MCQOPTIONS
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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.
| 401. |
*/*_Which of the following equipments is used for liquid dispersion?? |
| A. | Packed column |
| B. | Venturi scrubber |
| C. | Bubble cap plate column |
| D. | Wetted wall column |
| Answer» C. Bubble cap plate column | |
| 402. |
*/*_Air-petrol ratio for maximum power generation in spark ignition engine is about? |
| A. | 6:1 |
| B. | 12 : 1 |
| C. | 18 : 1 |
| D. | 24 : 1 |
| Answer» C. 18 : 1 | |
| 403. |
*/*_Silicon in steel? |
| A. | Makes it usable in almost all magnetic circuits where alternating current is used |
| B. | Increases its electrical resistivity and decreases the hysteresis loss |
| C. | Is present upto 5% & 4% respectively when used in transformers & motor armatures |
| D. | All of the above |
| Answer» E. | |
| 404. |
*/*_Filler metal is not used in the __________ welding.? |
| A. | Seam |
| B. | Electric spot |
| C. | Projection |
| D. | All of the above |
| Answer» E. | |
| 405. |
*/*_Statistical quality control was developed by __________ , an American scientist during world war II.? |
| A. | Water shewhart |
| B. | Fredric Taylor |
| C. | John Wright |
| D. | Woolmer |
| Answer» B. Fredric Taylor | |
| 406. |
*/*_In hot working, dynamic recovery occurs in? |
| A. | Metals of low stacking fault energy |
| B. | Metals of high stacking fault energy e.g. α-iron |
| C. | Single crystal of Ni-based superalloys |
| D. | None of these |
| Answer» C. Single crystal of Ni-based superalloys | |
| 407. |
*/*_Fatigue strength of a metal is improved by? |
| A. | Overstressing |
| B. | Scratching the surface |
| C. | Raising the temperature |
| D. | Understressing |
| Answer» E. | |
| 408. |
*/*_A coal with high __________ content will ignite most easily.? |
| A. | Hydrogen |
| B. | Oxygen |
| C. | Volatile matter |
| D. | Fixed carbon |
| Answer» D. Fixed carbon | |
| 409. |
*/*_All radiations falling on a black body are? |
| A. | Refracted |
| B. | Reflected |
| C. | Transmitted |
| D. | Absorbed |
| Answer» E. | |
| 410. |
*/*_A thermally thin body is the one for which? |
| A. | Biot number is less than 0.1 |
| B. | Gallileo number is less than 0.1 |
| C. | Fourier number is less than 0.1 |
| D. | Fourier number is greater than 0.1 |
| Answer» B. Gallileo number is less than 0.1 | |
| 411. |
*/*_Out of the following, the most melleable material is? |
| A. | Copper |
| B. | Aluminium |
| C. | Wrought iron |
| D. | Lead |
| Answer» E. | |
| 412. |
*/*_The mechanism which changes the value of manipulated variable in response to the output signal from the control unit is called the? |
| A. | Final control element |
| B. | On-off control |
| C. | Floating control action |
| D. | None of these |
| Answer» B. On-off control | |
| 413. |
*/*___________ circuit is most commonly used to measure strain with the help of a strain gauge.? |
| A. | Ballast |
| B. | Voltage balancing potentiometric |
| C. | Simple current sensitive |
| D. | None of these |
| Answer» C. Simple current sensitive | |
| 414. |
*/*_Preheating before welding is done to? |
| A. | Make the plate softer |
| B. | Burn oil & grease sticking to plate surfaces |
| C. | Avoid plate distortion |
| D. | Prevent cold cracks |
| Answer» E. | |
| 415. |
*/*_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 | |
| 416. |
*/*_Duralumin is an alloy of aluminium and copper. Percentage of copper in duralumin is? |
| A. | 38 |
| B. | 26 |
| C. | 16 |
| D. | 4 |
| Answer» E. | |
| 417. |
*/*_Hardening of steel is not possible, unless it is heated __________ critical point.? |
| A. | Above the highest |
| B. | Above the lowest |
| C. | Between the first & second |
| D. | Between the second & third |
| Answer» C. Between the first & second | |
| 418. |
*/*_Surface tension of a liquid? |
| A. | Is due to intermolecular forces of cohesion |
| B. | Decreases with rise in temperature |
| C. | Is responsible for the spherical shape of an isolated liquid drop |
| D. | All of the above |
| Answer» E. | |
| 419. |
*/*_Failure of a material is attributed to __________ if it fails below its yield point.? |
| A. | Impact loading |
| B. | Fatigue |
| C. | Creep |
| D. | Straining |
| Answer» C. Creep | |
| 420. |
*/*_Which of the following is not used as a bearing material?? |
| A. | Copper-lead alloys |
| B. | Babbits |
| C. | Bronzes |
| D. | Cermets |
| Answer» E. | |
| 421. |
*/*_Brittleness induced due to the presence of sulphur in steel can be reduced by adding? |
| A. | Manganese |
| B. | Magnesium |
| C. | Vanadium |
| D. | Copper |
| Answer» B. Magnesium | |
| 422. |
*/*_The ratio of the shear stress to the principal stress on a principal plane is? |
| A. | 0 |
| B. | 1 |
| C. | 1/2 |
| D. | 1/3 |
| Answer» B. 1 | |
| 423. |
*/*_Water hammer in pipelines results, when the flowing fluid? |
| A. | Has very high velocity |
| B. | Has very high pressure |
| C. | Is brought to rest by gradually closing a valve |
| D. | Is suddenly brought to rest by closing a valve |
| Answer» E. | |
| 424. |
*/*_Moist air is cooled along the line of constant __________ , when it is passed over a cold & dry cooling coil, such that no condensation occurs?? |
| A. | Enthalpy |
| B. | Relative humidity |
| C. | Wet bulb temperature |
| D. | Dew point temperature |
| Answer» E. | |
| 425. |
*/*_Materials having resistivity ranging from 1 to 100 ohm. cm is termed as? |
| A. | Conductor |
| B. | Insulator |
| C. | Semi-conductor |
| D. | None of these |
| Answer» D. None of these | |
| 426. |
*/*_The stress at which a metal fails by fatigue lies? |
| A. | Near the fracture point of the stress-strain curve |
| B. | In the plastic range |
| C. | In the elastic range |
| D. | None of these |
| Answer» D. None of these | |
| 427. |
*/*_Castability of aluminium is increased by the addition of __________ in it.? |
| A. | Silicon |
| B. | Manganese |
| C. | Bismuth |
| D. | Lead |
| Answer» B. Manganese | |
| 428. |
*/*_Atomic __________ of an element is a whole number.? |
| A. | Weight |
| B. | Number |
| C. | Volume |
| D. | Radius |
| Answer» C. Volume | |
| 429. |
*/*_Gantt charts are used for streamlining the? |
| A. | Inventory control |
| B. | Production schedule |
| C. | Sales forecasting |
| D. | Quality control |
| Answer» C. Sales forecasting | |
| 430. |
*/*___________ test can be termed as the semi-distructive test.? |
| A. | Impact |
| B. | Torsion |
| C. | Hardness |
| D. | Charpy |
| Answer» D. Charpy | |
| 431. |
*/*_Lead is poured into the joints between two __________ pipes.? |
| A. | Cast iron |
| B. | Steel |
| C. | Concrete |
| D. | Plastic |
| Answer» B. Steel | |
| 432. |
*/*_Milligram of KOH required to saponify 1 gm of oil is called its __________ number.? |
| A. | Saponification |
| B. | Acid |
| C. | Precipitation |
| D. | Emulsion |
| Answer» B. Acid | |
| 433. |
*/*_An abrupt and sudden fall in the readinp of barometer is an indication of the? |
| A. | Storm |
| B. | Rain |
| C. | Clear weather |
| D. | Cold wave |
| Answer» B. Rain | |
| 434. |
*/*_Electrometallurgy is not involved in the extraction of __________ from its ore.? |
| A. | Aluminium |
| B. | Tin |
| C. | Lead |
| D. | Both B & C |
| Answer» E. | |
| 435. |
*/*_In the diving apparatus, helium is used along with oxygen, because it is? |
| A. | Easily available |
| B. | Not soluble in blood at high pressure |
| C. | Lighter than nitrogen |
| D. | Completely miscible with oxygen |
| Answer» C. Lighter than nitrogen | |
| 436. |
*/*_Absorptivity of a grey body varies with the? |
| A. | Wavelength of the incident ray |
| B. | Temperature |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» E. | |
| 437. |
*/*_In the formation of cermets, the ratio of ceramic material to metallic material is usually 80:20. Which of the following is a cermet?? |
| A. | Zirconia |
| B. | Alumina |
| C. | Bakelite |
| D. | Tungsten carbide |
| Answer» E. | |
| 438. |
*/*_Induced draft fans provided in large thermal power plant boilers have __________ blades.? |
| A. | Forward curved |
| B. | Backward curved |
| C. | Double curved |
| D. | Radial or straight |
| Answer» C. Double curved | |
| 439. |
*/*_Which of the following is not an explosive?? |
| A. | TNT |
| B. | CMC |
| C. | RDX |
| D. | Lead azide |
| Answer» C. RDX | |
| 440. |
*/*_In the floatation process, pine oil is used as the? |
| A. | Collector |
| B. | Activator |
| C. | Frother |
| D. | Depressant |
| Answer» D. Depressant | |
| 441. |
*/*_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 | |
| 442. |
*/*_Machine tool bodies are usually made of? |
| A. | Cast iron |
| B. | Mild steel |
| C. | Wrought iron |
| D. | Copper alloys |
| Answer» B. Mild steel | |
| 443. |
*/*___________ wire is never used for making the heating element.? |
| A. | Nichrome |
| B. | Kanthal |
| C. | Invar |
| D. | None of these |
| Answer» D. None of these | |
| 444. |
*/*_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 | |
| 445. |
%_Water hammer in pipelines results, when the flowing fluid_% |
| A. | Has very high velocity |
| B. | Has very high pressure |
| C. | Is brought to rest by gradually closing a valve |
| D. | Is suddenly brought to rest by closing a valve |
| Answer» E. | |
| 446. |
%_In order to protect the aquatic creatures, the dissolved oxygen content in fresh water stream should never be less than __________ PPm._% |
| A. | 0.5 |
| B. | 1 |
| C. | 5 |
| D. | 20 |
| Answer» D. 20 | |
| 447. |
%_L.D. (Linz-Donawitz) converter is used in the production of_% |
| A. | Copper |
| B. | Steel |
| C. | Zinc |
| D. | Aluminium |
| Answer» C. Zinc | |
| 448. |
%_Hoope's cell is predominantly used for the electrolytic refining of_% |
| A. | Zinc |
| B. | Copper |
| C. | Aluminium |
| D. | Tin |
| Answer» D. Tin | |
| 449. |
%_Out of the following, the alloy which has equal percentage of constituents, is_% |
| A. | White metal |
| B. | Gun metal |
| C. | Duralumin |
| D. | Constanton |
| Answer» E. | |
| 450. |
%_Pig iron is a product of_% |
| A. | Electric arc furnace |
| B. | Cupola |
| C. | Blast furnace |
| D. | Open hearth furnace |
| Answer» D. Open hearth furnace | |