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.
| 551. |
Which of the following is an alloy of nickel and copper? |
| A. | Hastelloy |
| B. | Duriron |
| C. | Monel |
| D. | Inconel |
| Answer» D. Inconel | |
| 552. |
Which of the following is the lightest of engineering metals? |
| A. | Magnesium |
| B. | Aluminium |
| C. | Titanium |
| D. | Tin |
| Answer» B. Aluminium | |
| 553. |
Most suitable material for high pressure vessel operating at 500 atm. and 500° C is# |
| A. | Molybdenum stainless steel |
| B. | 18/8 stainless steel |
| C. | Mild steel |
| D. | High silicon iron (14% Si) |
| Answer» B. 18/8 stainless steel | |
| 554. |
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 | |
| 555. |
Which is an amorphous material? |
| A. | Glass |
| B. | Mica |
| C. | Brass |
| D. | Cast iron |
| Answer» B. Mica | |
| 556. |
Which of the following mechanical properties of a material is most structure insensitive? |
| A. | Modulus of elasticity (young |
| B. | Toughness |
| C. | Percentage reduction of area |
| D. | Tensile strength |
| Answer» B. Toughness | |
| 557. |
Which of the following alloys does not contain nickel? |
| A. | Chlorinet - 2 alloy |
| B. | Monel |
| C. | Inconel |
| D. | Babbit metal |
| Answer» E. | |
| 558. |
Which of the following materials may prove unsuitable for handling acetic acid (glacial & anhydrous) at 40°C?# |
| A. | Silicone rubber, teflon, procelain and wood |
| B. | Nickel, monel, stainless steel and graphite |
| C. | Aluminium, copper, high silicon iron |
| D. | Brass, cast iron, mild steel and tin |
| Answer» E. | |
| 559. |
Which of the following is produced by addition polymerisation? |
| A. | Polybutadiene |
| B. | Phenol formaldehyde |
| C. | Urea-formaldehyde |
| D. | Dacron |
| Answer» B. Phenol formaldehyde | |
| 560. |
Straight silicon steel (containing Si from 0.5 to 5%) because of their low hysterisis loss and high magnetic permeability are used for electrical appliances. Which of the following electrical appliances made of silicon steel contains maximum percentage of silicon (about 4%)? |
| A. | Armature of small motors/generators |
| B. | Generators and small motors |
| C. | Induction motors |
| D. | High frequency transformers |
| Answer» E. | |
| 561. |
Tin in its pure form is used for making |
| A. | cans for food packing. |
| B. | collapsible tubes for toilet preparations. |
| C. | foil for wrapping cheese. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 562. |
Stainless steel is not corroded by |
| A. | hydrochloric acid (10%). |
| B. | nitric acid (10%). |
| C. | sulphuric acid (10%). |
| D. | saturated brine. |
| Answer» C. sulphuric acid (10%). | |
| 563. |
Ferric stainless steels compared to austenitic stainless steels |
| A. | have lower corrosion resistance. |
| B. | are harder to fabricate. |
| C. | are less ductile and hence less suitable for cold pressing. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 564. |
High resistance electrical heating elements/wire are not made of |
| A. | marageing steel |
| B. | nimonic alloys |
| C. | kanthal wire |
| D. | nichrome |
| Answer» B. nimonic alloys | |
| 565. |
Which of the following would not be a suitable material of construction for handling aqueous hydrofluoric acid (HF) at 100°C ?$ |
| A. | Monel |
| B. | Stainless steel |
| C. | Graphite |
| D. | Kel-F and teflon |
| Answer» C. Graphite | |
| 566. |
Hydrocyanic acid is not shipped in |
| A. | cast iron vessels. |
| B. | steel cylinders. |
| C. | aluminium containers. |
| D. | monel drums. |
