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00:00कि नमस्कर दोस्तो मेटलर्जी की यूएन अमें आपका स्वागत हैं दोस्तो आप अगर इस चैनल में नाए है तो चैनल
00:05को सब्सक्राइब कर दीजिए और सतो सथ बेल आइकॉन को भी दभा दीजिए और दोस्तो अपना फ्रेंड या यार के
00:12साथ जरूर शेयर करें ताकि वी
00:16। दोस्तो आज इस वीडियो में
00:18। फांडरिट टेक्नोलोजी का
00:2050 कोस्चन डिसकास करने वाले हैं
00:22और दोस्तो टाइम उस ना करते हुए
00:24चलिए वीडियो को शुरू करते हैं
00:29तो दोस्तो आज का
00:30पहला कोस्चन है
00:31Molden metal after solidifying in a
00:34mold
00:35passes different desk
00:38properties
00:39Metallurgical, Mechanical या both
00:42A and B या नाइदर A nor B
00:45सही अंसर है option C
00:47Both Metallurgical and Mechanical
00:53क्या बहर है
00:54Molten metal after solidifying
00:56in a mold
00:58possess different
01:00Metallurgical and Mechanical
01:02properties
01:04Next दोस्तो
01:05The bottom
01:08most part of plugs
01:10in sand molding
01:11is called
01:12cop, drag, cheek
01:14या नान अब देज
01:15सही अंसर है
01:16Option B
01:17Drag
01:18The bottom
01:19most part of plugs
01:22in sand molding
01:24is called
01:25Drag
01:25Next दोस्तो
01:27The Metallurgical structure
01:30and Mechanical
01:31properties
01:32of a molten metal
01:33or alloy
01:34on solidification
01:35in mold
01:36does not depend on
01:38its chemical composition
01:40its cooling rate
01:42type of casting process
01:44या नान अब देज
01:47Say और अब देज
01:49option D
01:49None of देज
01:50The Metallurgical structure
01:52and Chemical properties
01:53of a molten metal
01:55or alloy
01:55on solidification
01:57in mold
01:58does not depend on
01:59its chemical properties
02:00its cooling rate
02:02type of casting process
02:04या दी नान अब देज
02:05सही अंसर है
02:06Option D
02:08Next दोस्तो
02:10The pattern shrinkage
02:12allowance to be used
02:14for grey cast iron
02:16is 10 mm
02:19per meter
02:20सही अंसर है
02:21Option B
02:226.9 to 10.4 mm
02:26per meter
02:27The pattern shrinkage
02:29allowance to be used
02:30for grey cast iron
02:32is 6.9 to 10.4 mm
02:37per meter
02:39Next
02:43The middle portion of flux
02:45in sand molding
02:47is called
02:47Cheek, Draug, Coop
02:50या नान अब देज
02:51सही अंसर है
02:52Option A
02:53Cheek
02:53The middle portion of flux
02:56in sand molding
02:58is called
02:59Cheek
03:00Next
03:03Venting of molds
03:04is done
03:05to permit the
03:07escape of gases
03:09generated in the mold cavity
03:12when the molten metal
03:14is poor
03:15mold gases are generated
03:17because of the
03:19evolution of free and combined water
03:22expansion of air
03:24expansion of air
03:24expansion of air
03:25is present in the
03:25pore
03:26space of
03:27ramped sand
03:28or decomposition of
03:31binders and additives
03:34or the all of above
03:35Cheek, Draug, Coop
03:36and Coop
03:36Option D
03:37all of above
03:39Venting of mold
03:41is done
03:42to permit the
03:43escape of gases
03:44generated in the mold cavity
03:47when the molten metal
03:49when the molten metal is poor
03:49mold gases are generated
03:51because of the
03:52evolution of free and combined water
03:55expansion of air
03:57present in the
03:58pore space of
04:00ramped sand
04:00and the decomposition of
04:05binders and additives
04:07hence are option D
04:09all of above
04:12next
04:13the size of tolerance
04:15for gray cast iron
04:16casting
04:19weighting more than 0.5 ton
04:22is about 10 mm
04:23say hence are option A
04:261.6 mm
04:27the size tolerance for
04:30gray cast iron casting
04:31weighting more than 0.5 ton
04:34is about
04:341.6 mm
04:37next
04:38the topmost part
04:41in
04:43sand molding
04:45is called
04:46the
04:46Draug, Cheek, Coop
04:48or Nanobdage
04:49sahian sare option C
04:51Coop
04:52the topmost part
04:54in sand molding
04:55is called
04:56Coop
04:57next
04:59failure
05:00to permit
05:01escape of mold gases
05:04result in the
05:06defective casting
05:08defective casting
05:09due to its
05:10tapping in
05:12the metal
05:14back pressure
05:17build up which
