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.
| 551. |
For infinite parallel planes having emissivities ε1 & ε2, the interchange factor for radiation from surface 1 to surface 2 is given by__________________? |
| A. | (ε1 + ε2)/ε1.ε2 |
| B. | ε1.ε2/(ε1 + ε2 – ε1.ε2) |
| C. | ε1.ε2 |
| D. | ε1 + ε2 |
| Answer» C. ε1.ε2 | |
| 552. |
For grinding of softer materials, the grinding wheel should have _________________ grain size ? |
| A. | Finer |
| B. | Coarser |
| C. | Medium |
| D. | Any type of |
| Answer» C. Medium | |
| 553. |
For efficient performance of a blast furnace, the extent of reduction of Wustite (FeO) should be___________________? |
| A. | 100% indirect reduction |
| B. | 100% direct reduction |
| C. | 50-60% indirect reduction |
| D. | 30-40% indirect reduction |
| Answer» D. 30-40% indirect reduction | |
| 554. |
For dynamic strain measurement, the Wheatstone bridge used is of ______________ type ? |
| A. | Voltage sensitive null |
| B. | Voltage sensitive deflected |
| C. | Current sensitive deflected |
| D. | None of these |
| Answer» C. Current sensitive deflected | |
| 555. |
For an ideal gas, Cp – Cv is____________________? |
| A. | R |
| B. | -R |
| C. | 0 |
| D. | (3/2) R |
| Answer» B. -R | |
| 556. |
For a spontaneous natural process at constant temperature and pressure, the free energy of the system always____________________? |
| A. | Increases |
| B. | Decreases |
| C. | Remain constant |
| D. | Increases to a maximum before decreasing |
| Answer» B. Decreases | |
| 557. |
For a small scale toy factory, the fixed cost per month is Rs. 5000/-. The variable cost per toy is Rs. 20 and sales price is Rs. 30 per toy. The break even production per month will be _________________ toys ? |
| A. | 250 |
| B. | 500 |
| C. | 1000 |
| D. | 3000 |
| Answer» C. 1000 | |
| 558. |
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 | |
| 559. |
Fog is an example of colloidal system of___________________? |
| A. | Solid dispersed in gas |
| B. | Solid dispersed in liquid |
| C. | Liquid dispersed in gas |
| D. | Gas dispersed in liquid |
| Answer» D. Gas dispersed in liquid | |
| 560. |
____________________ flux is used for the extraction of metal from its self fluxing ores? |
| A. | No |
| B. | Acid |
| C. | Basic |
| D. | Neutral |
| Answer» B. Acid | |
| 561. |
__________________ fluid force is not considered in the Navier-Stokes equation? |
| A. | Turbulent |
| B. | Viscous |
| C. | Gravity |
| D. | Pressure |
| Answer» B. Viscous | |
| 562. |
‘Flare tower’ used in industry is meant for_____________________? |
| A. | Venting off (after burning) the excess inflammable/toxic gases at high pressure |
| B. | Absorbing the pollutant gases from the furnace exhaust |
| C. | Cooling of furnace exhaust gases |
| D. | None of these |
| Answer» B. Absorbing the pollutant gases from the furnace exhaust | |
| 563. |
Fire refining process is employed in case of___________________? |
| A. | Tin |
| B. | Copper |
| C. | Zinc |
| D. | Aluminium |
| Answer» C. Zinc | |
| 564. |
Fine grained steels have____________________? |
| A. | High brittleness |
| B. | Higher tendency to distort |
| C. | High ductility |
| D. | None of these |
| Answer» D. None of these | |
| 565. |
Fibre glass is a composite material of_________________? |
| A. | Glass fibre in a polymer matrix |
| B. | Glass fibre in a metallic matrix |
| C. | Polymer fibre in a glassy matrix |
| D. | Both ‘b’ & ‘c’ |
| Answer» B. Glass fibre in a metallic matrix | |
| 566. |
Ferromagnetic materials owe their properties to __________________ inner sub-shells ? |
| A. | Completely filled |
| B. | Partially filled |
| C. | Equally filled |
| D. | Vacant |
| Answer» C. Equally filled | |
| 567. |
