Competitive Exams Frequently asked Questions & Answers – Metal Casting | GATE | IOCL | IES

Competitive Exams Repeated Questions 

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The following Questions are Asked in Various Competitive Exams

Metal Casting 

1.Negative allowance is provided on the pattern to take care of

2. For the same material, powder metallurgy process is superior to casting for

3.Poor collapsibility of the mold leads to ………. type of casting defect in aluminium castings

4. The process by which shell like castings (like toys) are made is

5.Green strength in powder metallurgy refers to the strength of

6.For casting of turbine blades made of high temp and high strength alloys, the most suitable process is

7.The problem of shrinkage cavity is more likely to occur while casting ……… A ………… B………. a chill block

8.The optimum pouring time for a casting depends on several factors. One important factor among them is

9.Ceramic slurry is used in making the molds for

10. Pressure die casting deals with casting metals of relatively …………. A …………. melting point and provides …….. B………. production rate.

11. Low permeability molds and low pouring temperature of the molten metal causes ……………………. defect in castings.

12. Investment casting uses …… A……….. as pattern material and is preferred for small parts with ………. B………designs.

13.Chaplets are placed between mold in order to

14. Investment casting uses ……… (wax / resin coated sand) as pattern material and is preferred for small parts with …………….. (simple/intricate) designs

15. The primary function of a riser is to

Answers

1.Shake Allowance

2.Better control over the density of product

3.Distortion or bending type

4.Slush Casting

5.The Powder after compaction

6. Investment Casting

7.(A.) metal / plastic , (B.) with / without.

8.Fludity of the casting material

9.Shell Mold Casting

10.A. higher / lower, B. higher / lower

11. blow holes

12. A. wax / resin coated sand, B. simple / intricate

13. Prevent Core movement due to buoyancy

14. wax, intricate

15.Feed Molten metal to casting as its solidifies