05:19resists the inflow
05:21of molten metal
05:22and rustling
05:24and bursting of mold
05:25and D
05:25all of above
05:26say hence are
05:27option D
05:28all of above
05:29failure to permit
05:31escape to mold gases
05:33result in the
05:34defective casting
05:36due to its
05:37trapping in the mold
05:38back pressure
05:40build up which
05:41resists the
05:42inflow of molten metal
05:44and bursting of mold
05:46option D
05:47next
05:51coops are used to
05:53strengthening
05:54molding sand
05:55support loose
05:57piece
05:57make desire
05:59resists
06:00in casting
06:01or D
06:02all of above
06:03say answer
06:04option C
06:05make desire
06:07resists in casting
06:10course are used to
06:11make desire
06:12resists in casting
06:16next
06:16next
06:17dosdo
06:17wax pattern
06:19is used in the
06:20investment casting
06:22cell molding
06:23die casting
06:24or none of that
06:25say answer
06:26option A
06:27investment casting
06:28wax pattern
06:30is used in the
06:31investment casting
06:33next
06:36draft
06:37on
06:38pattern
06:38for casting
06:40is
06:41identification
06:43number
06:45imposed
06:46on it
06:47shrinkage
06:48allowance
06:48taper
06:49to facilitate
06:50its removal
06:51from mold
06:52or D
06:53none of that
06:54say answer
06:55option C
06:55taper
06:57to facilitate
06:58its removal
06:59from mold
07:00draft
07:01on pattern
07:01for casting
07:02is
07:03taper
07:03to facilitate
07:04its removal
07:06from mold
07:08next
07:09dosdo
07:10all the
07:12impurities
07:12in true
07:13centrifugal
07:14casting
07:14are collected
07:15at
07:16dash
07:16surface
07:17of the
07:17casting
07:18in between
07:20the outer
07:20and inner
07:21at
07:23the outer
07:23at the
07:24inner
07:25none of
07:25these
07:26say answer
07:27have
07:27option C
07:28at
07:29the inner
07:31all the
07:32impurities
07:32in true
07:33centrifugal
07:34casting
07:35are collected
07:36at the
07:37inner
07:38surface
07:38of the
07:39casting
07:40next
07:41next
07:41dosdo
07:45wood
07:46for
07:47pattern
07:47is
07:48considered
07:48dry
07:49when
07:50its
07:50moisture
07:51content
07:51is
07:5210%
07:530
07:541.5
07:55less than
07:5615
07:57less than
07:585
07:59say
08:00answer
08:00have
08:01option
08:01C
08:02less than
08:0215%
08:04wood
08:06for
08:06pattern
08:07is
08:07considered
08:08dry
08:09when
08:10its
08:10moisture
08:10content
08:11is
08:11less
08:12than
08:1215%
08:14next
08:16which
08:18is
08:19the
08:19most
08:19which
08:20is
08:20the
08:20best
08:21molding
08:21process
08:22for
08:22production
08:23of
08:24large
08:24intricate
08:27casting
08:28weighting
08:29greater
08:30than
08:30100
08:31tons
08:31peat
08:32molding
08:33ceramic
08:34molding
08:35greens
08:35molding
08:36or
08:37cement
08:37molding
08:38say
08:39answer
08:39have
08:39option
08:40M
08:41peat
08:41molding
08:42which
08:43is
08:43the
08:43best
08:44molding
08:44process
08:45for
08:45production
08:45of
08:46large
08:47intricate
08:47casting
08:48weighting
08:49greater
08:49than
08:50100
08:50ton
08:51say
08:51answer
08:52hai
08:52peat
08:53molding
08:55next
08:56loose
08:57piece
08:57pattern
08:57are
08:58a
08:58type
08:59of
08:59splite
09:00pattern
09:00similar
09:01to
09:02core
09:02pattern
09:02used
09:03when
09:04the
09:04pattern
09:05cannot
09:05be
09:06drawn
09:06from
09:07the
09:07mold
09:07ya
09:08denun
09:09of
09:09that
09:09say
09:10answer
09:10hai
09:10option
09:11C
09:12used
09:13when
09:13the
09:14pattern
09:14cannot
09:15be
09:15drawn
09:15from
09:16the
09:16mold
09:16loose
09:17piece
09:17pattern
09:18are
09:18used
09:19when
09:19the
09:19pattern
09:20cannot
09:21be
09:21drawn
09:21from
09:22the
09:23mold
09:23next
09:25main
09:27function
09:28of
09:28a
09:28riser
09:29is
09:30to
09:30permit
09:31escape
09:32of
09:32a
09:32hot
09:33gases
09:34feed
09:35the
09:35metal
09:36to
09:36the
09:36casting
09:36as
09:37it
09:38shrinks
09:38during
09:39solidification
09:51next
09:52shrinkage
09:52the
09:52metal
09:53to
09:53the
09:53casting
