MCQOPTIONS
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MCQOPTIONS
This section includes 1037 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 901. |
Compressive strength of wood is usually more along the grains. The tenile strength of wood as compared to that of steel is about |
| A. | half |
| B. | one third |
| C. | one fifth |
| D. | one twelfth |
| Answer» D. one twelfth | |
| 902. |
__________ can replace tungsten in high speed steel, |
| A. | Chromium |
| B. | Vanadium |
| C. | Cobalt |
| D. | Molybdenum |
| Answer» E. | |
| 903. |
Generally __________ are subjected to galvanising (i.e., zinc coating). |
| A. | non-ferrous metals |
| B. | non-metals |
| C. | low carbon steels |
| D. | stainless steel |
| Answer» D. stainless steel | |
| 904. |
Which of the following is the easiest to bend? |
| A. | Steel |
| B. | Stainless steel |
| C. | Cast iron |
| D. | Wrought iron |
| Answer» E. | |
| 905. |
Corrosion involves exchange of electrons in __________ corrosion. |
| A. | chemical |
| B. | electrochemical |
| C. | both (a) & (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 906. |
Hydrochloric acid is __________ corrosive to common metals. |
| A. | least |
| B. | not |
| C. | mildly |
| D. | highly |
| Answer» E. | |
| 907. |
An ideal material of construction for the storage of 50% caustic soda solution would be |
| A. | karbate |
| B. | high silicon cast iron |
| C. | monel |
| D. | none of these |
| Answer» D. none of these | |
| 908. |
The material used in the filament of electric bulbs is |
| A. | nichrome |
| B. | tungsten |
| C. | constantan |
| D. | German silver |
| Answer» C. constantan | |
| 909. |
Which of the following heat treatment processes is used for softening the hardened material ? |
| A. | Normalising |
| B. | Tempering |
| C. | Annealing |
| D. | None of these |
| Answer» C. Annealing | |
| 910. |
'Hypersil' is a __________ steel. |
| A. | high speed |
| B. | silicon |
| C. | molybdenum |
| D. | tungsten |
| Answer» C. molybdenum | |
| 911. |
Hardest materials so far found is |
| A. | diamond |
| B. | graphite |
| C. | carborundum |
| D. | pumice stone |
| Answer» B. graphite | |
| 912. |
Interchain forces are the weakest in case of |
| A. | plastics |
| B. | fibres |
| C. | elastomers |
| D. | both rubber & elastomers |
| Answer» E. | |
| 913. |
Softness of silver can be converted into hardness by alloying it with small quantity of |
| A. | copper & nickel |
| B. | zinc |
| C. | aluminium |
| D. | tin |
| Answer» B. zinc | |
| 914. |
Addition of __________ in steel can help in increasing the depth of hardness. |
| A. | nickel |
| B. | chromium |
| C. | vanadium |
| D. | tungsten |
| Answer» E. | |
| 915. |
White cast iron is not |
| A. | malleable |
| B. | whitish in color |
| C. | brittle |
| D. | strong and hard |
| Answer» B. whitish in color | |
| 916. |
In order to be called steel, an alloy should have iron percentage greater than |
| A. | 80 |
| B. | 70 |
| C. | 90 |
| D. | 50 |
| Answer» B. 70 | |
| 917. |
Straight silicon steel (containing Si from 0.5 to 5%) because of their low hysterisis loss and high magnetic permeability are used for electrical appliances. Which of the following electrical appliances made of silicon steel contains maximum percentage of silicon (about 4%) ? |
| A. | Armature of small motors/generators. |
| B. | Generators and small motors. |
| C. | Induction motors. |
| D. | High frequency transformers. |
| Answer» E. | |
| 918. |
__________ iron is produced, when molten pig iron is allowed to cool gradually. |
| A. | White cast |
| B. | Grey cast |
| C. | Wrought |
| D. | none of these |
| Answer» C. Wrought | |
| 919. |
Electronic structure of a material is generally studied by |
| A. | metallurgical microscope |
| B. | electron diffraction |
| C. | spectroscopic techniques |
| D. | X-ray |
| Answer» D. X-ray | |
| 920. |
High degree of toughness is a must for |
| A. | high speed steel |
| B. | shock resisting steel |
| C. | cold work tool steel |
| D. | none of these |
| Answer» C. cold work tool steel | |
| 921. |
Which of the following alloys does not contain nickel ? |
| A. | Chlorinet - 2 alloy |
| B. | Monel |
| C. | Inconel |
| D. | Babbit metal |
| Answer» E. | |
| 922. |
Aluminium alloy is one of the most suitable materials of construction for aircrafts mainly due to its |
| A. | high strength to weight ratio. |
| B. | low temperature strength properties. |
| C. | its ability to be cast, rolled, forged & stamped. |
| D. | high strength and corrosion & oxidation-resistance at elevated temperature. |
| Answer» B. low temperature strength properties. | |
| 923. |
Metalloid is |
| A. | an element, which exhibits the properties of both metal & non metal. |
| B. | highly electronegative in nature. |
| C. | an alloy. |
| D. | all (a), (b) & (c) |
| Answer» B. highly electronegative in nature. | |
| 924. |
Caustic soda is produced in a mercury cell having anode and cathode made respectively of moving mercury and |
| A. | moving mercury and graphite. |
| B. | graphite and moving mercury. |
| C. | moving mercury and carbon. |
| D. | moving mercury and crimped steel wire. |
| Answer» C. moving mercury and carbon. | |
| 925. |
Corrosion resisting properties of cast iron are significantly improved by the addition of 12 - 15% of |
