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.
| 301. |
_ Hastelloy C is a good material of construction in chemical process industry, since it is$? |
| A. | Highly corrosion resistant and is readily fabricated |
| B. | Relatively inexpensive although it can be fabricated with some difficulty |
| C. | Corrosion resistant to most alkalis, particularly because of its coper content |
| D. | Light and resists attack by acids |
| Answer» E. | |
| 302. |
_ Which of the following is not a copper based alloy with nickel?$? |
| A. | German silver |
| B. | Monel metal |
| C. | Inconel |
| D. | Constantan |
| Answer» D. Constantan | |
| 303. |
_ Metal at the top of the electromotive series is$? |
| A. | Least active |
| B. | Most stable |
| C. | Most active |
| D. | Most noble |
| Answer» D. Most noble | |
| 304. |
_ The main constituent of carborundum is __________ carbide.$? |
| A. | Calcium |
| B. | Silicon |
| C. | Boron |
| D. | Aluminium |
| Answer» C. Boron | |
| 305. |
_ Presence of high phosphorous in cast iron increases its$? |
| A. | Fluidity |
| B. | Melting point |
| C. | Shrinkage |
| D. | Tensile strength |
| Answer» B. Melting point | |
| 306. |
_ Babbit metal used for making bearings should have$? |
| 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 | |
| 307. |
_ Condenser tubes are not made of$? |
| A. | Cartridge brass |
| B. | Muntz brass |
| C. | Wood metal |
| D. | Aluminium brass alloy |
| Answer» D. Aluminium brass alloy | |
| 308. |
_ Chrome vanadium steels usually contain 0.8 to 1.1% Cr, 0.25 to 0.35% C and < 0.25% V. It is$? |
| A. | Used for making axle & shafts of aeroplanes, automobiles and locomotives |
| B. | Having poor fatigue resistance |
| C. | Having poor toughness |
| D. | Not helpful in producing cleaner steel due to oxidising action of vanadium |
| Answer» B. Having poor fatigue resistance | |
| 309. |
_ Softness of silver can be converted into hardness by alloying it with small quantity of$? |
| A. | Copper & nickel |
| B. | Zinc |
| C. | Aluminium |
| D. | Tin |
| Answer» B. Zinc | |
| 310. |
_ Stainless steel is not corroded by$? |
| A. | Hydrochloric acid (10%) |
| B. | Nitric acid (10%) |
| C. | Sulphuric acid (10%) |
| D. | Saturated brine |
| Answer» C. Sulphuric acid (10%) | |
| 311. |
_ Carbon content in plain carbon steel is __________ percent.$? |
| A. | 0.1 to 0.15 |
| B. | 0.35 to 0.45 |
| C. | 0.65 to 0.80 |
| D. | 0.85 to 1.2 |
| Answer» C. 0.65 to 0.80 | |
| 312. |
_ A hardened steel essentially contains$? |
| A. | Sorbite |
| B. | Troostite |
| C. | Martensite |
| D. | None of these |
| Answer» D. None of these | |
| 313. |
_ With increase in the carbon percentage in the steel, its$? |
| A. | Hardness increases |
| B. | Ductility reduces |
| C. | Tensile strength increases |
| D. | All of the above |
| Answer» E. | |
| 314. |
_ Hardened steel is softened by$? |
| A. | Normalising |
| B. | Tempering |
| C. | Annealing |
| D. | Carburising |
| Answer» C. Annealing | |
| 315. |
_ Which of the following crystal structures characterises the ferritic stainless steel?$? |
| A. | Face centred cubic |
| B. | Body centred cubic |
| C. | Simple hexagonal |
| D. | None of these |
| Answer» C. Simple hexagonal | |
| 316. |
_ Which of the following is not a non-ferrous alloy?$? |
| A. | Meehanite |
| B. | Magnalium |
| C. | Gun metal |
| D. | Muntz metal |
| Answer» B. Magnalium | |
| 317. |
_ A material no longer behaves elastically beyond$? |
| A. | Plastic limit |
| B. | Limiting load |
| C. | Elastic limit |
| D. | Breaking load |
| Answer» D. Breaking load | |
| 318. |
_ Graphite is a good$? |
| A. | Thermal & electrical insulator |
| B. | Conductor of heat |
| C. | Conductor of electricity |
| D. | Both B & C |
| Answer» E. | |
| 319. |
_ Which is the purest form of iron?$? |
| A. | Wrought iron |
| B. | Pig iron |
| C. | Bessemer iron |
| D. | Grey iron |
| Answer» B. Pig iron | |
| 320. |
_ Which of the following pairs of elements may form an alloy?$? |
| A. | Iron & carbon |
| B. | Iron & mercury |
| C. | Platinum & mercury |
| D. | None of these |
| Answer» B. Iron & mercury | |
| 321. |
_ Presence of nickel in steel improves its$? |
| A. | Corrosion resistance |
| B. | Cutting ability |
| C. | Wear resistance |
| D. | All of the above |
| Answer» B. Cutting ability | |
| 322. |
_ White cast iron is not$? |
| A. | Malleable |
| B. | Whitish in color |
| C. | Brittle |
| D. | Strong and hard |
| Answer» B. Whitish in color | |
| 323. |
_ Which of the following will have the highest melting point?$? |
| A. | Pig iron |
| B. | Mild steel |
| C. | Wrought iron |
| D. | High carbon steel |
| Answer» D. High carbon steel | |
| 324. |
_ Sulphur melting pit in the sulphuric acid plant is made of$? |
| A. | Lead lined stainless steel |
| B. | Cast iron |
| C. | Steel or cement-brick lined |
| D. | Hard wood |
| Answer» D. Hard wood | |
| 325. |
