What procedure is to be followed for welding pipes under 6G position?
A. Pipe not rotated weld vertical
B. Rotate pipe and deposit weld vertical
C. Pipe not rotated weld deposit horizontal
D. Pipe not rotated and pipe axis 45° angle deposit weld flat, vertical
Which element filler rod is used to weld stainless steel plates?
A. Osmium
B. Podium
C. Argentum
D. Molybdenum, columbium
Which are the common alloying element of brass?
A. Copper and tin
B. Bismuth and tin
C. Antimony and tin
D. Copper and zinc
Which of the following aluminium alloys consists of 1% iron & silicon?
A. Duralumin
B. Wrought alloy
C. Aluminium cast alloy
D. Commercially pure aluminium
What is the purpose of cleaning of sheets before doing gas welding?
A. To avoid over lap
B. To avoid porosity
C. To avoid under cut
D. To Control distortion
Which type welding uses a non – ferrous filler with melting point above 450° than base metal?
A. Brazing
B. Soldering
C. Arc welding
D. Gas welding
Which welding process enables to weld dissimilar metals?
A. Brazing
B. Seam welding
C. Spot welding
D. Fusion welding
What type of gas flame is used to weld 2mm mild steel by brazing method?
A. Neutral flame
B. Carburising flame
C. Oxidising flame
D. Oxy-hydrogen flame
Which system of welding is free from “Arc blow”?
A. AC welding
B. DC Reverse polarity
C. DC straight polarity
D. Welding with long arc
What is the effect of expansion and contraction due to heat in welding?
A. Peening
B. Arc blow
C. Distortion
D. Metal force
Which one of the following methods of welding is not a method used to control distortion?
A. Skip welding
B. Back step welding
C. Right hand welding
D. Intermittent welding
Which one of the below is to control distortion?
A. Use large size electrode
B. Use small size electrode
C. Use few passes with large electrode
D. Use more passes with small electrode
What is the rule for deciding the length of intermediate tacks?
A. 3 to 4 times plate thickness
B. 2 to 3 times plate thickness
C. 5 times the plate thickness
D. 50mm irrespective of plate thickness
Which type of cast iron offers greater resistance to shock?
A. Grey cast iron
B. White cast iron
C. Nodular cast iron
D. Malleable cast iron
Which type of cast iron possess higher compressive strength?
A. Grey cast iron
B. White cast iron
C. Nodular cast iron
D. Malleable cast iron
What is the angle of pipe axis with the base for making an elbow joint?
A. 30°
B. 45°
C. 75°
D. 90°
What method is followed to make a circular gas cutting?
A. Using hand as a guide
B. Using a guide clamp fitted to torch body
C. Step by step cutting circular segments
D. Manual rotation on the circumference of the circle
Why deposited bead is not in uniform size?
A. Incorrect flame setting
B. Wrong angle of blow pipe
C. Wrong angle of filler rod
D. Variation in speed of travel and angle
Which element is present in contact electrodes in large proportion?
A. Carbon
B. Silicon
C. Manganese
D. Iron powder
Which size of filler rod should be used to weld 2.5mm thick plates,using nozzle 5 by leftward technique?
A. 1.60 mm
B. 2.00 mm
C. 2.50 mm
D. 3.15 mm