- 1 week ago
Category
📚
LearningTranscript
00:00नमस्कार दोस्तों मेटलर्जी की उइने में आपका सवागत है दोस्तों आज इस वीडियो में फांटरी टेक्नोलोजी का 50 कोश्चन डिसकस
00:08करने वाले हैं और दोस्तों आप अगर इस चनल में नहीं हो तो चनल को सब्सक्राइब कर दिजिए और सदो
00:14सद बेल आइकोन को में �
00:15दबा दीजिए ताकि हार एक नया नया आपडेट आपके पास पहुंचते रहे तो दोस्तों अपका फ्रेंड या यार से जुरूर
00:22स्यर करें तो दोस्तों टाइम ओस्ट ना करते हुए चलिए शुरू करते हैं तो दोस्तों आज का फैला क्वेस्टन है
00:30वाट इस दा पेटर
00:46for marcast process a d both b and c c answer option d both b and c
00:53wax for lost wax process and frozen mercury for marcast process
01:01next
01:04molds in a continuous casting process is made of aluminum copper stainless steel
01:11or bronze say answer option b copper molds in a continuous casting process is made of copper
01:23next d dactyl cast iron is also called the dash iron mottled nodular cast gray cast
01:32or white cast say answer option b nodular cast dactyl cast iron is also called the dash iron
01:41say answer option b nodular cast iron next carbon is present in the form of graphite
01:51flags in the dash cast iron gray cast iron white cast iron or nodular cast iron or maleable cast iron
01:58say answer option a gray cast iron carbon in present carbon is present in
02:08the form of graphite flags in the dash cast iron say answer option a gray cast iron
02:17next dasto in white cast iron carbon is present in the form of graphite nodules graphite flags
02:26in dash iron
02:27any carbon or beige cast iron is present in the form of cement iron
02:38and carbon is present in the form of cement iron
02:39then carbon is present partly in the form of graphite flags and partly in the form of cement iron
02:52in dash iron, motulate, malleable, white cast, anodular cast.
02:59So you answer the option A, motulate iron.
03:02Carbon is present partly in the form of graphite flag and partly in the form of cementite in
03:10motulate iron.
03:12Next A, what is the melting point of pure silica sand?
03:21Right answer is option C, 1150 degree centigrade.
03:26What is the melting point of pure silica sand?
03:29Right answer is 1150 degree centigrade.
03:32Next With increase in the clay content of the molding sand, its permeability number increase,
03:41green compression strength increase or permeability number decrease or both B and C.
03:49Say answer is option D, both B and C.
03:52Green compression strength increase and permeability number decrease.
03:58With increase in the clay content of the molding sand, its green compression strength increase
04:08and permeability number decrease.
04:10Next, pick out the wrong statement.
04:15Finer sand has comparatively lower fusion point than that of coarser grain sand.
04:23With increase in moisture content, the grain compression strength of the molding sand decrease.
04:30Bentonite is used in molding sand to improve the hot strength of the mold.
04:37The permeability of molds made by finer sand is less than that made by coarser grain sand.
04:45Say answer is option C.
04:50Bentonite is used in molding sand to improve the hot strength of the mold.
04:59Next, dosto.
05:01The use of dust enhances the efficiency of the riser.
05:05Chill, chaplets, bottom gate and none of these.
05:11Say answer is option A. Chills.
05:14The use of dust enhances the efficiency of the riser.
05:17Say answer is option A. Chill.
05:22Next, out of the flowing, the pouring rate is slowest for dust casting.
05:35Aluminium, cast iron, mild steel and zinc.
05:39Say answer is option A. Aluminium.
05:41Out of the flowing, the pouring rate is slowest for dust casting.
05:47Say answer is aluminum casting.
05:51Next, visual inspection of casting cannot detect the dust defect.
05:56Blow hole, sheet metal penetration and none of these.
06:01Say answer is option A. Blow hole defect.
06:05Visual inspection of casting cannot detect the blow hole defect.
06:11Next, dust process is used for casting dental alloy.
06:17True centrifugal investment casting.
06:20True centrifugal investment casting.
06:20Dry sand and none of these.
06:22Say answer is option B. Investment casting.
06:26Dust process is used for casting dental alloy.
