What ampere range is required for setting 1.2mm filler wire for welding mild steel in MIG/MAG welding?
A. 50 – 100 Amps
B. 70 – 120 Amps
C. 90 – 150 Amps
D. 100 – 225 Amps
What is the temperature produced by chemical reaction in thermit welding?
A. 5000° C
B. 5000° F
C. 4000° C
D. 4000° F
Which type of welding is to be used to make joint of thick pipes of rails?
A. Thermit welding
B. Non – Pressure Thermit welding
C. Pressure Thermit welding
D. Fusion Thermit welding
Where is electron beam generated, controlled and accelerated?
A. Atmosphere
B. Electron gun
C. Transport system
D. Vacuum chamber
What is the source of heat to melt the work piece in an electron beam welding?
A. By heat
B. By high speed electrons
C. By beam heat
D. By current
Which welding process granulated flux is fed through hopper to the welding spot?
A. GTAW
B. SMAW
C. GMAW
D. SAW
What are the positions used in SAW?
A. Flat
B. Vertical
C. Overhead
D. Flat and horizontal
Which type of welds are often used to assist assembly or to maintain edge alignment during welding?
A. Root run weld
B. Level weld
C. Tack weld
D. Stringer bevel
What is the usual torch angle tilt on either side of vertical in GMAW?
A. 10° – 20°
B. 20° – 25°
C. 25° – 30°
D. 30° – 35°
What defects occur to a weld joint, if it is provided with insufficient heat input?
A. Lack of fusion
B. Lack of penetration
C. Lack of metal deposit
D. Uneven bead deposit
What is the solution if burn back occurs due to irregular wire feeding in GMAW process?
A. Cut out kink wire
B. Replace of spool
C. Cut the kink wire and replace spool
D. Adjusted to kinked wire again
Which metal surfacing method is ideal for thin layers that can flow to corner and edges of the job?
A. TIG welding
B. MIG welding
C. Oxy-acetylene welding
D. Submerged arc welding
Which type of core wire is suitable for welding carbon steel, alloy steel and stainless steel under FCAW?
A. Flux cored electrode
B. Gas shield flux wire
C. Used flux core and gas shielded
D. Flux is external and shielded
What is the distinct differences between GMAW and FCAW equipments?
A. Nozzle and torch
B. Construction of torch and feed rollers
C. Machine and torch
D. Feed rolls and gas cylinders
What is the name of metal transfer system in FCAW?
A. Dip transfer
B. Free flight transfer
C. Globular transfer
D. Purged transfer
Why the argon and CO2 mixture is used in FCAW?
A. Smooth spray transfer, with minimum slag
B. Smooth globular transfer
C. Smooth pulsed transfer
D. Smooth dip transfer
Why different type of pressure rollers are used in FCAW?
A. Knurled rollers
B. Without roller of travel wire
C. With pressure of tubular wire
D. Positive feeding without pressure on tubular wire
Which type of welding under FCAW, is more suitable for welding all types of steel?
A. Only use flux cored electrode
B. Only use gas shielding flux
C. Using flux cored and additional gas shielding
D. Flux is external and also gas external
What type of hand tool is used to open a gas cylinder in welding practice?
A. X key
B. Allen key
C. DE spanner
D. Spindle key
Why the welder’s cloth should be free from oil, grease etc, while welding?
A. To protect the job
B. To deflect the arc rays
C. To avoid catching fire
D. To safe guard your inner cloth