_ Corrosion involves exchange of electrons in __________ corrosion.$? |
| A. | Chemical |
| B. | Electrochemical |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 326. |
_ Chlorination of benzene is done to produce benzene hexachloride (a pesticide) in a photochemical reactor lined with$? |
| A. | Karbate |
| B. | Lead or glass |
| C. | Fireclay bricks |
| D. | PVC |
| Answer» C. Fireclay bricks | |
| 327. |
_ When the steel is subjected to normalising, its __________ decreases.$? |
| A. | Yield point |
| B. | Ductility |
| C. | Ultimate tensile strength (UTS) |
| D. | None of these |
| Answer» C. Ultimate tensile strength (UTS) | |
| 328. |
_ In the Kraft process of sulphate paper pulp manufacture, the black liquor and the white liquor storage tank is made of$? |
| A. | Concrete |
| B. | Wood |
| C. | Steel |
| D. | Porcelain |
| Answer» D. Porcelain | |
| 329. |
_ Which of the following has the least value of ultimate tensile strength (UTS)?$? |
| A. | Medium carbon steel |
| B. | High carbon steel |
| C. | Cast iron |
| D. | Wrought iron |
| Answer» D. Wrought iron | |
| 330. |
_ The range of Mho's scale of hardness is from$? |
| A. | 1 to 15 |
| B. | 1 to 8 |
| C. | 1 to 10 |
| D. | 0 to 10 |
| Answer» D. 0 to 10 | |
| 331. |
_ Bell metal is an alloy of$? |
| A. | Copper & zinc |
| B. | Copper & tin |
| C. | Copper & nickel |
| D. | Zinc & tin |
| Answer» C. Copper & nickel | |
| 332. |
_ Nickel (56%) and molybdenum (17%) alloys are called$? |
| A. | Monel |
| B. | Hastealloy C |
| C. | Inconel |
| D. | Bronzes |
| Answer» C. Inconel | |
| 333. |
_ How many atoms are there per unit cell in a body centred cubic lattice system?$? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 6 |
| Answer» B. 3 | |
| 334. |
_ Cast iron is having very high$? |
| A. | Proximity between its elastic limit and ultimate breaking strength |
| B. | Ductility |
| C. | Tensile strength |
| D. | All of the above |
| Answer» B. Ductility | |
| 335. |
_ The maximum percentage of chromium that can be added to steel is about$? |
| A. | 12 |
| B. | 18 |
| C. | 24 |
| D. | 30 |
| Answer» C. 24 | |
| 336. |
_ Caustic soda is transported in __________ lined containers.$? |
| A. | Glass |
| B. | Nickel |
| C. | Neoprene |
| D. | Either B or C |
| Answer» E. | |
| 337. |
_ Monel metal is an alloy of$? |
| A. | Molybdenum and nickel |
| B. | Nickel and copper |
| C. | Molybdenum and aluminium |
| D. | Molybdenum and zinc |
| Answer» C. Molybdenum and aluminium | |
| 338. |
_ Cermets are __________ materials.$? |
| A. | Refractory |
| B. | Reinforced |
| C. | Abrasive |
| D. | Fully metallic |
| Answer» B. Reinforced | |
| 339. |
_ The phenomenon in which slow extension of material takes place with the time at constant load is called$? |
| A. | Plasticity |
| B. | Creep |
| C. | Elasticity |
| D. | Ductility |
| Answer» C. Elasticity | |
| 340. |
_ Thermal shield used in high powered nuclear reactor to protect the walls of the reactor from radiation damage is made of$? |
| A. | Concrete |
| B. | Steel |
| C. | Zircalloy |
| D. | Graphite |
| Answer» C. Zircalloy | |
| 341. |
_ Which of the following is not an alloy of tin?$? |
| A. | White-bearing metal |
| B. | Pewter type metal |
| C. | Soft solder |
| D. | German silver |
| Answer» E. | |
| 342. |
_ The softest material in Mho's scale (for measuring hardness) is$? |
| A. | Talc |
| B. | Gypsum |
| C. | Rubber |
| D. | None of these |
| Answer» B. Gypsum | |
| 343. |
_ A chemical change takes place when iron$? |
| A. | Rusts |
| B. | Melts |
| C. | Is heated |
| D. | None of these |
| Answer» B. Melts | |
| 344. |
__The melleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the miximum malleability?__ |
| A. | Lead |
| B. | Copper |
| C. | Aluminium |
| D. | Wrought iron |
| Answer» B. Copper | |
| 345. |
__Locomotive boiler tubes are made of __________ alloys.__ |
| A. | Arsenic copper |
| B. | Magnesium |
| C. | Aluminium |
| D. | Nickel |
| Answer» B. Magnesium | |
| 346. |
__Wrought iron is a suitable material of construction for handling __________ solutions.__ |
| A. | Dilute acidic |
| B. | Concentrated acidic |
| C. | Alkalis & alkaline |
| D. | None of these |
| Answer» D. None of these | |
| 347. |
__Presence of high amount of silicon in cast iron__ |
| A. | Suppresses the decomposition of Fe‚ÇÉ C |
| B. | Increases the formation of graphite |
| C. | Increases the contraction of the metal |
| D. | Reduces its fluidity |
| Answer» C. Increases the contraction of the metal | |
| 348. |
__The most distinguished property of malleable cast iron is its high__ |
| A. | Ductility |
| B. | Hardness |
| C. | Malleability |
| D. | None of these |
| Answer» B. Hardness | |
| 349. |
__Percentage elongation of a material is a measure of its__ |
| A. | Ductility |
| B. | Brittleness |
| C. | Toughness |
| D. | Malleability |
| Answer» B. Brittleness | |
| 350. |
__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 | |