Final) Exam's-Form With Pics

8/8/2019 Final) Exam's-Form With Pics

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1.Question:

Pure metals have a freezing range that approaches zero. This statement is:

True

False

2.Question:Ferrous castings generally have narrow mushy zones. This statement is:

True

False

3.Question:

The arrow annotated as A points to:

Sprue

Riser

Runner

GatePouring basin

4.Question:

A high surface tension of the liquid metal will:Reduce fluidity

Increase fluidityHas no effect on fluidity.

5.Question:

Thin casting sections during casting may have:

Premature solidification.Mature solidification.

Immature solidification.


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6.Question:

Rail road rails are made from:

Slabs.Blooms

Plates.Sheets.

Billets.

7.Question:

Assuming the same volume:Molten metal in a cube-shaped mold will solidify faster than in a spherical mold.

Molten metal in a spherical mold will solidify faster than in a cube-shaped mold.

Molten metal in a spherical mold will solidify the same time as in a cube-shaped

mold.

8.Question:

Which statement is correct?

Carbon steel and gray iron contract upon solidification.Carbon steel and gray iron expand upon solidification.

Carbon steel contracts while gray iron expands upon solidification.Carbon steel expands while gray iron contracts upon solidification.

9.Question:

Respectively, the top and bottom casting defects are:

Misrun and cold shut.

Cold shut and misrun.

Blow and misrun.

Blow and cold shut.Scab and scar.


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Scar and scab.

10.Question:

The annotation "A" in this casting refers to:

Chill

ChapletWedge

Insert

Support.

11.Question:

A typical mixture of the sand used in sand casting is:

90% sand, 3% water, 7% clay.

90% sand, 3% clay, 7% water.

90% clay, 3% water, 7% sand.

90% sand, 3% water, 6% clay, 1% binding organic resins.

12.Question:

The annotation A in the picture refers to:

The cope

The drag


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The Vent

The Sprue

The riser.

13.Question:

Molds in sand casting can be reused:True

False.

14.Question:

Sand can be reused in sand castingTrue

Flase

Dont know

15.Question:

Gear housing mostly made by:

Shell moldingInvestment casting.

Ceramic mold casting.

Polystyrene process.

16.Question:

In shell molding:

We need a new pattern for each mold.

We need a new mold for each part.We dont need patterns at all.

17.Question:

The major advantage of vacuum molding is:Easy recovery of the sand.

Little clay is needed.

Excellent dimensional accuracy.Wood patterns are used in making the mold.

18.Question:

In lost- foam process:The patterns are made from polystyrene

The parts are made from polystyrene.

The mold is made from polystyreneBoth the mold and the patterns are made from polystyrene.

19.Question:

In lost- foam process

The pattern has to be removed from the mold.

The part has to be removed without destroying the mold.


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The mold has to be damaged to remove the part.

The mold is permanent and can be used again.

20.Question:In lost wax process:

The mold is made from wax.The produced parts are made from wax.

The pattern is made from wax.

The cores are made from wax.

21.Question:

Which statement is true?

Products made by sand casting are better in surface finish than those made by lost

foam process.Products made by lost wax have close dimensions as compared to shell molding.Products made by vacuum molding are larger in size than those by sand casting.

Lost wax is suitable for large size castings.

22.Question:

Permanent mold casting will have:Permanent pattern.

Permanent mold.Permanent machines

Permanent size.

Permanent production rate.

23.Question:

The major limitation of the permanent mold casting is:

The high cost of the pattern.The high cost of the mold.

The high cost of the machinery used.

The high cost of production.The high cost of machines setup.

24.Question:

Automotive pistons are typically made by:Sand casting.

Vacuum casting.

Ceramic mold casting.Permanent mold casting.

Machining.

25.Question:


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The process shown represents:

Permanent vacuum casting.Permanent hot chamber castingPermanent cold chamber casting.

Injection molding.

26.Question:

The annotation arrows A, B, C, G in this picture refers to:

Cavity, Ejector pins, Movable die ha lf, Plunger.


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Cavity, Ejector pins, Movable die half, Fixed die half.

Cavity, Guide pins, Movable die half, Plunger.

Cavity, Guide pins, Movable die half, Hammer.

Cavity, Ejector pins, Fixed die half, Hammer.Cavity, Pressure pins, Fixed die half, Hammer.

Cavity, Pressure pins, Fixed die half, Plunger.Cavity, Supply pins, Fixed die half, Plunger.

27.Question:

Parts with round outer peripheral shapes and hexagonal internal shapes can be

produced in true centrifugal casting. This statement is:

True

False

28.Question:

In true centrifugal process, increasing the amount of molten metal will:

Decrease the outer diameter of the casting.

Decrease the inner diameter of the casting.

Increase the outer diameter of the casting.Increase the inner diameter of the casting.

29.Question:

Which statement is correct?

More than a single part can be produced in semi-centrifugal casting.Centrifuge casting is limited to round shaped products.

Semi-centrifugal process is suitable for making rail road wheels.Pipes with inner hexagonal shapes can be produced using centrifugal process.

30.Question:

Czochralski process is a:

Bulk metal deformation process.Machining process.

Forging process.Rolling process.

