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.
| 651. |
Presence of nitrogen in steel |
| A. | makes it brittle. |
| B. | increases its strength. |
| C. | increases its hardness. |
| D. | is desirable. |
| Answer» B. increases its strength. | |
| 652. |
Glass lined vessels are not used for handling/storing |
| A. | dilute H2SO4 |
| B. | dilute HNO3 |
| C. | dilute HCl |
| D. | hydroflouric acid |
| Answer» E. | |
| 653. |
The crystal structure of most of the common metals is |
| A. | orthorhombic |
| B. | cubic |
| C. | hexagonal |
| D. | none of these |
| Answer» C. hexagonal | |
| 654. |
In a plate type heat exchanger, heat transfer plates are never made of |
| A. | stainless steel |
| B. | cast iron |
| C. | titanium |
| D. | hastealloy C |
| Answer» C. titanium | |
| 655. |
Which of the following material of construction may be recommended by a chemical engineer for handling a gaseous chlorine (dry or wet) stream in a fluid flow system ? |
| A. | High silicon iron, silicon rubber, Kel-F and teflon. |
| B. | Mild steel and stainless steel. |
| C. | Cast iron, tin and aluminium. |
| D. | Copper, nickel and monel. |
| Answer» B. Mild steel and stainless steel. | |
| 656. |
Liners of a ball mill are never made of |
| A. | lead |
| B. | alloy steel |
| C. | rubber or ceramic material |
| D. | cast iron |
| Answer» B. alloy steel | |
| 657. |
Cast iron detachable joint is used in __________ pipes. |
| A. | steel |
| B. | cast iron |
| C. | asbestos cement |
| D. | reinforced cement concrete |
| Answer» B. cast iron | |
| 658. |
The heat treatment process applied to cold formed steel parts is |
| A. | normalising |
| B. | tempering |
| C. | artificial ageing |
| D. | solution annealing |
| Answer» E. | |
| 659. |
The 'bomb' in the bomb calorimeter is made of |
| A. | molybdenum stainless steel |
| B. | mild steel |
| C. | high silicon iron (14% Si) |
| D. | copper |
| Answer» B. mild steel | |
| 660. |
Rubber lined vessels are corroded by the action of |
| A. | aqua regia |
| B. | chloroform |
| C. | sulphuric acid (95%) |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 661. |
Which of the following exercises most powerful influence on the mechanical properties of steel ? |
| A. | Manganese |
| B. | Carbon |
| C. | Phosphorous |
| D. | Silicon |
| Answer» C. Phosphorous | |
| 662. |
Galvanising is not a zinc diffusion process. A zinc diffusion process is termed as |
| A. | sheradising |
| B. | parkerising |
| C. | anodising |
| D. | none of these |
| Answer» B. parkerising | |
| 663. |
Cast iron vessels are not suitable for the storage of |
| A. | freon |
| B. | H2SO4 (95%) at room temperature |
| C. | H2SO4 (fuming) |
| D. | wet SO2 |
| Answer» E. | |
| 664. |
Which of the following is not an alloy of copper and tin ? |
| A. | Bell metal |
| B. | Gun metal |
| C. | Admiralty gun metal |
| D. | Monel metal |
| Answer» E. | |
| 665. |
The preferred material of construction for storage tanks for 98% sulphuric acid is |
| A. | aluminium |
| B. | lead |
| C. | stainless steel 316 |
| D. | mild steel |
| Answer» C. stainless steel 316 | |
| 666. |
A material capable of undergoing large permanent deformation, when subjected to tension is termed as |
| A. | friable |
| B. | ductile |
| C. | brittle |
| D. | none of these |
| Answer» C. brittle | |
| 667. |
Which of the following commercial metals is most abundantly found in India ? |
| A. | Copper |
| B. | Aluminium |
| C. | Nickel |
| D. | Zinc |
| Answer» C. Nickel | |
| 668. |
Vessels made of __________ can be used to store dry chlorine. |
| A. | thermoplastic materials |
| B. | nickel |
| C. | steel or iron |
| D. | none of these |
| Answer» D. none of these | |
| 669. |
A material is able to retain the deformation permanently by virtue of its |
| A. | elasticity |
| B. | plasticity |
| C. | ductility |
| D. | malleability |
| Answer» C. ductility | |
| 670. |
When iron is rusted, it is |
| A. | converted to a fine powder |
| B. | reduced |
| C. | oxidised |
| D. | none of these |
| Answer» D. none of these | |
| 671. |
Which of the following is not an alloy of nickel and chromium ? |
| A. | Inconel |
| B. | Hastealloy |
| C. | Nimonic alloys |
| D. | Duralumin |
| Answer» E. | |
| 672. |
Presence of 0.3 to 0.5% arsenic in copper increases its |
| A. | ductility |
| B. | malleability |
| C. | tenacity & hardness |
| D. | electrical conductivity |
| Answer» D. electrical conductivity | |
| 673. |
__________ iron is produced, when molten pig iron is chilled suddenly. |
| A. | White cast |
| B. | Grey cast |
| C. | Wrought |
| D. | none of these |
| Answer» B. Grey cast | |
| 674. |
Which of the following alloy steels has the energy saving properties making it suitable for use in electrical machines ? |
| A. | Silicon steel |
| B. | Chromium steel |
| C. | Molybdenum steel |
| D. | None of these |
| Answer» B. Chromium steel | |
| 675. |
Which of the following has no effect on the carbide forming tendency in steels ? |
| A. | Molybdenum |
| B. | Phosphorus |
