MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 1175 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 501. |
%_A pycnometer is used for the measurement of_% |
| A. | Flow rate of molten metal |
| B. | Specific gravity of a liquid |
| C. | Composition of alloys |
| D. | Concentration of a solution |
| Answer» C. Composition of alloys | |
| 502. |
%_Which of the following is the most elastic material?_% |
| A. | Plastic |
| B. | Glass |
| C. | Steel |
| D. | Rubber |
| Answer» D. Rubber | |
| 503. |
%_Which of the following is not a cupro-nick-el alloy?_% |
| A. | German silver |
| B. | Monel metal |
| C. | Muntz metal |
| D. | None of these |
| Answer» D. None of these | |
| 504. |
%_An engineer's hammer is made of high __________ steel._% |
| A. | Carbon |
| B. | Speed |
| C. | Silicon |
| D. | Chromium |
| Answer» B. Speed | |
| 505. |
%_Which of the following is not a principal alloying element for the structural steel?_% |
| A. | Molybednum |
| B. | Nickel |
| C. | Manganese |
| D. | Chromium |
| Answer» B. Nickel | |
| 506. |
%_Young's modulus of a material is the measure of its_% |
| A. | Stiffness |
| B. | Malleability |
| C. | Creep resistance |
| D. | Tensile strength |
| Answer» B. Malleability | |
| 507. |
%_Out of the following surfaces, the emis-sivity will be minimum for_% |
| A. | Aluminium foil |
| B. | Concrete |
| C. | Plaster |
| D. | Smooth glass |
| Answer» C. Plaster | |
| 508. |
%_Temperature attained in soldering of metals is about __________ °C._% |
| A. | 150-300 |
| B. | 400-500 |
| C. | 650-800 |
| D. | 1000-1100 |
| Answer» B. 400-500 | |
| 509. |
%_The refractory lining of the bottom in a basic electric arc furnace is made of_% |
| A. | Silica |
| B. | Alumina |
| C. | Magnesia |
| D. | Fireclay |
| Answer» D. Fireclay | |
| 510. |
%_Minimum number of members required to form a Public Limited Joint Stock Company is_% |
| A. | 7 |
| B. | 10 |
| C. | 12 |
| D. | 17 |
| Answer» B. 10 | |
| 511. |
%_Hardness & tensile strength of austenitic stainless steel can be increased by_% |
| A. | Martempering |
| B. | Cold working |
| C. | Normalising |
| D. | Hardening |
| Answer» C. Normalising | |
| 512. |
%___________ is used for tying the steel coloumns to concrete foundation._% |
| A. | Grouting |
| B. | Eyebolt |
| C. | Anchor bolts |
| D. | Refractory castables |
| Answer» D. Refractory castables | |
| 513. |
%_Sewage is not an excellent medium for the growth of_% |
| A. | Aquatic creatures |
| B. | Protozoa |
| C. | Virus |
| D. | Pathogenic bacteria |
| Answer» B. Protozoa | |
| 514. |
%_In case of compression of one kg of air, the work done will be the least, when the value of polytropic index 'n' is_% |
| A. | 1 |
| B. | 1.4 |
| C. | 1.5 |
| D. | Y = Cp/Cv |
| Answer» B. 1.4 | |
| 515. |
%_Which of the following materials has the least scrap value?_% |
| A. | Aluminium |
| B. | Stainless steel |
| C. | Brass |
| D. | Copper |
| Answer» C. Brass | |
| 516. |
%_What is the percentage of chromium in 18-4-1 high speed steel?_% |
| A. | 1 |
| B. | 4 |
| C. | 18 |
| D. | 23 |
| Answer» D. 23 | |
| 517. |
%_Cassiterite is an ore of_% |
| A. | Tin |
| B. | Lead |
| C. | Molybdenum |
| D. | Chromium |
| Answer» B. Lead | |
| 518. |
%_The product out from a cupola is called_% |
| A. | Wrought iron |
| B. | Pig iron |
| C. | Cast iron |
| D. | None of these |
| Answer» D. None of these | |
| 519. |
%___________ is not used as a material of construction in thermocouples._% |
| A. | Alumel |
| B. | Rhodium |
| C. | Constantan |
| D. | Duralumin |
| Answer» E. | |
| 520. |
%_The leg of a barometric leg pump is longer than the Toricellian leg, which is about __________ metres._% |
| A. | 1 |
