MCQOPTIONS
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MCQOPTIONS
This section includes 303 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
Dry sand cores may be required for the provision of spigot at the end section of the casting. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 252. |
In centrifugal casting, only sand moulds can be used due to the problem of sticking of metal. |
| A. | true |
| B. | false |
| Answer» C. | |
| 253. |
The axis of rotation of the mould should be horizontal for the casting of long pipes in centrifugal casting. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 254. |
5 CENTRIFUGAL CASTING |
| A. | true |
| B. | false |
| Answer» C. | |
| 255. |
Which of the following methods of casting is best suited for casting of hollow pipes and tubes? |
| A. | investment casting |
| B. | permanent mould casting |
| C. | die casting |
| D. | centrifugal casting |
| Answer» E. | |
| 256. |
Which of the following forces provides continuous pressure on the metal in centrifugal casting? |
| A. | spring force |
| B. | centrifugal force |
| C. | gravitational force |
| D. | frictional force |
| Answer» C. gravitational force | |
| 257. |
True centrifugal casting method is usually used to make |
| A. | bent pipes |
| B. | hollow pipes |
| C. | bolts |
| D. | nuts |
| Answer» C. bolts | |
| 258. |
Which of the type of centrifugal casting methods is used to produce ‘non- symmetrical’ shaped castings? |
| A. | true centrifugal casting |
| B. | semi centrifugal casting |
| C. | centrifuging |
| D. | non centrifugal casting |
| Answer» D. non centrifugal casting | |
| 259. |
The tundish is a |
| A. | pouring vessel |
| B. | riser |
| C. | type of core |
| D. | machine name |
| Answer» B. riser | |
| 260. |
Squeeze casting method was developed in which country? |
| A. | japan |
| B. | india |
| C. | america |
| D. | russia |
| Answer» E. | |
| 261. |
The casting process that does not require a core to produce a hollow casting is? |
| A. | shell moulding |
| B. | hot-chamber die casting |
| C. | permanent mould casting |
| D. | true centrifugal casting |
| Answer» D. true centrifugal casting | |
| 262. |
Which of the following is a limitation of die casting, but is overcome in vacuum die casting? |
| A. | the air left in the cavity when the die is closed |
| B. | the moisture left in the cavity when the die is closed |
| C. | the air left in the cavity when the die is open |
| D. | the moisture left in the cavity when the die is open |
| Answer» B. the moisture left in the cavity when the die is closed | |
| 263. |
Pattern used in shell moulding is normally made up of? |
| A. | wax |
| B. | metal |
| C. | wood |
| D. | plastic |
| Answer» C. wood | |
| 264. |
In PIC, any wax remnants are dissolved with the help of hot vapors of a solvent. Which solvent is used for this purpose? |
| A. | ethanol |
| B. | chlorofluorocarbon |
| C. | trichloroethylene |
| D. | any of the above |
| Answer» D. any of the above | |
| 265. |
Another name of Gravity Die Casting is? |
| A. | centrifugal casting |
| B. | permanent mould casting |
| C. | precision investment casting |
| D. | hot chamber process |
| Answer» C. precision investment casting | |
| 266. |
In precision investment casting, to make the mould the prepared pattern is dipped into a slurry. From which material is this slurry is made up of? |
| A. | ethyl silicate |
| B. | sodium silicate |
| C. | both ethyl and sodium silicate |
| D. | neither ethyl nor sodium silicate |
| Answer» D. neither ethyl nor sodium silicate | |
| 267. |
Cylinder and cylinder heads for air cooled IC engines are casted using which technique? |
| A. | precision investment casting |
| B. | shell moulding |
| C. | permanent mould casting |
| D. | die casting |
| Answer» C. permanent mould casting | |
| 268. |
Which of the following statement is true? |
| A. | the size of the casting can be adjustable |
| B. | the size of the casting is not limited |
| C. | the size of the casting obtained by shell moulding is limited |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 269. |
Which is the most widely used resin in shell moulding? |
| A. | phenol formaldehyde |
| B. | ethanol formaldehyde |
| C. | phenol |
| D. | ethanol |
| Answer» B. ethanol formaldehyde | |
| 270. |
Which type of sand is used in shell moulding? |
| A. | black sand |
| B. | wet and fine sand |
| C. | dry and fine sand |
| D. | any of the sand |
| Answer» D. any of the sand | |
| 271. |
Why is inoculation done certain times during melting of cast iron? |
| A. | to enhance its mechanical properties |
| B. | to reduce the liquid shrinkage of metal |
| C. | to enhance the surface finishing |
| D. | all of the mentioned |
| Answer» B. to reduce the liquid shrinkage of metal | |
| 272. |
Which of the following is/are not used to melt material in casting(foundry) industries? |
| A. | cupola furnace |
| B. | induction furnace |
| C. | ladle furnace |
| D. | crucible furnace |
| Answer» D. crucible furnace | |
| 273. |
Gas-Fired burner is used in which of the following furnace? |
| A. | induction furnace |
| B. | reverberatory furnace |
| C. | cupola furnace |
| D. | crucible furnace |
| Answer» C. cupola furnace | |
| 274. |
What is inoculation of cast iron? |
| A. | addition of sulphur alloys |
| B. | addition of silicon alloys |
