MCQOPTIONS
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MCQOPTIONS
This section includes 1175 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
*$_Which of the following pair is correctly matched?? |
| A. | Heat transfer: Thermal diffusivity |
| B. | Mass transfer: Diffusion co-efficient |
| C. | Momentum transfer: Kinematic viscosity |
| D. | All of the above |
| Answer» E. | |
| 202. |
*$_For preparation of porous bearings by powder metallurgy, preferred particle shape is? |
| A. | Spherical |
| B. | Nodular |
| C. | Irregular |
| D. | No preferred shape |
| Answer» B. Nodular | |
| 203. |
*$_Maximum carbon content in cast iron is __________ percent.? |
| A. | 3.8 |
| B. | 4 |
| C. | 4.3 |
| D. | 4.6 |
| Answer» D. 4.6 | |
| 204. |
*$_About __________ ton of coke is required in a cupola to produce one ton of casting.? |
| A. | 0.03 |
| B. | 0.3 |
| C. | 0.8 |
| D. | 1.5 |
| Answer» C. 0.8 | |
| 205. |
*$_The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe)? |
| A. | A |
| B. | D |
| C. | 1/A |
| D. | 1/A² |
| Answer» D. 1/A¬¨‚⧠| |
| 206. |
*$_The type of water filter normally employed/ preferred for treating small quantities of water in railway stations and individual industries is the __________ filter.? |
| A. | Rapid sand |
| B. | Pressure |
| C. | Gravity |
| D. | Slow sand |
| Answer» C. Gravity | |
| 207. |
*$_Air-petrol ratio in an automotive petrol engine is around? |
| A. | 14 : 1 |
| B. | 22 : 1 |
| C. | 25 : 1 |
| D. | 4 : 1 |
| Answer» B. 22 : 1 | |
| 208. |
*$_Ferromagnetic material owe their properties to __________ inner sub-shells.? |
| A. | Completely filled |
| B. | Partially filled |
| C. | Equally filled |
| D. | Vacant |
| Answer» C. Equally filled | |
| 209. |
*$_Usual value of the resistance suitable for a wire resistance strain gauge is __________ ohms.? |
| A. | 20 |
| B. | 80 |
| C. | 120 |
| D. | 500 |
| Answer» D. 500 | |
| 210. |
*$_A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm².? |
| A. | 6 |
| B. | 18 |
| C. | 38 |
| D. | 52 |
| Answer» C. 38 | |
| 211. |
*$_Device used as a standard for the calibration of pressure gauges is a? |
| A. | Bellow |
| B. | Diaphragm |
| C. | Dead weight pressure tester |
| D. | Mercury manometer |
| Answer» D. Mercury manometer | |
| 212. |
*$_Material having maximum density is? |
| A. | Plutonium |
| B. | Osmium |
| C. | Titanium |
| D. | Uranium |
| Answer» C. Titanium | |
| 213. |
*$_A solar cell converts the sunlight directly into __________ energy.? |
| A. | Thermal |
| B. | Electrical |
| C. | Mechanical |
| D. | Chemical |
| Answer» C. Mechanical | |
| 214. |
*$_The hardness of the lathe bed material is measured by the? |
| A. | Shore sceleroscope |
| B. | Brinnel hardness tester |
| C. | Vicker's hardness tester |
| D. | Rockwell hardness tester |
| Answer» B. Brinnel hardness tester | |
| 215. |
*$_For a first order chemical reaction, the concentration of the reactant decreases __________ with time.? |
| A. | Linearly |
| B. | Exponentially |
| C. | Logarithmically |
| D. | Inversely |
| Answer» B. Exponentially | |
| 216. |
*$_Carbon percentage in high speed steel tool material is 0.6 to 1.0. The hardness of carbon tool steels is increased, when it is alloyed with? |
| A. | Vanadium & chromium |
| B. | Silicon |
| C. | Tungsten |
| D. | Manganese |
| Answer» B. Silicon | |
| 217. |
*$_Which of the following exemplifies resemblence with the extrusion process ?? |
| A. | Pneumatic ejection of abrasive solid particles through a nozzle |
| B. | Toothpaste pouring out of the tube |
| C. | Ejection of abrasive slurry through an opening |