Fatigue resistance of a material is measured by the _____________________? |
| A. | Elastic limit |
| B. | Ultimate tensile strength |
| C. | Young’s modulus |
| D. | Endurance limit |
| Answer» E. | |
| 568. |
Faraday’s law of electrolysis is related to the____________________? |
| A. | Cation speed |
| B. | Atomic number of the cation |
| C. | Equivalent mass of the electrolyte |
| D. | None of these |
| Answer» D. None of these | |
| 569. |
Fahrenheit and Centigrade scales have the same readings at _____________________? |
| A. | -55° |
| B. | -40° |
| C. | -33° |
| D. | -58° |
| Answer» C. -33° | |
| 570. |
Factor of safety in machine design is defined as the ratio of ultimate stress to _____________ stress ? |
| A. | Working |
| B. | Bearing |
| C. | Yield |
| D. | None of these |
| Answer» B. Bearing | |
| 571. |
Exposure to _________________ accelerates the degradation of plastics? |
| A. | Ultraviolet radiation |
| B. | High atmospheric temperature |
| C. | High ambient temperature |
| D. | Damp atmosphere |
| Answer» B. High atmospheric temperature | |
| 572. |
Evaporative cooling process employs a combination of cooling and humidification in which the____________________? |
| A. | Sensible heat is added |
| B. | Sensible heat is removed and the latent heat is added |
| C. | Latent heat is removed |
| D. | Sensible heat is added and latent heat is removed |
| Answer» C. Latent heat is removed | |
| 573. |
Eutectoid composition of carbon steel at room temperature is___________________? |
| A. | Cementite |
| B. | Pearlite |
| C. | Martensite |
| D. | Ferrite |
| Answer» C. Martensite | |
| 574. |
Euler number is defined as the ratio of inertia force to _______________ force? |
| A. | Pressure |
| B. | Elastic |
| C. | Gravity |
| D. | Viscous |
| Answer» B. Elastic | |
| 575. |
Enzymes belong to the category of_____________________? |
| A. | Proteins |
| B. | Carbohydrates |
| C. | Vitamins |
| D. | Fats |
| Answer» B. Carbohydrates | |
| 576. |
Energy to be supplied to the radioactive nucleus for the emission of a neutron is ________________ MeV? |
| A. | 0.8 |
| B. | 7.8 |
| C. | 200 |
| D. | 10000 |
| Answer» B. 7.8 | |
| 577. |
Energy of the sun arises mainly from __________________ reactions? |
| A. | Fusion |
| B. | Fission |
| C. | Combustion |
| D. | None of these |
| Answer» B. Fission | |
| 578. |
“Encyclopaedia of Chemical Technology” has been ____________________? |
| A. | Authored by Kirk Othmer |
| B. | Edited by Perry and Chilton |
| C. | Edited by Kirk Othmer |
| D. | Authored by Perry and Chilton |
| Answer» D. Authored by Perry and Chilton | |
| 579. |
Elimination of brittleness resulting from welding of saw blades is done by __________________ of the welded portion ? |
| A. | Annealing |
| B. | Toughening |
| C. | Work hardening |
| D. | Tempering |
| Answer» B. Toughening | |
| 580. |
Electrostatic separation of minerals from each other is based on their differences in the following property ? |
| A. | Densities |
| B. | Magnetic permeabilities |
| C. | Electrical conductivities |
| D. | Hardness |
| Answer» D. Hardness | |
| 581. |
Electrometallurgy is not involved in the extraction of ___________________ from its ore? |
| A. | Aluminium |
| B. | Tin |
| C. | Lead |
| D. | Both B. & C. |
| Answer» E. | |
| 582. |
Electrometallurgical methods of metal extraction is normally used for those metals___________________? |
| A. | Whose oxide/ore is not reduced by carbon |
| B. | Which fall in the category of alkali & alkaline earth metals |
| C. | Which stands higher in the electrochemical series of the metal |
| D. | All A, B. & C. |
| Answer» E. | |
| 583. |
Electrolytic reduction cell used for conversion of calcined Al2O3 to Al is a carbon lined furnace operating at 800-900 °C. The purpose of electric current supplied to the furnace is to___________________? |
