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.
| 601. |
Fermenter used in the production of pen-cillin by deep fermentation proces is a __________ lined steel vessel |
| A. | rubber |
| B. | monel |
| C. | glass |
| D. | nickel |
| Answer» D. nickel | |
| 602. |
Monel metal is an alloy of |
| A. | molybdenum and nickel. |
| B. | nickel and copper. |
| C. | molybdenum and aluminium. |
| D. | molybdenum and zinc. |
| Answer» C. molybdenum and aluminium. | |
| 603. |
Presence of even 0.005% of __________ in copper makes it highly brittle, rendering it useless for wire-drawing. |
| A. | oxygen |
| B. | arsenic |
| C. | antimony |
| D. | bismuth |
| Answer» E. | |
| 604. |
Pure nickel is |
| A. | ferromagnetic above its curie point (i.e., 415°C). |
| B. | having h.c.p. crystal lattice. |
| C. | ferromagnetic at room temperature. |
| D. | not resistant to oxidation at high temperature. |
| Answer» D. not resistant to oxidation at high temperature. | |
| 605. |
Fatigue failure of a material may occur, when it is subjected to __________ stress. |
| A. | fluctuating |
| B. | tensile |
| C. | compressive |
| D. | torsion |
| Answer» B. tensile | |
| 606. |
Condenser tubes are not made of |
| A. | cartridge brass |
| B. | muntz brass |
| C. | wood metal |
| D. | aluminium brass alloy |
| Answer» D. aluminium brass alloy | |
| 607. |
Mild steel storage vessels are suitable for the storage of |
| A. | anhydrous ammonia |
| B. | fatty acids |
| C. | hydrochloric acid (95%) |
| D. | sulphuric acid (25%) |
| Answer» B. fatty acids | |
| 608. |
The largest consumption of zinc for alloys is in the making of |
| A. | bearing metal |
| B. | brasses |
| C. | brazing solder |
| D. | die casting alloys |
| Answer» C. brazing solder | |
| 609. |
Which is an amorphous material ? |
| A. | Glass |
| B. | Mica |
| C. | Brass |
| D. | Cast iron |
| Answer» B. Mica | |
| 610. |
Age hardening is concerned with |
| A. | copper |
| B. | brass |
| C. | duralumin |
| D. | silver |
| Answer» D. silver | |
| 611. |
For handling sulphuric acid of 95% strength, the suitable material of construction for pipes is |
| A. | stainless steel |
| B. | cast iron |
| C. | aluminium |
| D. | nickel |
| Answer» C. aluminium | |
| 612. |
Which of the following constituents of cast iron is mainly responsible for imparting it an anti-corrosive property ? |
| A. | Silicon |
| B. | Phosphorus |
| C. | Sulphur |
| D. | None of these |
| Answer» B. Phosphorus | |
| 613. |
Which of the following is the lightest of engineering metals ? |
| A. | Magnesium |
| B. | Aluminium |
| C. | Titanium |
| D. | Tin |
| Answer» B. Aluminium | |
| 614. |
Hardened steel is softened by |
| A. | normalising |
| B. | tempering |
| C. | annealing |
| D. | carburising |
| Answer» C. annealing | |
| 615. |
Most common stainless steel type 316, which is highly resistant to corrosion contains |
| A. | 16-13% Cr 10-14% Ni and 2-3% Mo. |
| B. | 20-22% Cr, and 8-10% Ni. |
| C. | 2-4% Cr, 22% NI and 2-4% Mo. |
| D. | none of these. |
| Answer» B. 20-22% Cr, and 8-10% Ni. | |
| 616. |
Galvanising (i.e., zinc coating) of steel sheets is done to |
| A. | prevent its rusting by contact with corrosive atmosphere. |
| B. | protect the base metal by cathodic protection. |
| C. | both(a) & (b). |
| D. | neither (a) nor (b). |
| Answer» D. neither (a) nor (b). | |
| 617. |
Which of the following is an alloy of nickel and copper ? |
| A. | Hastelloy |
| B. | Duriron |
| C. | Monel |
| D. | Inconel |
