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.
| 601. |
_ Absorptivity of a grey body varies with the$? |
| A. | Wavelength of the incident ray |
| B. | Temperature |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» E. | |
| 602. |
_ Stellite is a trade name for the$? |
| A. | Cermets |
| B. | Ferrous cast alloys |
| C. | Non-ferrous cast alloys |
| D. | Products made by powder metallurgy techniques |
| Answer» D. Products made by powder metallurgy techniques | |
| 603. |
_ 'GASOHOL' widely used in Brazil as a motor fuel is a mixture of alcohol and$? |
| A. | Petrol |
| B. | LPG |
| C. | Light hydrocarbon gases (e.g. butane or propane) |
| D. | None of these |
| Answer» B. LPG | |
| 604. |
_ The heat of neutralisation remains constant, when there is a reaction between dilute solutions of strong$? |
| A. | Base and strong acid |
| B. | Base and weak acid |
| C. | Acid and weak base |
| D. | None of these |
| Answer» B. Base and weak acid | |
| 605. |
_ Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)$? |
| A. | 1/k |
| B. | k |
| C. | k² |
| D. | 1/k² |
| Answer» C. k¬¨‚⧠| |
| 606. |
_ The most suitable material for a sewer for carrying storm water is$? |
| A. | Asbestos cement |
| B. | Cast iron |
| C. | Mild steel |
| D. | Cement concrete |
| Answer» E. | |
| 607. |
_ Specific gravity of a metal, which weighs 5 kg in air and 4 kg when submerged in water, will be$? |
| A. | 5 |
| B. | 1.25 |
| C. | 2.5 |
| D. | 3.75 |
| Answer» B. 1.25 | |
| 608. |
_ Lead percentage in pure galena is about$? |
| A. | 8.6 |
| B. | 86.6 |
| C. | 35.8 |
| D. | 61.4 |
| Answer» B. 86.6 | |
| 609. |
_ Which of the following is termed as the boiler mounting ?$? |
| A. | Feed water pump |
| B. | Steam superheater |
| C. | Blow off cock |
| D. | Economiser |
| Answer» D. Economiser | |
| 610. |
_ Milligram of KOH required to saponify 1 gm of oil is called its __________ number.$? |
| A. | Saponification |
| B. | Acid |
| C. | Precipitation |
| D. | Emulsion |
| Answer» B. Acid | |
| 611. |
_ Gantt charts are used for streamlining the$? |
| A. | Inventory control |
| B. | Production schedule |
| C. | Sales forecasting |
| D. | Quality control |
| Answer» C. Sales forecasting | |
| 612. |
_ Atomic __________ of an element is a whole number.$? |
| A. | Weight |
| B. | Number |
| C. | Volume |
| D. | Radius |
| Answer» C. Volume | |
| 613. |
_ Lead is poured into the joints between two __________ pipes.$? |
| A. | Cast iron |
| B. | Steel |
| C. | Concrete |
| D. | Plastic |
| Answer» B. Steel | |
| 614. |
_ __________ test can be termed as the semi-distructive test.$? |
| A. | Impact |
| B. | Torsion |
| C. | Hardness |
| D. | Charpy |
| Answer» D. Charpy | |
| 615. |
_ Materials having resistivity ranging from 1 to 100 ohm. cm is termed as$? |
| A. | Conductor |
| B. | Insulator |
| C. | Semi-conductor |
| D. | None of these |
| Answer» D. None of these | |
| 616. |
_ Powder metallurgy process does not make metal powder by$? |
| A. | Atomisation |
| B. | Grinding/milling |
| C. | Hammering |
| D. | Electrolytic deposition |
| Answer» D. Electrolytic deposition | |
| 617. |
_ Routing in production, planning & control is concerned with the$? |
| A. | Sequence of operation to be performed |
| B. | Progress of work performed |
| C. | Authorisation of work to be performed |
| D. | Balancing of load on machines |
| Answer» B. Progress of work performed | |
| 618. |
_ Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of portland cement. The component of Portland cement which first hardens is$? |
| A. | 5CaO . 3 Al2O‚ÇÉ |
| B. | 3CaO . Al2O‚ÇÉ |
| C. | 3CaO . SiO‚ÇÇ |
| D. | 2CaO . SiO‚ÇÇ |
| Answer» B. 3CaO . Al2O‚Äö√á√â | |
| 619. |
_ Which of the following is a unit of time ?$? |
| A. | Barn |
| B. | Light year |
| C. | Angstrom |
| D. | None of these |
| Answer» E. | |
| 620. |
_ Castability of aluminium is increased by the addition of __________ in it.$? |
| A. | Silicon |
| B. | Manganese |
| C. | Bismuth |
