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.
| 401. |
_Centrifugal pump made of pyrex or glass can't be used to pump$? |
| A. | Milk and fruit juices |
| B. | Alkaline solutions |
| C. | Dilute H‚ÇÇSO‚ÇÑ at room temperature |
| D. | Brine |
| Answer» C. Dilute H‚Äö√á√áSO‚Äö√á√ë at room temperature | |
| 402. |
_Atmospheric corrosion of metals result from their$? |
| A. | Slow oxidation |
| B. | Fast oxidation |
| C. | Fast hydration |
| D. | Slow dehydration |
| Answer» B. Fast oxidation | |
| 403. |
_Most of the common metals have __________ crystal structure.$? |
| A. | Cubic |
| B. | Hexagonal |
| C. | Orthorhombic |
| D. | None of these |
| Answer» B. Hexagonal | |
| 404. |
_Which of the following is not an alloy of copper?$? |
| A. | Muntz metal |
| B. | Admirability gun metal |
| C. | German silver |
| D. | Pewter metal |
| Answer» E. | |
| 405. |
_Which of the following heat treatment processes is used for softening the hardened material?$? |
| A. | Normalising |
| B. | Tempering |
| C. | Annealing |
| D. | None of these |
| Answer» C. Annealing | |
| 406. |
_Carbon content in steel is __________ percent.$? |
| A. | 0.1-2 |
| B. | 4-6 |
| C. | 2-4 |
| D. | 0.001-0.01 |
| Answer» B. 4-6 | |
| 407. |
_Addition of tungsten to steel imparts$? |
| A. | Magnetic properties |
| B. | Cutting hardness |
| C. | Corrosion resistance |
| D. | Ductility |
| Answer» C. Corrosion resistance | |
| 408. |
_Which of the following exercises most powerful influence on the mechanical properties of steel?$? |
| A. | Manganese |
| B. | Carbon |
| C. | Phosphorous |
| D. | Silicon |
| Answer» C. Phosphorous | |
| 409. |
_The 'bomb' in the bomb calorimeter is made of$? |
| A. | Molybdenum stainless steel |
| B. | Mild steel |
| C. | High silicon iron (14% Si) |
| D. | Copper |
| Answer» B. Mild steel | |
| 410. |
_Which of the following is a non-magnetic material?$? |
| A. | Cobalt |
| B. | Zinc |
| C. | Nickel |
| D. | None of these |
| Answer» C. Nickel | |
| 411. |
_Aluminium storage vessel can be used to store$? |
| A. | Aqua regia |
| B. | Ferrous sulphate |
| C. | Hydrochloric acid (10%) |
| D. | None of these |
| Answer» E. | |
| 412. |
_Photographic plates are coated with$? |
| A. | Silver nitrate |
| B. | Silver halide |
| C. | Calcium silicate |
| D. | Metallic silver |
| Answer» C. Calcium silicate | |
| 413. |
_Gun metal is an alloy of$? |
| A. | Nickel, tin and copper |
| B. | Copper, tin and zinc |
| C. | Copper, phosphorus and nickel |
| D. | Manganese, phosphorus and nickel |
| Answer» C. Copper, phosphorus and nickel | |
| 414. |
_Most suitable material of construction for the storage of concentrated nitric acid is$? |
| A. | Cast iron |
| B. | Monel |
| C. | Karbate |
| D. | Aluminium or chromium alloys (Cr > 18% for cold acid) |
| Answer» E. | |
| 415. |
_The crystal structure of most of the common metals is$? |
| A. | Orthorhombic |
| B. | Cubic |
| C. | Hexagonal |
| D. | None of these |
| Answer» C. Hexagonal | |
| 416. |
_When iron is rusted, it is$? |
| A. | Converted to a fine powder |
| B. | Reduced |
| C. | Oxidised |
| D. | None of these |
| Answer» D. None of these | |
| 417. |
_Generally __________ are subjected to galvanising (i.e., zinc coating).$? |
| A. | Non-ferrous metals |
| B. | Non-metals |
| C. | Low carbon steels |
| D. | Stainless steel |
| Answer» D. Stainless steel | |
| 418. |
_Aqueous nitric acid is stored in$? |
| A. | Steel drum |
| B. | Stainless steel vessel |
| C. | Cast iron vessel lined with acid-proof masonry brick |
| D. | Cast iron vessel |
| Answer» C. Cast iron vessel lined with acid-proof masonry brick | |
| 419. |
_Dielectric strength of a material is$? |
| A. | Its energy stroage capacity |
| B. | A magnetic property |
| C. | Its capacity to resist the flow of current |
| D. | Its capacity to withstand high voltage |
| Answer» E. | |
| 420. |
_Ferric stainless steels compared to austenitic stainless steels$? |
| A. | Have lower corrosion resistance |
| B. | Are harder to fabricate |
| C. | Are less ductile and hence less suitable for cold pressing |
| D. | All of the above |
| Answer» E. | |
| 421. |
_Shock resisting steels should possess high$? |
| A. | Hardness |
| B. | Toughness |
| C. | Tensile strength |
| D. | Wear resistance |
| Answer» C. Tensile strength | |
| 422. |
_Non-ferrous metals and hard steels do not exhibit a definite yield point, when pulled in the testing machine and hence for these cases, a better measure of their elastic properties is defined by the __________ stress.$? |
| A. | Ultimate |
| B. | Yield point |
| C. | Proof |
| D. | None of these |
| Answer» D. None of these | |
| 423. |
_Soap kettle used in the production of laundry soap is made of$? |
| A. | Steel with top section nickel clad or stainless steel |
| B. | Cast iron |
| C. | Nickel |
| D. | Concrete |
| Answer» B. Cast iron | |
| 424. |
_Plate and frame filter press is usually made of$? |
| A. | Mild steel |
| B. | Cast iron |
