WELDER IMPORTANT NIMI BASED MCQ

What is the purpose of copper coating on mild steel filler rod used in gas welding?
A. Rust proof
B. Water proof
C. Moisture proof
D. Increased filler dia

Which metal in welding process is subjected to “Weld decay” defect?
A. Brass
B. Copper
C. Mild steel
D. Stainless steel

Which filler rod is used for bronze welding of cast iron, malleable iron and copper?
A. Manganese, Bronze, filler rod
B. Copper, Phosphorus, filler rod
C. Copper, Phosphorus alloy filler rod
D. Copper, Zinc, Nickel filler rod

What does the third digit of AWS codification in EB 5426HJX represent?
A. Type of current
B. Type of covering
C. Type of tensile strength
D. Type of welding position

Which accessory is used to protect the eyes during gas welding?
A. Helmet
B. Hand screen
C. Colour goggles
D. Grinding goggles

What is the composition of acetylene gas?
A. C – 72.3% H – 27.7%
B. C – 82.3% H – 17.7%
C. C – 90% H – 10%
D. C – 92.3% H – 7.7%

Which size of CCMS filler rod is to be used for welding plate of 8mm thick with ‘V’ edge preparation?
A. 3.15 mm Ø
B. 4.0 mm Ø
C. 5.0 mm Ø
D. 6.3 mm Ø

How many segments are to be selected for welding 50 mm j pipe?
A. 3 segments
B. 4 segments
C. 6 segments
D. 8 segments

What type of edge preparation is needed, for gas welding a pipe, with wall thickness 6mm?
A. Single “V”
B. Single bevel
C. Square edge with root gap
D. Square edge without root gap

How many equal divisions should be made while developing a “T” pipe joint?
A. 4 equal divisions
B. 6 equal divisions
C. 9 equal divisions
D. 12 equal divisions

What is the name of small metal particles which are thrown out of the arc during welding?
A. Slag
B. Spatters
C. Stub end
D. Weld metal

How the construction of a nozzle for gouging is identified?
A. Straight nozzle with single preheating hole
B. Bent nozzle with sectorial preheating holes
C. Fully bent nozzle with circular preheating holes
D. Slightly bent nozzle with circular preheating six holes

What does the fourth digit indicate as per AWS electrode coding?
A. Welding current
B. Tensile strength
C. Welding position
D. Type of flux coating

Which type of stainless steel is weldable?
A. Nickel type
B. Ferrite type
C. Stabilized type
D. Chromium type

What is the pre-heating temperature of cast iron?
A. 200 to 310°C
B. 250 to 350°C
C. 300 to 350°C
D. 350 to 450°C

What is the root run?
A. Backing run
B. The first run is root run
C. The third run is root run
D. The second run is root run

What do you call the non – coated electrodes?
A. Row electrode
B. Bare electrode
C. Base electrode
D. Deep penetration electrode

How is the electrode size identified?
A. Length of electrode
B. Thickness of flux coated
C. Diameter (over all) of electrode
D. Diameter of inner core wire

What are the standard electrode lengths available?
A. 250 mm and 350 mm
B. 350 mm and 450 mm
C. 400 mm and 500 mm
D. 500mm and 600mm

What is the grade of hacksaw blades with pitch 0.8mm?
A. Fine
B. Medium
C. Course
D. Rough