| Answer» D. Inconel | |
| 618. |
Duriron is |
| A. | acid resistant, brittle and very hard. |
| B. | high silicon iron. |
| C. | prone to breakage due to thermal expansion because of its very high co-efficient of thermal expansion. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 619. |
Cast iron has |
| A. | very high tensile strenth. |
| B. | high ductility. |
| C. | high malleability. |
| D. | elastic limit close to ultimate breaking strength. |
| Answer» E. | |
| 620. |
A hardened steel essentially contains |
| A. | sorbite |
| B. | troostite |
| C. | martensite |
| D. | none of these |
| Answer» D. none of these | |
| 621. |
Molten phthalic anhydride is stored in a/an __________ vessel. |
| A. | aluminium |
| B. | nickel clad steel |
| C. | lead lined steel |
| D. | glass lined steel. |
| Answer» B. nickel clad steel | |
| 622. |
Babbit metal used for making bearings should have |
| A. | high-co-efficient of friction between journal and bearing. |
| B. | ability to retain lubricant on its surface. |
| C. | low co-efficient of friction between journal and bearing. |
| D. | both(b) & (c). |
| Answer» B. ability to retain lubricant on its surface. | |
| 623. |
Which of the following is a light alloy ? |
| A. | Monel metal |
| B. | Dow metal |
| C. | German silver |
| D. | Babbit metal |
| Answer» C. German silver | |
| 624. |
Bronze is an alloy of copper and |
| A. | lead |
| B. | tin |
| C. | nickel |
| D. | zinc |
| Answer» C. nickel | |
| 625. |
All materials obey Hooke's law within elastic limit. When elastic limit is reached, the tensile strain |
| A. | increases very quickly. |
| B. | decreases very quickly. |
| C. | increases in proportion to stress. |
| D. | decreases in proportion to stress. |
| Answer» B. decreases very quickly. | |
| 626. |
Low carbon steels are those in which carbon percentage is around |
| A. | 0.1 to 0.35 |
| B. | 0.4 to 0.7 |
| C. | 0.8 to 1.5 |
| D. | 1.5 to 2 |
| Answer» B. 0.4 to 0.7 | |
| 627. |
A metallic alloy in general as compared to their pure metal components is |
| A. | more corrosion resistant. |
| B. | having higher melting point. |
| C. | having lower hardness, reactivity and fusibility. |
| D. | having lower electrical conductivity. |
| Answer» B. having higher melting point. | |
| 628. |
The presence of impurities in iron |
| A. | increases its melting point. |
| B. | does not affect its melting point. |
| C. | decreases its melting point. |
| D. | makes it malleable. |
| Answer» D. makes it malleable. | |
| 629. |
Dip stick used for measuring the level of petro fuels (e.g. petrol, diesel, fuel oil etc.) in the storage tank is usually made of |
| A. | brass |
| B. | copper |
| C. | high carbon steel |
| D. | aluminium |
| Answer» B. copper | |
| 630. |
Addition of tungsten to steel imparts |
| A. | magnetic properties |
| B. | cutting hardness |
| C. | corrosion resistance |
| D. | ductility |
| Answer» C. corrosion resistance | |
| 631. |
The digester of a Gobar gas plant is a |
| A. | mild steel drum |
| B. | stainless steel vessel |
| C. | masonry well |
| D. | cast iron vessel |
| Answer» D. cast iron vessel | |
| 632. |
Anodic material used for the cathodic protection of underground buried steel pipeline is |
| A. | nickel or copper |
| B. | zinc or magnesium |
| C. | bronze |
| D. | brass |
| Answer» C. bronze | |
| 633. |
Cast iron and steel pipes are produced by __________ casting. |
| A. | die |
| B. | investment |
| C. | slush |
| D. | true centrifugal |
| Answer» E. | |