| C. | addition of oxides |
| D. | addition of parent metal’s ore |
| Answer» C. addition of oxides | |
| 275. |
Which of the following metal has a melting point of about 660oC and latent heat of fusion 92.7 cal/g? |
| A. | aluminium |
| B. | lead |
| C. | magnesium |
| D. | tin |
| Answer» B. lead | |
| 276. |
Which of the following metal has a melting point of about 420oC and latent heat of fusion 26.3 cal/g? |
| A. | nickel |
| B. | copper |
| C. | zinc |
| D. | iron |
| Answer» D. iron | |
| 277. |
Which of the following is/are the advantage(s) of an Induction Furnace? |
| A. | higher yield |
| B. | cleaner melting |
| C. | compact installation |
| D. | all of the mentioned |
| Answer» E. | |
| 278. |
Why are flux added to the charge ( parent metal to be melted) during melting of a metal? |
| A. | to increase carbon content |
| B. | to increase refractoriness |
| C. | to add specific oxides |
| D. | to remove specific oxides |
| Answer» E. | |
| 279. |
What is hearth in a furnace? |
| A. | the electrodes are often called hearth |
| B. | the walls of the furnace |
| C. | the bowl shaped bottom of the furnace |
| D. | the dome shaped roof of the furnace |
| Answer» D. the dome shaped roof of the furnace | |
| 280. |
Which of the following metal has a melting point of about 1537oC and latent heat of fusion 65.0 cal/g? |
| A. | nickel |
| B. | copper |
| C. | zinc |
| D. | iron |
| Answer» E. | |
| 281. |
Which of the following chemical compound, is the most common flux added to the charge in a cupola furnace? |
| A. | coke |
| B. | methane |
| C. | carbon dioxide |
| D. | limestone |
| Answer» E. | |
| 282. |
Incoming air pressure and quantity in cupola furnace are controlled by which of the following element? |
| A. | tuyeres |
| B. | tapping spout |
| C. | wind box |
| D. | blast pipe |
| Answer» D. blast pipe | |
| 283. |
What is the function of slag hole in a cupola furnace? |
| A. | to tap the slag generated |
| B. | to generate the slag |
| C. | to allow outflow of gases |
| D. | all of the mentioned |
| Answer» B. to generate the slag | |
| 284. |
Why is sand bed prepared for melting of metal in Cupola furnace? |
| A. | it provides a refractory bottom |
| B. | it soaks the moisture from the metal |
| C. | it conducts the heat faster and uniformly |
| D. | none of the mentioned |
| Answer» B. it soaks the moisture from the metal | |
| 285. |
For melting of cast iron, which of the following furnace is used? |
| A. | rotary furnace |
| B. | cupola furnace |
| C. | pit furnace |
| D. | electric furnace |
| Answer» C. pit furnace | |
| 286. |
Flow ability increases with increase in the green strength. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 287. |
The adhesiveness and cohesiveness are the same properties of the molding sand. |
| A. | true |
| B. | false |
| Answer» C. | |
| 288. |
Which of the following is the most important property of the molding sand in cores? |
| A. | dry strength |
| B. | green strength |
| C. | collapsibility |
| D. | cohesiveness |
| Answer» D. cohesiveness | |
| 289. |
Binding property of the sand increases because of the property. |
| A. | cohesiveness |
| B. | collapsibility |
| C. | flow ability |
| D. | permeability |
| Answer» B. collapsibility | |
| 290. |
The property ensures the removal of excess sand in the mould box. |
| A. | adhesiveness |
| B. | cohesiveness |
| C. | green strength |
| D. | compressive strength |
| Answer» B. cohesiveness | |
| 291. |
Molding sand can withstand chemical reactions on it and prove it to be beneficial for the casting formation. |
| A. | true |
| B. | false |
| Answer» C. | |
| 292. |
The size of the sand particles in the molding sand is the biggest. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 293. |
The is responsible for the impact strength in the molding sand. |
| A. | aggregates |
| B. | refractoriness |
| C. | impurities |
| D. | permeability |
| Answer» B. refractoriness | |
| 294. |
Which of the following is not used for the formation of the molding sand? |
| A. | silica sand |
| B. | binders |
| C. | additives |
| D. | coal |
| Answer» E. | |
| 295. |
The following figure depicts which allowance? |
| A. | machining allowance |
| B. | shrinkage allowance |
| C. | draft allowance |
| D. | shake allowance |
| Answer» D. shake allowance | |
| 296. |
A pattern is shaken by striking it with a wooden piece. A negative allowance is provided for this. Which allowance is it? |
| A. | machining allowance |
| B. | rapping allowance |
| C. | distortion allowance |
| D. | contraction allowance |
| Answer» C. distortion allowance | |
| 297. |
Ferrous metals need more allowance than non-ferrous metals. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 298. |
How much does the distortion allowance vary? |
| A. | 1mm to 10mm |
| B. | 2mm to 20mm |
| C. | 1mm to 15mm |
| D. | 2mm to 15mm |
| Answer» C. 1mm to 15mm | |
| 299. |
Machining allowance does not depend on which of the following factor? |
| A. | solidifying contraction |
| B. | machining method |
| C. | shape and size of casting |
| D. | casting method |
| Answer» B. machining method | |
| 300. |
A pattern carries which allowance for internal and external surfaces? |
| A. | shrinkage allowance |
| B. | machining allowance |
| C. | distortion allowance |
| D. | draft allowance |
| Answer» E. | |