MCQOPTIONS
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MCQOPTIONS
This section includes 8247 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 8201. |
Nickel is a __________ material. |
| A. | ferromagnetic |
| B. | diamagnetic |
| C. | paramagnetic |
| D. | none of these |
| Answer» B. diamagnetic | |
| 8202. |
Platinum and silver are corroded by |
| A. | caustic soda solution |
| B. | phosphoric acid |
| C. | sulphuric acid (10%) |
| D. | none of these |
| Answer» E. | |
| 8203. |
An ideal material of construction for the storage of 50% caustic soda solution would be |
| A. | karbate |
| B. | high silicon cast iron |
| C. | monel |
| D. | none of these |
| Answer» D. none of these | |
| 8204. |
Which of the following is the hardest ? |
| A. | Cementite |
| B. | Pearlite |
| C. | Austenite |
| D. | Ferrite |
| Answer» D. Ferrite | |
| 8205. |
Which of the following alloy steels is the most suitable for making gun barrels and projectiles ? |
| A. | Tungsten steel |
| B. | Molybdenum steel |
| C. | Nickel-chrome steel |
| D. | Cobalt steel |
| Answer» D. Cobalt steel | |
| 8206. |
The process of heating the cold pressed metallic powder is called __________ in powder metallurgy. |
| A. | precipitation |
| B. | fusion |
| C. | sintering |
| D. | agglomeration |
| Answer» D. agglomeration | |
| 8207. |
Sulphuric acid pickling tanks are lined with |
| A. | nickel |
| B. | rubber |
| C. | aluminium |
| D. | glass |
| Answer» C. aluminium | |
| 8208. |
Which of the following metals is not subjected to electrolytic refinning/purification? |
| A. | Copper |
| B. | Zinc |
| C. | Tin |
| D. | Aluminium |
| Answer» D. Aluminium | |
| 8209. |
The most important function of a washer is to provide bearing area and washers are normally specified by their hole diameters. The diameter of washer as compared to the nut is |
| A. | more |
| B. | less |
| C. | same |
| D. | more but less than the diameter of bolt |
| Answer» B. less | |
| 8210. |
Change in volume of metals from absolute zero temperature to their melting points is |
| A. | almost same for all metals. |
| B. | different for different metals. |
| C. | less for low melting point metals. |
| D. | less for high melting point metals. |
| Answer» B. different for different metals. | |
| 8211. |
Which is the best fertiliser for paddy ? |
| A. | Ammonium sulphate |
| B. | Nitro-phosphate |
| C. | Superphosphate |
| D. | Potassium nitrate |
| Answer» B. Nitro-phosphate | |
| 8212. |
The hardenability of steel decreases with |
| A. | decrease in dislocation density. |
| B. | increase in solutionising temperature. |
| C. | increase in strength. |
| D. | decrease in grain size. |
| Answer» E. | |
| 8213. |
Pick out the correct statement about the condensation. |
| A. | Filmwise condensation gives a lower heat transfer rate than the dropwise condensation. |
| B. | Suitable coating or vapour additive is used to promote film wise condensation. |
| C. | If a condensing liquid does not wet the surface dropwise, even then condensation will take place on it. |
| D. | Reynolds number of condensing liquid is based on its mass flow rate. |
| Answer» C. If a condensing liquid does not wet the surface dropwise, even then condensation will take place on it. | |
| 8214. |
Wohler test is a destructive test to find out the __________ strength of a prepared metal specimen. |
| A. | creep |
| B. | fatigue |
| C. | endurance |
| D. | tensile |
| Answer» C. endurance | |
| 8215. |
Alloy powder manufactured by the following process have spherical shapes. |
| A. | Electrochemical deposition. |
| B. | Gaseous reduction. |
| C. | Atomisation. |
| D. | Mechanical attrition. |
| Answer» D. Mechanical attrition. | |
| 8216. |
Which of the following is not a mixed fertiliser ? |
| A. | Nitrophosphate |
| B. | Calcium ammonium nitrate (CAN) |
| C. | Ammonium phosphate |
| D. | None of these |
| Answer» C. Ammonium phosphate | |
| 8217. |
Moist climate is the most favourable factor in the site selection far a |
| A. | steel plant |
| B. | textile factory |
| C. | petroleum refinery |
| D. | coke oven battery |
| Answer» C. petroleum refinery | |
| 8218. |
Dry saturated steam can be converted into superheated steam by |
| A. | increasing its cross-sectional area of flow. |
| B. | passing it through a pressure reducing valve. |
| C. | forcing it downwards through a vertical tube. |
| D. | none of these |
| Answer» C. forcing it downwards through a vertical tube. | |
| 8219. |
Oxyacetylene reducing flame is used while carrying out welding on |
| A. | alloy steel |
| B. | grey cast iron |
| C. | mild steel |
| D. | high carbon steel |
| Answer» D. high carbon steel | |
| 8220. |
Increasing sulphur content in pig iron tends to make it |
| A. | soft |
| B. | hard |
| C. | tough |
| D. | ductile & malleable |
| Answer» C. tough | |
| 8221. |
M10 index of coke indicates its |
| A. | compressive strength. |
| B. | hardness. |
| C. | abrasion resistance. |
| D. | impact strength. |
| Answer» D. impact strength. | |
| 8222. |
The same volume of all gases is representative of their |
| A. | specific gravities. |
| B. | densities. |
| C. | gas characteristic constants. |
| D. | molecular weights. |
| Answer» E. | |
| 8223. |
