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.
| 701. |
Fatigue failure of a material results from __________ stress. |
| A. | tensile |
| B. | compressive |
| C. | fluctuating |
| D. | none of these. |
| Answer» D. none of these. | |
| 702. |
A steel alloy containing 36% nickel is called __________ , which has a zero co-efficient of expansion. |
| A. | austenitic stainless steel |
| B. | heat resisting steel |
| C. | invar |
| D. | high speed steel |
| Answer» D. high speed steel | |
| 703. |
Which of the following pairs of elements may form an alloy ? |
| A. | Iron & carbon |
| B. | Iron & mercury |
| C. | Platinum & mercury |
| D. | None of these |
| Answer» B. Iron & mercury | |
| 704. |
Glass lined vessels are not used for handling |
| A. | dilute H2SO4 |
| B. | dilute HNO3 |
| C. | dilute HCI |
| D. | hydroflouric acid |
| Answer» E. | |
| 705. |
Which one is remelted and poured into moulds to get cast iron ? |
| A. | Wrought iron |
| B. | Pig iron |
| C. | Low carbon steel |
| D. | Mild steel |
| Answer» C. Low carbon steel | |
| 706. |
Nickel made/clad equipments are suitable for handling |
| A. | ammonia (both aqueous & anhydrous). |
| B. | fruit juices, milk & its products and caustic soda solution. |
| C. | nitric acid & hydrochloric acid (conc). |
| D. | sulphuric acid (conc). |
| Answer» C. nitric acid & hydrochloric acid (conc). | |
| 707. |
__________ is added in stainless steel to prevent inter crystal corrosion. |
| A. | Vanadium |
| B. | Niobium |
| C. | Chromium |
| D. | Nickel |
| Answer» C. Chromium | |
| 708. |
A magnetic material becomes __________ above the Curie temperature. |
| A. | ferromagnetic |
| B. | diamagnetic |
| C. | paramagnetic |
| D. | none of these |
| Answer» D. none of these | |
| 709. |
Which of the following has the least carbon percentage ? |
| A. | Low carbon steel |
| B. | Mild steel |
| C. | Wrought iron |
| D. | White cast iron |
| Answer» D. White cast iron | |
| 710. |
An alloy used as thermocouple material comprises of 40% nickel and 60% copper. It is called |
| A. | constantan |
| B. | kanthal |
| C. | chromel |
| D. | German silver |
| Answer» B. kanthal | |
| 711. |
Materials having __________ lattice structure are usually most ductile. |
| A. | f.c.c. |
| B. | b.c.c. |
| C. | h.c.p. |
| D. | cubic |
| Answer» B. b.c.c. | |
| 712. |
Thermometer bulb & capillary in case of mercury filled pressure spring expansion thermometer is normally made of __________ as mercury does not amalgamate with it. |
| A. | copper |
| B. | copper alloys |
| C. | stainless steel |
| D. | monel |
| Answer» D. monel | |
| 713. |
Concentrated HCl at 30°C can be stored in a vessel made of$ |
| A. | PTFE and porcelain. |
| B. | cast iron and aluminium. |
| C. | stainless steel and high silicon cast iron. |
| D. | none of these. |
| Answer» B. cast iron and aluminium. | |
| 714. |
Polymerisation reactor used in the production of styrene butadiene rubber (SBR) is made of |
| A. | stainless steel or glass lined steel |
| B. | nickel clad steel |
| C. | high silicon cast iron |
| D. | aluminium |
| Answer» B. nickel clad steel | |
| 715. |
In drop forging process, the forging is done by dropping the __________ at high velocity. |
| A. | hammer |
| B. | workpiece. |
| C. | die with hammer |
| D. | weight on hammer |
| Answer» D. weight on hammer | |
| 716. |
Wood is corroded by |
| A. | hydrochloric acid |
| B. | SO2 (dry or wet) |
| C. | chlorine (dry or wet) |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 717. |
