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.
| 951. |
Material of construction of pipe generally used for conveying water in India is |
| A. | stainless steel |
| B. | cast iron |
| C. | wrought iron |
| D. | lead lined steel |
| Answer» C. wrought iron | |
| 952. |
Lead |
| A. | is the hardest metal in common use. |
| B. | is the lightest metal in common use. |
| C. | can not be scratched by finger nails. |
| D. | can not be work hardened. |
| Answer» E. | |
| 953. |
Phenol is not shipped in |
| A. | nickel lined steel tank cars. |
| B. | galvanised or tin lined drums. |
| C. | boxed glass carboys. |
| D. | cast iron containers. |
| Answer» E. | |
| 954. |
The metals occuring at the lower most position in the electromotive series |
| A. | do not resist corrosion. |
| B. | resist corrosion very strongly. |
| C. | are very brittle. |
| D. | are heat insulators. |
| Answer» C. are very brittle. | |
| 955. |
To improve the machinability of steel by its softening, it is subjected to |
| A. | cold working |
| B. | annealing |
| C. | shot blasting |
| D. | heating |
| Answer» C. shot blasting | |
| 956. |
A suitable material of construction to use with fuming sulphuric acid is |
| A. | carbon steel |
| B. | stainless steel type 304 |
| C. | nickel |
| D. | monel |
| Answer» E. | |
| 957. |
Presence of high amount of silicon in cast iron |
| A. | suppresses the decomposition of Fe3 C. |
| B. | increases the formation of graphite. |
| C. | increases the contraction of the metal. |
| D. | reduces its fluidity. |
| Answer» C. increases the contraction of the metal. | |
| 958. |
__________ possesses viscoelastic properties. |
| A. | Cork |
| B. | Glass |
| C. | Graphite |
| D. | Rubber |
| Answer» E. | |
| 959. |
Nickel is a constituent of |
| A. | bronze |
| B. | solder |
| C. | duralumin |
| D. | monel metal |
| Answer» E. | |
| 960. |
White cast iron as compared to grey cast iron is |
| A. | more durable |
| B. | very brittle |
| C. | very hard |
| D. | all (a), (b) & (c) |
| Answer» E. | |
| 961. |
Carbon tetrachloride can be stored in a storage vessel made of |
| A. | high silicon iron (14% Si) |
| B. | tin |
| C. | stainless steel |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 962. |
Which one contains the least percentage of carbon ? |
| A. | Wrought iron |
| B. | High speed steel |
| C. | Cast iron |
| D. | Pig iron |
| Answer» B. High speed steel | |
| 963. |
Which of the following stainless steels is non-magnetic ? |
| A. | Ferritic |
| B. | Martensitic |
| C. | Austenitic |
| D. | None of these |
| Answer» D. None of these | |
| 964. |
Stainless steel contains |
| A. | chromium and nickel |
| B. | copper |
| C. | aluminium |
| D. | vanadium |
| Answer» B. copper | |
| 965. |
Amount of energy that a material can absorb before its fracture is a measure of its |
| A. | toughness |
| B. | resilience |
| C. | malleability |
| D. | ductility |
| Answer» B. resilience | |
| 966. |
Valves in pipe size of 2" and under are normally made of |
| A. | wrought iron |
| B. | brass |
| C. | bronze |
| D. | monel |
| Answer» C. bronze | |
| 967. |
Which of the following alloying elements is present in maximum percentage in high speed steel. |
| A. | Molybdenum |
| B. | Chromium |
| C. | Tungsten |
| D. | Vanadium |
| Answer» D. Vanadium | |
| 968. |
Lead pipes are not safe for carraying drinking water, because water, containing dissolved oxygen attacks lead thereby forming poisonous Pb(OH)2. Lead pipes are readily corroded by |
| A. | dilute HC1 |
| B. | acetic acid |
| C. | concentrated H2SO4 |
| D. | none of these |
| Answer» C. concentrated H2SO4 | |
| 969. |
Carbon is present in steel wholly in the |
| A. | combined form. |
| B. | free state as graphite. |
| C. | both (a) and (b). |
| D. | neither (a) nor (b). |
| Answer» B. free state as graphite. | |
| 970. |
Neutraliser tank used for reacting nitric acid with ammonia for the production of ammonium nitrate is made of |
| A. | aluminium |
| B. | stainles steel |
| C. | high silicon (14%) iron |
| D. | copper |
| Answer» C. high silicon (14%) iron | |
| 971. |
Polythene (low or high density) containers are not corroded by |
| A. | sulphuric acid (10%) at room temperature. |
| B. | nitric acid (95%) at room temperature. |
| C. | sulphur trioxide at 60°C. |
| D. | any of these. |
| Answer» B. nitric acid (95%) at room temperature. | |
| 972. |
Acetylene gas holder is made of |
| A. | copper |
| B. | cast iron |
| C. | steel |
| D. | monel metal |
| Answer» D. monel metal | |
| 973. |
Silicon percentage in iron castings to have maximum hardness should be about |
| A. | 0.3 |
| B. | 0.5 |
| C. | 0.8 |
| D. | 2.5 |
| Answer» D. 2.5 | |
| 974. |
The addition of antimony in tin-based alloys improves its |
| A. | rupture strength and hot hardness. |
| B. | impact strength and bonding strength. |
| C. | deformation resistance. |
| D. | wear resistance. |
| Answer» D. wear resistance. | |
| 975. |
Mild steel is used for making |
