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.
| 751. |
Polymerisation reactor used for the production of styrene butadiene rubber (SBR) is made of |
| A. | cast iron |
| B. | stainless steel or glass lined vessel |
| C. | karbate |
| D. | wrought iron |
| Answer» C. karbate | |
| 752. |
Ability of a material to __________ is indicated by its damping capacity. |
| A. | withstand compression |
| B. | absorb vibration |
| C. | absorb shock |
| D. | none of these |
| Answer» C. absorb shock | |
| 753. |
Bush bearings are made of |
| A. | mild steel |
| B. | phosphorous bronze |
| C. | white metal alloys |
| D. | none of these |
| Answer» C. white metal alloys | |
| 754. |
Softening of hardned steel is done by its |
| A. | normalising |
| B. | tempering |
| C. | annealing |
| D. | carburising |
| Answer» C. annealing | |
| 755. |
Which metal is protected by the layer of its own oxide ? |
| A. | Iron |
| B. | Silver |
| C. | Calcium |
| D. | Aluminium |
| Answer» E. | |
| 756. |
White metal is an alloy of |
| A. | lead, tin and cadmium |
| B. | copper, tin and zinc |
| C. | copper and lead |
| D. | none of these |
| Answer» E. | |
| 757. |
Nickel and molybdenum are the basic constituents of |
| A. | hastealloy |
| B. | German silver |
| C. | inconel |
| D. | solder |
| Answer» B. German silver | |
| 758. |
Caustic soda is transported in __________ lined containers. |
| A. | glass |
| B. | nickel |
| C. | neoprene |
| D. | either (b) or (c) |
| Answer» E. | |
| 759. |
Chromel (Nichrome) is an alloy of |
| A. | chromium and molybdenum. |
| B. | nickel and chromium. |
| C. | molybdenum and nickel. |
| D. | chromium and aluminium. |
| Answer» C. molybdenum and nickel. | |
| 760. |
Which of the following comprises of hydrocarbons ? |
| A. | Mica flakes |
| B. | Glass |
| C. | Rubber |
| D. | None of these |
| Answer» D. None of these | |
| 761. |
Atmospheric corrosion of metals result from their |
| A. | slow oxidation |
| B. | fast oxidation |
| C. | fast hydration |
| D. | slow dehydration |
| Answer» B. fast oxidation | |
| 762. |
Which of the following will have the highest melting point ? |
| A. | Pig iron |
| B. | Mild steel |
| C. | Wrought iron |
| D. | High carbon steel |
| Answer» D. High carbon steel | |
| 763. |
Which of the following is not an alloy of tin? |
| A. | White-bearing metal |
| B. | Pewter type metal |
| C. | Soft solder |
| D. | German silver |
| Answer» E. | |
| 764. |
The loss of strength in compression which occurs, when there is a gain of strength in tension due to over loading is called |
| A. | Bauschinger effect. |
| B. | Hooke's effect. |
| C. | hysterisis. |
| D. | relaxation. |
| Answer» B. Hooke's effect. | |
| 765. |
Reduction in the grain size reduces the __________ of the material. |
| A. | fatigue resistance |
| B. | tensile strength |
| C. | creep resistance |
| D. | all (a), (b) & (c) |
| Answer» D. all (a), (b) & (c) | |
| 766. |
Steel will respond to hardening by heat treatment processes, only when the minimum carbon content in it is __________ percent. |
| A. | 0.02 |
| B. | 0.2 |
| C. | 0.35 |
| D. | 0.5 |
| Answer» C. 0.35 | |
| 767. |
Lead alone is not used in storing equipment, because it |
| A. | is very costly. |
| B. | corrodes easily. |
| C. | is having low creep strength. |
| D. | none of these. |
| Answer» D. none of these. | |
| 768. |
Locomotive boiler tubes are made of __________ alloys. |
| A. | arsenic copper |
| B. | magnesium |
| C. | aluminium |
| D. | nickel |
| Answer» B. magnesium | |
| 769. |
Which of the following mechanical properties of a material is most structure insensitive ? |
| A. | Modulus of elasticity (young's modulus). |
| B. | Toughness. |
| C. | Percentage reduction of area. |
| D. | Tensile strength. |
| Answer» B. Toughness. | |
| 770. |
Percentage of silver in German silver is |
| A. | 5 |
| B. | 10 |
| C. | 20 |
| D. | 0 |
| Answer» E. | |
| 771. |
Trough of an apron conveyor is made of |
| A. | lead lined concrete vessel |
| B. | wood |
| C. | metal |
| D. | either (b) or (c) |
| Answer» E. | |
| 772. |
Biological shield in a nuclear power reactor is made of |
| A. | concrete |
| B. | steel |
| C. | cadmium |
| D. | zircalloy |
| Answer» B. steel | |
| 773. |
Evaporator used for concentrating tomato juice is made of |
| A. | nickel |
| B. | brass |
| C. | stainless steel-glass lined |
| D. | cast iron-rubber lined |
| Answer» D. cast iron-rubber lined | |
| 774. |
The temperature at which new grains are formed in the metal is called the __________ temperature. |
| A. | eutectic |
| B. | recrystallisation |
| C. | upper critical |
| D. | lower critical |
| Answer» C. upper critical | |
| 775. |
The damage/deterioration of metals by the __________ action of fluids is called 'erosion'. |
| A. | abrasive |
| B. | corrosive |
| C. | both (a) & (b) |
| D. | neither (a) nor (b) |
| Answer» B. corrosive | |
| 776. |
Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with |
