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.
| 751. |
_Light year is the unit of$? |
| A. | Distance |
| B. | Time |
| C. | Intensity of light |
| D. | None of these |
| Answer» B. Time | |
| 752. |
_The thermal efficiency of a heat engine giving an output of 4 KW with an input of 10000 Joules/sec is __________ percent.$? |
| A. | 40 |
| B. | 80 |
| C. | 10 |
| D. | 25 |
| Answer» B. 80 | |
| 753. |
_Out of the following materials, the one which generally exhibits an yield point is$? |
| A. | Hard bronze |
| B. | Soft brass |
| C. | Cold rolled mild steel |
| D. | Hot rolled mild steel |
| Answer» E. | |
| 754. |
_Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid will cease to exist as liquid at$? |
| A. | High vacuum |
| B. | Zero pressure |
| C. | 0°K |
| D. | Earth |
| Answer» C. 0¬¨‚àûK | |
| 755. |
_Lubrication is done to control$? |
| A. | Friction |
| B. | Wear |
| C. | Temperature |
| D. | All of the above |
| Answer» E. | |
| 756. |
_Corrosion of metals can not be prevented by its$? |
| A. | Tempering |
| B. | Chromising |
| C. | Aluminising |
| D. | Alloying |
| Answer» B. Chromising | |
| 757. |
_The routing function in a production system design is concerned with the$? |
| A. | Material flow optimisation through the plant |
| B. | Machine utilisation |
| C. | Quality control of the product |
| D. | Manpower utilisation |
| Answer» C. Quality control of the product | |
| 758. |
_Case hardening is not done by$? |
| A. | Nitriding |
| B. | Hot dipping |
| C. | Electroplating |
| D. | Both B & C |
| Answer» E. | |
| 759. |
_Aromatics are desired constituents of$? |
| A. | Lubricating oil |
| B. | Diesel |
| C. | Kerosene |
| D. | Petrol |
| Answer» D. Petrol | |
| 760. |
_Constituents of stellite are$? |
| A. | Zinc, copper & nickel |
| B. | Cobalt, chromium & tungsten |
| C. | Zinc, aluminium & nickel |
| D. | Nickel, cobalt & vanadium |
| Answer» C. Zinc, aluminium & nickel | |
| 761. |
_Powder metallurgy processing can be used for making$? |
| A. | Dispersion strengthened copper rod |
| B. | Self lubricating bearing and cemented carbide |
| C. | Connecting rod |
| D. | Piston |
| Answer» C. Connecting rod | |
| 762. |
_Out of the following the refractive index is the highest for$? |
| A. | Glass |
| B. | Diamond |
| C. | Brine |
| D. | Kerosene |
| Answer» C. Brine | |
| 763. |
_Thermal shock produced by cooling is more dengerous/deleterious than that produced by heating a surface, because of the reason that$? |
| A. | Cooling produces tension on the surface |
| B. | Cooling produces compression on the surface |
| C. | Heating does not produces any thermal stress |
| D. | Heating produces compression on the surface |
| Answer» B. Cooling produces compression on the surface | |
| 764. |
_An oxidation process is accompanied with decrease in the$? |
| A. | Number of electrons |
| B. | Oxidation number |
| C. | Number of ions |
| D. | All of the above |
| Answer» B. Oxidation number | |
| 765. |
_A friction lighter is normally used for lighting gas welding torch, because of the reason that$? |
| A. | Its initial cost is very low |
| B. | Duration of spark created is very small |
| C. | Safety of welder is ensured |
| D. | It is easier to operate & maintain |
| Answer» D. It is easier to operate & maintain | |
| 766. |
_During decarburising of a plain carbon steel, the thickness of ferrite layer growth is proportional to$? |
| A. | Time |
| B. | Square root of time |
| C. | Square of time |
| D. | Cube of time |
| Answer» C. Square of time | |
| 767. |