| A. | tungsten |
| B. | vanadium |
| C. | silicon |
| D. | all (a), (b) & (c) |
| Answer» D. all (a), (b) & (c) | |
| 926. |
Caustic soda can be stored in __________ drums. |
| A. | steel |
| B. | cast iron |
| C. | brass |
| D. | gun metal |
| Answer» B. cast iron | |
| 927. |
Zinc is not used |
| A. | for producing zinc base die casting alloys. |
| B. | in its oxide form as pigments. |
| C. | as anode for corrosion prevention in boiler. |
| D. | as an alloying element in various bronzes. |
| Answer» E. | |
| 928. |
Residual magnetism in steel for magnets is increased by the addition of |
| A. | nickel |
| B. | cobalt |
| C. | tungsten |
| D. | chromium |
| Answer» C. tungsten | |
| 929. |
18-4-1 high speed steel contains 18%, 4% and 1% respectively of |
| A. | tungsten, vanadium and chromium |
| B. | tungsten, chromium and vanadium |
| C. | vanadium, chromium and tungsten |
| D. | chromium, tungsten and vanadium |
| Answer» C. vanadium, chromium and tungsten | |
| 930. |
Addition of __________ to the steel helps in increasing the residual magnetism in steel used for making magnets. |
| A. | chromium |
| B. | nickel |
| C. | tungsten |
| D. | cobalt |
| Answer» E. | |
| 931. |
__________ of a material results, when its strength is increased & ductility is decreased by heating at a relatively lower temperature after cold working. |
| A. | Solid solution hardening |
| B. | Screw dislocation |
| C. | Strain ageing |
| D. | Twinning |
| Answer» D. Twinning | |
| 932. |
A material is called 'ductile', if it can be |
| A. | drawn into wires. |
| B. | hammered to a thin sheet. |
| C. | fractured without deformation. |
| D. | made lustrous by heating it. |
| Answer» B. hammered to a thin sheet. | |
| 933. |
Steel balls for ball bearings are generally made of __________ steel. |
| A. | cast |
| B. | stainless |
| C. | free carbon |
| D. | carbon chrome |
| Answer» E. | |
| 934. |
Ceramic materials |
| A. | are exemplified by clay and mica. |
| B. | are poor electrical conductors due to lack of free electrons. |
| C. | never exhibit polymorphism. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 935. |
Presence of cobalt in steel improves its |
| A. | cutting ability |
| B. | corrosion resistance |
| C. | tensile strength |
| D. | none of these |
| Answer» B. corrosion resistance | |
| 936. |
DDT is shipped in |
| A. | stainless steel containers |
| B. | paper bags |
| C. | fibre drums |
| D. | either (b) or (c) |
| Answer» E. | |
| 937. |
Gun metal is an alloy of |
| A. | nickel, tin and copper |
| B. | copper, tin and zinc |
| C. | copper, phosphorus and nickel |
| D. | manganese, phosphorus and nickel |
| Answer» C. copper, phosphorus and nickel | |
| 938. |
German silver used for decorative purposes contains maximum percentage of |
| A. | silver |
| B. | copper |
| C. | zinc |
| D. | nickel |
| Answer» C. zinc | |
| 939. |
In cold working of metal as compared to its hot working |
| A. | cracks and blow holes are eliminated. |
| B. | ductility and impact strength improves. |
| C. | appreciable strain hardening is produced. |
| D. | yield stress, hardness and fatigue strength is not at all affected. |
| Answer» D. yield stress, hardness and fatigue strength is not at all affected. | |
| 940. |
Ammonium chloride solution is stored/ treated in __________ vessels/pipes. |
| A. | plain carbon steel |
| B. | stainless steel |
| C. | rubber or durmet-20 lined |
| D. | lead |
| Answer» D. lead | |
| 941. |
Visco-elastic behaviour of materials which is time dependent is common in |
| A. | plastics |
| B. | crystalline solid |
| C. | non-crystalline solids |
| D. | non-crystalline organic polymer |
| Answer» E. | |
| 942. |
Fatigue strength of a material increases by |
| A. | having notches in the specimen |
| B. | rise in temperature |
| C. | under stressing the specimen |
| D. | having scratches on the surface |
| Answer» D. having scratches on the surface | |
| 943. |
Which of the following is the most elastic material ? |
| A. | Plastic |
| B. | Glass |
| C. | Steel |
| D. | Rubber |
| Answer» D. Rubber | |
| 944. |
Which of the following is not used as the ceramic material in 'cermets' ? |
| A. | Silicides |
| B. | Oxides |
| C. | Carbides |
| D. | Nitrides |
| Answer» E. | |
| 945. |
Dry chlorine can be handled in a vessel made of |
| A. | iron or steel |
| B. | PVC (c) nickel |
| C. | brass |
| D. | |
| Answer» B. PVC (c) nickel | |
| 946. |
Hammers and railway rails are normally made of |
| A. | mild steel |
| B. | dead mild steel |
| C. | medium carbon steel |
| D. | high carbon steel |
| Answer» E. | |
| 947. |
__________ is a donor impurity for semi-conductors. |
| A. | Boron |
| B. | Antimony |
| C. | Gallium |
| D. | none of these |
| Answer» C. Gallium | |
| 948. |
Liquid ammonia is shipped in __________ containers. |
| A. | steel |
| B. | aluminium |
| C. | glass |
| D. | lead lined |
| Answer» D. lead lined | |
| 949. |
For platinum thermocouples, lead wires are made of |
| A. | copper & copper-nickel alloys. |
| B. | copper & iron. |
| C. | iron & nickel. |
| D. | tin & nickel. |
| Answer» B. copper & iron. | |
| 950. |
The hardest material just prior to diamond in Mho's scale is |
| A. | topax |
| B. | carborundum |
| C. | corrundum |
| D. | calcite |
| Answer» D. calcite | |