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.
| 801. |
_For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm³) while the C.V. is same on weight basis (i.e., kcal/kg) ?$? |
| A. | Propane and acetylene |
| B. | Propane and LPG |
| C. | Sewage gas and gobar gas |
| D. | B.F gas and coke oven gas |
| Answer» E. | |
| 802. |
_The most serious manufacturing defect from fracture toughness point of view is$? |
| A. | Surface roughness |
| B. | Pores |
| C. | Spherical inclusion |
| D. | Crack |
| Answer» E. | |
| 803. |
_Which of the following does not discharge the dust collected as a dry solid?$? |
| A. | Electrostatic precipitator |
| B. | Wet scrubber |
| C. | Bag filter |
| D. | Gravity settling chamber |
| Answer» C. Bag filter | |
| 804. |
_The quantity of electricity required to deposit one gm equivalent of any substance is one$? |
| A. | Ampere |
| B. | Coulomb |
| C. | Microfaraday |
| D. | Faraday |
| Answer» E. | |
| 805. |
_The temperature at which ferromagnetic material can no longer be magnetised by the outside forces, is termed as the$? |
| A. | Critical point |
| B. | Curie temperature |
| C. | Inversion temperature |
| D. | Eutectic temperature |
| Answer» C. Inversion temperature | |
| 806. |
_FeO (s) + CO (g) = Fe (s) + CO‚ÇÇ (g), k = 0. 435 at 1173E; At equilibrium, what will be the number of moles of CO gas required to reduce one mole of FeO at 1173 K?$? |
| A. | 1.0 |
| B. | 1.3 |
| C. | 2.3 |
| D. | 3.3 |
| Answer» E. | |
| 807. |
_Plastics as a material of construction suffer from the drawback of low$? |
| A. | Machinability |
| B. | Density |
| C. | Strength |
| D. | Plastic deformation |
| Answer» D. Plastic deformation | |
| 808. |
_In fluid flow, and heat and mass transfer, one encounters (i) kinematic velocity (μ), (ii) molecular diffusivity (θ) and thermal diffusivity (α). The units of these quantities are.$? |
| A. | μ , α and θ all have units of m/s |
| B. | μ , α and θ all have units of m²/s |
| C. | α and θ have units of m²/s, while μ has unit of m/s |
| D. | α and θ have units of m/s, while μ has unit of m²/s |
| Answer» D. ≈í¬± and ≈í‚àè have units of m/s, while ≈í¬∫ has unit of m¬¨‚â§/s | |
| 809. |
_Principal alloying elements of cast tool alloys which have very high wear resistance & high temperature strength are$? |
| A. | Cobalt, chromium & tungsten |
| B. | Cobalt, chromium & nickel |
| C. | Molybdenun, tungsten & chromium |
| D. | Cobalt, zirconium & molybdenum |
| Answer» B. Cobalt, chromium & nickel | |
| 810. |
_Thermal efficiency of an internal combustion engine is around __________ percent.$? |
| A. | 8 |
| B. | 35 |
| C. | 65 |
| D. | 80 |
| Answer» C. 65 | |
| 811. |
_Which of the following phenomenon/ phenomena is/are diffusion controlled ?$? |
| A. | Dislocation climb |
| B. | Cross-slip |
| C. | Twinning |
| D. | Recrystallisation |
| Answer» E. | |
| 812. |
_Laser welding is widely employed in the __________ industries.$? |
| A. | Electronic |
| B. | Structural |
| C. | Process |
| D. | Heavy |
| Answer» B. Structural | |
| 813. |
_The velocity of sound in air is independent of changes in its$? |
| A. | Humidity |
| B. | Pressure |
| C. | Temperature |
| D. | None of these |
| Answer» C. Temperature | |
| 814. |
_On decreasing the grain size of a polycrys-talline material, the property most likely to deteriorate is$? |
| A. | Creep |
| B. | Toughness |
| C. | Tensile strength |
| D. | Fatigue |
| Answer» C. Tensile strength | |
| 815. |
_The approximate height of a blast furnace having a useful volume of 2000 m³ is about __________ metres$? |
| A. | 25 |
| B. | 35 |
| C. | 55 |
| D. | 75 |
| Answer» D. 75 | |
| 816. |
_Powder metallurgy is used to produce$? |
| A. | High precision components with complex cavities and sharp features |
| B. | Components of large size |
| C. | Porosity free components |
| D. | Components of such alloys whose constituents do not form alloys readily |
| Answer» D. Components of such alloys whose constituents do not form alloys readily | |