| A. | acidic refractory |
| B. | rubber |
| C. | karbate |
| D. | lead or acid proof bricks |
| Answer» B. rubber | |
| 777. |
A material no longer behaves elastically beyond |
| A. | plastic limit |
| B. | limiting load |
| C. | elastic limit |
| D. | breaking load |
| Answer» D. breaking load | |
| 778. |
__________ is added in low carbon steel to raise its yield point. |
| A. | Sulphur |
| B. | Phosphorous |
| C. | Silicon |
| D. | Manganese |
| Answer» E. | |
| 779. |
The most commonly used resin for making reinforced plastic is |
| A. | unsaturated polyester |
| B. | polypropylene |
| C. | polyurathane |
| D. | nylon-6 |
| Answer» B. polypropylene | |
| 780. |
In the kraft (sulphate) process for the paper manufacture, the digestor is made of |
| A. | cast iron |
| B. | stainless steel |
| C. | karbate carbon |
| D. | wrought iron |
| Answer» C. karbate carbon | |
| 781. |
The hardest material just prior to diamond in Mhos scale is |
| A. | topax |
| B. | carborundum |
| C. | corrundum |
| D. | calcite |
| Answer» D. calcite | |
| 782. |
Iron rust is |
| A. | ferrous oxide. |
| B. | hydrated ferric oxide. |
| C. | powdered iron. |
| D. | ferric sulphide. |
| Answer» C. powdered iron. | |
| 783. |
High carbon steel contains more than __________ percent carbon. |
| A. | 0.5 |
| B. | 2.2 |
| C. | 2.5 |
| D. | 2.8 |
| Answer» B. 2.2 | |
| 784. |
Maximum carbon content in any variety of steel can be upto 1.3%. Steel containing 0.4% Carbon is not used for making |
| A. | nuts |
| B. | bolts |
| C. | chiesels |
| D. | studs |
| Answer» D. studs | |
| 785. |
Which of the following is a non-magnetic material ? |
| A. | Cobalt |
| B. | Zinc |
| C. | Nickel |
| D. | None of these |
| Answer» C. Nickel | |
| 786. |
Coke oven walls are lined with __________ bricks. |
| A. | silica |
| B. | tar-dolomite |
| C. | low thermal conductivity |
| D. | fire clay |
| Answer» B. tar-dolomite | |
| 787. |
The softest material just next to talc in the Mho's scale is |
| A. | quartz |
| B. | gypsum |
| C. | feldspar |
| D. | fluorite |
| Answer» C. feldspar | |
| 788. |
Which of the following finds the least commercial use ? |
| A. | Pure iron |
| B. | High silicon iron |
| C. | Low carbon steel |
| D. | High carbon steel |
| Answer» B. High silicon iron | |
| 789. |
The high expansion metal normally used in the bimetallic thermometer is __________ temperature measurement. |
| A. | brass for low |
| B. | nickel alloys for high |
| C. | both'a' & 'b' |
| D. | aluminium for all |
| Answer» D. aluminium for all | |
| 790. |
Specify the material of construction suitable for handling concentrated HNO3 at 100°C.$ |
| A. | High silicon iron, Kel-F and teflon |
| B. | Tin and wood |
| C. | Silicone rubber |
| D. | Stainless steel |
| Answer» B. Tin and wood | |
| 791. |
Spark plugs are made of |
| A. | high alumina ceramic |
| B. | metallic carbides |
| C. | corundum |
| D. | carborundum |
| Answer» B. metallic carbides | |
| 792. |
Which of the following metals in not used for coating of the base metal to guard it against corrosion ? |
| A. | Lead |
| B. | Cadmium |
| C. | Magnesium |
| D. | Aluminium |
| Answer» D. Aluminium | |
| 793. |
Reactor used in the production of polyvinyl chloride (PVC) is made of |
| A. | nickel or glass lined steel |
| B. | aluminium |
| C. | tantalum |
| D. | lead |
| Answer» B. aluminium | |
| 794. |
Mixing vessel used for the chlorination of methane to produce methyl chloride is made of |
| A. | copper |
| B. | cast iron |
| C. | aluminium |
| D. | high carbon steel |
| Answer» C. aluminium | |
| 795. |
Which one occupies the lowermost position in the electromotive series of metals ? |
| A. | Aluminium |
| B. | Noble metals (Ag, Pt, Au) |
| C. | Zinc |
| D. | Alkali metals (K, Na, Li) |
| Answer» C. Zinc | |
| 796. |
Cold worked steel parts are normally subjected to |
| A. | normalising |
| B. | hardening |
| C. | annealing |
| D. | shot peening |
| Answer» D. shot peening | |
| 797. |
Silico-manganese steels (containing 0.7% Mn, 0.5% C and 2% Si) |
| A. | do not require heat treatment for any of its applications. |
| B. | are used for leaf and coiled springs. |
| C. | do not have good resilience properties. |
| D. | is tempered at 850°C. |
| Answer» C. do not have good resilience properties. | |
| 798. |
Alinco, which is a aluminium-cobalt-nickel steel, is used for making |
| A. | surgical instruments |
| B. | powerful magnets |
| C. | chemical equipments |
| D. | boiler tubes |
| Answer» C. chemical equipments | |
| 799. |
'Semi steel' is |
| A. | produced by adding 10-20% steel to the cupola charge. |
| B. | stronger than cast iron. |
| C. | both (a) and (b). |
| D. | neither (a) nor (b). |
| Answer» D. neither (a) nor (b). | |
| 800. |
__________ is used for examining the macro-structure of a material. |
| A. | Metallurgical microscope |
| B. | Optical microscope |
| C. | X-rays |
| D. | Visual inspection by naked eye |
| Answer» E. | |