| Answer» B. steel cylinders. | |
| 567. |
Glass is corroded by |
| A. | fluorine (dry or wet) |
| B. | sulphuric acid |
| C. | phosphoric acid |
| D. | none of these |
| Answer» B. sulphuric acid | |
| 568. |
Which of the following is not an alloy of copper ? |
| A. | Muntz metal |
| B. | Admirability gun metal |
| C. | German silver |
| D. | Pewter metal |
| Answer» E. | |
| 569. |
18/8 stainless steel means, that it contains |
| A. | 18% chromium and 8% nickel. |
| B. | 18% chromium and 8% molybdenum. |
| C. | 18% nickel and 8% chromium. |
| D. | 18% molybdenum and 8% chromium. |
| Answer» B. 18% chromium and 8% molybdenum. | |
| 570. |
Tin coating is not done by |
| A. | vaporising |
| B. | hot dipping |
| C. | electro deposition |
| D. | spraying |
| Answer» B. hot dipping | |
| 571. |
Approximate value of the modulus of elasticity for steel is about __________ x l06kg/cm2. |
| A. | 0.5 |
| B. | 2 |
| C. | 40 |
| D. | 75 |
| Answer» C. 40 | |
| 572. |
Super conductors are those substances, which |
| A. | offer no resistance to current flow. |
| B. | conduct electricity at low temperature. |
| C. | offer high resistance to current flow. |
| D. | conduct electricity at high temperature. |
| Answer» B. conduct electricity at low temperature. | |
| 573. |
H2SO4 (< 50% concentration) is corrosive to |
| A. | aluminium, mild steel, stainless steel, concrete & tin. |
| B. | copper, cast iron & high silicon iron (14% Si). |
| C. | rubber (butyl and hard), silicone rubber & teflon. |
| D. | glass, graphite, porcelain & stoneware. |
| Answer» B. copper, cast iron & high silicon iron (14% Si). | |
| 574. |
Which of the following is the hardest ? |
| A. | Cementite |
| B. | Pearlite |
| C. | Austenite |
| D. | Ferrite |
| Answer» D. Ferrite | |
| 575. |
German silver is an alloy of copper, nickel and |
| A. | zinc |
| B. | silver |
| C. | tin |
| D. | lead |
| Answer» B. silver | |
| 576. |
Light weight metallic alloy used in aircraft industry is |
| A. | aluminium |
| B. | high silicon (14%) iron |
| C. | duralumin |
| D. | phosphor bronze |
| Answer» D. phosphor bronze | |
| 577. |
Tubes of multiple effect evaporator used for concentration of sugar cane juice are made of |
| A. | nickel |
| B. | copper |
| C. | stainless steel |
| D. | brass |
| Answer» C. stainless steel | |
| 578. |
The heat treatment process to which castings and the steel balls produced by cold heading are subjected is |
| A. | tempering |
| B. | normalising |
| C. | annealing |
| D. | none of these |
| Answer» C. annealing | |
| 579. |
Most suitable material for high pressure vessel operating at 500 atm. and 500° C is$ |
| A. | molybdenum stainless steel. |
| B. | 18/8 stainless steel. |
| C. | mild steel. |
| D. | high silicon iron (14% Si). |
| Answer» B. 18/8 stainless steel. | |
| 580. |
Which of the following is produced by condensation polymerisation ? |
| A. | Bakelite |
| B. | Polythene |
| C. | Poly vinyl chloride |
| D. | Polystyrene |
| Answer» B. Polythene | |
| 581. |
Purity of electrical grade aluminium should be ‚â• __________ percent.$ |
| A. | 95 |
| B. | 99.5 |
| C. | 85 |
| D. | 90 |
| Answer» C. 85 | |
| 582. |
Nickel base alloys with __________ are known as monel metal. |
| A. | zinc |
| B. | tin |
| C. | copper |
| D. | molybdenum |
| Answer» D. molybdenum | |
| 583. |
Silicone rubber is not resistant to the corrosive action of |
| A. | sulphuric acid (10%) |
| B. | sulphuric acid (95%) |
| C. | ether |
| D. | both (b) and (c) |
| Answer» E. | |
| 584. |
