Red Seal Work Book 1

Front 1

What is another term for DCEP

Back 1

Reverse polarity

Front 2

To initiate an arc requires

Back 2

High voltage

Front 3

How much current will flow through a resistance of 200 ohms when 100 volts is applied

Back 3

0.5 amps

Front 4

The generator consists of rotating conductors in a stationary magnetic field and an alternator consists of a rotating magnetic field inside the conductor windings

Back 4

True

Front 5

When using SMAW the welding cables represent a series circuit where should voltage be measured

Back 5

From the electrode holder to the work lead

Front 6

What type of power supply is required for GTAW

Back 6

Constant current

Front 7

One of the simplest ways of controlling the output of a welding Transformer is to change the efficiency of coupling how can this be done

Back 7

Designed the Transformer with either a moving core or moving primary coils

Front 8

What is the term for voltage measured across the output terminals of a welding machine when no current is being drawn

Back 8

Open circuit voltage

Front 9

Which metal has the lowest electrical resistivity

Back 9

Copper

Front 10

Transformer with more windings in the primary than the secondary is what kind of Transformer

Back 10

Step down

Front 11

A Transformer works on what type of current

Back 11

AC

Front 12

What is a unit of measure for electromotive force

Back 12

Volt

Front 13

What is the unit of measure for frequency

Back 13

Hertz

Front 14

In a constant voltage output system increasing tip to work distance increases the resistance in the power circuit what is the effect on current flow

Back 14

Decreases the current

Front 15

How much current will flow through a resistance of 50 ohms when 25 volts is applied

Back 15

0.5 amps

Front 16

Which type of power is best suited for manual welding

Back 16

Constant current

Front 17

An arc welding power source which has an unchanged potential is called

Back 17

Constant voltage

Front 18

What is the open circuit voltage

Back 18

Voltage potential without power flowing

Front 19

Resistance is measured in which of the following terms

Back 19

Ohms

Front 20

A rectifier is a device that is used to

Back 20

Convert AC to DC

Front 21

Batteries produce what type of current

Back 21

DC

Front 22

Arc blow caused by magnetic forces in the current flow can be greatly reduced or eliminated by

Back 22

Switching weld current to AC

Front 23

Residential power in Canada is supplied at what value

Back 23

120v to 240v single phase

Front 24

How long can a welding machine rated at 60% duty cycle operate continuously at its rated output

Back 24

6 minutes out of 10 minutes

Front 25

Purging gas is used during GTAW to

Back 25

Protect the root from oxygen and nitrogen

Front 26

Which of the following is used as a shielding gas for GTAW

Back 26

Argon

Front 27

When is a gas lens used with GTAW

Back 27

To improve shielding of the weld pool

Front 28

Which type of current is used for GTAW of stainless steel

Back 28

DCEN

Front 29

What is a suitable shielding gas flow rate for GTAW on DCEN using a # 6 gas cup

Back 29

5 l/min (11chf)

Front 30

Which of the following designates an unalloyed tungsten

Back 30

EWP

Front 31

Post flow of shielding gas when GTA welding is used to

Back 31

Protect the weld pool while Cooling

Front 32

The GTAW process can be performed

Back 32

Without filler metal

Front 33

What colour band would identify 2% thoriated tungsten

Back 33

Red

Front 34

What unit of calibration is used for flow metres

Back 34

LPM/CFH

Front 35

What is an autogenous weld

Back 35

A weld produced without the use of a filler metal

Front 36

How would you reduce suck back on a root weld using GTAW

Back 36

Reduce weld amperage

Front 37

A flow metre would be installed with the sight glass in which position

Back 37

Upright

Front 38

Which tungsten would you expect to see bald after striking an arc

Back 38

Pure tungsten using AC

Front 39

Why is argon used as a shielding and purging gas

Back 39

Argon is heavier than air

Front 40

DCEN polarity is an arrangement where the work lead is connected to the negative terminal of the power supply

Back 40

False

Front 41

For the SMAW process which type of power supply is preferable

Back 41

Constant current

Front 42

Excessive spatter and undercut of a weld bead can be caused by

Back 42

High current

Front 43

When a power source is set to the high end of a low-range how does the power source respond to a longer Arc