| B. | 5 |
| C. | 34 |
| D. | 10 |
| Answer» E. | |
| 521. |
%_Compressed dry air is used as the cutting fluid, while machining_% |
| A. | Steel |
| B. | Cast iron |
| C. | Aluminium |
| D. | None of these |
| Answer» C. Aluminium | |
| 522. |
%_Bad odour in sanitary latrines is reduced by periodically sprinkling_% |
| A. | Bleaching powder |
| B. | Lime powder |
| C. | Aluminium sulphate |
| D. | None of these |
| Answer» C. Aluminium sulphate | |
| 523. |
%_A reduction process is accompanied with increase in the_% |
| A. | Number of electrons |
| B. | Oxidation number |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» B. Oxidation number | |
| 524. |
%_Gratings is associated with the measurement of_% |
| A. | Linear displacement |
| B. | Concavity/convexity |
| C. | Surface texture |
| D. | Flatness |
| Answer» B. Concavity/convexity | |
| 525. |
%_Brazing is the joining of metals_% |
| A. | Without melting the base metal |
| B. | With a non-ferrous filler |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 526. |
%___________ are normally subjected to sub-zero treatment._% |
| A. | Highly stressed parts |
| B. | Gauges or precision parts |
| C. | Cold rolled sheets |
| D. | Non machinable materials |
| Answer» C. Cold rolled sheets | |
| 527. |
%_The temperature at which a gas, when subjected to Joule-Thomson expansion, neither cools or heats up, is termed as the __________ temperature. Above this temperature the gas heats up on throttling and below this the gas cools down._% |
| A. | Isotactic |
| B. | Saturation |
| C. | Inversion |
| D. | Throttling |
| Answer» D. Throttling | |
| 528. |
%_What is the range of tempering temperature (°C) for most of the materials ?_% |
| A. | 75-100 |
| B. | 200-300 |
| C. | 350-450 |
| D. | 500-600 |
| Answer» C. 350-450 | |
| 529. |
%_Damage to metal surface by mechanical action is called_% |
| A. | Pitting |
| B. | Corrosion |
| C. | Erosion |
| D. | None of these |
| Answer» D. None of these | |
| 530. |
_ Heat transfer by radiation from a hot body will be most rapid, if its surface is __________ because of its higher emissivity.$? |
| A. | White & rough |
| B. | Black & rough |
| C. | White & polished |
| D. | Black & polished |
| Answer» C. White & polished | |
| 531. |
_ Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________ method.$? |
| A. | Diminishing balance |
| B. | Sinking fund |
| C. | Multiple straight line |
| D. | Sum of the years digit |
| Answer» B. Sinking fund | |
| 532. |
_ __________ can not increase the fatigue strength of a material.$? |
| A. | Grain refining |
| B. | Grain coarsening |
| C. | Surface hardening |
| D. | Shot peening |
| Answer» C. Surface hardening | |
| 533. |
_ Which of the following is the terminology used for the temperature at which the phase changes occur in a metal ?$? |
| A. | Critical temperature |
| B. | Recrystallisation temperature |
| C. | Phase transformation temperature |
| D. | Transition temperature |
| Answer» B. Recrystallisation temperature | |
| 534. |
_ In connection with corrosion of metals, passivation is the process that$? |
| A. | Intensifies deterioration |
| B. | Changes the composition of the metal |
| C. | Inhibits further deterioration |
| D. | None of these |
| Answer» D. None of these | |
| 535. |
_ Coating provided on the electrodes used in the arc welding is not expected to$? |
| A. | Add alloying elements |
| B. | Prevent electrode from contamination |
| C. | Stabilise the arc |
| D. | Provide protective atmosphere to weld |
| Answer» C. Stabilise the arc | |
| 536. |
_ __________ joint is mostly used for joining pipes carrying water at low pressure.$? |
| A. | Nipple |
| B. | Socket |