_Which of the following phenomenon will exhibit the minimum heat transfer?$? |
| A. | Boiling |
| B. | Forced convection in air |
| C. | Free convection in air |
| D. | Conduction in air |
| Answer» E. | |
| 768. |
_Resilience of a bolt can be increased by increasing its$? |
| A. | Length |
| B. | Shank diameter |
| C. | Head diameter |
| D. | None of these |
| Answer» B. Shank diameter | |
| 769. |
_The thickness of oxide film is y at time t. If K‚ÇÅ, K‚ÇÇ and K‚ÇÉ are the temperature dependent constants, the parabolic law of oxidation is given by$? |
| A. | y² = 2k₁t + k₂ |
| B. | y = k‚ÇÅ ln (k‚ÇÇt + k‚ÇÉ) |
| C. | y = k‚ÇÅ t + k‚ÇÇ |
| D. | y = k₁t³ + k₂ |
| Answer» B. y = k‚Äö√á√Ö ln (k‚Äö√á√át + k‚Äö√á√â) | |
| 770. |
_An atom bomb works on the principle of$? |
| A. | Nuclear fission |
| B. | Nuclear fusion |
| C. | Both the nuclear fission & fusion |
| D. | Ionisation |
| Answer» B. Nuclear fusion | |
| 771. |
_Which of the following are considered applications of ultrasonic testing ?$? |
| A. | Determination of elastic constant |
| B. | Detection of defects in metal |
| C. | Measurement of material thickness |
| D. | None of the above |
| Answer» C. Measurement of material thickness | |
| 772. |
_Percentage of gaunge is maximum in the ore of$? |
| A. | Iron |
| B. | Gold |
| C. | Zinc |
| D. | Copper |
| Answer» C. Zinc | |
| 773. |
_Which of the following absorbs maximum heat in a high pressure boiler ?$? |
| A. | Economiser |
| B. | Steam superheater |
| C. | Air preheater |
| D. | Furnace water wall |
| Answer» E. | |
| 774. |
_The capacity of a material to absorb energy depends upon both its strength & stiffness. The term 'stiffness' of a material is the opposite of its$? |
| A. | Flexibility |
| B. | Plasticity |
| C. | Hardness |
| D. | Hardenability |
| Answer» B. Plasticity | |
| 775. |
_Cast iron has the unique property of high$? |
| A. | Ductility |
| B. | Damping characteristics |
| C. | Hardness |
| D. | Malleability |
| Answer» C. Hardness | |
| 776. |
_Fibre glass is a composite material of$? |
| 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 | |
| 777. |
_With increase in carbon percentage in steel, its$? |
| A. | Yield stress decreases |
| B. | Elongation percent increases |
| C. | Tensile strength increases |
| D. | Impact strength increases |
| Answer» D. Impact strength increases | |
| 778. |
_A spark ignition petrol engine has$? |
| A. | Throttle valve |
| B. | Carburettor |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 779. |
_Phosphorous is added to copper melt to$? |
| A. | Remove hydrogen |
| B. | Deoxidise the metal |
| C. | Improve fluidity |
| D. | Reduce shrinkage |
| Answer» B. Deoxidise the metal | |
| 780. |
_The forms in which various metals and non metals occur in nature are called minerals. Which of the following is not a metallic ferrous mineral?$? |
| A. | Cassiterite |
| B. | Sphalerite |
| C. | Chalcopyrite |
| D. | Calcite |
| Answer» E. | |
| 781. |
_Moist climate is the most favourable factor in the site selection far a$? |
| A. | Steel plant |
| B. | Textile factory |
| C. | Petroleum refinery |
| D. | Coke oven battery |
| Answer» C. Petroleum refinery | |
| 782. |
_Refrigerative cooling employed during long distance transportation of food stuffs is normally done by$? |
| A. | Ice |
| B. | Liquid nitrogen |
| C. | Liquid oxygen |
| D. | Vacuum evaporation |
| Answer» C. Liquid oxygen | |
| 783. |
_Dryness fraction of dry steam is$? |
| A. | 0 |
| B. | ? |
| C. | 1 |
| D. | 0.5 |
| Answer» D. 0.5 | |
| 784. |