Back 43

Decreases current

Front 44

Select the correct statement about welding cables

Back 44

Voltage drop will decrease as diameter increases

Front 45

When using a E4918 electrode the arc is seem to be pulsing what is the likely cause

Back 45

Wrong polarity

Front 46

Select the correct statement about a 7018 electrode

Back 46

It should be kept in an electrode oven

Front 47

Which electrode is not suitable for overhead position welding

Back 47

E7048/4948

Front 48

What is the effect of increasing current

Back 48

More penetration

Front 49

Which electrode can be used to check for polarity

Back 49

E6010

Front 50

An electrode holder is rated by which of the following

Back 50

It's Amp carrying capacity

Front 51

Which electrode requires a relative humidity of 20 to 70% moisture

Back 51

Exx10

Front 52

Which type of electrode should not be stored in a rod oven

Back 52

Cellulosic

Front 53

Electrodes should be stored in a rod oven at what temperature

Back 53

120°C

Front 54

Electrodes that are exposed to the environment for more than 4 hours should be

Back 54

Rebaked at 372-430°C or as recommended by the manufacturer

Front 55

Which electrode is most suitable for the joining of mild steel to stainless steel

Back 55

309L

Front 56

Which GMAW transfer mode is most prone to incomplete Fusion

Back 56

Short Circuit

Front 57

They required electrode extension for short circuit transfer is

Back 57

1/4-1/2 in.

Front 58

The GMAW method that uses low currents and low voltages for all position welding is

Back 58

Short circuit transfer

Front 59

When GMA welding how is the shielding gas controlled

Back 59

Flow meter

Front 60

Power supply set to constant current mode requires a

Back 60

Voltage sensing wire feeder

Front 61

The rate at which the process moves along the weld joint is called the

Back 61

Current travel speed

Front 62

GMAW in gobular transfer mode

Back 62

Is usually avoided due to spatter

Front 63

The distance from the end of the contact tube to the weld pool is

Back 63

Tip to work distance

Front 64

The GMAW process protects the weld pool through the use of

Back 64

Inert or reactive gases

Front 65

When welding the first pass of thick Groove joints with weld backing

Back 65

The first pass is done using a drag technique

Front 66

The GMAW method that uses surges of current and voltage for all position welding without spatter is

Back 66

Pulsed spray transfer

Front 67

Which shielding medium is most often used for carbon steel in short circuit transfer mode

Back 67

100% carbon dioxide

Front 68

A power supply set to constant voltage mode requires a

Back 68

Constant speed wire feeder

Front 69

GMAW systems are usually connected as

Back 69

Electrode positive

Front 70

When using a short circuit transfer mode

Back 70

The contact tip extends out of the gas cup

Front 71

A wire hang up in the drive rollers is also referred to as what

Back 71

Bird-nesting or nesting

Front 72

What is the maximum distance for pushing wire using a push type drive system

Back 72

4.5 meters (15 feet)

Front 73

What shielding gas may require inline heater at high flow rates

Back 73

C02

Front 74

What do the letters GS mean in the following type of electrode ER70S-GS

Back 74

Intended for single pass only

Front 75

What does the letter C stand for in the following type of electrode ER70C-X

Back 75

Composite filler metal

Front 76

What is the difference between FCAW and GMAW

Back 76

GMAW requires external shielding gas

Front 77

a "49" in the FCAW electrode classification E491 T3 indicates

Back 77

tensile strength

Front 78

Three groups of tubular electrodes are

Back 78

Self shielded gas shielded and metal cored

Front 79

Why is a shielding gas composition and important variable in FCAW/MCAW

Back 79

Weld Properties are affected

Front 80

Basic FCAW electrodes can have lower operator appeal due to the flux system. why are they used

Back 80

Lower hydrogen weld metal than rutile type

Front 81

What is the normal electrode extension for FCAW-S

Back 81

1 1/2 - 2 1/2 in.

Front 82

What type of roller is best suited for flux cored electrodes

Back 82

knurled Drive

Front 83

according to CSA W48-01 in what welding position would E492T-5 electrode be used

Back 83

Flat Groove welds and flat and horizontal fillets

Front 84

Which statement is the most correct regarding penetration

Back 84

Self shielded electrodes do not penetrate as deeply as gas shielded wires

Front 85

Compared to GMAW and SMAW self shielded tubular electrodes produce what

Back 85

Greatest amount of fume particles