| 817. |
_The passage between the nozzle and the __________ is called 'sprue' in case of injection moulding.$? |
| A. | Runner |
| B. | Cylinder |
| C. | Mold |
| D. | None of these |
| Answer» B. Cylinder | |
| 818. |
_Which of the following metals occurs in nature in their free metallic state?$? |
| A. | Au & Ag |
| B. | Pb & Zn |
| C. | Cu & Ni |
| D. | None of these |
| Answer» E. | |
| 819. |
_Joining of thin foils is preferred to be done by$? |
| A. | Gamma rays |
| B. | X-rays |
| C. | Microwaves |
| D. | Gas welding |
| Answer» D. Gas welding | |
| 820. |
_Drossing is a __________ operation.$? |
| A. | Smelting |
| B. | Dressing |
| C. | Roasting |
| D. | Dressing |
| Answer» D. Dressing | |
| 821. |
_Electrical conductivities of semi-conductors are of the order of __________ ohm/cm.$? |
| A. | 10-3 |
| B. | 103 |
| C. | 10-15 |
| D. | L015 |
| Answer» B. 103 | |
| 822. |
_The surface tension of a liquid, at critical temperature is$? |
| A. | Indeterminate |
| B. | Zero |
| C. | Infinity |
| D. | Same as that at any other temperature |
| Answer» C. Infinity | |
| 823. |
_Welded joint is superior to revetted joint in respect of ease of fabrication, weight and strength. Which of the following joints is the most suitable for pipes carrying fluids under high pressure and temperature?$? |
| A. | Flanged joint |
| B. | Expansion joint |
| C. | Bell and spigot joint |
| D. | None of these |
| Answer» C. Bell and spigot joint | |
| 824. |
_Hooke's law$? |
| A. | Applies to elastic deformation |
| B. | Applies beyond limit of proportionality in stress-strain curve |
| C. | States that stress is inversely proportional to strain upto elastic limit |
| D. | Noneofthese |
| Answer» B. Applies beyond limit of proportionality in stress-strain curve | |
| 825. |
_Sheardising process is used for$? |
| A. | Surface coating |
| B. | Heat treatment of high speed steel |
| C. | Cold working on metals |
| D. | None of these |
| Answer» B. Heat treatment of high speed steel | |
| 826. |
_In case of water (Prandtl number ‚Äö√¢√ 6) flowing over a flat plate heated over the entire length, the thermal boundary layer thickness as compared to hydrodynamic boundary layer thickness is$? |
| A. | Less |
| B. | More |
| C. | Equal |
| D. | Unpredictable |
| Answer» B. More | |
| 827. |
_Which of the following varies as the square root of oil pressure during atomisation of fuel oil through a pressure jet burner?$? |
| A. | Output & fineness |
| B. | Velocity |
| C. | Both A & B |
| D. | None of these |
| Answer» D. None of these | |
| 828. |
_The laminar boundary layer thickness in zero pressure gradient flow over a flat plate along the x-direction varies as x0.5 while the thickness of turbulent boundary layer varies as (where, x = distance from the leading edge)$? |
| A. | X1.5 |
| B. | X0.8 |
| C. | X-1.5 |
| D. | X-0.8 |
| Answer» C. X-1.5 | |
| 829. |
_Break even point represents the condition, when the company runs under no profit no loss condition. In break even analysis, total cost comprises of fixed cost$? |
| A. | Only |
| B. | Plus variable cost |
| C. | Plus overhead cost |
| D. | Plus selling expenses |
| Answer» C. Plus overhead cost | |
| 830. |
___________ property of steel increases by addition of large amount of silicon in it.$? |
| A. | Mechanical |
| B. | Machining |
| C. | Magnetic |
| D. | Refractory |
| Answer» D. Refractory | |
| 831. |
_The dew point temperature lines on psychrometric charts are straight inclined sloping downwards to the right. When relative humidity of moist air is 100%, then$? |
| A. | Wet bulb temperature=dry bulb temperature |
| B. | Wet bulb temperature=dew point temperature |
| C. | Saturation temperature=dew point temperature |
| D. | All of the above |
| Answer» E. | |
| 832. |
_As per the Indian boiler regulation (IBR), the type of joint preferred for the circumferential joint is the __________ joint.$? |
| A. | Butt |
| B. | Lap |
| C. | Welded |
| D. | None of these |
