

27

The edges of a weld are the?

Toes

28

A_________joint is between two pieces of material that are aligned edge to edge in the same plane

Butt

29

For welding certification, a flat welding position groove is?

1G

30

If the weld symbol is_______the reference line, then the weld is to be completed on the side that the arrow is pointing to

Below

31

Which of the following identifies pipe positioned at a 45-degree angle?

6G

32

Cutting tips are made out of which alloy?

Copper or chrome plated

33

What could happen if acetylene was used with the wrong tip?

The tip could overheat causing a backfire, backlash, or explosion

34

What is the most widely used fuel gas used for cutting?

Acetylene

35

T/F The distance from the tip of the electrode to the base material being welded is arc length

True

36

T/F The SMAW process only uses AC polarity

False

37

T/F Alternating current (AC) is the preferred type of current for welding for SMAW

False

38

T/F The stops and re-starts necessary with SMAW electrodes increases the risk of weld defects

True

39

The most basic type of welder is?

Transformer

40

Which of the following is not part of the welding electrical circuit

None of the above

41

The transformer inside a welding power source converts high voltage, low amperage electricity into________electricity for welding

Low voltage, high amperage

42

To increase the penetration of a bead, you should select which welding polarity?

DCEP

43

Which polarity is also referred to as reverse polarity?

DCEP

44

Changes in the welding arc length will also change the following electrical characteristics?

Voltage

45

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

46

T/F DCEN polarity is used when welding in the GMAW process

False

47

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 the weld

True

48

T/F GMAW is suitable for use on just one few different metals

False

49

T/F GMAW exclusively uses inert shielding gas

False

50

A constant voltage system strives to keep which variables constant

Arc length

51

How is current carried to the arc in the GMAW process

The electrode is energized by the contact tip that then carries the current to the arc