MCQOPTIONS
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MCQOPTIONS
This section includes 482 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
Muntz metal contains copper and zinc in the ratio of%! |
| A. | 50 : 50 |
| B. | 40 : 60 |
| C. | 60 : 40 |
| D. | 20 : 80 |
| Answer» D. 20 : 80 | |
| 202. |
Maximum percentage of carbon in ferrite is%! |
| A. | 0.025% |
| B. | 0.06% |
| C. | 0.1% |
| D. | 0.25% |
| Answer» B. 0.06% | |
| 203. |
According to Indian standard specifications, plain carbon steel designated by 40 C8 means that the carbon content is%! |
| A. | 0.04% |
| B. | 0.35 to 0.45% |
| C. | 0.4 to 0.6% |
| D. | 0.6 to 0.8% |
| Answer» C. 0.4 to 0.6% | |
| 204. |
The strength is the ability of a material to resist%! |
| A. | Deformation under stress |
| B. | Externally applied forces with breakdown or yielding |
| C. | Fracture due to high impact loads |
| D. | None of these |
| Answer» C. Fracture due to high impact loads | |
| 205. |
The steel widely used for motor car crankshafts is%! |
| A. | Nickel steel |
| B. | Chrome steel |
| C. | Nickel-chrome steel |
| D. | Silicon steel |
| Answer» C. Nickel-chrome steel | |
| 206. |
*$_The alloying element which increases residual magnetism and coercive magnetic force in steel for magnets is? |
| A. | Chromium |
| B. | Nickel |
| C. | Vanadium |
| D. | Cobalt |
| Answer» E. | |
| 207. |
*$_Grey cast iron has? |
| A. | Carbon in the form of free graphite |
| B. | High tensile strength |
| C. | Low compressive strength |
| D. | All of these |
| Answer» B. High tensile strength | |
| 208. |
*$_Solder is an alloy consisting of? |
| A. | Tin, antimony, copper |
| B. | Tin and copper |
| C. | Tin and lead |
| D. | Lead and zinc |
| Answer» C. Tin and lead | |
| 209. |
*$_The following element can't impart high strength at elevated temperature? |
| A. | Manganese |
| B. | Magnesium |
| C. | Nickel |
| D. | Silicon |
| Answer» C. Nickel | |
| 210. |
*$_Muntz metal contains copper and zinc in the ratio of? |
| A. | 50 : 50 |
| B. | 40 : 60 |
| C. | 60 : 40 |
| D. | 20 : 80 |
| Answer» D. 20 : 80 | |
| 211. |
*$_Maximum percentage of carbon in ferrite is? |
| A. | 0.025% |
| B. | 0.06% |
| C. | 0.1% |
| D. | 0.25% |
| Answer» B. 0.06% | |
| 212. |
*$_According to Indian standard specifications, plain carbon steel designated by 40 C8 means that the carbon content is? |
| A. | 0.04% |
| B. | 0.35 to 0.45% |
| C. | 0.4 to 0.6% |
| D. | 0.6 to 0.8% |
| Answer» C. 0.4 to 0.6% | |
| 213. |
*$_The strength is the ability of a material to resist? |
| A. | Deformation under stress |
| B. | Externally applied forces with breakdown or yielding |
| C. | Fracture due to high impact loads |
| D. | None of these |
| Answer» C. Fracture due to high impact loads | |
| 214. |
*$_The steel widely used for motor car crankshafts is? |
| A. | Nickel steel |
| B. | Chrome steel |
| C. | Nickel-chrome steel |
| D. | Silicon steel |
| Answer» C. Nickel-chrome steel | |
| 215. |
*$_Cobalt in steel? |
| A. | Improves wear resistance, cutting ability and toughness |
| B. | Refines grain size and produces less tendency to carburisation, improve corrosion and heat resistant proper ties |
| C. | Improves cutting ability and reduce hardenability |
| D. | Gives ductility, toughness, tensile strength and anti corrosion property |
| Answer» D. Gives ductility, toughness, tensile strength and anti corrosion property | |
| 216. |
*$_Eutectoid steel contains following percentage of carbon? |
| A. | 0.02% |
| B. | 0.3% |
| C. | 0.63% |
| D. | 0.8% |
| Answer» E. | |
| 217. |
*$_Quenching is not necessary when hardening is done by? |
| A. | Case hardening |
| B. | Flame hardening |
| C. | Nitriding |
