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.
| 251. |
*$_Which is the most lethal weapon ?? |
| A. | Atom (fusion) bomb |
| B. | Hydrogen bomb |
| C. | Cobalt bomb |
| D. | Neutron bomb |
| Answer» D. Neutron bomb | |
| 252. |
*$_The taper provided on pattern for its easy & clean withdrawal from the mould is termed as the __________ allowance.? |
| A. | Casting |
| B. | Pattern |
| C. | Draft |
| D. | Distoration |
| Answer» D. Distoration | |
| 253. |
*$_Ceramic materials are? |
| A. | Organic in nature |
| B. | Stronger in compression than in tension |
| C. | Always amorphous in nature |
| D. | Always bad heat conductors |
| Answer» C. Always amorphous in nature | |
| 254. |
*$_Ceramic compounds as compared to metallic compounds? |
| A. | Crystallise faster |
| B. | Resist greater tensile stress at room temperature |
| C. | Have higher melting temperature |
| D. | Are better conductor of electricity at higher temperature |
| Answer» D. Are better conductor of electricity at higher temperature | |
| 255. |
*$_Nickel is a __________ material.? |
| A. | Ferromagnetic |
| B. | Semi-conductor |
| C. | Paramagnetic |
| D. | Ferroelectric |
| Answer» B. Semi-conductor | |
| 256. |
*$_When water is sprayed on air, passing through an insulated chamber maintained at a temperature higher than the dew point of entering air but lower than its dry bulb temperature, then the air is? |
| A. | Cooled and dehumified |
| B. | Heated and humidified |
| C. | Cooled and humidified |
| D. | Heated and dehumidified |
| Answer» D. Heated and dehumidified | |
| 257. |
*$_Blast furnace is a? |
| A. | Counter current reactor |
| B. | Co-current reactor |
| C. | Cross-current reactor |
| D. | Combination of all the three |
| Answer» B. Co-current reactor | |
| 258. |
*$_Unit molar solution of __________ is the best conductor of electricity.? |
| A. | Sodium chloride |
| B. | Acetic acid |
| C. | Sulphuric acid |
| D. | Sucrose |
| Answer» D. Sucrose | |
| 259. |
*$_Streaklines, streamlines & pathlines are almost identical for __________ fluid flow.? |
| A. | Ideal |
| B. | Uniform |
| C. | Steady |
| D. | None of these |
| Answer» D. None of these | |
| 260. |
*$_Screws are specified by their __________ diameters.? |
| A. | Minor |
| B. | Major |
| C. | Pitch |
| D. | None of these |
| Answer» C. Pitch | |
| 261. |
*$_With increase in pressure, the saturation temperature of steam? |
| A. | Increases rapidly first and then slowly |
| B. | Increases slowly first and then rapidly |
| C. | First increases and then decreases |
| D. | None of these |
| Answer» B. Increases slowly first and then rapidly | |
| 262. |
*$_A material is capable of resisting softening at high temperature, because of its property termed as? |
| A. | Hot temper |
| B. | Hot hardness |
| C. | Fatigue |
| D. | Creep |
| Answer» C. Fatigue | |
| 263. |
*$_While the bin cards are used in the effective stores management, the queing theory is associated with the __________ time.? |
| A. | Waiting |
| B. | Idle |
| C. | Inspection |
| D. | Tool replacement |
| Answer» B. Idle | |
| 264. |
*$_Austempering process results in the formation of __________ structure.? |
| A. | Martensitic |
| B. | Bainitic |
| C. | Carburised |
| D. | Stressed |
| Answer» C. Carburised | |
| 265. |
*$_Most of the phosphorous present in the blast furnace burden enters into? |
| A. | Hot metal |
| B. | Flue gases |
| C. | Slag |
| D. | Refractory lining |
| Answer» B. Flue gases | |
| 266. |
*$_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 | |
| 267. |
*$_Quartz is a __________ material.? |
| A. | Diamagnetic |
| B. | Ferromagnetic |
| C. | Ferroelectric |
| D. | Piezoelectric |
| Answer» E. | |
| 268. |
*$_Particle nature of cathode rays is proved due to the fact that they? |
| A. | Travel in a straight line |
| B. | Get deflected by magnetic electric field |
| C. | Produce fluorescence |