Maximum consumption of lead is in the manufacture of |
| A. | storage batteries. |
| B. | solder alloys. |
| C. | electric cable sheathing. |
| D. | lead lined vessels. |
| Answer» B. solder alloys. | |
| 585. |
Presence of silicon in steel |
| A. | is in the form of free Si. |
| B. | indicates that steel is not deoxidised properly. |
| C. | decreases the blow holes formation tendency in castings. |
| D. | none of these. |
| Answer» D. none of these. | |
| 586. |
Out of the following, copper vessels are the most suitable for the storage of |
| A. | bromine. |
| B. | dry chlorine & dry fluorine. |
| C. | nitric acid (95% and fuming). |
| D. | phosphoric acid (95%) & sulphuric acid (95% and fuming). |
| Answer» C. nitric acid (95% and fuming). | |
| 587. |
As the impurities are oxidised, the melting point of iron |
| A. | decreases. |
| B. | remains unchanged. |
| C. | increases. |
| D. | may increase or decrease ; unpredictable. |
| Answer» D. may increase or decrease ; unpredictable. | |
| 588. |
Slow plastic deformation of metals under a constant stress is termed as __________ failure. |
| A. | fatigue |
| B. | endurance |
| C. | creep |
| D. | none of these |
| Answer» D. none of these | |
| 589. |
Creep is not exhibited at low temperature by |
| A. | rubber |
| B. | acrylics |
| C. | lead |
| D. | plastics |
| Answer» D. plastics | |
| 590. |
A material capable of undergoing large permanent deformation, when subjected to compression is termed as |
| A. | malleable |
| B. | ductile |
| C. | brittle |
| D. | none of these |
| Answer» B. ductile | |
| 591. |
Very high sulphur in pig iron makes |
| A. | its casting unsound. |
| B. | its hard and machinable. |
| C. | its brittle and malleable. |
| D. | all (a), (b) & (c) |
| Answer» B. its hard and machinable. | |
| 592. |
The material of construction of pressure mills used for squeezing out the juice from sugar cane is |
| A. | stainless steel |
| B. | cast iron |
| C. | mild steel |
| D. | monel |
| Answer» C. mild steel | |
| 593. |
Cast iron is a __________ material. |
| A. | brittle |
| B. | ductile |
| C. | tough |
| D. | malleable |
| Answer» B. ductile | |
| 594. |
Galvanising is generally done on |
| A. | non-ferrous metals |
| B. | low carbon steel |
| C. | stainless steel |
| D. | cast iron |
| Answer» C. stainless steel | |
| 595. |
Cold work tool steel should have |
| A. | high toughness |
| B. | poor hardenability |
| C. | high wear resistance |
| D. | all (a), (b) & (c) |
| Answer» D. all (a), (b) & (c) | |
| 596. |
Cast iron is |
| A. | used for making shock resisting parts. |
| B. | manufactured in cupola and is brittle. |
| C. | having compressive strength more than its tensile strength. |
| D. | all (a), (b) & (c) |
| Answer» E. | |
| 597. |
Which is the purest form of iron ? |
| A. | Wrought iron |
| B. | Pig iron |
| C. | Bessemer iron |
| D. | Grey iron |
| Answer» B. Pig iron | |
| 598. |
Combination of metals and ceramics are called |
| A. | metalloy |
| B. | cermets |
| C. | pellets |
| D. | non-crystalline ceramics |
| Answer» C. pellets | |
| 599. |
Duralumin is an alloy of |
| A. | aluminium, copper and manganese. |
| B. | aluminium, nickel and silicon. |
| C. | aluminium and nickel. |
| D. | none of these. |
| Answer» B. aluminium, nickel and silicon. | |
| 600. |
Plastics are |
| A. | used in very high temperature applications. |
| B. | non-biodegradable. |
| C. | not suitable for drainage pipe manufacture. |
| D. | all (a), (b) & (c). |
| Answer» C. not suitable for drainage pipe manufacture. | |