| D. | Viscous lubricant pouring out through its container's mouth |
| Answer» C. Ejection of abrasive slurry through an opening | |
| 218. |
*$_Thermal expansion of solid is employed in the temperature measurement by a? |
| A. | Bimetallic thermometer |
| B. | Thermocouple |
| C. | Mercury thermometer |
| D. | Resistance thermometer |
| Answer» B. Thermocouple | |
| 219. |
*$_Paint spray gun works on the principle of? |
| A. | Bernoulli's theorem |
| B. | Boyle's law |
| C. | Newton's law of viscosity |
| D. | None of these |
| Answer» B. Boyle's law | |
| 220. |
*$_Carbon is present in the form of __________ in grey cast iron.? |
| A. | Spheroids |
| B. | Nodular aggregates of graphite |
| C. | Flakes |
| D. | Cementite |
| Answer» D. Cementite | |
| 221. |
*$_Reduction reaction involves the? |
| A. | Loss of electrons |
| B. | Increase in oxidation number |
| C. | Gain of electrons |
| D. | Addition of oxygen |
| Answer» D. Addition of oxygen | |
| 222. |
*$_Which of the following properties of a solid is not dependent on crystal imperfection ?? |
| A. | Ductility |
| B. | Semiconductiyity |
| C. | Melting point |
| D. | Yield stress |
| Answer» D. Yield stress | |
| 223. |
*$_Metallic surveying tapes are made of __________ which has a low co-efficient of expansion & enough strength.? |
| A. | Invar |
| B. | Hastealloy |
| C. | Duralumin |
| D. | Monel metal |
| Answer» B. Hastealloy | |
| 224. |
*$_At the point of boundary layer separation in fluid flow, the? |
| A. | Shear stress is maximum |
| B. | Velocity gradient is flat |
| C. | Density variation is maximum |
| D. | Shear stress is zero |
| Answer» B. Velocity gradient is flat | |
| 225. |
*$_Insulation of liquid surface can be achieved by __________ on top of its surface.? |
| A. | Floating hollow polypropylene spheres |
| B. | Spraying alumina powder |
| C. | Putting cement |
| D. | None of these |
| Answer» B. Spraying alumina powder | |
| 226. |
*$_The majority charge carriers in p-type silicon are? |
| A. | Free electrons |
| B. | Ions |
| C. | Conduction electrons |
| D. | Holes |
| Answer» E. | |
| 227. |
*$_Annealing of cast iron? |
| A. | Softens it to facilitate machining |
| B. | Decreases the free carbon |
| C. | Increases the strength |
| D. | None of these |
| Answer» B. Decreases the free carbon | |
| 228. |
*$___________ rubber is generally used for making 'O' rings used for vacuum sealings.? |
| A. | Natural |
| B. | Neoprene |
| C. | Butadiene |
| D. | Nitrile |
| Answer» C. Butadiene | |
| 229. |
*$_The escape velocity of a body on earth which is independent of its mass is about __________ km/second.? |
| A. | 3 |
| B. | 7 |
| C. | 11 |
| D. | 15 |
| Answer» D. 15 | |
| 230. |
*$_Annealing ofwhite cast iron produces __________ iron.? |
| A. | Grey |
| B. | Nodular |
| C. | Malleable |
| D. | Spheroidal |
| Answer» D. Spheroidal | |
| 231. |
*$_The magnitude of water hammer caused in pipe flow is independent of the? |
| A. | Pipe length |
| B. | Fluid flow stoppage rate |
| C. | Fluid temperature |
| D. | Time of valve closure |
| Answer» D. Time of valve closure | |
| 232. |
*$_Propulsion of rocket follows from the? |
| A. | Newton's second law of motion |
| B. | Newton's third law of motion |
| C. | Law of projectiles |
| D. | Archimedes principle |
| Answer» C. Law of projectiles | |
| 233. |
*$_Filler metal is used in __________ welding.? |
| A. | Braze |
| B. | Electric spot |
| C. | Projection |
| D. | Seam |
| Answer» B. Electric spot | |
| 234. |
*$_What is the pH of distilled water?? |
| A. | 0 |
| B. | 1 |
| C. | 7 |
| D. | 14 |
| Answer» D. 14 | |
| 235. |