_Limestone addition in the blast furnace is done to flux __________ present in the raw materials.$? |
| A. | SiO‚ÇÇ |
| B. | Al2O‚ÇÉ |
| C. | MnO‚ÇÇ |
| D. | P |
| Answer» B. Al2O‚Äö√á√â | |
| 785. |
_Which one is neutral in character ?$? |
| A. | N‚ÇÇO‚ÇÑ |
| B. | N‚ÇÇO |
| C. | N‚ÇÇO‚ÇÖ |
| D. | N‚ÇÇO‚ÇÉ |
| Answer» C. N‚Äö√á√áO‚Äö√á√ñ | |
| 786. |
_Transition from laminar flow to turbulent flow in fluid flow through a pipe does not depend upon the$? |
| A. | Length of the pipe |
| B. | Diameter of the pipe |
| C. | Density of the fluid |
| D. | Velocity of the fluid |
| Answer» B. Diameter of the pipe | |
| 787. |
_What is the value of included angle of a triangular notch for maximum discharge ?$? |
| A. | 30° |
| B. | 60° |
| C. | 90° |
| D. | 120° |
| Answer» D. 120¬¨‚àû | |
| 788. |
_Which of the following is an example of cathodic protection of metals against corrosion ?$? |
| A. | Painted steel |
| B. | Galvanised iron |
| C. | Case hardened steel |
| D. | Lead lined reactor |
| Answer» C. Case hardened steel | |
| 789. |
_For hardening high alloy steel, it is to be heated slowly and uniformly to avoid$? |
| A. | Local hardening |
| B. | Scale formation |
| C. | Segregation |
| D. | Warpage |
| Answer» E. | |
| 790. |
_Super conduction in metals is observed at a temperature of __________ °K.$? |
| A. | <100 |
| B. | >100 |
| C. | About 273 |
| D. | About 373 |
| Answer» C. About 273 | |
| 791. |
_In radiative heat transfer, a grey surface is the one, which has$? |
| A. | Emissivity independent of wavelength |
| B. | Grey appearance to the eye |
| C. | Zero reflectivity |
| D. | Equal brightness in all directions |
| Answer» B. Grey appearance to the eye | |
| 792. |
___________ joint is usually used for joining cast iron pipes mostly used for temporary pipelines, where it may be necessary to dismantle & reassemble the pipeline very frequently.$? |
| A. | Collar |
| B. | Flanged |
| C. | Bell and Spigot |
| D. | Expansion |
| Answer» C. Bell and Spigot | |
| 793. |
_Notched bar test is used for testing the __________ of a material.$? |
| A. | Impact strength |
| B. | Endurance limit |
| C. | Machinability |
| D. | Corrosion resistance |
| Answer» B. Endurance limit | |
| 794. |
_A jig is used while __________ a hole.$? |
| A. | Boring |
| B. | Counter boring |
| C. | Drilling |
| D. | Enlarging |
| Answer» D. Enlarging | |
| 795. |
_Ultimate strength in tension as compared to that in shear for steel is$? |
| A. | Half |
| B. | One third |
| C. | One and half times |
| D. | One fourth |
| Answer» D. One fourth | |
| 796. |
_Oxyacetylene reducing flame is used while carrying out welding on$? |
| A. | Alloy steel |
| B. | Grey cast iron |
| C. | Mild steel |
| D. | High carbon steel |
| Answer» D. High carbon steel | |
| 797. |
_Color of brass changes from yellow to __________ after its dezincification which exemplifies selective leaching.$? |
| A. | Grey |
| B. | Red |
| C. | Orange |
| D. | Violet |
| Answer» C. Orange | |
| 798. |
_Optical activity is a/an __________ property.$? |
| A. | Additive |
| B. | Constitutive |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 799. |
_With increase in annealing temperature, the following defect density decreases.$? |
| A. | Vacancy |
| B. | Dislocation |
| C. | Grain boundary |
| D. | All of the above |
| Answer» E. | |
| 800. |
_In __________ process, there is an increase in entropy with no degradation of energy.$? |
| A. | Isothermal expansion |
| B. | Isochoric heat addition |
| C. | Polytropic expansion |
| D. | Isobaric heat addition |
| Answer» B. Isochoric heat addition | |