The process of heating the cold pressed metallic powder is called __________ in powder metallurgy. |
| A. | precipitation |
| B. | fusion |
| C. | sintering |
| D. | agglomeration |
| Answer» D. agglomeration | |
| 718. |
Acetaldehyde is produced by hydration of acetylene in a sulphuric acid solution of mercuric sulphate. Hydration tower is made of |
| A. | rubber lined mild steel |
| B. | lead lined mild steel |
| C. | aluminium |
| D. | cast iron |
| Answer» B. lead lined mild steel | |
| 719. |
Tin vessels are corroded by |
| A. | anhydrous ammonia |
| B. | aromatic solvents |
| C. | synthetic detergent solution |
| D. | none of these |
| Answer» E. | |
| 720. |
Among the tin containing alloys, __________ consumes the maximum amount of tin. |
| A. | solder |
| B. | white metal |
| C. | pewter matal |
| D. | bronzes |
| Answer» B. white metal | |
| 721. |
Which of the following undergoes granular fracture ? |
| A. | Wrought iron |
| B. | Steel |
| C. | Cast iron |
| D. | None of these |
| Answer» C. Cast iron | |
| 722. |
The most distinguished property of malleable cast iron is its high |
| A. | ductility |
| B. | hardness |
| C. | malleability |
| D. | none of these |
| Answer» B. hardness | |
| 723. |
Bearings subjected to light load are made of |
| A. | white metal |
| B. | phosphorous bronze |
| C. | monel |
| D. | silicon bronze |
| Answer» C. monel | |
| 724. |
Brass container is suitable for storing |
| A. | aqueous ammonia |
| B. | beer |
| C. | H2SO4(95%) |
| D. | phosphoric acid (95%) |
| Answer» C. H2SO4(95%) | |
| 725. |
Cast iron is having very high |
| A. | proximity between its elastic limit and ultimate breaking strength. |
| B. | ductility. |
| C. | tensile strength. |
| D. | all (a), (b) and (c). |
| Answer» B. ductility. | |
| 726. |
In hot wire aneomometer used for gas flow measurement, the wire is normally made of |
| A. | copper |
| B. | platinum |
| C. | constantan |
| D. | chromium |
| Answer» C. constantan | |
| 727. |
Mild steel is a/an __________ steel. |
| A. | low carbon |
| B. | medium carbon |
| C. | high carbon |
| D. | high alloy |
| Answer» B. medium carbon | |
| 728. |
The electrical conductivity of a __________ decreases with rise in temperature. |
| A. | metal/alloy |
| B. | semi-conductor |
| C. | dielectric |
| D. | none of these |
| Answer» B. semi-conductor | |
| 729. |
Which of the following is not a copper based alloy with nickel ? |
| A. | German silver |
| B. | Monel metal |
| C. | Inconel |
| D. | Constantan |
| Answer» D. Constantan | |
| 730. |
Nickel as a material of construction |
| A. | is used as an alloying element for both ferrous & non-ferrous alloys. |
| B. | is paramagnetic below 415° C (its Curie temperature). |
| C. | dimagnetic. |
| D. | has a body centred cubic (bcc) crystal lattice structure. |
| Answer» B. is paramagnetic below 415¬∞ C (its Curie temperature). | |
| 731. |
The main constituent of carborundum is __________ carbide. |
| A. | calcium |
| B. | silicon |
| C. | boron |
| D. | aluminium |
| Answer» C. boron | |
| 732. |
Wood metal is not used for making |
| A. | soft solder. |
| B. | casting for dental work. |
| C. | storage tank for storing brine and caustic soda. |
| D. | fusible safety plug for pressure cooker. |
| Answer» D. fusible safety plug for pressure cooker. | |
| 733. |
Most suitable material of construction for the storage of concentrated nitric acid is |
| A. | cast iron |
| B. | monel |
| C. | karbate |
| D. | aluminium or chromium alloys (Cr > 18% for cold acid) |