| D. | Heat the exposed material |
| Answer» C. Produce fluorescence | |
| 269. |
*$_Sudden immersion/dipping of red hot steel bar in water makes it? |
| A. | Malleable & tough |
| B. | Ductile & soft |
| C. | Brittle & hard |
| D. | None of these |
| Answer» D. None of these | |
| 270. |
*$_Basic open hearth furnace (BOF) is not used for producing __________ steel.? |
| A. | Killed |
| B. | Rimming |
| C. | High alloy |
| D. | None of these |
| Answer» D. None of these | |
| 271. |
*$_Increase in the entropy of a system represents the? |
| A. | Degradation of energy |
| B. | Decrease in system pressure |
| C. | Increase in the availability of energy |
| D. | Increase in the temperature |
| Answer» B. Decrease in system pressure | |
| 272. |
*$_Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about? |
| A. | 9:1 |
| B. | 17 : 1 |
| C. | 23 : 1 |
| D. | 29 : 1 |
| Answer» C. 23 : 1 | |
| 273. |
*$_Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as? |
| A. | Gr0.25, Gr |
| B. | Gr0.25, Gr0.33 |
| C. | Gr, Gr0.25 |
| D. | Gr0.33, Gr0.25 |
| Answer» B. Gr0.25, Gr0.33 | |
| 274. |
*$_Filler material used in welding having the lowest melting point out of the following is? |
| A. | Aluminium |
| B. | Soft solder |
| C. | Silver solder |
| D. | Brazing spelter |
| Answer» C. Silver solder | |
| 275. |
*$_Wohler test is a destructive test to find out the __________ strength of a prepared metal specimen.? |
| A. | Creep |
| B. | Fatigue |
| C. | Endurance |
| D. | Tensile |
| Answer» C. Endurance | |
| 276. |
*$_The basic function of the drum in a boiler is to? |
| A. | Act as a storage for feed water |
| B. | Act as a storage for steam |
| C. | Separate steam from water |
| D. | Remove settling impurities from steam |
| Answer» D. Remove settling impurities from steam | |
| 277. |
*/*_A compact estimate about the amount of materials handling between various work stations is obtained from the? |
| A. | Gantt chart |
| B. | Bin chart |
| C. | String diagram |
| D. | Travel chart |
| Answer» E. | |
| 278. |
*/*_The most important consideration, while designing the refrigeration system of an aircraft is that the refrigeration system? |
| A. | Is as light as possible |
| B. | Has very high C.O.P |
| C. | Employs minimum quantity of refrigerant |
| D. | Consumer minimum horse power |
| Answer» B. Has very high C.O.P | |
| 279. |
*/*_Austempering of steel requires.it to be heated to 875°C followed by sudden cooling to 250-525°C, thereby changing austenite to? |
| A. | Sorbite |
| B. | Bainite |
| C. | Martensite |
| D. | Troostite |
| Answer» C. Martensite | |
| 280. |
*/*_Air standard Otto cycle is more efficient than the diesel cycle for the same? |
| A. | Heat addition & compression ratio |
| B. | Heat addition & pressure |
| C. | Compression ratio & pressure |
| D. | Cylinder dimension & rpm |
| Answer» B. Heat addition & pressure | |
| 281. |
*/*_Boiler draught of 10 mm water column is equivalent to? |
| A. | 1 kgf/m² |
| B. | 10 kgf/m² |
| C. | 10 kgf/mm² |
| D. | 1 kgf/mm² |
| Answer» C. 10 kgf/mm¬¨‚⧠| |
| 282. |
*/*_Sub zero treatment of steel is done to? |
| A. | Suppress martensite transformation |
| B. | Enhance its working performance in sub zero atmosphere |
| C. | Reduce the retained austenite in hardened steel |
| D. | Induce temper brittleness after its hardening |
| Answer» D. Induce temper brittleness after its hardening | |
| 283. |
*/*_If the head is doubled in & centrifugal pump, the power required will increase in the ratio of? |
| A. | 23 |
| B. | 23/2 |
| C. | 25/2 |
| D. | 21/3 |
| Answer» C. 25/2 | |
| 284. |
*/*_The phenomenon occurring during explosion of a hydrogen bomb is? |
| A. | Nuclear fission |
| B. | Nuclear fusion |
| C. | A combination of both nuclear fission & fusion |
| D. | None of these |
| Answer» D. None of these | |
| 285. |
*/*_Shampoos are commercially not available in the form of? |
| A. | Powder |