Single crystal casting process.

31.Question:

Which statement is true?Sand cast products are limited in size.

Lost wax products are limited in shape.

Semi-centrifugal products are limited in shape and size.

Sand casting is limited by high cost.

32.Question:


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The correct ascending order of the following processes (sand casting, shell

molding, investment molding) according to the best surface finish is:

Investment casting, shell molding, sand casting.Investment casting, sand casting, shell molding.

Shell molding, sand casting, investment casting.Sand casting, shell molding, investment casting.

33.Question:

The initial thickness of a plate is 10cm. The total draft after one pass rolling is2cm. Then the true strain is:

0.18

0.221.251.2

34.Question:

The required roll diameter to get a draft of 2 cm with a friction coefficient of 0.2is:

10cm50cm

100cm

200cm

35.Question:

In rolling, small rolls will:Increase the roll force.

Reduce the roll force.

Decrease the bending in rolls.Increase the coefficient of friction.

36.Question:

In rolling, one of the following is correct.The rolled strip tends to be thicker at its edges than at its center.

The rolled strip tends to be thicker at its center than at its edges.

The rolled strip tends to be wavy at the center more than the edges.The rolled strip tends to be wavy at both the edges and the center.

37.Question:

In rolling, flattened rolls will:

Decrease the roll forces.

Increase the flatness of the produced product.


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Decrease the flatness of the produced product.

Reduce bending in the rolls.

38.Question:In rolling of plates and sheets with high width-to- thickness ratio pre-shapes:

The widthof the strip remains effectively constant during rolling.The widthof the strip will significantly increase during rolling.The widthof the strip will significantly decrease during rolling.

39.Question:

In rolling, spreading will increase in case of:Increasing width-to-thickness ratio ofthe entering strip.Increasing friction, and

Increasing ratio of the roll radius to the strip thickness.

Using rolls with vertical axes.

40.Question:

In rolling, chatter can be reduced by:

Decreasing the strip width.Increasing the reduction-per-pass (draft).

Decreasing the roll radius.Decreasing the strip-roll friction.

Incorporating dampers in the roll supports.

41.Question:

Based on the shown grain structure, the production process used is

Cold rolling.Hot rolling.

Hot swaging.Roll forging.

42.Question:Pack rolling is useful for:

Increasing the production rate.Adding nice mate surface finish.


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Avoiding cracks.

Producing thicker double layer foils.

43.Question:Generally, residual stress in rolling are observed in:

Hot rolling.Hot roll forging.

Cold rolling.

Hot forge rolling.

44.Question:In sheet metals, the gage number increases by:

Increasing the thickness of the sheet.

Decreasing the thickness of the sheet.

Increasing the width of the sheet.Decreasing the width of the sheet.

45.Question:

Rail road rails are made by:

Roll forging

Impression forgingShape rolling.

Die molding.

46.Question:

Knives can be made by:Impressio n forging.

Flat rolling.Roll forging.

Lost wax casting.

47.Question:

Screws are made by:Skew rolling.

ForgingThread rolling.

Impression forging.

48.Question:


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"A B C" respectively, refer to threads made by:

Machining, rolling, casting.Casting, rolling, machining.

Rolling, casting, machining.Casting, machining, rolling.

49.Question:

Crank shafts are made by:Forging.

Casting.Machining.

Rolling.

Die casting.

50.Question:

Horse shoe is made by:Closed die forging.

Impression forging.

Roll forging to get the U shape.Blacksmiths.

Machining.

51.Question:

In forging, pancaking refers to:

Pan making.

Cake making.Pancake making.

Barreling.Barrel making.


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52.Question:

Cogging is a:

Rolling process.Machining process.

Permanent mold process.Forging process.

Die casting process.

53.Question:

The main advantage of draft angles in dies is:To simplify the flow of the material in the mold cavities.

To simplify the removal of the part out of the mold.

To avoid barreling due to friction.

To avoid thermal shocks and cracks.

54.Question:

The advantage of gutters in forging dies is:To allow for flash formation.

To take any excess martial.

To compensate for any shrinkage in the material.To increase the fluidity of the metal.

55.Question:

Automobile connecting rods are made by:Rolling.

Shape rolling.Open die forging.

Impression die forging.

56.Question:

In forging:

External draft angles should be larger than internal draft angles.Internal draft angles should be larger than external draft angles.

Draft angles should be equal no matter what the part shape is.No draft angles are needed since forging is a cold forming process.

57.Question:

Automobile disk brakes are made by:

Sand casting

Centrifuge casting.

Permanent die casting

Lost wax casting.


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58.Question:

The shown brake drum is possibly made by:

RollingForging

Casting

Machining.

59.Question:

Jewels can be made by:Shell mold casting.

Permanent casting.

Investment casting.Open die forging.

Roll forging.

60.Question:

Cold rolled products have better surface finish and higher strength than hot rolledproducts. This statement is:

True.False.

61.Question:

All of listed below is correct except:

Cold rolled sheets will have anisotropic properties.

Machined threads are weaker than rolled ones.

Sand cast products have a poor surface finish.

Large rolls will decrease the rolling forces.

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Final) Exam's-Form With Pics