RED SEAL Exam Questions 100%
Correct Solutions
When using SMAW the welding cables represent a series circuit. Where should
voltage be measured? - ANSWER from the electrode holder to the work lead.
What type of power supply is required for GTAW? - ANSWER constant current
One of the simplest ways of controlling the output of welding transformer is to
change the efficiency of coupling . How can this be done ? - ANSWER design the
transformer with either a moving core or moving primary coils.
What is the term for voltage measured across the output terminals of a welding
machine when no current is being drawn? - ANSWER open circuit voltage
Which metal has the lowest electrical resistivity? - ANSWER copper
a transformer with more windings in the primary than in the secondary is what
kind transformer ? - ANSWER step down
a transformer works on what type of current ? - ANSWER AC
What is the unit of measure for electromotive force ? - ANSWER volt
What is the unit of measure for frequency? - ANSWER hertz
,In constant voltage output system increasing tip to work distance increases the
resistance in the power circuit . What is the effect on current flow? - ANSWER decreases
the current
How much current will flow through a resistance of 50 ohms when 25 volts is applied?
- ANSWER 0.5 amps
Which type of power is best suited for manual welding? - ANSWER constant current
An arc welding power source which has an unchanging potential voltage is called what
? - ANSWER constant voltage
What is the open circuit voltage ( OCV)? - ANSWER voltage potential without
power flowing
Resistance is measured in which of the following terms ? - ANSWER ohms
a rectifier is a device that used to? - ANSWER convert AC to DC
Batteries produce what type of current? - ANSWER DC
Arc Blow caused by magnetic forces the current flow can be greatly reduced or
eliminated by ? - ANSWER switching weld current to AC
Residential power in Canada is supplied at what value ? - ANSWER 120v to 240v single
phase
, How long can welding machine rated at 60 % Duty Cycle operate continuously at
its rated output ? - ANSWER 6 minutes out of 10 minutes
Purging gas is used during GTAW to? - ANSWER protect the root fron oxygen and
nitrogen
Which of the following is used as a shielding gas for GTAW ? - ANSWER argon
When is a gas lens used with GTAW ? - ANSWER to improve shielding of the weld pool
Which type of current is used for GTAW of stainless steel ? - ANSWER DCEN
What a suitable shielding gas flow rate for GTAW on DCEN using a # 6 gas cup ?
- ANSWER 5 L/min (11cfh)
Which of the following designates an " unalloyed " tungsten ? - ANSWER EWP
Post flow of shielding gas when GTA welding is used to? - ANSWER protect the
weld pool while cooling
The GTAW process can be performed : - ANSWER without filler metal
What colour band would identify 2 % thoriated tungsten ? - ANSWER red
What unit of calibration is used for Flow Meters - ANSWER LPM/CFH
Correct Solutions
When using SMAW the welding cables represent a series circuit. Where should
voltage be measured? - ANSWER from the electrode holder to the work lead.
What type of power supply is required for GTAW? - ANSWER constant current
One of the simplest ways of controlling the output of welding transformer is to
change the efficiency of coupling . How can this be done ? - ANSWER design the
transformer with either a moving core or moving primary coils.
What is the term for voltage measured across the output terminals of a welding
machine when no current is being drawn? - ANSWER open circuit voltage
Which metal has the lowest electrical resistivity? - ANSWER copper
a transformer with more windings in the primary than in the secondary is what
kind transformer ? - ANSWER step down
a transformer works on what type of current ? - ANSWER AC
What is the unit of measure for electromotive force ? - ANSWER volt
What is the unit of measure for frequency? - ANSWER hertz
,In constant voltage output system increasing tip to work distance increases the
resistance in the power circuit . What is the effect on current flow? - ANSWER decreases
the current
How much current will flow through a resistance of 50 ohms when 25 volts is applied?
- ANSWER 0.5 amps
Which type of power is best suited for manual welding? - ANSWER constant current
An arc welding power source which has an unchanging potential voltage is called what
? - ANSWER constant voltage
What is the open circuit voltage ( OCV)? - ANSWER voltage potential without
power flowing
Resistance is measured in which of the following terms ? - ANSWER ohms
a rectifier is a device that used to? - ANSWER convert AC to DC
Batteries produce what type of current? - ANSWER DC
Arc Blow caused by magnetic forces the current flow can be greatly reduced or
eliminated by ? - ANSWER switching weld current to AC
Residential power in Canada is supplied at what value ? - ANSWER 120v to 240v single
phase
, How long can welding machine rated at 60 % Duty Cycle operate continuously at
its rated output ? - ANSWER 6 minutes out of 10 minutes
Purging gas is used during GTAW to? - ANSWER protect the root fron oxygen and
nitrogen
Which of the following is used as a shielding gas for GTAW ? - ANSWER argon
When is a gas lens used with GTAW ? - ANSWER to improve shielding of the weld pool
Which type of current is used for GTAW of stainless steel ? - ANSWER DCEN
What a suitable shielding gas flow rate for GTAW on DCEN using a # 6 gas cup ?
- ANSWER 5 L/min (11cfh)
Which of the following designates an " unalloyed " tungsten ? - ANSWER EWP
Post flow of shielding gas when GTA welding is used to? - ANSWER protect the
weld pool while cooling
The GTAW process can be performed : - ANSWER without filler metal
What colour band would identify 2 % thoriated tungsten ? - ANSWER red
What unit of calibration is used for Flow Meters - ANSWER LPM/CFH