| B. | Gaseous mixture |
| C. | Solution |
| D. | Emulsion |
| Answer» C. Solution | |
| 286. |
*/*_Which of the following is a permanent fastening?? |
| A. | Rivets |
| B. | Bolts |
| C. | Screws |
| D. | Keys |
| Answer» B. Bolts | |
| 287. |
*/*_Wrought iron does not have the? |
| A. | Uniform strength in all directions |
| B. | Ability to hold protective coating |
| C. | High ductility & corrosion resistance |
| D. | Easily weldable characteristics |
| Answer» B. Ability to hold protective coating | |
| 288. |
*/*_A floating body oscillates about its __________ when it is displaced slightly.? |
| A. | Centre of gravity |
| B. | Metacentre |
| C. | Centre of buoyancy |
| D. | Centre of pressure |
| Answer» C. Centre of buoyancy | |
| 289. |
*/*_Limestone is added in the blast furnace (during pig iron manufacture) to? |
| A. | Form slag by combining with impurities |
| B. | Supply heat by undergoing exothermic reaction with impurities |
| C. | Reduce the coke consumption |
| D. | Reduce slag viscosity |
| Answer» B. Supply heat by undergoing exothermic reaction with impurities | |
| 290. |
*/*_If the pH value of a solution of sodium chloride is 7; then what will be the pH value of the solution after its electrolysis ?? |
| A. | 7 |
| B. | < 7 |
| C. | > 7 |
| D. | 0 |
| Answer» D. 0 | |
| 291. |
*/*_Function of blow down valve in a boiler is to? |
| A. | Maintain the drum level |
| B. | Keep the drum pressure constant |
| C. | Drain out the sludge from the drum |
| D. | Empty the boiler during shutdown |
| Answer» D. Empty the boiler during shutdown | |
| 292. |
*/*_A reduction in thermal resistance during heat transfer does not occur in the? |
| A. | Convection heat transfer by stirring the fluid and cleaning the heating surface |
| B. | Conduction heat transfer by reduction in the material thickness and increase in the thermal conductivity |
| C. | Radiation heat transfer by increasing the temperature and reducing the emis-sivity |
| D. | None of these |
| Answer» D. None of these | |
| 293. |
*/*_The gases used in the treatment of asthma is a mixture of __________ and oxygen.? |
| A. | Helium |
| B. | Argon |
| C. | Neon |
| D. | None of these |
| Answer» B. Argon | |
| 294. |
*/*_Material of construction of foundary crucible is? |
| A. | Lead |
| B. | Stainless steel |
| C. | Graphite |
| D. | Cast iron |
| Answer» D. Cast iron | |
| 295. |
*/*_A steam pipe is intended to be insulated with two layers of insulating materials of different thermal conductivities. For minimum heat transfer to take place? |
| A. | The better insulation material should be put just next to pipe (i.e., inside) |
| B. | The better insulating material should be put outside |
| C. | Either of the insulating material could be put on either side |
| D. | Steam temperature is considered before deciding as to which insulating material is to be put inside (i.e., just next to the pipe) |
| Answer» B. The better insulating material should be put outside | |
| 296. |
*/*_Superheated vapour behaves like? |
| A. | Dry steam |
| B. | Gas approximately |
| C. | An ordinary vapor |
| D. | None of these |
| Answer» C. An ordinary vapor | |
| 297. |
*/*_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 | |
| 298. |
*/*_Transformation range for ferrous material is the temperature interval during which __________ is formed during its heating.? |
| A. | Cementite |
| B. | Austenite |
| C. | Martensite |
| D. | Pearlite |
| Answer» C. Martensite | |
| 299. |
*/*_With increase in steam pressure, its specific volume decreases? |
| A. | Rapidly first and then slowly |
| B. | Linearly |
| C. | Slowly first and then rapidly |
| D. | Exponentially |
| Answer» B. Linearly | |
| 300. |
*/*_Which of the following contributes maximum as main source of sulphur in the blast furnace charge ?? |
| A. | Sinter |
| B. | Coke |
| C. | Iron ore |
| D. | Limestone |
| Answer» C. Iron ore | |