| A. | Achieve very high purity of aluminium (99.9%) |
| B. | Keep the electrolyte in liquid condition by the generation of heat |
| C. | Electrolytically dissociate alumina |
| D. | Both B. & C. |
| Answer» E. | |
| 584. |
Electrochemical corrosion can occur, only if ________________ is present in contact with metal? |
| A. | Air |
| B. | Oxygen |
| C. | Liquid medium |
| D. | Gaseous medium |
| Answer» D. Gaseous medium | |
| 585. |
Electrical conductivities of semi-conductors are of the order of ______________ ohm/cm ? |
| A. | 10-3 |
| B. | 103 |
| C. | 10-15 |
| D. | 1015 |
| Answer» B. 103 | |
| 586. |
Earing is a defect found in steels after the following metal working operation ? |
| A. | Extrusion |
| B. | Rolling |
| C. | Deep drawing |
| D. | Wire drawing |
| Answer» D. Wire drawing | |
| 587. |
During sensible heating of humid air__________________? |
| A. | Relative humidity increases |
| B. | Dew point remains constant |
| C. | Dry bulb & wet bulb temperature increases |
| D. | Both B & C |
| Answer» E. | |
| 588. |
During sensible cooling of air, its wet bulb temperature ? |
| A. | Decreases but dew point remains constant |
| B. | Increases but dew point remains constant |
| C. | Increases & the dew point decreases |
| D. | Decreases & the dew point increases |
| Answer» C. Increases & the dew point decreases | |
| 589. |
During decarburising of a plain carbon steel, the thickness of ferrite layer growth is proportional to____________________? |
| A. | Time |
| B. | Square root of time |
| C. | Square of time |
| D. | Cube of time |
| Answer» C. Square of time | |
| 590. |
Dryness fraction of dry steam is_________________? |
| A. | 0 |
| B. | ∞ |
| C. | 1 |
| D. | 0.5 |
| Answer» D. 0.5 | |
| 591. |
Dry saturated steam can be converted into super heated 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 | |
| 592. |
Drossing is a _______________________ operation? |
| A. | Smelting |
| B. | Dressing |
| C. | Roasting |
| D. | Dressing |
| Answer» D. Dressing | |
| 593. |
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 | |
| 594. |
Dislocation cross-slip is difficult in those materials, which have___________________? |
| A. | Large number of slip systems |
| B. | High work hardening rate |
| C. | Coarse grain size |
| D. | Low stacking fault energy |
| Answer» E. | |
| 595. |
Dislocations are _______________ defects? |
| A. | Point |
| B. | Line |
| C. | Volume |
| D. | None of these |
| Answer» C. Volume | |
| 596. |
Direct conversion of thermal energy to electrical energy is facilitated by the____________________? |
| A. | Fuel cells |
| B. | Photo voltaic cell |
| C. | Magneto hydrodynamic generator |
| D. | None of these |
| Answer» D. None of these | |
| 597. |
‘Dikes’ are low height walls made around the storage vessels meant for storing hazardous & inflammable material (e.g., petroleum products). Volume of dikes is equal to (where, V = volume of the storage vessel) ? |
| A. | V |
| B. | V/2 |
| C. | 2V |
| D. | 3V |
| Answer» B. V/2 | |
| 598. |
Diffusion co-efficient of a metal in a solid solution depends upon its ? |
| A. | Composition |
| B. | Temperature |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 599. |
Difference at any instant between the value of the controlled variable and the set point is called the__________________? |
| A. | Deviation |
| B. | Derivative time |
| C. | Error ratio |
| D. | Differential gap |
| Answer» B. Derivative time | |
| 600. |
Dies for wire drawing are generally made of__________________? |
| A. | Mild steel |
| B. | Stainless steel |
| C. | Carbides |
| D. | High carbon steel |
| Answer» B. Stainless steel | |