09:54as
09:54it
09:55shrinks
09:55during
09:56solidification
09:57main
09:58function
09:58of
09:59erasure
09:59is
10:00to
10:00feed
10:01the
10:01metal
10:01to
10:01the
10:02casting
10:02as
10:03it
10:03shrinks
10:04during
10:04solidification
10:05next
10:07shrinkage
10:09allowance
10:09is
10:09made
10:10by
10:10subtracting
10:12from
10:12external
10:13and
10:13internal
10:14dimension
10:15adding
10:16to
10:16external
10:17and
10:18internal
10:18dimension
10:19adding
10:20to
10:21external
10:22dimension
10:22and
10:23subtracting
10:24from
10:24internal
10:25dimension
10:26and
10:26update
10:27say
10:27answer
10:28option
10:28c
10:29adding
10:31to
10:31external
10:31dimensions
10:32and
10:33subtracting
10:33from
10:34internal
10:34dimension. Shrinkage allowance is made by adding to external dimension and subtracting from
10:42internal dimension. Next, large floor and feet mold are packed with sand by the help of jolt
10:53machine, sand slinger, simple squeezer or jolt squeezer. So, the answer is option B.
11:02Sand slinger. Large floor and feet mold are packed with sand by the help of sand slinger.
11:13Next, the function of gate is to feed molten metal from pouring basin to gate. Act as a reservoir of
11:24molten metal and feed the casting at a rate consistent with the rate of solidification and
11:31none of them. Shrinkage allowance is option C. Feed the casting at a rate consistent with the rate of
11:38solidification. The function of gate is to feed the casting at a rate consistent with the rate of
11:46solidification. Next, riddle is used to scoop sand deep in the mold. A round sieve used to make
12:00ironifier corner in a mold. A round sieve. Next, lifter is used to scoop sand deep in the mold. A
12:22round sieve. A long flat metal fitted with an offset handle.
12:27A round sieve. A round sieve. is used to scoop sand deep in the mold. A round sieve. A round
12:44sieve. Shae of shaar ai Ưu kehiyan saar ai opshen A. Use to scoop sand deep in mold. A lipter
12:57Both runner and ingot in the cup
13:00Ya runner in the cup and ingot in drag
13:05Ya none of them
13:06So the answer is option C
13:09Runner in the cup and the ingot in drag
13:14The position of the runner and ingot for ferrous metal should be as follows
13:20Runner in the cup and ingot in drag
13:24Next
13:27Purpose of riser is to help feed the casting until all solidification take place
13:34Act as a reservoir for molten metal
13:37Ya feed molten metal from powering basin to get a none of these
13:43So he answer here
13:44Option A
13:46Help feed the casting until all solidification take place
13:51Purpose of riser is to help feed the casting until a solidification take place
13:59Next
14:01Plastic goods are usually produced by the dust molding
14:06Cell molding, injection molding, dry sand ya pit molding
14:10So he answer is option B, injection molding
14:14Plastic goods are usually produced by injection molding
14:19Next
14:22Coors in a centrifugal casting are made of cast iron, steel, hard sand ya none of these
14:31So he answer is option D, none of these
14:34Coors in a centrifugal casting are made of none of these
14:41Next
14:41Next
14:42Next
14:43Next
14:44Slick is used to make or repair corners in a mold
14:50A round sieve used to scoop and dip in the mold ya none of these
14:56So he answer is option A
15:06So he answer is option A
15:09A long flat metal plate fitted with an offset handle ya a round sieve ya used to make or repair
15:18corners in a mold ya none of these
15:20So he answer is option A
15:23So he answer is option A
15:24A long flat metal plate fitted with an offset handle
15:28Trouble is a long flat metal plate fitted in an offset handle
15:35Next
15:36Next
15:38According to Shiverinoff's rules
15:42Metal solidification time is proportional to
15:49B square by A square
16:07Next
16:08Next
16:09Function of sprue is to feed molten metal from pouring basin to gate
16:16A square
16:16Next
16:16Accuracy of cell molding is of the order of dash mm per mm