| D. | Any one of these |
| Answer» D. Any one of these | |
| 218. |
*$_The crystal structure of brass is? |
| A. | F.C.C. |
| B. | B.C.C. |
| C. | H.C.P. |
| D. | Orthorhombic crystalline structure |
| Answer» B. B.C.C. | |
| 219. |
*$_Which of the following metal shrinks most from molten state to solid state?? |
| A. | Cast iron |
| B. | Cast steel |
| C. | Brass |
| D. | Admiralty metal |
| Answer» E. | |
| 220. |
*$_1841 high speed steel contains? |
| A. | Vanadium 4%, chromium 18% and tungsten 1% |
| B. | Vanadium 1%, chromium 4% and tungsten 18% |
| C. | Vanadium 18%, chromium 1% and tungsten 4% |
| D. | None of the above |
| Answer» C. Vanadium 18%, chromium 1% and tungsten 4% | |
| 221. |
*$_Cold rolled steel sheets contain carbon of the following order? |
| A. | 0.1% |
| B. | 0.2% |
| C. | 0.4% |
| D. | 0.6% |
| Answer» B. 0.2% | |
| 222. |
*$_Which of the following statements are true for annealing of steels?? |
| A. | Steels are heated to 500 to 700°C |
| B. | Cooling is done slowly and steadily |
| C. | Internal stresses are relieved |
| D. | All of these |
| Answer» E. | |
| 223. |
*/*_Tungsten in steel? |
| A. | Improves wear resistance, cutting ability and toughness |
| B. | Refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties |
| C. | Improves cutting ability and reduces hardenability |
| D. | Gives ductility, toughness, tensile strength and anti-corrosion properties |
| Answer» C. Improves cutting ability and reduces hardenability | |
| 224. |
*/*_Slow plastic deformation of metals under a constant stress is known as? |
| A. | Creep |
| B. | Fatigue |
| C. | Endurance |
| D. | Plastic deformation |
| Answer» B. Fatigue | |
| 225. |
*/*_Admiralty gun metal contains? |
| A. | 63 to 67% nickel and 30% copper |
| B. | 88% copper, 10% tin and rest zinc |
| C. | Alloy of tin, lead and cadmium |
| D. | Iron scrap and zinc |
| Answer» C. Alloy of tin, lead and cadmium | |
| 226. |
*/*_Ball bearings are, usually, made from? |
| A. | Low carbon steel |
| B. | High carbon steel |
| C. | Medium carbon steel |
| D. | Chrome steel |
| Answer» E. | |
| 227. |
*/*_Chromium when added to steel _________ the tensile strength.? |
| A. | Does not effect |
| B. | Decreases |
| C. | Increases |
| D. | None of these |
| Answer» D. None of these | |
| 228. |
*/*_Cemented carbide tools are not found to be suitable for cutting? |
| A. | Brass |
| B. | Cast iron |
| C. | Aluminium |
| D. | Steel |
| Answer» E. | |
| 229. |
*/*_The temperature at which ferromagnetic alpha iron transforms to paramagnetic alpha iron is? |
| A. | 770°C |
| B. | 910°C |
| C. | 1050°C |
| D. | Below recrystallization temperature |
| Answer» B. 910¬¨‚àûC | |
| 230. |
*/*_Which of the following alloys does not have copper as one of the constituents?? |
| A. | Delta metal |
| B. | Monel metal |
| C. | Constantan |
| D. | Nichrome |
| Answer» E. | |
| 231. |
*/*_Preheating is essential in welding? |
| A. | Cast iron |
| B. | High speed steel |
| C. | All nonferrous materials |
| D. | All of the above |
| Answer» B. High speed steel | |
| 232. |
*/*_Delta-iron occurs between the temperature ranges of? |
| A. | 400°C to 600°C |
| B. | 600°C to 900°C |
| C. | 900°C to 1400°C |
| D. | 1400°C to 1530°C |
| Answer» E. | |
| 233. |
*/*_In spheroidising process, the steel is? |
| A. | Heated below the lower critical temperature and then cooled slowly |
| B. | Heated up to the lower critical temperature and then cooled in still air |
| C. | Heated slightly above the lower critical temperature and then cooled slowly to a temperature of 600°C |
| D. | None of the above |
| Answer» D. None of the above | |
| 234. |
*/*_Age-hardening is related with? |
