MCQOPTIONS
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MCQOPTIONS
This section includes 2253 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 2201. |
Iron has got __________ isotopes. |
| A. | no |
| B. | four |
| C. | three |
| D. | two |
| Answer» C. three | |
| 2202. |
Mechanism/phenomenon involved in the improvement of fatigue strength of a material by shot peening is the |
| A. | induction of residual compressive stress on the surface. |
| B. | removal of stress concentration from the surface. |
| C. | grain refinement. |
| D. | surface polishing. |
| Answer» B. removal of stress concentration from the surface. | |
| 2203. |
With increase in temperature, the electrical conductivity of a __________ decreases. |
| A. | semi-conductor |
| B. | metal or alloy |
| C. | dielectric |
| D. | none of these |
| Answer» B. metal or alloy | |
| 2204. |
A freely floating object is stable, if its centre of buoyancy |
| A. | coincides with its centre of gravity. |
| B. | lies below its centre of gravity. |
| C. | lies below its metacentre. |
| D. | none of these. |
| Answer» B. lies below its centre of gravity. | |
| 2205. |
Dephosphorisation of molten pig iron is favoured by |
| A. | oxidising and basic slag. |
| B. | reducing and basic slag. |
| C. | high activity co-efficient of phosphorous in metal. |
| D. | oxidising and neutral slag. |
| Answer» C. high activity co-efficient of phosphorous in metal. | |
| 2206. |
What is the range of tempering temperature (°C) for most of the materials ? |
| A. | 75-100 |
| B. | 200-300 |
| C. | 350-450 |
| D. | 500-600 |
| Answer» C. 350-450 | |
| 2207. |
Heat flow across a hollow sphere of inner radius 'r1' and outer radius 'r2' is directly proportional to |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» C. | |
| 2208. |
Thermit welding is categorised as the __________ welding. |
| A. | forge |
| B. | fusion |
| C. | resistance |
| D. | arc |
| Answer» C. resistance | |
| 2209. |
Ganister contains maximum percentage of |
| A. | FeO |
| B. | SiO2 |
| C. | MgO |
| D. | MnO2 |
| Answer» C. MgO | |
| 2210. |
Tempering of a material does not improve its |
| A. | machinability |
| B. | toughness |
| C. | internal stress level |
| D. | softness |
| Answer» B. toughness | |
| 2211. |
In the acid Bessemer process, the hot metal should have the following com-positon. |
| A. | S < 0.05% and P < 0.05%. |
| B. | S < 0.05% and P < 1.5%. |
| C. | S < 0.05% and P > 1.5%. |
| D. | S > 1.5% and P < 0.05%. |
| Answer» B. S < 0.05% and P < 1.5%. | |
| 2212. |
__________ remains constant during the adiabatic cooling of moist air. |
| A. | Wet bulb temperature |
| B. | Dry bulb temperature |
| C. | Relative humidity |
| D. | Specific humidity |
| Answer» B. Dry bulb temperature | |
| 2213. |
In electrical resistance welding, distortion results from the use of improper |
| A. | clamping methods |
| B. | electrodes |
| C. | current |
| D. | filler material |
| Answer» B. electrodes | |
| 2214. |
Diamagnetic materials |
| A. | are magnetised by eddy currents only. |
| B. | are non-magnetic and can not be magnetised. |
| C. | are magnetised in direction opposite to the magnetic field. |
| D. | can be magnetised in one direction only. |
| Answer» D. can be magnetised in one direction only. | |
| 2215. |
Powder metallurgy process does not make metal powder by |
| A. | atomisation |
| B. | grinding/milling |
| C. | hammering |
| D. | electrolytic deposition |
| Answer» D. electrolytic deposition | |
| 2216. |
Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as |
| A. | Gr0.25, Gr |
| B. | Gr0.25, Gr0.33 |
| C. | Gr, Gr0.25 |
| D. | Gr0.33, Gr0.25 |
| Answer» B. Gr0.25, Gr0.33 | |
| 2217. |
Addition of beryllium to copper is done mainly to produce a/an __________ alloy. |
| A. | non-sparking & non-magnetic |
| B. | high strength |