| Answer» C. Welded | |
| 833. |
_Nuclear fission of one atom of uranium⁻²35 produces the energy equivalent to about __________ MeV.$? |
| A. | 20 |
| B. | 200 |
| C. | 500 |
| D. | 1000 |
| Answer» C. 500 | |
| 834. |
_Work study deals with the __________ study.$? |
| A. | Time |
| B. | Motion |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 835. |
_Main constituent of bone ash is$? |
| A. | Ammonium phosphate |
| B. | Calcium phosphate |
| C. | Animal charcoal |
| D. | Ammonium sulphate |
| Answer» C. Animal charcoal | |
| 836. |
_Metals in general have a low value of thermal$? |
| A. | Conductivity |
| B. | Diffusivity |
| C. | Inertia |
| D. | All of the above |
| Answer» D. All of the above | |
| 837. |
_An alloy of Fe - 0.4 % C is$? |
| A. | Cast iron |
| B. | Hypo-eutectoid steel |
| C. | Hyper-eutectoid steel |
| D. | Eutectoid steel |
| Answer» C. Hyper-eutectoid steel | |
| 838. |
_The most important consideration in value engineering is the$? |
| A. | Profit maximisation |
| B. | Customer satisfaction |
| C. | Cost reduction |
| D. | Process improvement |
| Answer» C. Cost reduction | |
| 839. |
_Which of the following is prone to cup and cone fracture?$? |
| A. | Cast iron |
| B. | Soft brass |
| C. | Round specimen of ductile metal |
| D. | Flat tensile specimen of ductile metal |
| Answer» D. Flat tensile specimen of ductile metal | |
| 840. |
_Diffusion co-efficient of a metal in a solid solution depends upon its$? |
| A. | Composition |
| B. | Temperature |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 841. |
_All the atoms of the world comprise of electrons, proton & neutron except that of __________ atom in which neutron is absent.$? |
| A. | Deuterium |
| B. | Hydrogen |
| C. | Neon |
| D. | Helium |
| Answer» C. Neon | |
| 842. |
_High endurance limit of carburised machine parts is because of the fact that carburisation$? |
| A. | Suppresses any stress concentration produced in the parts |
| B. | Enhances the yield point of the material |
| C. | Introduces a compressive layer on the surface |
| D. | Produces a better surface finish |
| Answer» D. Produces a better surface finish | |
| 843. |
_The radioactive isotope of hydrogen is$? |
| A. | Deuterium |
| B. | Tritium |
| C. | Protium |
| D. | None of these |
| Answer» C. Protium | |
| 844. |
_Closeness of packing is maximum in case of __________ crystal lattice.$? |
| A. | Face centred |
| B. | Simple cubic |
| C. | Body centred |
| D. | None of these |
| Answer» B. Simple cubic | |
| 845. |
_Faraday's law of electrolysis is related to the$? |
| A. | Cation speed |
| B. | Atomic number of the cation |
| C. | Equivalent mass of the electrolyte |
| D. | None of these |
| Answer» D. None of these | |
| 846. |
_The cost of providing service in a queing system decreases with the$? |
| A. | Increased mean time in the queue |
| B. | Increased arrival rate |
| C. | Decreased mean time in the queue |
| D. | Decreased arrival rate |
| Answer» B. Increased arrival rate | |
| 847. |
_Nickel and __________ are the alloying element added in steel to increase its toughness.$? |
| A. | Molybdenum |
| B. | Chromium |
| C. | Vanadium |
| D. | Silicon |
| Answer» E. | |
| 848. |
_Which of the following alloying elements is present in maximum percentage in high speed steel.$? |
| A. | Molybdenum |
| B. | Chromium |
| C. | Tungsten |
| D. | Vanadium |
| Answer» B. Chromium | |
| 849. |
_Even minute presence of impurities in copper impairs its electrical conductivity seriously. Electrolytic refinning of blister copper is resorted to, when$? |
| A. | Cheap electricity is available |
| B. | The precious metal content of copper is high |
| C. | There is a demand for ultrapure (99.99%) electrolytic copper |
| D. | All of the above |
| Answer» E. | |
| 850. |
_According to thermodynamic Farenhite scale, the fundamental interval between ice point to steam point is$? |
| A. | 180° |
| B. | 212° |
| C. | 32° |
| D. | 273° |
| Answer» B. 212¬¨‚àû | |