| A. | fish plates |
| B. | die block |
| C. | channels |
| D. | drop forging |
| Answer» D. drop forging | |
| 976. |
Hydrochloric acid is stored in a __________ steel vessel. |
| A. | lead lined |
| B. | rubber lined |
| C. | glass lined |
| D. | stainless |
| Answer» C. glass lined | |
| 977. |
Acetaldehyde is shipped in __________ drums. |
| A. | cast iron |
| B. | steel |
| C. | aluminium |
| D. | either (b) & (c) |
| Answer» E. | |
| 978. |
High speed cutting tool steels contain about __________ percent of tungsten. |
| A. | 43683 |
| B. | 18-20 |
| C. | 30-35 |
| D. | 50-55 |
| Answer» C. 30-35 | |
| 979. |
Diamagnetic materials are magnetised |
| A. | strongly. |
| B. | only slightly. |
| C. | with eddy currents only. |
| D. | in a direction opposite to that of the applied field. |
| Answer» E. | |
| 980. |
Silicon percentage in acid resistant cast iron is about |
| A. | 4 |
| B. | 8 |
| C. | 14 |
| D. | 20 |
| Answer» D. 20 | |
| 981. |
Which of the following has the poorest wel-dability ? |
| A. | Low carbon steel |
| B. | Mild steel |
| C. | Wrought iron |
| D. | High-carbon steel |
| Answer» E. | |
| 982. |
Cementite is |
| A. | Fe3C chemically. |
| B. | a compound of carbon and iron. |
| C. | characterised by an orthorhombic crystal structure. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 983. |
Which of the following is the softest material ? |
| A. | Quartz |
| B. | Calcite |
| C. | Corrundum |
| D. | Flourite |
| Answer» C. Corrundum | |
| 984. |
The fermentor used in the production of pencillin (by deep fermentation process) is made of |
| A. | glass |
| B. | glass lined steel |
| C. | high silicon cast iron |
| D. | procelain |
| Answer» C. high silicon cast iron | |
| 985. |
The melleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the miximum malleability ? |
| A. | Lead |
| B. | Copper |
| C. | Aluminium |
| D. | Wrought iron |
| Answer» B. Copper | |
| 986. |
Post weld heat treatment is done by |
| A. | normalising |
| B. | stress relieving |
| C. | tempering |
| D. | solution annealing |
| Answer» C. tempering | |
| 987. |
Steel tower used for the storage of oleum |
| A. | is lined with lead. |
| B. | need not be lined. |
| C. | is lined with rubber. |
| D. | is lined with acid-proof bricks. |
| Answer» C. is lined with rubber. | |
| 988. |
__________ is not a case hardening process. |
| A. | Carburising |
| B. | Nitriding |
| C. | Cyaniding |
| D. | Annealing |
| Answer» E. | |
| 989. |
Non-ferrous metals and hard steels do not exhibit a definite yield point, when pulled in the testing machine and hence for these cases, a better measure of their elastic properties is defined by the __________ stress. |
| A. | ultimate |
| B. | yield point |
| C. | proof |
| D. | none of these |
| Answer» D. none of these | |
| 990. |
Cast irons are generally specified by their |
| A. | carbon content |
| B. | tensile strength |
| C. | hardness |
| D. | manufacturing proces |
| Answer» C. hardness | |
| 991. |
Which of the following has the highest density and the lowest melting point ? |
| A. | Stainless steel |
| B. | Titanium |
| C. | Lead |
| D. | Aluminium |
| Answer» D. Aluminium | |
| 992. |
Which of the following crystal structures characterises the austenitic stainless steel? |
| A. | Simple hexagonal |
| B. | Body centred cubic |
| C. | Face centred cubic |
| D. | None of these |
| Answer» D. None of these | |
| 993. |
Wrought iron is a suitable material of construction for handling __________ solutions. |
| A. | dilute acidic |
| B. | concentrated acidic |
| C. | alkalis & alkaline |
| D. | none of these |
| Answer» D. none of these | |
| 994. |
Addition of lead, sulphur and phosphorus to low carbon steel helps in improving its |
| A. | corrosion resistance |
| B. | tensile strength |
| C. | machinability |
| D. | compressive strength |
| Answer» D. compressive strength | |
| 995. |
The fermentor used for the production of ethyl alcohol from molasses is made of |
| A. | wood |
| B. | concrete |
| C. | copper bearing steel |
| D. | procelain |
| Answer» D. procelain | |
| 996. |
Carbon is present in the combined form (carbide) in case of |
| A. | pig iron |
| B. | steel |
| C. | ferroalloys |
| D. | all (a), (b) & (c) |
| Answer» E. | |
| 997. |
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. | |
| 998. |
Work hardening of a material |
| A. | decreases its tensile strength. |
| B. | decreases its ductility. |
| C. | increases its ductility. |
| D. | does not affect its ductility. |
| Answer» C. increases its ductility. | |
| 999. |
Chlorination of benzene is done to produce benzene hexachloride (a pesticide) in a photochemical reactor lined with |
| A. | karbate |
| B. | lead or glass |
| C. | fireclay bricks |
| D. | PVC |
| Answer» C. fireclay bricks | |
| 1000. |
Percentage elongation of a material is a measure of its |
| A. | ductility |
| B. | brittleness |
| C. | toughness |
| D. | malleability |
| Answer» B. brittleness | |