The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation is |
| A. | more |
| B. | equal |
| C. | less |
| D. | double |
| Answer» B. equal | |
| 8224. |
The specific gravity of coal depends mainly on its __________ content. |
| A. | carbon |
| B. | volatile matter |
| C. | ash |
| D. | moisture |
| Answer» E. | |
| 8225. |
In case of condensers & evaporators operating under given terminal conditions, LMTD (logarithmic mean temperature difference) for counter flow as compared to that for parallel flow is |
| A. | more |
| B. | less |
| C. | equal |
| D. | much more |
| Answer» D. much more | |
| 8226. |
Normalising does not __________ of a metal. |
| A. | improve machinability & tensile strength |
| B. | remove internal stresses |
| C. | refine the structure |
| D. | remove strains caused by cold working |
| Answer» C. refine the structure | |
| 8227. |
Oxygen cylinders used for autogenous (cutting/welding) purposes are |
| A. | seamless & made of steel. |
| B. | heat treated before use. |
| C. | made by sand casting. |
| D. | welded steel cylinders. |
| Answer» B. heat treated before use. | |
| 8228. |
Which of the following hardness tests does not measure the indentation hardness of metals and alloys ? |
| A. | Vicker's hardness test. |
| B. | Shore sceleroscope test. |
| C. | Brinell hardness test. |
| D. | Rockwell hardness test. |
| Answer» C. Brinell hardness test. | |
| 8229. |
Dowtherm is a |
| A. | high temperature heating medium (a petroleum product). |
| B. | product of coal tar distillation. |
| C. | very heat sensitive material. |
| D. | none of these. |
| Answer» B. product of coal tar distillation. | |
| 8230. |
Reaction of anhydrous liquid ammonia with orthophosphoric acid produces |
| A. | ammonium phosphate |
| B. | superphosphate |
| C. | triple superphosphate |
| D. | none of these |
| Answer» B. superphosphate | |
| 8231. |
Electric furnace method for production of phosphorous uses phosphate rock |
| A. | and phosphoric acid |
| B. | and coke |
| C. | and sulphuric acid |
| D. | silica and coke |
| Answer» E. | |
| 8232. |
__________ catalyst is used in the production of urea from CO2 and NH3. |
| A. | Vanadium pentoxide |
| B. | No |
| C. | Alumina |
| D. | Nickel |
| Answer» C. Alumina | |
| 8233. |
A nitrogenous fertiliser contains 20% N2. It could be |
| A. | ammonium nitrate. |
| B. | calcium ammonium nitrate (CAN). |
| C. | urea. |
| D. | ammonium chloride. |
| Answer» C. urea. | |
| 8234. |
__________ is a donor impurity for semi-conductors. |
| A. | Boron |
| B. | Antimony |
| C. | Gallium |
| D. | none of these |
| Answer» C. Gallium | |
| 8235. |
Carbon black is pulverised in a |
| A. | hammer crusher |
| B. | ball mill |
| C. | roll crusher |
| D. | gyratory crusher |
| Answer» C. roll crusher | |
| 8236. |
Use of grinding aids results in the |
| A. | enhanced production rate. |
| B. | finer products. |
| C. | both (a) & (b). |
| D. | neither (a) nor (b). |
| Answer» E. | |
| 8237. |
Percentage elongation of a material is a measure of its |
| A. | ductility |
| B. | brittleness |
| C. | toughness |
| D. | malleability |
| Answer» B. brittleness | |
| 8238. |
Chlorination of benzene is done to produce benzene hexachloride (a pesticide) in a photochemical reactor lined with |
| A. | karbate |
| B. | lead or glass |
| C. | fireclay bricks |
| D. | PVC |
| Answer» C. fireclay bricks | |
| 8239. |
Cermets are used for making |
| A. | cutting tools |
| B. | abrasives |
| C. | both (a) & (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 8240. |
__________ centrifuge is the most suitable for separation of non-friable crystals. |
| A. | Tubular bowl |
| B. | Disc-bowl |
| C. | Perforated horizontal basket continuous |
| D. | Suspended batch basket |
| Answer» D. Suspended batch basket | |
| 8241. |
The controlling resistance in a rotary drum vacuum filter is the __________ resistance. |
| A. | piping |
| B. | cake |
| C. | filter medium |
| D. | none of these |
| Answer» C. filter medium | |
| 8242. |
The main constituent of rock phosphate is |
| A. | mono-calcium phosphate |
| B. | di-calcium phosphate |
| C. | fluorspar |
| D. | none of these |
| Answer» C. fluorspar | |
| 8243. |
Monte catini process is a widely used process for the manufacture of |
| A. | urea |
| B. | calcium ammonium nitrate |
| C. | triple superposphate |
| D. | none of these |
| Answer» B. calcium ammonium nitrate | |
| 8244. |
P2O5 percentage in the phosphoric acid produced by wet process is about |
| A. | 10 |
| B. | 30 |
| C. | 50 |
| D. | 70 |
| Answer» C. 50 | |
| 8245. |
Which one of the following is used as a nitrogenous fertiliser, as a weed killer in the onion fields and for correcting acidic soils ? |
| A. | Urea |
| B. | CAN |
| C. | Ammonium sulphate |
| D. | Calcium cyanamide |
| Answer» E. | |
| 8246. |
Maximum stability of white phosphorous is at |
| A. | very high pressure |
| B. | atmospheric pressure |
| C. | room temperature |
| D. | >600 C |
| Answer» E. | |
| 8247. |
Speisses is a mixture of the following: |
| A. | Arsenides of heavy metals. |
| B. | Antimonides of heavy metals. |
| C. | Arsenides & antimonides of heavy metals. |
| D. | Iron, cobalt and nickel. |
| Answer» B. Antimonides of heavy metals. | |