| C. | precipitation hardenable |
| D. | corrosion resistant |
| Answer» B. high strength | |
| 2218. |
In the formation of cermets, the ratio of ceramic material to metallic material is usually 80:20. Which of the following is a cermet ? |
| A. | Zirconia |
| B. | Alumina |
| C. | Bakelite |
| D. | Tungsten carbide |
| Answer» E. | |
| 2219. |
Friction factor for fluid flow in pipe does not depend upon the |
| A. | pipe length. |
| B. | pipe roughness. |
| C. | fluid density & viscosity. |
| D. | mass flow rate of fluid. |
| Answer» B. pipe roughness. | |
| 2220. |
The function of neutral flux used in the pyrometallurgy of metal extraction is to increase the __________ of the slag. |
| A. | fluidity |
| B. | basicity |
| C. | acidity |
| D. | viscosity |
| Answer» B. basicity | |
| 2221. |
Out of the following substances, one ton of __________ will store the maximum heat for a rise of 30°C in temperature. |
| A. | steel |
| B. | lignite |
| C. | water |
| D. | lime stone |
| Answer» D. lime stone | |
| 2222. |
Annealing ofwhite cast iron produces __________ iron. |
| A. | grey |
| B. | nodular |
| C. | malleable |
| D. | spheroidal |
| Answer» D. spheroidal | |
| 2223. |
Sewage is not an excellent medium for the growth of |
| A. | aquatic creatures. |
| B. | protozoa. |
| C. | virus. |
| D. | pathogenic bacteria. |
| Answer» B. protozoa. | |
| 2224. |
A solution which resists change in its pH value on addition of acid/alkali is called the __________ solution. |
| A. | neutral |
| B. | ideal |
| C. | buffer |
| D. | zero pH |
| Answer» D. zero pH | |
| 2225. |
Tin based white metals are used, where bearings are subjected to |
| A. | high pressure & load. |
| B. | low pressure & load. |
| C. | high temperature. |
| D. | large surface wear. |
| Answer» B. low pressure & load. | |
| 2226. |
Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an __________ body. |
| A. | grey |
| B. | black |
| C. | opaque |
| D. | white |
| Answer» B. black | |
| 2227. |
Tin plated iron and galvanised iron are generally produced by |
| A. | vaporising |
| B. | hot dipping |
| C. | electroplating |
| D. | spraying |
| Answer» C. electroplating | |
| 2228. |
Maraging steels derive their strength from the following mechanism: |
| A. | A fine, highly dislocated and strong martensite. |
| B. | Fine dispersions of intermetallics of Fe, Ni, Ti etc. |
| C. | Fine dispersions of alloy carbides in a ferrite matrix. |
| D. | Fine dispersions of Fe3 C nucleated on dislocations in austenite. |
| Answer» B. Fine dispersions of intermetallics of Fe, Ni, Ti etc. | |
| 2229. |
Transition from laminar to turbulent zone in free convection heat transfer is governed by the critical value of |
| A. | Grashoff number. |
| B. | Grashoff number & Reynolds number. |
| C. | Reynolds number. |
| D. | Grashoff number & Prandtl number. |
| Answer» E. | |
| 2230. |
Gross national product (GNP) means the total value of __________ in a country. |
| A. | goods produced |
| B. | gold reserve |
| C. | earning of the citizens |
| D. | taxes paid |
| Answer» B. gold reserve | |
| 2231. |
Toughness of a material is measured by the |
| A. | Vicker's hardness test. |
| B. | scratch test. |
| C. | universal testing machine. |
| D. | notched bar test. |
| Answer» D. notched bar test. | |
| 2232. |
In troposphere (the weather domain), the temperature 't' at height 'h' above the sea level in metres is given by (where, temperature at sea level is 15°C and t is in °C.) |
| A. | t = 15 - 0.0065 h |
| B. | t = 15 + 0.0065 h |
| C. | t = 0.0035 h - 15 |
| D. | t = 15 - 0.0035 h |
| Answer» B. t = 15 + 0.0065 h | |
| 2233. |
The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used. For general purpose cutter grinding __________ grinding wheel is normally used. |
| A. | hard |
| B. | soft |
| C. | silicon carbide |
| D. | aluminium oxide |
