Related Questions

Thermit welding is often used in
A Replacing broken gear teeth
B Repairing broken shears
C Joining rails, truck frames and locomotive frames etc.
D All of the above
The advantage of thermit welding is that
A All parts of the weld section are molten at the same time
B Weld cools almost uniformly
C Results in a minimum problem with internal residual stresses
D All of the above
In backhand welding, the angle between the welding rod and the work is ________ as compared to forehand welding.
A Same
B Less
C More
D None of these
In forehand welding, the angle between the welding torch and the work is ________ as compared to backhand welding.
A Same
B Less
C More
D None of these
If the flame of the welding torch is directed towards the progress of welding, then what will you call the welding technique?
A Forehand welding
B Flux cored ARC welding
C Electro slag welding
D Pulsed spray welding
In DC arc welding, if leads are arranged in work as Negative pole of the welding arc and electrode as Positive pole of the welding arc, the arrangement is known as
A Fusion
B Reverse polarity
C Forward welding
D Direct polarity
A type of welding flows, which is the result of a perfect proportion and mixture of acetylene and oxygen and is used for fusion welding of steel and cast iron, is
A Carburizing flame
B Oxidizing flame
C Oxy-acetylene flame
D Neutral flame
A mixture contains 2/5 of element A and 3/5 of element B. When 5ml of A is added to the mixture, the proportion of B in the mixture changes to 1/5. What amount of A was originally present in the mixture before the addition was made ?
A 1ml
B 1.5ml
C 2.5ml
D 6ml
A jar contains a mixture of oil and water in the ratio 22 :3 . 50 litres of the mixture was taken out and 25 litres of water was added to it. If water was 34% in the resultant mixture, what was the initial quantity of the mixture (in litres ) in the jar?
A 175
B 150
C 75
D 125
Spot welding is used for welding
A Lap joints in plates having 0.025 mm to 1.25 mm thickness
B Lap joints in plates having thickness above 3 mm
C Butt joints in plates having 0.025 mm to 1.25 mm thickness
D Butt joints in plates having thickness above 3 mm

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