06:31Say answer is option B. Investment casting.
06:37Next, over phase tendency exists in the dash casting.
06:42Small diameter, pulleys.
06:45Small, cylindrical, large, flat, thin.
06:48A. D. All A, B and C.
06:50Say answer is option C.
06:54Option C. Large, flat and thin casting.
06:57War phase tendency exists in the large, flat and thin casting.
07:05Next, for steel casting.
07:08Pouring time in second is given by.
07:11Say answer is option A. K dot root under X.
07:16Where X is equals to weight of the casting.
07:19IBS.
07:20K is equals to constant.
07:221.2 for casting.
07:24Weighting less than 100 LBS.
07:28And 0.4 for casting.
07:31Weighting upto 1 lakh IBS.
07:38For steel casting.
07:39Pouring time in second is given by.
07:42K dot root under X.
07:45Next, to make a hole in the casting.
07:50Dash core is used.
07:51Cover, wing, balance or none of these.
07:55Say answer is option B. Wing core.
07:57To make a hole in the casting.
08:00Dash core is used.
08:01Say answer is wing core.
08:05Next, pick out the correct statement.
08:08Shrinkage allowance provided in cast iron is more than that in cast steel product.
08:15Molding sand is also termed as base sand.
08:19A fine sand and thermosetting is used in shell molding.
08:26A plaster is never used for making patterns.
08:32Say answer is option B.
08:36Molding sand is also termed as base sand.
08:41Figure out the correct statement.
08:43Say answer is option B.
08:44Molding sand is also termed as base sand.
08:50Next, wrapping operation is meant for the chaplet fixing, pattern stripping after molding,
08:57a core making, a core making, a none of these.
08:59Say answer is option A. Chaplet fixing.
09:02Wrapping operation is meant for the chaplet fixing.
09:07Next, dash allowance is provided in the pattern to facilitate its easy stripping from the molds.
09:17Draft, shrinkage, wrapping, a warp.
09:21Say answer is option C. Wrapping.
09:23Wrapping allowance is provided in the pattern to facilitate its easy stripping from the mold.
09:33Next,
09:37During production of malleable iron by annealing of white cast iron, the nucleation rate is favored by the high silicon
09:47content, rapid heating rate, both A and B, neither A nor B.
09:53Say answer is option A.
09:55High silicon content.
09:58During production of malleable iron by annealing of white cast iron, the nucleation rate is favored by the high silicon
10:07content.
10:07Next,
10:11Desk molds are most suitable for satisfactorily casting of reactive metals like titanium alloy, dry sand, plaster of paris, graphite
10:22or loam sand.
10:25Say answer is option C. Graphite.
10:27Desk molds are most suitable for satisfactory casting for reactive metals like titanium alloy.
10:36Say answer is graphite.
10:39Next,
10:41Next,
10:41Hot chamber die casting machine is suitable for the dash melting alloy.
10:46Low,
10:47High,
10:47A,
10:48and B,
10:49neither A nor B.
10:51Say answer is option A.
10:53Low melting alloy.
10:55Hot chamber die casting machine is suitable for the dash melting alloy.
11:01Say answer is low melting alloy.
11:03Next,
11:05Desk casting are normally made using true centrifugal casting process.
11:11Holocentrifugal,
11:12alloy steel,
11:14small solid,
11:15or complicated shape.
11:17Say answer is option A.
11:19Holocentrical,
11:22cylindrical,
11:23sorry.
11:24Desk casting are normally made using true centrifugal casting process.
11:29Say answer is hollow cylindrical.
11:33Next,
11:34Desk pattern is used in the case of shell molding.
11:39Cold,
11:40Hot,
11:41A,
11:41A plaster of Paris.
11:43Say answer is option B.
11:45Hot.
11:46Hot pattern is used in the case of shell molding.
11:51Next,
11:53Which of the following is used to overcome the shifting of the core due to
12:05metallostatic pressure of the molten metal?
12:12Say answer is chaplet.
12:26Next,
12:30Metal should used in shot blasting are normally made of tungsten, cast iron, steel, or brushes.
12:38Say answer is option C.
12:41Steel.
12:44Metal should used in shot blasting are normally made of steel.
12:53Next,
12:56Mold made of dust is used in centrifugal casting.