| Answer» E. | |
| 2234. |
Addition of __________ to steel does not impart hardness. |
| A. | nickel |
| B. | copper |
| C. | chromium |
| D. | silicon |
| Answer» C. chromium | |
| 2235. |
Stainless steel is welded with difficulty because of |
| A. | its high melting temperature. |
| B. | chances of cracking. |
| C. | oxide film formation. |
| D. | chromium carbide formation. |
| Answer» D. chromium carbide formation. | |
| 2236. |
In chemical dehumidification process |
| A. | wet bulb temperature increases. |
| B. | dry bulb temperature remains constant. |
| C. | dew point temperature increases. |
| D. | dry bulb temperature increases. |
| Answer» C. dew point temperature increases. | |
| 2237. |
In extrusion of metals, which of the following statement is true ? |
| A. | speed of the extruded material is same as that of ram speed. |
| B. | Redundant work is a function of the die angle. |
| C. | Relative motion between the billet surface and the container wall is always present. |
| D. | Hollow ram is used for indirect extrusion. |
| Answer» E. | |
| 2238. |
Coating provided on the electrodes used in the arc welding is not expected to |
| A. | add alloying elements. |
| B. | prevent electrode from contamination. |
| C. | stabilise the arc. |
| D. | provide protective atmosphere to weld. |
| Answer» C. stabilise the arc. | |
| 2239. |
Which of the following is capable of acting both as an acid flux as well as a basic flux in the metal extraction from its ore ? |
| A. | Silica |
| B. | Lime |
| C. | Alumina |
| D. | Fluorite |
| Answer» D. Fluorite | |
| 2240. |
LVDT used for displacement measurement is a/an __________ transducer. |
| A. | passive |
| B. | active |
| C. | capacitive |
| D. | none of these |
| Answer» B. active | |
| 2241. |
Yield strength of a material is determined by the __________ test. |
| A. | creep |
| B. | tension |
| C. | compression |
| D. | endurance |
| Answer» C. compression | |
| 2242. |
Fluorine is not a constituent of |
| A. | freon |
| B. | chloroform |
| C. | teflon |
| D. | fluorocarbons |
| Answer» C. teflon | |
| 2243. |
The following type of bonding is strongly directional in solids. |
| A. | Vander Waal's |
| B. | Ionic |
| C. | Metallic |
| D. | Covalant |
| Answer» E. | |
| 2244. |
Area under the stress-strain curve upto the __________ is referred to as the modulus of resilience. |
| A. | yield strength |
| B. | elastic limit |
| C. | proportional limit |
| D. | maximum point |
| Answer» D. maximum point | |
| 2245. |
Earing is a defect found in steels after the following metal working operation (s). |
| A. | Deep drawing |
| B. | Rolling |
| C. | Extrusion |
| D. | Wire drawing |
| Answer» B. Rolling | |
| 2246. |
With increase in carbon percentage in steel, its |
| A. | yield stress decreases. |
| B. | elongation percent increases. |
| C. | tensile strength increases. |
| D. | impact strength increases. |
| Answer» D. impact strength increases. | |
| 2247. |
Which of the following is a boiler accessory i.e., not a boiler mounting ? |
| A. | Blow off cock |
| B. | Feed check valve |
| C. | Feed water pump |
| D. | Stop valve |
| Answer» D. Stop valve | |
| 2248. |
Adhesives |
| A. | can't be used in the form of pressure sensitive tapes. |
| B. | can't join two dissimilar metals. |
| C. | cure instantaneously after application on a surface. |
| D. | none of these. |
| Answer» E. | |
| 2249. |
The instrument based on the following principle is used for the measurement of oxygen only in the flue gases. |
| A. | Chemical absorption. |
| B. | Thermal conductivity. |
| C. | Infrared absorption. |
| D. | Paramagnetism. |
| Answer» E. | |
| 2250. |
All of the following alloying elements of steel increases hardness but sacrifice ductility, except |
| A. | nickel |
| B. | vanadium |
| C. | molybdenum |
| D. | chromium |
| Answer» B. vanadium | |