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You need to login to ask any Questions from chapter powder-metallurgy-nc-part-programming-and-metal-casting-and-gating-systems of Manufacturing-engineering-I

Chapter:

powder-metallurgy-nc-part-programming-and-metal-casting-and-gating-systems

1. Which of following code is used to cancel offset compensation for cutter radius?

G40 G02 G42 G00

G40

G40 is used to cancel offset compensation for cutter radius.

Hint Answer

2. Which of following term can be used to describe flask?

Drag Cope Check Chill

Chill

Drag is situated at lower molding flask, cope is situated at upper molding flask, check is situated at intermediate molding flask.

Hint Answer

3. Which of following code will give circular interpolation in Counterclockwise direction?

G00 G56 G69 G03

G03

G03 will give circular interpolation in Counterclockwise direction.

Hint Answer

4. Which of following code is used in programming in incremental coordinates?

G90 G91 G92 G94

G91

G91 is used in programming in incremental coordinates.

Hint Answer

5. Which of following code is used in programming in absolute coordinates?

G90 G32 G92 G01

G90

G90 is used in programming in absolute coordinates.

Hint Answer

6. If velocity of metal flow at gate is 4m/sec, volume of mould is .1 cubic meters and cross-sectional area of gate is 0.002 cubic meters n time required to fill up mould in seconds is?

10 12 12.5 15.5

12.5

t = [v/ (a*V)], where v is volume, V is velocity, a is area and t is time taken to fill mould.

Hint Answer

7. What is function of cores used in casting?

To remove dissolved gases To avoid defects To form hollow region To reduce shrinkage porosity

To form hollow region

Cores form internal cavities inside structure which will n leads to final casting shape with hollow structure. Sand inside cores and pattern gives strength and rigidity to casting structure.

Hint Answer

8. For good dimensional tolerances and smooth surface which of following is used as pattern material?

Wood Plastics Metals Ceramics

Metals

The primary benefits of using ceramic patterns are as follows: 1. It is a reusable pattern, 2. close dimensional accuracy, 3. excellent surface finish. There are two types of ceramic mold casting known as ?unicast process? and ?shaw process?.

Hint Answer

9. Complex shape can be formed effectively using?

Powder metallurgy Turning Sand casting Metal casting

Powder metallurgy

Powder metallurgy allows us to create high-quality components, while near-net-shape dimensional control provides a high degree of control over manufacturing process, facilitating production of complex shapes.

Hint Answer

10. Doubling time in flat mould will increase thickness of wall skin by what percentage?

31.6% 41% 73% 22%

41%

Thickness is proportional to ? time. When time is doubled in flat mould, thickness of wall skin will increase by 41%.

Hint Answer

Nexttt

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Crystallography and Defects in Solid

Mechanical Properties and Testing and Phase Diagram

Mechanical Properties and Testing and Phase Diagram

Ferrous Metal, Non-Ferrous Metal and Heat Treatment

Ferrous Metal, Non-Ferrous Metal and Heat Treatment

Magnetic Properties of Material, Electrical Properties of Materials, Plastics, Ceramics and Composites

Magnetic Properties of Material, Electrical Properties of Materials, Plastics, Ceramics and Composites

Metal Cutting

Cutting-Tool Materials and Cutting Fluids

Cutting-Tool Materials and Cutting Fluids

Lathe Machines, Shaping and Slotting

Lathe Machines, Shaping and Slotting

Milling, Drilling and Reaming

Milling, Drilling and Reaming

Grinding, Surface Finishing Operations and Unconventional Machining Processes

Grinding, Surface Finishing Operations and Unconventional Machining Processes

Metrology, Welding, Fusion-Welding Processes and Unconventional Welding Methods

Metrology, Welding, Fusion-Welding Processes and Unconventional Welding Methods

Powder Metallurgy, NC Part Programming and Metal Casting and Gating Systems

Powder Metallurgy, NC Part Programming and Metal Casting and Gating Systems

Forming, Metal Forming Processes and Heat Transfer

Forming, Metal Forming Processes and Heat Transfer

Jigs and Fixture, Applications and Gears

Jigs and Fixture, Applications and Gears

Topics

This Chapter powder-metallurgy-nc-part-programming-and-metal-casting-and-gating-systems consists of the following topics

Powder Metallurgy

NC Part Programming and Metal Casting and Gating Systems

Which of following code is used to cancel offset compensation for cutter radius?

Which of following term can be used to describe flask?

Which of following code will give circular interpolation in Counterclockwise direction?

Which of following code is used in programming in incremental coordinates?

Which of following code is used in programming in absolute coordinates?

If velocity of metal flow at gate is 4m/sec, volume of mould is .1 cubic meters and cross-sectional area of gate is 0.002 cubic meters n time required to fill up mould in seconds is?

What is function of cores used in casting?

For good dimensional tolerances and smooth surface which of following is used as pattern material?

Complex shape can be formed effectively using?

Doubling time in flat mould will increase thickness of wall skin by what percentage?

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