16:16Act as a reservoir of molten metal ya feed the casting at a rate complicable with the rate
16:24of solidification ya none of these
16:27So he answer is option A
16:29Function of sprue is to feed molten metal from pouring basin to gate
16:37Next
16:40Accuracy of cell molding is of the order of dash mm per mm
16:45So he answer is option A
16:47Option A
16:480.003 to 0.005 mm per mm
16:52Accuracy of cell molding is of the order of 0.003 to 0.005 mm
17:00Next
17:02Next
17:03Freezing ratio or relative freezing time which is used in
17:10Chance equation is given by
17:16V2 by V1 by A1
17:25Option A
17:27Forcing ratio or relative freezing time which is used in chance equation is given by
17:33V2 by V1, V2 by A2 by V1 by A1
17:40Option A
17:42Next
17:43Next
17:44The function of pouring basin is to feed the molten metal from pouring basin to gate
17:52Act as a reservoir for molten metal
17:55Feed the casting at a rate compatible with the rate of solidification ya none of these
18:04So he answer is option B
18:05Act as a reservoir for molten metal
18:09The function of pouring basin is to act as a reservoir for molten metal
18:15Next
18:19Volumetric shrinkage of grey cast iron is about
18:23So he answer is option D
18:251.9% to negative
18:28Volumetric shrinkage of grey cast iron is about 6 to 8.5%
18:333.5 to 4.5%
18:362.5 to 3%
18:371.9 to negative
18:39So he answer is option D
18:411.9% to negative
18:46Next
18:47Next
18:49And such process is a continuous casting process process of making porous mold
18:56Ya both A and B and neither A nor B
18:59So he answer is option B
19:02Process of making porous mold
19:06And such process is a process of making porous mold
19:12Next
19:15Next
19:16The internal hot tear defect is casting can be revealed by the dash inspection
19:25Dimensional, radiographic, visual ya none of dash
19:31Next
19:33The internal hot tear defect in casting can be revealed by the radiographic infection
19:44Next
19:54Next
19:55Next
19:55Next
19:55Next
19:59Next
19:59Next
19:59Which are made by difficulty using complex pattern in sand mold casting ya mass production ya
20:07D none of dash
20:08So he answer hai
20:10Option A
20:12Shaps which are very complex and intricate and can be cast by any other method
20:27Next
20:30Next
20:31Next
20:31Next
20:32Next
20:33Next
20:34Next
20:36C instinct
20:37Next
21:01Stat
21:03Next, semi-centrifugal casting is used to ensure purity and density at extremities of a casting, cut symmetrical object, a
21:16often high density and purity castings and none of them.
21:19So, the answer is option M. Ensure purity and density at extremities of a casting. Semi-centrifugal casting is used
21:29to ensure purity and density at extremities of a casting.
21:34Next, true-centrifugal casting is used to obtain high density and purity casting. Ensure purity and density at extremities of
21:47a casting or cast symmetrical object and none of them.
21:52So, the answer is option C. Cast symmetrical object. True-centrifugal casting is used to cast symmetrical object.
22:02Next, in slash casting process, molten metal is poured into die cavity and at a predetermined time, the mold is
22:15inverted to permit a part of the metal still in molten state to flow out of cavity.
22:23We fade into the cavity. We fade into the cavity. We fade into the cavity in metallic mold by gravity
22:28or force into the mold under high pressure or none of them.
22:33So, the answer is option M. In slash casting process, molten metal is poured into die cavity and at a
22:42predetermined time, the mold is inverted to permit a part of the mold still in molten state to flow out
22:52of cavity.
22:54Next, true-centrifugal casting is poured into the cavity.
23:01In die casting process, molten metal is poured into the cavity and at a predetermined time, the mold is poured
23:06into the cavity and at a predetermined time, the mold is poured into the cavity and at a predetermined time.