| A. | Stainless steel |
| B. | Gun metal |
| C. | German silver |
| D. | Duralumin |
| Answer» E. | |
| 235. |
*/*_Recrystallization temperature is one? |
| A. | At which crystals first start forming from molten metal when it is cooled |
| B. | At which new spherical crystals first begin to form from the old deformed one when a strained metal is heated |
| C. | At which change of allotropic form takes place |
| D. | At which crystals grow bigger in size |
| Answer» C. At which change of allotropic form takes place | |
| 236. |
*/*_A reversible change in the atomic structure of steel with corresponding change in the properties is known as? |
| A. | Molecular change |
| B. | Physical change |
| C. | Allotropic change |
| D. | Solidus change |
| Answer» D. Solidus change | |
| 237. |
*/*_The charge is fed into the blast furnace through the? |
| A. | Stack |
| B. | Throat |
| C. | Bosh |
| D. | Tyres |
| Answer» C. Bosh | |
| 238. |
*/*_Compressive strength of grey cast iron in tonnes/cm is of the order of? |
| A. | 35 |
| B. | 57 |
| C. | 710 |
| D. | 1015 |
| Answer» C. 710 | |
| 239. |
*/*_Amorphous material is one? |
| A. | In which atoms align themselves in a geometric pattern upon solidification |
| B. | In which there is no definite atomic structure and atoms exist in a random pattern just as in a liquid |
| C. | Which is not attacked by phosphorous |
| D. | Which emits fumes on melting |
| Answer» C. Which is not attacked by phosphorous | |
| 240. |
*/*_The transistor is made of? |
| A. | Silver |
| B. | Gold |
| C. | Copper |
| D. | Germanium |
| Answer» E. | |
| 241. |
*/*_An engineer's hammer is made of? |
| A. | Cast iron |
| B. | Forged steel |
| C. | Mild steel |
| D. | High carbon steel |
| Answer» E. | |
| 242. |
*/*_The toughness of a material __________ when it is heated.? |
| A. | Remain same |
| B. | Decreases |
| C. | Increases |
| D. | None of these |
| Answer» C. Increases | |
| 243. |
*/*_The addition of which of the following improves machining of copper?? |
| A. | Sulphur |
| B. | Vanadium |
| C. | Tin |
| D. | Zinc |
| Answer» B. Vanadium | |
| 244. |
*/*_Cartridge brass can be? |
| A. | Cold rolled into sheets |
| B. | Drawn into wires |
| C. | Formed into tube |
| D. | Any one of these |
| Answer» E. | |
| 245. |
*/*_Age hardening is related to? |
| A. | Duralumin |
| B. | Brass |
| C. | Copper |
| D. | Silver |
| Answer» B. Brass | |
| 246. |
*/*_In nodular iron, graphite is in the form of? |
| A. | Cementite |
| B. | Free carbon |
| C. | Flakes |
| D. | Spheroids |
| Answer» E. | |
| 247. |
*/*_The ratio of the volume occupied by the atoms to the total volume of the unit cell is called? |
| A. | Coordination number |
| B. | Atomic packing factor |
| C. | Space lattice |
| D. | None of these |
| Answer» C. Space lattice | |
| 248. |
*/*_The aluminium alloy, mainly used, for anodized utensil manufacture, is? |
| A. | Duralumin |
| B. | Y-alloy |
| C. | Magnalium |
| D. | Hindalium |
| Answer» E. | |
| 249. |
*/*_The brown smoke during the operation of a Bessemer converter indicates that the? |
| A. | Air is burning out silicon and manganese |
| B. | Silicon and manganese has burnt and carbon has started oxidizing |
| C. | The converter must be titled to remove the contents of the converter |
| D. | The brown smoke does not occur during the operation of a Bessemer converter |
| Answer» B. Silicon and manganese has burnt and carbon has started oxidizing | |
| 250. |
*/*_The ultimate tensile strength and yield strength of most of the metals, when temperature falls from 0 to 100°C will? |
| A. | Increase |
| B. | Decrease |
| C. | Remain same |
| D. | First increase and then decrease |
| Answer» B. Decrease | |