PRODUCTION SYSTEM INTERVIEW QUESTIONS 2013

MECH TECHNICAL QUESTIONS 2013, PRODUCTION TECHNOLOGY SYSTEM INTERVIEW QUESTIONS WITH ANSWERS

        PRODUCTION TECHNOLOGY

1264. In arc welding, eyes need to be protected against
a. intense glare b. sparks
c. infra-red rays d. ultraviolet rays
e. infra-red and ultra-violet rays
1265. In which type of welding a pool of molten metal is used
a. electroslag b. submerged arc
c. MIG d. TIG
e. thermit welding
1266. The main criterion for selection of electrode diameter in are welding is
a. material to be welded
b. type of welding process
c. thickness of material
d. voltage used
e. current used
1267. The material used for coating the electrode is called
a. protective layer b. binder
c. slag d. deoxidiser
e. flux
1268. Which of the following welding process uses non-consumable electrode
a. LASER welding b. MIG welding
c. TIG welding d. Iron beam welding
e. Plasma welding

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1269. Following gases, are used in tungsten inert gas welding
a. hydrogen and oxygen
b. CO2 and H2
c. argon and neon
d. helium and neon
e. argon and helium
1270. Projection welding is
a. multi-spot welding process
b. continuous spot welding process
c. used to form mesh
d. used to make cantilevers
e. none of the above
1271. Grey cast iron is best welded by
a. TIG b. arc
c. MIG d. submerged arc
e. oxy-acetylene
1272. Seam welding is
a. multi-spot welding process
b. continuous spot welding process
c. used to form mesh
d. used for welding cylindrical objects
e. none of the above
1273. Upto what thickness of plate, edge preparation for welding is not required
a. 4 mm b. 6 mm
c. 8 mm d. 10 mm
e. 15 mm
1274. Preheating is essential in welding
a. high speed steel b. stainless steel
c. cast iron d. german silver
e. aluminium
1275. In thermit welding, the iron oxide and aluminium oxide are mixed in the proportion of
a. 1:1 b. 3:1
c. 1:3 d. mixture of different oxides
e. none of the above
1276. TIG welding is best suited for welding
a. mild steel b. stainless steel
c. carbon steel d. silver
e. alumimnium
1277. The advantages of electroslag welding welding are
a. ability to weld metals of great thickness in a singlepass without calling for joint preparation
b. high welding speed
c. little distortion and good stress distribution across the weld
d. protection from contamination
e. all of the above
1278. In MIG welding, helium or argon is used in order to
a. provide cooling effect
b. act as flux
c. act as shielding medium
d. facilitate welding process
e. protect electrode

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1279. Acetylene is stored in the gas cylinders
a. in gaseous form
b. in liquid form
c. in solid form
d. under high pressure
e. under low pressure
1280. In sand moulding the bottom most part of flask is called
a. cope b. cheek
c. drag d. flask bottom
e. none of the above
1281. The purpose of gate is to
a. feed the casting at a rate consistent with the rate of solidification
b. act as reservoir as for molten metal
c. help feed the casing until all solidification takes place
d. feed molten metal from pouring basin to gate
e. none of the above
1282. Honey combing/sponginess refer to
a. presence of impurities in molten metal
b. molten metal at low temperature
c. formation of a number of cacvities in close proximity in casting
d. defects due to poor heat treatment
e. surface defects produced during hot working
1283. Steel and cast iron pipes are cast by
a. die casting
b. continuous casting
c. true centrifugal casting
d. centrifuging
e. investment casting
1284. Large and heavy castings are made by
a. green sand moulding b. pit moulding
c. dry sand moulding d. pressure moulding
e. machine moulding
1285. Graphite moulds are used for continuous casting process in order to provide
a. non-wetting agent
b. self lubricating qualities
c. chilling effect
d. quick solidification of
e. machine moulding metal



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