| C. | Stainless steel |
| D. | Galvanised iron |
| Answer» C. Stainless steel | |
| 425. |
_Which of the following has the highest compressive strength?$? |
| A. | Wrought iron |
| B. | Cast iron |
| C. | Mild steel |
| D. | High carbon steel |
| Answer» E. | |
| 426. |
Ball bearings are generally made of$? |
| A. | Plain carbon steel |
| B. | Chrome carbon steel |
| C. | Stainless steel |
| D. | Malleable cast iron |
| Answer» C. Stainless steel | |
| 427. |
Babbit metal is not a$? |
| A. | Tin base alloy |
| B. | White metal |
| C. | Lead base alloy |
| D. | Pure metal |
| Answer» E. | |
| 428. |
Dead mild steel, which contains 0.10 to 0.15 percent carbon is used for making$? |
| A. | Shafts |
| B. | Flanges |
| C. | Gears |
| D. | Shear blades |
| Answer» C. Gears | |
| 429. |
Cast iron is$? |
| A. | Used for making shock resisting parts |
| B. | Manufactured in cupola and is brittle |
| C. | Having compressive strength more than its tensile strength |
| D. | All of the above |
| Answer» E. | |
| 430. |
A material is called 'ductile', if it can be$? |
| A. | Drawn into wires |
| B. | Hammered to a thin sheet |
| C. | Fractured without deformation |
| D. | Made lustrous by heating it |
| Answer» B. Hammered to a thin sheet | |
| 431. |
Muntz metal is a/an alloys of$? |
| A. | Magnesium & tin |
| B. | Ferrous material |
| C. | Lead & tin |
| D. | Copper & zinc |
| Answer» E. | |
| 432. |
Monel alloy is$? |
| 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 | |
| 433. |
Combination of metals and ceramics are called$? |
| A. | Metalloy |
| B. | Cermets |
| C. | Pellets |
| D. | Non-crystalline ceramics |
| Answer» C. Pellets | |
| 434. |
Which of the following contains maximum percentage of carbon?$? |
| A. | Boiler plate steel |
| B. | Rail steel |
| C. | Saws for cutting steel |
| D. | Railway spring steel |
| Answer» D. Railway spring steel | |
| 435. |
Polymorphism is not exhibited by$? |
| A. | Carbon |
| B. | Iron |
| C. | Phosphorous |
| D. | None of these |
| Answer» E. | |
| 436. |
Hydrochloric acid absorber in made of$? |
| A. | Cast iron |
| B. | Mild steel |
| C. | Karbate |
| D. | Stainless steel |
| Answer» D. Stainless steel | |
| 437. |
Hot working of lead is carried out at$? |
| A. | 75° C |
| B. | 373° K |
| C. | 150° C |
| D. | Room temperature |
| Answer» E. | |
| 438. |
In cold working of metal as compared to its hot working$? |
| A. | Cracks and blow holes are eliminated |
| B. | Ductility and impact strength improves |
| C. | Appreciable strain hardening is produced |
| D. | Yield stress, hardness and fatigue strength is not at all affected |
| Answer» D. Yield stress, hardness and fatigue strength is not at all affected | |
| 439. |
With increase in carbide/graphite ratio in cast iron, its$? |
| A. | Hardness & brittleness increases |
| B. | Ductility decreases |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 440. |
Valves in pipe size of 2" and under are normally made of$? |
| A. | Wrought iron |
| B. | Brass |
| C. | Bronze |
| D. | Monel |
| Answer» C. Bronze | |
| 441. |
Clock pendulums are usually made of __________ steel.$? |
| A. | High speed |
| B. | Stainless |
| C. | Heat resisting |
| D. | None of these |
| Answer» E. | |
| 442. |
Invar contains the highest percentage of$? |
| A. | Vanadium |
| B. | Iron |
| C. | Tungsten |
| D. | Cobalt |
| Answer» C. Tungsten | |
| 443. |
How many molecules per unit cell are there in a face centred cubic lettice?$? |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» C. 6 | |
| 444. |
High speed cutting tool steels contain about __________ percent of tungsten.$? |
| A. | 6-8 |
| B. | 18-20 |
| C. | 30-35 |
| D. | 50-55 |
| Answer» C. 30-35 | |
| 445. |
The high expansion metal normally used in the bimetallic thermometer is __________ temperature measurement.$? |
| A. | Brass for low |
| B. | Nickel alloys for high |
| C. | Both A & B |
| D. | Aluminium for all |
| Answer» D. Aluminium for all | |
| 446. |
Hardest materials so far found is$? |
| A. | Diamond |
| B. | Graphite |
| C. | Carborundum |
| D. | Pumice stone |
| Answer» B. Graphite | |
| 447. |
The loss of strength in compression which occurs, when there is a gain of strength in tension due to over loading is called$? |
| A. | Bauschinger effect |
| B. | Hooke's effect |
| C. | Hysterisis |
| D. | Relaxation |
| Answer» B. Hooke's effect | |
| 448. |
Wood metal is not used for making$? |
| 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 | |
| 449. |
Plasticisers are added to polymers to improve their$? |
| A. | Tensile strength |
| B. | Softness & flexibility |
| C. | Acid resistance |
| D. | Alkali resistance |
| Answer» C. Acid resistance | |
| 450. |
Polythene (low or high density) containers are not corroded by$? |
| A. | Sulphuric acid (10%) at room temperature |
| B. | Nitric acid (95%) at room temperature |
| C. | Sulphur trioxide at 60°C |
| D. | Any of these |
| Answer» B. Nitric acid (95%) at room temperature | |