23:20So, the answer is option B. In die casting process, molten metal is poured into the cavity and at a
23:29predetermined time, the mold is poured into the cavity and at a predetermined time.
23:52In die casting process, the mold is poured into the cavity and at a predetermined time, the mold is poured
23:59into the cavity and at a predetermined time.
24:04Next, in hot chamber method of die casting, die is kept hot of electrical heating, only low melting point metal
24:13can be cast.
24:37Next, in cold chamber method of die casting, die is kept hot by electrical heating.
24:44High melting point metal can be cast.
24:48The melting pot is separate from die casting machine, both B and C.
24:57In cold chamber method of die casting, high melting point metal can be cast.
25:05The melting pot is separate from die casting machine.
25:09Next, cold shot or casting defect, which is due to some sand sharing from the cob surface, caused by two
25:23streams of metal that are too cold to fuse properties,
25:42Next, scape or buckles are the casting defect, caused by two streams of metal that are too cold to fuse
25:50properties.
25:51Next, scape or buckles are the casting defect, caused by some sand sharing from the cob surface,
26:02or two streams of metal that are too cold to fuse properties, or discontinuity in metal casting resulting from hindered
26:12construction,
26:14or D, none of these.
26:17So, here answer is option A, scape or buckles are the casting defect, caused by some sand sharing from the
26:26cob surface,
26:30Next, blow hole or casting defect caused by some sand sharing from the cob surface,
26:38Excessive gaseous substance, excessive gaseous substance not able to escape, or discontinuity in casting resulting from hindered construction, or two
26:49streams of metal that are too cold to fuse properties.
26:54So, here answer is option B,
26:57Excessive gaseous substance not able to escape,
27:00Blow hole or casting defect caused by excessive gaseous substance not able to escape,
27:09Next,
27:11Hot tear or casting defect caused by
27:15Discontinuity in metal casting resulting from hindered construction,
27:21Contraction,
27:21Two streams of molten metal that are too cold to fuse properties, or some sand sharing from the cob surface,
27:33or none of these.
27:34So, here answer is option A,
27:39Discontinuity in metal casting resulting from hindered construction,
27:44In tears, tears are casting defect caused by discontinuity in metal casting resulting from hindered construction,
27:56Next,
28:00Chill casting used for making cast iron roll, railways, carriage wheels, etc. are commonly produced by the dust molding, dry
28:13sand,
28:28Next,
28:33Chills are used while casting, when days at a junction,
28:39Additional strength is required,
28:43A void is desired,
28:47A void is desired,
28:49A localized cooling is required,
28:51A molten,
28:52A metallic insertion is required,
28:57So, here answer is option B,
28:59A void is required,
29:02Chiller used while casting,
29:04When a void is required at a suction,
29:08Next,
29:10Next,
29:11The purpose of buckling core is to remove moisture,
29:15Harden the binder,
29:17Fused,
29:18Silica,
29:19Grain,
29:20Ya burn,
29:22Carbonous,
29:22Metal,
29:27Binder,
29:30The purpose of backing core is to harden the binder,
29:36Next,
29:39When the change in casting section is too abrupt,
29:45It causes the dust defect,
29:47Shrinkage,
29:48Hot tear,
29:49Miss run,
29:51Ya none of dust,
29:51So, here answer is option A,
29:53Shrinkage defect,
29:55When the change in casting section is too abrupt,
30:01It causes the shrinkage defect,
30:04Next,
30:06The most detrimental defect of cupola is that,
30:10Is not possible to make high alloy addition during melting,
30:15Cannot be used to refine metals,
30:19Is not possible to take sample of molten metal for the purpose of qualify control,
30:26Ya none of this,
30:28So, here answer is option B,
30:32Cannot be used to refine metals,
30:36The most detrimental defect of cupola is that,
30:41It cannot be used to refine metals,
30:44Option B,
30:46Next,
30:49In true centrifugal casting process,
30:52The dash of the mould and casting are the same,
30:58Next,
30:59So here answer is option B,
31:02In true centrifugal casting process,
31:05The size of the mould and casting are the same,
31:09Next step,
31:12Still before pouring into mould during casting of steel,
31:17must be thoroughly oxidized, deoxidized, normalized and non-optized.
31:24So, the answer is option B, deoxidized.
31:28Still before pouring into mold, during casting of steel must be thoroughly deoxidized.
31:36So, this is all in the next video.
31:40See you in the next video.
31:41Jai Hind!
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