only questions(26,29,30,31,33,34,39,41) (a) Inherent 6 (c) Service (d) None of t
ID: 2305350 • Letter: O
Question
only questions(26,29,30,31,33,34,39,41)
(a) Inherent 6 (c) Service (d) None of the above Processing 19. An internal rupture caused by working steel at improper temperatures is called a: (a) Lap (b) Cold shut Forging burst (d) Slag inclusion 20. Cracks which are caused by alternating stresses above a critical level are called: (a) Stress corrosion cracks (b) Cycling cracks (c) Critical cracks @ Fatigue cracks 21. Cracks which are caused by a combination of tensile stress and corrosion are called: Stress corrosion cracks (b) Cycling cracks (c) Critical cracks (d) Fatigue cracks 22. Which of the following are ferromagnetic materials? (a) Aluminium, iron, copper (b) Iron, copper, nickel (c) Copper, aluminium, silver Iron, cobalt, nickel 23. The reverse magnetising force necessary to remove a residual magnetic field from a test piece after it has been magnetically saturated is called: (a) Hysteresis D Coercive force (c) Demagnetising flux (d) Reverse saturation 24. Magnetic lines of force enter and leave a magnet at: a) Saturation (b) L/D ratios of greater than 4 to 1 (c) Flux concentration points @ Poles 25. The ease with which a magnetic field can be established in a test piece is called: (a) Reluctance (b) Retentivity Permeability (d) Electromagnetism 26. A magnetic field which is contained completely within the test piece is called a: (a) Confined field- (b) Longitudinal field Circular field (d) Saturated field 27. Which of the following produces a circular field? (a) Coil Head shot (c) Yoke (d) All of the aboveExplanation / Answer
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26. Confined magnetic field is something that is generally used in nuclear fusion process to contain the reactions in the form of a plasma that is in turn controlled and confined by using a very strong magnetic field. This field that confines the plasma within the described region is something that is being referred here. Also, it should be noted that in case of a longitudinal field also we have sort of confined field but there is leakage along the sides and at the one end so that one rules out. Therefore we have (a).
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