13:01Plaster of paris,
13:02Plaster of paris,
13:03frozen mercury,
13:04metal.
13:05Say answer is option D.
13:07Metal.
13:08Mold made of dust is used in centrifugal casting.
13:13Say answer is metal.
13:14Metal use hootah hai.
13:16Next,
13:17Desk is used for making chaplets.
13:20Plaster of paris,
13:21Plaster of paris,
13:23wood,
13:23wax.
13:24Say answer is A.
13:26Option B.
13:26Metal.
13:27Metal is used for making chaplets.
13:31Next,
13:35Desk of sand is used for shutter test.
13:40Toughness,
13:42Grain,
13:44Fineness number,
13:46Sintering,
13:47Temperature,
13:47None of these.
13:48Say answer is option A.
13:50D.
13:50Toughness.
13:51Toughness of sand is found by shutter test.
13:55Shutter test.
13:58Next,
14:02Mold wash is used to dash of the molds.
14:06Increase the hot strength,
14:08Increase the grain compressive strength,
14:10or decrease the permeability,
14:13and none of these.
14:14Say answer is option D.
14:16None of these.
14:25Next,
14:26Next,
14:26With increase in its moisture content,
14:29the permeability number of molding sand increase,
14:33first increase and then decrease,
14:35a decrease,
14:36a first decrease and then increase.
14:38Say answer is option B.
14:41First increase and then decrease.
14:51Next,
14:55Pick out the wrong statement.
14:58Bentonite belongs to Montmorillonite group of clay.
15:07Plasticity of molding sand is affected by pH value of the clay.
15:13Zircon sand is not used in foundry due to its higher bulk density and lower fusion point.
15:21A pouring rate of molten metal in molds does affect the quality of casting.
15:32Next,
15:34Next,
15:38Next,
15:43Next,
15:49Next,
15:50relief sprues or skin bobs in the gating system is to collect slag or dross present in the metal,
16:01minimize the erosion of downed sprues, avoid the use of runner and step gate and none of these.
16:10Say answer option L. Collect slag or dross present in the metal. The purpose of providing
16:19relief sprues or skin bobs in the gating system is to collect slag or dross present in the metal.
16:32Next, in a cupola, the ratio of heart area to the total twerce area is about. Say answer option B.
16:55Non of these. Cover core is used to cover keyscore on the top of core in investment casting mold or
17:05none of these.
17:06Say answer option D. Non of these. Cover core is used to cover keyscore
17:13on the top of core in investment casting mold or none of these. Say answer D. Next,
17:20this is used for studying the expansion characteristics of sand specimen.
17:32color sprues or sand specimen.
17:32Dilettometer, permeability meter, sand molar or none of these. Say answer option A. Dilettometer.
17:42D.A is used for studying the expansion characteristics of sand specimen. Say answer D. Next,
17:51Next, which of the following factors restricts the production of low-carbon iron in cupola?
18:00Iron is in direct contact of coke.
18:04Carbon present in the metallic charge cannot be fully reduced or erosion of cupola lining
18:13add to the carbon in metal and flux provided additional carbon to the metal.
18:22So, the answer is option A. Iron is in direct contact of coke.
18:30Which of the following factors restricts the production of low-carbon iron in cupola?
18:37Iron is in direct contact of coke.
18:41Next, pick out the correct statement.
18:47Lighting of coke-bait in cupola is done after raw material charging during the operation of cupola.
18:56Metal and slag are taken out of the cupola through the same tap hole at different intervals in a cupola.
19:05The silicon and carbon percentage in white cast iron is never less than that in the grey cast iron.
19:13The presence of silicon in cast iron favors the formation of graphite while the presence of sulfur favors the formation
19:26of cementite.
19:41Think out the correct statement.
19:43Say answer is option D.
19:43Next, addition of dash helps in obtaining spheroidal graphite in the manufacture of ductile iron.
19:56Sodium, magnesium, potassium or none of these.
20:00Say answer is magnesium.
20:03Next, addition of dash helps in obtaining spheroidal graphite in the manufacture of ductile iron.
20:11Say answer is magnesium.
20:12Next, blowhole formation in casting is not promoted by the use of semi-dried moulds, non-preheated ladles or organic
20:26binders for core making or inorganic binders as molding material.