*$_Which of the following is not a dielectric material?? |
| A. | Cotton, silk and paper |
| B. | Asbestos, glass, porcelain and mica |
| C. | Rubber and polymeric resins |
| D. | All of the above |
| Answer» D. All of the above | |
| 236. |
*$_Magnesium is present in? |
| A. | Haemoglobin |
| B. | Chlorophyll |
| C. | Hypo solution |
| D. | None of these |
| Answer» C. Hypo solution | |
| 237. |
*$_Work hardenable alloy steel used to make the bucket wheel excavators, blades of bulldozers and other earth moving equipments contain iron, carbon and? |
| A. | Manganese |
| B. | Silicon |
| C. | Nickel |
| D. | Chromium |
| Answer» B. Silicon | |
| 238. |
*$___________ is the hardest material out of the following.? |
| A. | Boron carbide |
| B. | Tungsten carbide |
| C. | Hardened steel |
| D. | Silicon carbide |
| Answer» B. Tungsten carbide | |
| 239. |
*$_Which set of materials is used as a moderator in nuclear reactor?? |
| A. | Zircalloy & berrylium |
| B. | Zircalloy & heavy water |
| C. | Zirconium & berrylium |
| D. | Heavy water & berrelium |
| Answer» E. | |
| 240. |
*$_Methyl orange indicator turns? |
| A. | Orange yellow in alkaline medium |
| B. | Orange yellow in acidic medium |
| C. | Colourless in acidic medium |
| D. | Colourless in basic medium |
| Answer» B. Orange yellow in acidic medium | |
| 241. |
*$_In TIG welding, thoriated tungsten electrodes are used, because it? |
| A. | Has higher current carraying capacity |
| B. | Has better electron emissivity |
| C. | Is stronger than ordinary tungsten |
| D. | Is easy to prepare |
| Answer» C. Is stronger than ordinary tungsten | |
| 242. |
*$_Which of the following is a commonly used manometric liquid for low pressure range?? |
| A. | Ethyl alcohol |
| B. | Carbon tetrachloride |
| C. | Glycerol |
| D. | Ethylene glycol |
| Answer» C. Glycerol | |
| 243. |
*$_In troposphere (the weather domain), the temperature 't' at height 'h' above the sea level in metres is given by (where, temperature at sea level is 15°C and t is in °C.)? |
| A. | T = 15 - 0.0065 h |
| B. | T = 15 + 0.0065 h |
| C. | T = 0.0035 h - 15 |
| D. | T = 15 - 0.0035 h |
| Answer» B. T = 15 + 0.0065 h | |
| 244. |
*$_Which of the following has rotten eggy smell?? |
| A. | Hydrogen sulphide |
| B. | Styrene |
| C. | Phenol |
| D. | Dimethyl amine |
| Answer» B. Styrene | |
| 245. |
*$_Large diameter reinforced cement concrete (RCC) pipes are generally joined by __________ joint.? |
| A. | Flanged iron |
| B. | Collar |
| C. | Flexible |
| D. | Expansion |
| Answer» C. Flexible | |
| 246. |
*$_A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalant bonds resulting in __________ electrons.? |
| A. | Lack of free |
| B. | Excess of |
| C. | Decrease in |
| D. | None of these |
| Answer» C. Decrease in | |
| 247. |
*$_Which is the most suitable joint for the pipes, with are laid submerged under water, where the bottom of the river bed is uneven?? |
| A. | Collar joint |
| B. | Flexible joint |
| C. | Flanged joint |
| D. | Expansion joint |
| Answer» C. Flanged joint | |
| 248. |
*$_Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans ?? |
| A. | Emissivity of pipe surface |
| B. | Diameter & length of the pipe |
| C. | Temperature of hot pipe surface & that of air in the room |
| D. | None of these |
| Answer» E. | |
| 249. |
*$_The product out from a cupola is called? |
| A. | Wrought iron |
| B. | Pig iron |
| C. | Cast iron |
| D. | None of these |
| Answer» D. None of these | |
| 250. |
*$_Ganister contains maximum percentage of? |
| A. | FeO |
| B. | SiO‚ÇÇ |
| C. | MgO |
| D. | MnO‚ÇÇ |
| Answer» C. MgO | |