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Electric welding
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q21 ⇒ For arc welding, D.C. is produced by which of the following ? Motor-generator set [other wrong options] [Discuss in forum] Regulator Transformer None of the above |
Q22 ⇒ In seam welding any of the above [other wrong options] [Discuss in forum] the work piece is fixed and disc electrodes move the work piece moves but rotating electrodes are fixed none of the above |
Q23 ⇒ Galvanising is a process of applying a layer of zinc [other wrong options] [Discuss in forum] aluminium lead copper |
Q24 ⇒ During carbon arc welding if electrode is connected to positive carbon will have tendency to go into the weld joint [other wrong options] [Discuss in forum] arc will be dull arc will not strike metal will not melt |
Q25 ⇒ Which of the foK-wing methods is normally not preferred for welding of chromium molyblenum steels ? Resistance welding [other wrong options] [Discuss in forum] Oxyacetylene welding Thermit welding Submerged arc welding |
Q26 ⇒ The welding load is always intermittent [other wrong options] [Discuss in forum] continuous but varying continuous and constant none of the above |
Q27 ⇒ Steel rails are welded by Thermit welding [other wrong options] [Discuss in forum] Gas welding Resistance welding Argon arc welding |
Q28 ⇒ ____ welding process uses consumable electrodes. MIG [other wrong options] [Discuss in forum] TIG Laser All of the above |
Q29 ⇒ In arc welding major personal hazards are all of the above [other wrong options] [Discuss in forum] flying sparks weld spatter harmful infrared and ultra-violet rays from the arc |
Q30 ⇒ A seamless pipe has no joint [other wrong options] [Discuss in forum] steam welded joint spot welded joint arc welded joint |
Q31 ⇒ In which of the following methods of welding the molten metal is poured for joining the metals ? Thermit welding [other wrong options] [Discuss in forum] Gas welding. TIG welding Arc welding |
Q32 ⇒ The welding of aluminium alloy entails which of the following problems ? All of the above [other wrong options] [Discuss in forum] High tlermal conductivity quick dissipating heat On melting becomes thin liquid- tendency to run off Low specific resistance requiring heavy current |
Q33 ⇒ TIG welding is tungsten inert gas welding [other wrong options] [Discuss in forum] thorium iodine gas welding thermally induced gas welding temperature insulated gas welding |
Q34 ⇒ In ultrasonic welding the frequency range is generally 4000 to 20000 Hz [other wrong options] [Discuss in forum] 2000 to 3000 Hz 30000 to 40000 Hz 50000 to 80000 Hz |
Q35 ⇒ Which of the following equipment is used for arc welding generally used for arc welding ? Transformer [other wrong options] [Discuss in forum] Single phase alternator Two phase alternator Three phase alternator |
Q36 ⇒ In spot welding composition and thickness of the base metal decides all above [other wrong options] [Discuss in forum] the amount of squeeze pressure hold time the amount of weld current |
Q37 ⇒ Motor-generator set for D.C. arc welding has generator of level compound type [other wrong options] [Discuss in forum] series type shunt type differentially compound type |
Q38 ⇒ In atomic hydrogen welding the electrode is made of tungsten [other wrong options] [Discuss in forum] carbon graphite mild steel |
Q39 ⇒ During carbon arc welding electrode is negative with respect to the work if D.C. is used [other wrong options] [Discuss in forum] electrode is connected to neutral if A.C. is used electrode is not connected to any voltage source when A.C. is used electrode is positive with respect to the work if D.C. is used |
Q40 ⇒ Flux used in TIG welding is none [other wrong options] [Discuss in forum] borax ammonium chloride ash |
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