| 634. |
Addition of 2% nickel in steel makes it suitable for making |
| A. | electronic valves |
| B. | boiler plates, rivets etc. |
| C. | turbine blades |
| D. | connecting rod |
| Answer» C. turbine blades | |
| 635. |
Ball bearings are generally made of |
| A. | plain carbon steel |
| B. | chrome carbon steel |
| C. | stainless steel |
| D. | malleable cast iron |
| Answer» C. stainless steel | |
| 636. |
Steel pipes are normally manufactured by __________ process. |
| A. | extrusion |
| B. | cold working |
| C. | forging |
| D. | electroforming |
| Answer» B. cold working | |
| 637. |
Spray dryer for evaporating milk to produce milk powder is made of |
| A. | lead lined steel |
| B. | stainless steel |
| C. | aluminium |
| D. | cast iron |
| Answer» C. aluminium | |
| 638. |
Concrete tank can be used to store |
| A. | alum |
| B. | ferrous sulphate |
| C. | sulphuric acid |
| D. | saturated brine |
| Answer» E. | |
| 639. |
Presence of even very minute amount (say 0.1%) of __________ in copper, reduces its electrical conductivity very seriously. |
| A. | bismuth |
| B. | arsenic |
| C. | antimony |
| D. | both (b) and (c) |
| Answer» E. | |
| 640. |
Tank furnace used for melting of glass is made of |
| A. | mild steel |
| B. | cast iron |
| C. | refractory blocks |
| D. | stainless steel |
| Answer» D. stainless steel | |
| 641. |
Molybdenum steels containing 0.15 to 0.40% molybdenum |
| A. | are prone to temper brittleness. |
| B. | are used for automobile parts like gears, axle, shaft, bearings etc. |
| C. | have very poor fatigue resistance. |
| D. | do not contain nickel or chromium or both. |
| Answer» C. have very poor fatigue resistance. | |
| 642. |
__________ does not contain copper as an alloying element, |
| A. | Nichrome |
| B. | Manganin |
| C. | Perminivar |
| D. | Monel metal |
| Answer» B. Manganin | |
| 643. |
Platinum and silver are corroded by |
| A. | caustic soda solution |
| B. | phosphoric acid |
| C. | sulphuric acid (10%) |
| D. | none of these |
| Answer» E. | |
| 644. |
Water gas generator is made of |
| A. | carbon steel-brick lined |
| B. | stainless steel-lead lined |
| C. | cast iron |
| D. | high carbon steel-procelain lined |
| Answer» B. stainless steel-lead lined | |
| 645. |
Brass tubes are used in the manufacture of tubes of evaporators used in sugar and salt industries, mainly because of its |
| A. | high co-efficient of thermal expansion. |
| B. | low thermal conductivity. |
| C. | high corrosion resistance. |
| D. | all (a), (b) and (c). |
| Answer» D. all (a), (b) and (c). | |
| 646. |
Nickel is a __________ material. |
| A. | ferromagnetic |
| B. | diamagnetic |
| C. | paramagnetic |
| D. | none of these |
| Answer» B. diamagnetic | |
| 647. |
Presence of high phosphorous in cast iron increases its |
| A. | fluidity |
| B. | melting point |
| C. | shrinkage |
| D. | tensile strength |
| Answer» B. melting point | |
| 648. |
Nitriding of steel is done (in electric furnace) at __________ °C.$ |
| A. | 510 |
| B. | 1720 |
| C. | 2210 |
| D. | 910 |
| Answer» B. 1720 | |
| 649. |
Presence of manganese in alloy steel improves its |
| A. | corrosion resistance. |
| B. | cutting ability. |
| C. | abrasion resistance & toughness. |
| D. | elasticity & creep resistance. |
| Answer» D. elasticity & creep resistance. | |
| 650. |
Which of the following is not a non-ferrous alloy ? |
| A. | Meehanite |
| B. | Magnalium |
| C. | Gun metal |
| D. | Muntz metal |
| Answer» B. Magnalium | |