| C. | Chromium |
| D. | Vanadium |
| Answer» C. Chromium | |
| 676. |
Lead lined equipments & vessels are suitable for handling |
| A. | hydrochloric acid (10%). |
| B. | nitric acid. |
| C. | sulphuric acid upto 60°C. |
| D. | all (a), (b) and (c). |
| Answer» D. all (a), (b) and (c). | |
| 677. |
Common house hold glass (i.e., soda-lime glass) is a/an __________ material. |
| A. | fully crystalline |
| B. | partly crystalline |
| C. | amorphous |
| D. | none of these |
| Answer» C. amorphous | |
| 678. |
Constantan used in thermocouples is an alloy of |
| A. | iron & copper |
| B. | copper & aluminium |
| C. | lead & tin |
| D. | none of these |
| Answer» E. | |
| 679. |
Which of the following is the most suitable material of construction for evaporator & its tubes for concentrating NaOH solution to 70%? |
| A. | Cast iron |
| B. | Steel |
| C. | Nickel |
| D. | Karbate |
| Answer» D. Karbate | |
| 680. |
A measure of toughness of a material is its |
| A. | percentage elongation |
| B. | yield strength |
| C. | ultimate strength |
| D. | area under stress-strain diagram |
| Answer» C. ultimate strength | |
| 681. |
Manganese in steel affects its |
| A. | ductility |
| B. | tensile strength |
| C. | hardness |
| D. | none of these |
| Answer» C. hardness | |
| 682. |
Sulphuric acid pickling tanks are lined with |
| A. | nickel |
| B. | rubber |
| C. | aluminium |
| D. | glass |
| Answer» C. aluminium | |
| 683. |
Urea autoclave is made of |
| A. | cast iron |
| B. | refractory blocks |
| C. | stainless steel |
| D. | lead lined steel |
| Answer» D. lead lined steel | |
| 684. |
__________ alloys have the highest specific strength of all the structural materials out of the following. |
| A. | Magnetic steel |
| B. | Titanium |
| C. | Chromium |
| D. | Magnesium |
| Answer» C. Chromium | |
| 685. |
Balls in a ball mill are usually made of |
| A. | steel |
| B. | cast iron |
| C. | stainless steel |
| D. | bronze |
| Answer» B. cast iron | |
| 686. |
Vycor, a widely used material for making 'thermal wells' in temperature measurement, is a |
| A. | cermet |
| B. | glass |
| C. | thermosetting plastic |
| D. | metallic alloy |
| Answer» C. thermosetting plastic | |
| 687. |
Which of the following crystal structures characterises the ferritic stainless steel ? |
| A. | Face centred cubic |
| B. | Body centred cubic |
| C. | Simple hexagonal |
| D. | None of these |
| Answer» C. Simple hexagonal | |
| 688. |
An elastic behaviour of materials is expressed in terms of |
| A. | hysterisis loop area |
| B. | stress-strain curve |
| C. | relaxation time |
| D. | none of these |
| Answer» D. none of these | |
| 689. |
The formation of oxide film on a metal due to atmospheric exposure reduces its |
| A. | toughness |
| B. | stiffness |
| C. | creep limit |
| D. | all (a), (b) & (c) |
| Answer» D. all (a), (b) & (c) | |
| 690. |
Which of the following has a very high carbide forming tendency in steels ? |
| A. | Silicon |
| B. | Chromium |
| C. | Nickel |
| D. | Vanadium |
| Answer» E. | |
| 691. |
With increase in the carbon percentage in the steel, its |
| A. | hardness increases. |
| B. | ductility reduces. |
| C. | tensile strength increases. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 692. |
For spinning viscose rayon, the extrusion spinnerettes are made of |
| A. | platinum or gold alloys |
| B. | high carbon steel |
| C. | aluminium |
| D. | nickel |
| Answer» B. high carbon steel | |
| 693. |
The specific gravity of coal depends mainly on its __________ content. |
| A. | carbon |
| B. | volatile matter |
| C. | ash |
| D. | moisture |
| Answer» D. moisture | |
| 694. |
Which has the maximum melting point out of the following ? |
| A. | Steel |
| B. | Cast iron |
| C. | Stainless steel |
| D. | Wrought iron |
| Answer» E. | |
| 695. |
Metal at the top of the electromotive series is |
| A. | least active |
| B. | most stable |
| C. | most active |
| D. | most noble |
| Answer» D. most noble | |
| 696. |
Aqueous nitric acid is stored in __________ vessel. |
| A. | plain carbon steel |
| B. | stainless steel |
| C. | cast iron |
| D. | thermosetting plastic material |
| Answer» D. thermosetting plastic material | |
| 697. |
The process of coating steel sheets by zinc to improve its corrosion resistance is called |
| A. | calorising |
| B. | galvanising |
| C. | zincification |
| D. | tempering |
| Answer» C. zincification | |
| 698. |
Kel-F is a material, which is |
| A. | chemically known as polychlorotrifluor-oethylene (PTFE). |
| B. | having excellent chemical & high temperature resistance (upto 200°C). |
| C. | having elastomeric properties. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 699. |
Cermets are used for making |
| A. | cutting tools |
| B. | abrasives |
| C. | both (a) & (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 700. |
The chlorinator used in the manufacture of DDT is made of |
| A. | glass |
| B. | glass lined steel |
| C. | teflon |
| D. | bakelite |
| Answer» C. teflon | |