| C. | Union |
| D. | Bell and spigot |
| Answer» C. Union | |
| 537. |
_ Heating of ferromagnetic materials to a temperature above Curie temperature makes it$? |
| A. | Insulator for heat & electricity transmission |
| B. | Ferritic |
| C. | Behave like paramagnetic materials |
| D. | Superconductor |
| Answer» D. Superconductor | |
| 538. |
_ Which of the following alloying elements when added in steel does not improve its lachinability?$? |
| A. | Sulphur |
| B. | Phosphorous |
| C. | Copper |
| D. | Lead |
| Answer» D. Lead | |
| 539. |
_ __________ wire is never used for making the heating element.$? |
| A. | Nichrome |
| B. | Kanthal |
| C. | Invar |
| D. | None of these |
| Answer» D. None of these | |
| 540. |
_ Machine tool bodies are usually made of$? |
| A. | Cast iron |
| B. | Mild steel |
| C. | Wrought iron |
| D. | Copper alloys |
| Answer» B. Mild steel | |
| 541. |
_ At room temperature, F.C.C. crystal structure is observed in$? |
| A. | Lead |
| B. | Cupro-nickel |
| C. | Titanium |
| D. | Tungsten |
| Answer» B. Cupro-nickel | |
| 542. |
_ The most detrimental impurity in high pressure boiler feed water is$? |
| A. | Suspended salt |
| B. | Dissolved salt |
| C. | Silica |
| D. | Turbidity |
| Answer» D. Turbidity | |
| 543. |
_ What is the effect on the performance of the economiser in the thermal power plant boiler, if the feed water temperature is very low due to preheaters being out for repairs or starving of steam supply ?$? |
| A. | It results in corrosion due to the condensation on the flue gas side of the economiser tubes due to handling of low temperature water |
| B. | Economiser tube life increases due to handling of low temperature water |
| C. | Heat transfer efficiency of economiser increases due to picking up high heat from the flue gases |
| D. | Scale formation rate on economiser tubes increases |
| Answer» B. Economiser tube life increases due to handling of low temperature water | |
| 544. |
_ The property of material, by which a given amount of energy is absorbed by it, without plastic deformation is called$? |
| A. | Resilience |
| B. | Toughness |
| C. | Ductility |
| D. | Impact strength |
| Answer» B. Toughness | |
| 545. |
_ Pick the odd man out of the following.$? |
| A. | Calorising |
| B. | Pack carburising |
| C. | Nitriding |
| D. | Cyaniding |
| Answer» B. Pack carburising | |
| 546. |
_ Pipelines carrying various utilities in chemical industries are identified by their colour codes. The color of pipeline carrying steam is$? |
| A. | Black |
| B. | Silver grey |
| C. | Green |
| D. | Yellow |
| Answer» C. Green | |
| 547. |
_ To improve the machinability of steel by its softening, it is subjected to$? |
| A. | Cold working |
| B. | Annealing |
| C. | Shot blasting |
| D. | Heating |
| Answer» D. Heating | |
| 548. |
_ Rain drops falling through atmospheric air attain limited terminal velocity, because of$? |
| A. | Upward thrust due to air |
| B. | Viscous force exerted by air |
| C. | Surface tension effects of water |
| D. | Force of gravity |
| Answer» C. Surface tension effects of water | |
| 549. |
_ The ratio of thermal & electrical conductivity is same for all the metals at the same temperature ; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K)$? |
| A. | T |
| B. | 1/T |
| C. | T² |
| D. | 1/T² |
| Answer» B. 1/T | |
| 550. |
_ The main function of the deaerator used in the thermal power plant is to$? |
| A. | Throttle down the steam pressure |
| B. | Enhance feed water temperature |
| C. | Remove dissolved gases from feed-water |
| D. | Remove non-condensable gases from condenser |
| Answer» D. Remove non-condensable gases from condenser | |