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Chapter:

6. Which of following code is used to select x z plane in milling?

G18 G17 G10 G04

G18

G18 is used to select x z plane in milling.

Hint Answer

7. Dissolved gases may be removed from molten metal by?

Flushing or purging with inert gas Melting and pouring the metal in vacuum Flushing or purging with inert gas or Melting and pouring the metal in vacuum Melting and pouring the metal in nitrogen atmosphere

Flushing or purging with inert gas or Melting and pouring the metal in vacuum

Dissolved gases may be removed from molten metal eir by flushing or purging with inert gas or melting and pouring metal in vacuum.

Hint Answer

8. Production of pure powder of iron and copper can be effectively done using?

Atomization Reduction Crushing Electrolysis

Electrolysis

Copper is primary metal produced by electrolysis, but iron, chromium, and magnesium powders are also produced this way. Due to its associated high energy costs, electrolysis is generally limited to high-value powders such as high-conductivity copper powders.

Hint Answer

9. Which of following is used to support cavity from inside?

Chill Chaplet Sprue Core

Chaplet

Chaplet is a metal support that holds a core in place within a casting mold; molten metal solidifies around a chaplet and fuses it into finished casting.

Hint Answer

10. Which of following is an entry point through which molten metal enters mould cavity?

Gate Chaplet Chill Riser

Gate

Gating system refers to all sections through which molten metal while entering mould cavity. We pour molten metal through pouring cup, molten metal flows into this sprue, vertical passes. Then, it falls into sprue well, n it passes through runner, horizonal passes, n it passes through gate.

Hint Answer

11. The choice of pattern material depends upon:
i. On size of casting
ii. Number of casting to be made from pattern
iii. Dimensional accuracy
Which of following is correct?

(i) and (ii) (i) only (i), (ii) and (iii) (ii) and (iii)

(i), (ii) and (iii)

All statements are correct about pattern materials. The choice of pattern material depends upon on size of casting, number of casting to be made from pattern, dimensional accuracy.

Hint Answer

12. Which of following is not a type of riser?

Top riser Open riser Internal riser Bottom riser

Bottom riser

In casting process re are mainly two types of raisers are used: 1. Open riser (top riser), 2. Blind riser (side riser). Blind risers are good design features and maintain heat longer than open risers too.

Hint Answer

13. A mould has a down sprue length of 0.2 meters. The velocity of metal in meter/second at gate will be?

1.78 1.98 2.3 2.5

1.98

Velocity = \(\sqrt{(2*g*h)}\), where h is length of down sprue, and g is value of earth gravity which can be taken as 9.81.

Hint Answer

14. While calculating linear dimension of a material, shrinkage allowance is always?

Added Subtracted Multiplied Divided

Added

While calculating linear dimension of a material shrinkage allowance is always added. The allowance provided to take care of contraction of a casting is known as shrinkage allowance. During solidification of casting, volume decreases and hence contraction occurs.

Hint Answer

15. Which of following sand is black in color?

Green sand Facing sand Loam sand Backing sand

Backing sand

Backing sand is black in color due to presence of coal dust or due to burning. It contains mainly of old, used moulding sand which is black in colour due to presence of coal dust etc on contact with any hot metal.

Hint Answer

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All Chapters

View all Chapter and number of question available From each chapter from Manufacturing-engineering-I

Crystallography and Defects in Solid

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 consists of the following topics

Powder Metallurgy

NC Part Programming and Metal Casting and Gating Systems

Which of following code is used to select x z plane in milling?

Dissolved gases may be removed from molten metal by?

Production of pure powder of iron and copper can be effectively done using?

Which of following is used to support cavity from inside?

Which of following is an entry point through which molten metal enters mould cavity?

The choice of pattern material depends upon:
i. On size of casting
ii. Number of casting to be made from pattern
iii. Dimensional accuracy
Which of following is correct?

Which of following is not a type of riser?

A mould has a down sprue length of 0.2 meters. The velocity of metal in meter/second at gate will be?

While calculating linear dimension of a material, shrinkage allowance is always?

Which of following sand is black in color?

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