20:39Next, blowhole formation in casting is not promoted by the use of inorganic binders as molding material.
20:52Next, high pressed density molds are made on machines applying a pressure of 10 kg force per centimeter square onward.
21:03Say answer is option C.
21:0510 kg.
21:08High pressed density molds are made on machines applying a pressure of 10 kg force per centimeter square onward.
21:22Next, addition of dash is done to achieve grain refinement of aluminum melt, sodium, titanium, chromium or boron.
21:32Say answer is option C.
21:35Option C.
21:35Chromium.
21:36Addition of chromium is done to achieve grain refinement of aluminum melt.
21:44Next, draws floating on the molten bath of aluminum is nothing but aluminum, carbide, oxide, sulfide or chloride.
21:56Say answer is option B. Oxide.
21:59Next, draws floating on the molten bath of aluminum is nothing but aluminum oxide.
22:07Next, pick out the wrong statement.
22:11Even without doing any heat treatment, low carbon steel casting may be used.
22:17Rub coarse grain surface is produced in shrinkage cavity in a cast product.
22:25The molding material obtained after shrinking out the silica sand molds are reused.
22:33In mark cast process, the pattern is made of plaster of berries.
22:41Say answer is option D.
22:46Figure out the wrong statement.
22:48Option D.
22:49In mark cast process, the pattern is made of plaster of berries.
22:56Crack in casting is not caused due to the failure of temperature just after quenching, high pouring temperature, residual or
23:07internal stress or use of improper quenching medium.
23:11Say answer is option B.
23:13Say answer is option B.
23:14High pouring temperature.
23:16Crack in casting is not caused due to the high pouring temperature.
23:26Next, skin bob is attached to ingots.
23:31Next, skin bob is attached to ingots, pouring cup, sprue, and riser.
23:34Say answer is option C. Sprue.
23:38Skin bob is attached to sprue.
23:42Next, fin in a casting is a void formation, thin, unwanted projection of metal.
23:53Crack form due to internal or external stress or defect due to the misrun of metal.
24:03Say answer is option B.
24:05Thin unwanted projection of metal.
24:09Fin is a casting is a thin unwanted projection of metal.
24:18Next,
24:22In a foundry, an dash furnace is not used for melting of steel.
24:30Induction, acid electric arc, rocking arc or none of these.
24:36Say answer is option C. Rocking arc.
24:40In a foundry, an dash furnace is not used for melting of steel.
24:45Say answer is option C. Rocking arc.
24:51Next, height of cockpit in a cupola is measured from the slag tapping hole, twerch level, metal tapping hole, and
25:01none of these.
25:02Say answer is option B. Twerch level.
25:05Next, height of cockpit in a cupola is measured from the twerch level.
25:25Next,
25:26Say answer is option C.
25:28Spherical.
25:29Riser of minimum size will be obtained from the spherical shape.
25:35Next,
25:37Next,
25:38Which of the following is a non baking binder used for core making?
25:57Next,
26:00Next,
26:05Next,
26:06Option A.
26:07Option A.
26:07Phenol-purpural grazing.
26:10Next,
26:12Pick out the correct statement.
26:14Partsion 2.
26:16Centrifugal casting process.
26:18It is used for making small solid casting, higher speed of rotating, resulting in increased energy consumption,
26:29Incompensated by good quality of casting and impurities and raised foreign material present in the metal collected at the inner
26:39surface of the casting.
26:41The none of these.
26:44Say answer is option C.
26:46Figure out the correct statement.
26:48Partsion 2.
26:49Centrifugal casting process.
26:51Say answer is option C.
26:52Option B.
26:53Incompensated by impurities and foreign materials present in the metal collected at the inner surface of the casting.
27:02Next,
27:05Presence of dash in silica sand lowers the fusion point of the molding sand.
27:11Calcium phosphate, alkali oxide, titanium oxide, none of these.
27:18Say answer is option B.
27:19Alkali oxide.
27:20Presence of alkali oxides in silica sand lowers the fusion point of the molding.
27:28तो दोस्तो आज की वीडियो में इतना है मिलते हैं.
27:30Next वीडियो में जाए हैं.
27:32जाए हैं.
Comments