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MCQs 1: What is the highest possible percentage of clay contents in loam sand?

10 20 30 50
Answer Explanation

MCQs 2: Which of the following sentences is/are correct for casting process?

Casting process is comparatively costly Objects of larges sizes cannot be produced easily by casting process The time required for the process of making casting is quite long All of the above sentences are correct
Answer Explanation

MCQs 3: The productivity of casting process is comparatively

lower than the productivity of other automatic processes like rolling higher than the productivity of other automatic processes like rolling similar to the productivity of other automatic processes like rolling unpredictable
Answer Explanation

MCQs 4: Which casting process has no size and shape limits?

Sand casting Shell-mould casting Plaster-mould casting none of the above
Answer Explanation

MCQs 5: Blow holes in casting are caused by

excessive moisture low permeability excessive fine grains all of the above
Answer Explanation

MCQs 6: Mechanical working processes are performed on metals

to achieve optimum mechanical properties in the metal to improve the mechanical strength of the metal to make metal dense all of the above
Answer Explanation

MCQs 7: Hot working process is the plastic deformation of metal which is carried out

at temperature below the recrystallisation temperature at temperature above the recrystallisation temperature at temperature equals to boiling point of water none of the above
Answer Explanation

MCQs 8: Which of the following statements are correct for plastic? 1. Plastic is a non-metallic material that can be moulded to any shape 2. Plastic is a natural or synthetic resin 3. Plastic is of organic nature composed of hydrogen, oxygen, carbon and nitrogen

only statements 1 and 2 correct, statement 3 is wrong only statements 1 and 3 correct, statement 2 is wrong only statements 2 and 3 correct, statement 1 is wrong all of above statements 1, 2 and 3 are correct
Answer Explanation

MCQs 9: The plastics which soften when heat is applied with or without pressure, but requires cooling to set them to shape are called as

thermosofting materials thermosetting materials thermoplastic materials thermostatting materials
Answer Explanation

MCQs 10: In resistance electric welding, the current passed through two joining metal pieces is

230 to 440 volts, at a high amperage 230 to 440 volts, at a low amperage 2 to 8 volts, at a high amperage 2 to 8 volts, at a low amperage
Answer Explanation

MCQs 11: As compared to the arc welding, the gas welding takes

considerably less time for the metal to heat up considerably more time for the metal to heat up approximately same time for the metal to heat up as arc welding unpredictable
Answer Explanation

MCQs 12: Good surface finish and better dimensional accuracy can be achieved in

cold working process hot working process both a. and b. none of the above
Answer Explanation

MCQs 13: Which of the following are the cold working processes? (1) Forging (2) Bending (3) Squeezing (4) Pipe Welding (5) Drawing

(1), (2) and (3) (2), (3) and (5) (2), (4) and (5) (1), (2), (3) and (5)
Answer Explanation

MCQs 14: The process of joining two pieces of metal with a different fusible metal applied in a molten state is called as

welding soldering both a. and b. none of the above
Answer Explanation

MCQs 15: Which of the following statements is/are true for welding process?

General welding equipments are very costly Welding results in residual stresses and distortion of workpiece Two dissimilar metals cannot be joined by welding All of the above
Answer Explanation

MCQs 16: Thermosetting materials are

the plastics which can be softened even after they have set and hardened the plastics which require heat and pressure to mould them into shape both a. and b. none of the above
Answer Explanation

MCQs 17: Which plastic materials contain strong cross linkings in their molecular structure?

Thermoplastic materials Thermosetting materials Both a. and b. None of the above
Answer Explanation

MCQs 18: Worm working or semi-hot working process, which is the plastic deformation of metal or alloy under conditions of temperature and strain rate, is performed to eliminate drawbacks of

cold working process hot working process both cold and hot working processes none of the above
Answer Explanation

MCQs 19: The volume of metal that enters the rolling stand

should increase after rolling process should decrease after rolling process should remain same after rolling process unpredictable
Answer Explanation

MCQs 20: The metal joined is never brought to a molten stage in

pressure welding fusion welding thermit welding none of the above
Answer Explanation

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