| Answer» E. | |
| 734. |
In the Contact process of sulphuric acid manufacture, 98% acid cooler is made of |
| A. | stainless steel |
| B. | cast iron |
| C. | lead lined steel |
| D. | rubber lined steel |
| Answer» C. lead lined steel | |
| 735. |
Hydrochloric acid absorber in made of |
| A. | cast iron |
| B. | mild steel |
| C. | karbate |
| D. | stainless steel |
| Answer» D. stainless steel | |
| 736. |
To improve the machinability of steel, it is generally subjected to |
| A. | spheroidising |
| B. | tempering |
| C. | normalising |
| D. | annealing |
| Answer» B. tempering | |
| 737. |
High speed steel should have high |
| A. | toughness |
| B. | wear resistance |
| C. | hardenability |
| D. | both(b) & (c) |
| Answer» E. | |
| 738. |
Rubber lined pumps can be used to pump |
| A. | caustic soda |
| B. | chlorinated brine |
| C. | hypochlorous acid |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 739. |
Thermosetting resins are those polymers, which |
| A. | do not increase in plasticity with rise in temperature. |
| B. | allow slip to occur between molecules. |
| C. | do not take on a permanent set. |
| D. | none of these. |
| Answer» B. allow slip to occur between molecules. | |
| 740. |
The softest material in Mho's scale (for measuring hardness) is |
| A. | talc |
| B. | gypsum |
| C. | rubber |
| D. | none of these |
| Answer» B. gypsum | |
| 741. |
A chemical change takes place when iron |
| A. | rusts |
| B. | melts |
| C. | is heated |
| D. | none of these |
| Answer» B. melts | |
| 742. |
Monel alloy is |
| A. | the costliest of all the alloys of nickel. |
| B. | not suitable for making kitchen utensils. |
| C. | used for making steam valves and turbine blades as it resists steam attack at high temperature. |
| D. | not used in cast and wrought forms. |
| Answer» D. not used in cast and wrought forms. | |
| 743. |
Telfon (PTFE) is corroded by |
| A. | hydrochloric acid (10%) |
| B. | hydrochloric acid (95%) |
| C. | sulphuric acid |
| D. | none of these |
| Answer» E. | |
| 744. |
A bearing metal should not have |
| A. | enough plasticity. |
| B. | low thermal conductivity. |
| C. | low co-efficient of friction. |
| D. | high toughness. |
| Answer» C. low co-efficient of friction. | |
| 745. |
Which of the following alloy steels is the most suitable for making gun barrels and projectiles ? |
| A. | Tungsten steel |
| B. | Molybdenum steel |
| C. | Nickel-chrome steel |
| D. | Cobalt steel |
| Answer» D. Cobalt steel | |
| 746. |
Containers made of high silicon cast iron (14% Si) are not suitable for the storage of |
| A. | acetic acid. |
| B. | benzoic & boric acids. |
| C. | phosphoric acid (95%) & sulphuric acid (95%). |
| D. | hydrochloric acid (concentrated). |
| Answer» E. | |
| 747. |
Zinc is highly __________ at room temperature. |
| A. | ductile |
| B. | resistant to atmospheric corrosion |
| C. | malleable |
| D. | brittle |
| Answer» C. malleable | |
| 748. |
Addition of nickel to copper improves its |
| A. | machinability |
| B. | ductility |
| C. | strength |
| D. | hardness |
| Answer» E. | |
| 749. |
Slow and progressive deformation of a material with time under constant stress is called |
| A. | creep |
| B. | erosion |
| C. | resilience |
| D. | none of these |
| Answer» B. erosion | |
| 750. |
Titanium metal |
| A. | exists in three allotropic forms. |
| B. | can not be welded. |
| C. | is used in oceanographic and space exploration applications. |
| D. | none of these. |
| Answer» D. none of these. | |