Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Materials And Processing For NDT > 8 The Casting Process > Flashcards

8 The Casting Process Flashcards

1
Q

NDT method used for service examination of castings

A

Penetrant PT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Testing methods that may be needed to detect internal defect’s regardless of the material or type of casting

A

Radiographic RT

Ultrasonic testing UT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

The rough surfaces of any casting also can produce problems in this ultrasonic device

A

Transducer coupling

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

This method is used extensively in the examination of critical coolant passages in turbine engine blades to measure thickness

A

Ultrasonic UT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Methods used to detect leading and trailing edge cracks before and during service of turbine blades

A

Eddy current ET

Penetrant PT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The first step in the casting process is to create this which represents the finished product

A

Pattern

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

The pattern may have attachments or grooves in the mold to serve as channels for flow of material into the cavity these are called

A

Runners

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

In some casting processes this is made to flow into close contact with the pattern and that has sufficient strength to maintain that position

A

Mold

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

An opening to the outside of the mold is called

A

Spruce

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Pinetree shaped structures in solidification seals a small pockets of liquid to freeze later

A

Dendrites

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Large grains in castings cause diffraction effect with which method

A

Radiografic RT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

In castings reflection from grain boundaries cause problems with this method

A

Ultrasonic UT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Low melting or fusing alloys are known as

A

Eutectic Alloys

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Some of the most important problems connected with the casting process are those of

A

Shrinkage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

The freezing of a liquid from the outside toward the center

A

Progressive solidification

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

The freezing from one part of a casting to another, such as from one end to the other end is known as

A

Directional solidification

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

The point where metal is poured into the mold is known as

A

Feed head

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

In casting, the highest temperature areas immediately after pouring are called

A

Hot Spots

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

In a casting isolated sections that freeze early, that may disturb good directional solidification result in

A

Shrinks, porosity, cracks, ruptures, or warping

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Usually located at points of greatest sectional dimension in castings

A

Hot spots

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Used to pour and transport hot molten metal from the melting equipment to the molds

A

Ladle

22
Q

Drops of splashing metal lose heat, freeze, and are then entrapped as globules that cannot join completely with the metal which freezes later and are held partially by mechanical bond

A

Cold shots

23
Q

Thin sections that cool to rapidly in contact with the mold walls may freeze off before the metal travels it’s complete path, or metal flowing in one direction may solidify and then be met by metal flowing through another path to form a defect known as a

A

Cold shut

24
Q

Metal is fed into the cavity that shapes the casting through a system consisting of pouring basins, a down spruce, runners, and ingates

A

Gating system

25
Q

Used to replace the contraction of solidification and to promote good directional solidification

A

Risers

26
Q

Heat absorbing devices inserted in the mold near the cavity to help and directional solidification

A

Chills

27
Q

Fast cooling during and after solidification retards grain growth and thus produces a harder, stronger structure using these

A

Chills

28
Q

The bottom part of the flask is called

A

Drag

29
Q

The upper part of the flask is known as

A

Cope

30
Q

A mixture of sand, clay, and moisture is

A

Green sand

31
Q

Used to facilitate the removal from the mold medium

A

Draft angles

32
Q

Where the largest two dimensions are in a single plane is this kind of pattern

A

Flat back

33
Q

Require separation along two or more planes for removal of the pattern to produce the casting cavity

A

Irregular parting

34
Q

Open face containers that hold the molten medium as it is packed around the pattern.

A

Flasks

35
Q

Snap, pop off, and slip are all types of these

A

Flasks

36
Q

When molds are constructed with removable flasks these are placed over them to maintain alignment during pouring

A

Jackets

37
Q

Bodies of mold material, usually in the form of inserts that exclude metal flow to form internal surfaces in a casting

A

Cores

38
Q

When a substantial portion of a core is enclosed in a casting, this method is frequently used to determine whether or not the core shifted during casting, or to be certain that all the core material has been successfully removed after casting

A

Radiography RT

39
Q

Very large or long slender cores that might give way under pressure of the flowing metal or sometimes give additional support by the use of

A

Chaplets

40
Q

This method used to examine the finished casting can reveal discontinuities surrounding chaplet regions and indicate whether the chaplet completely fused with the base metal

A

Radiography RT

41
Q

With the mold open, the inside surfaces are subjected to heat from torches, radiant lamps, hot dry air, or electric heating elements to form a dry insulation around the mold cavity this is known as

A

Skin Drying

42
Q

A mold made by covering the heated metal pattern with sand that it’s mixed with small particles of a thermosetting plastic

A

Shell Mold

43
Q

Mold casting that is used mostly for the shaping of aluminum, copper, magnesium, and zinc alloys

A

Permanent mold casting

44
Q

Mold casting when pressure is applied to the liquid metal to cause it to flow rapidly and uniformly into the cavity of the mold, or die

A

Die Casting

45
Q

Investment casting is also known as

A

Lost wax casting

46
Q

Investment castings of high-strength alloy turbine buckets for gas turbines require NDT methods of

A

Radiographic RT and penetrant PT

47
Q

Casting procedure makes use of the rotating mold to develop forces acting on the metal to improve its density towards the outside of the mold

A

Centrifugal Casting

48
Q

Method used to produce cast bar

A

Continuous casting

49
Q

This melting equipment is charged through a door above the melting zone with layers of coke, iron, and limestone and maybe operated continuously by taking off melted iron is it accumulates in the well at the bottom

A

Cupola

50
Q

Fractured forming in metal during solidification resulting from restrained contraction is called

A

Hot tear

Materials And Processing For NDT (17 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions