Dielectric is used in
Answer: C
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In a metal arc welding process, metal transfer across the arc may take place by a method of material transfer where the metal transfers across the arc is in larger drops. This is at the rate of 100 drops/sec or less, what is this known as
Answer: D
In Dip transfer method, the metal transfer across the arcs in larger drops at the rate of 100 drops / sec or less. The drops are large enough to short circuit the electrical flow across the arc. This process is used for welding thin metal joints and for poor fit up joints. In this method, the current values are much lower. Here special arc current power supplies are needed to overcome the short circuit moment that occurs across the arc.
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Hot rolling of mild steel is carried out
Answer: D
Hot rolling of metal means working of metals when heated sufficiently (above the re-crystallizing temperature) to make them plastic and easily worked.
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The percentage of carbon in gray cast iron is in the range of
Answer: C
Gray cast iron is the most widely used of all cast irons. In fact, it is common to speak of gray cast iron just as cast iron. It contains 3 to 4?nd 2.5 % Si.
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During the execution of a CNC part program block
NO20 GO2 X45.0 Y25.0 R5.0 ; the type of tool motion will be
Answer: A
Given:-NO20 GO2 X45.0 Y25.0 R5.0
Here term X45.0 Y25.0 R5.0 will produce circular motion because radius is consider in this term and GO2 will produce clockwise motion of the tool.
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What is the name of the device used in arc welding circuits for the purpose of modifying the rate of current change when the weld road is varied rapidly?
Answer: C
Inductor, a device used in arc welding circuits for the purpose of modifying the rate of current change when the welding load is varied rapidly.
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In order to have interference fit, it is essential that the lower limit of the shaft should be
Answer: A
The interference is the amount by which the actual size of a shaft is larger than the actual finished size of the mating hole in an assembly. For interference fit, lower limit of shaft should be greater than the upper limit of the hole.
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In an orthogonal cutting, the depth of cut is halved and the feed rate is double. If the chip thickness ratio is unaffected with the changed cutting conditions, the actual chip thickness will be
Answer: A
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The common welding error that occurs due to wrong speed, faulty preparation, and high / low current, improper electrode size is called?
Answer: D
Poor fusion could be due to wrong speed, faulty preparation, and high / low current, improper electrode size.
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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
Answer: B
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