| D. | Lead |
| Answer» B. Manganese | |
| 621. |
_ The stress at which a metal fails by fatigue lies$? |
| A. | Near the fracture point of the stress-strain curve |
| B. | In the plastic range |
| C. | In the elastic range |
| D. | None of these |
| Answer» D. None of these | |
| 622. |
_ Oxygen cylinders used for autogenous (cutting/welding) purposes are$? |
| A. | Seamless & made of steel |
| B. | Heat treated before use |
| C. | Made by sand casting |
| D. | Welded steel cylinders |
| Answer» B. Heat treated before use | |
| 623. |
_ The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is$? |
| A. | Full annealing |
| B. | Bright annealing |
| C. | Patenting |
| D. | None of these |
| Answer» D. None of these | |
| 624. |
_ Scaling occurs in boiler tubes due to the fact that, the solubility of Ca(OH)‚ÇÇ __________ with increasing temperature.$? |
| A. | Increases |
| B. | Decreases |
| C. | Shows inversion of solubility |
| D. | None of these |
| Answer» B. Decreases | |
| 625. |
_ Carnot cycle is also termed as the constant __________ cycle in thermodynamics.$? |
| A. | Entropy |
| B. | Pressure |
| C. | Volume |
| D. | Heat |
| Answer» E. | |
| 626. |
_ Measurement of the area of the indented surface is not involved in the __________ hardhes testing method.$? |
| A. | Vicker's |
| B. | Rockwell |
| C. | Knoop |
| D. | Brinell |
| Answer» C. Knoop | |
| 627. |
_ Which of the following is the most effective inhibitor of grain growth, when added in small quantity in steel ?$? |
| A. | Manganese |
| B. | Vanadium |
| C. | Cobalt |
| D. | Copper |
| Answer» C. Cobalt | |
| 628. |
_ Pressure exerted by a liquid depends upon its$? |
| A. | Surface tension |
| B. | Density |
| C. | Viscosity |
| D. | Buoyancy |
| Answer» C. Viscosity | |
| 629. |
_ Hard magnetic materials have high$? |
| A. | Coercive force |
| B. | Residual magnetic induction |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 630. |
_ Ester is formed, when an alcohol reacts with$? |
| A. | Carboxylic acid |
| B. | Aldehyde |
| C. | Ketone |
| D. | Ether |
| Answer» B. Aldehyde | |
| 631. |
_ Photographic plates are coated with$? |
| A. | Silver nitrate |
| B. | Silver halide |
| C. | Calcium silicate |
| D. | Metallic silver |
| Answer» C. Calcium silicate | |
| 632. |
_ Ammonia leakage in the refrigeration system is detected by$? |
| A. | Sulphur stick, which on detection gives white smoke |
| B. | Using chemical reagents |
| C. | Its smell |
| D. | Soap solution |
| Answer» B. Using chemical reagents | |
| 633. |
_ Age hardening is connected with$? |
| A. | Babbit metal |
| B. | Gun metal |
| C. | Stainless steel |
| D. | Duralumin |
| Answer» E. | |
| 634. |
_ Dialysis is the process of separating substances in the$? |
| A. | Colloidal state from those present in the true solutions |
| B. | Colloidal state from those present in the suspensions |
| C. | Suspension from those present in the solutions |
| D. | None of these |
| Answer» B. Colloidal state from those present in the suspensions | |
| 635. |
_ Specific gravity of hot metal (pig iron) is __________ times that of the blast furnace slag.$? |
| A. | 2 |
| B. | 3 |
| C. | 0.8 |
| D. | 6 |
| Answer» C. 0.8 | |
| 636. |
_ Safety matches is produced using$? |
| A. | Red phosphorus |
| B. | Yellow phosphorus |
| C. | Black phosphorus |
| D. | Elemental sulphur |
| Answer» B. Yellow phosphorus | |
| 637. |
_ Styrofoam is the commercial name of$? |
| A. | Polyurathene |
| B. | Polystyrene |
| C. | Polyacrylonitrile |
| D. | Polybutadiene |
| Answer» C. Polyacrylonitrile | |
| 638. |
_ The refractory brick which has good thermal shock resistance at high temperature but cracks on cooling below 400°C is$? |
| A. | Magnesite |
| B. | Chrome |
| C. | Silica |
| D. | Fireclay |
| Answer» D. Fireclay | |
| 639. |
_ Percentage of differential pressure lost in a venturimeter with a tapering of 15° may be about$? |
| A. | 1 |
| B. | 10 |
| C. | 25 |
| D. | 50 |
| Answer» C. 25 | |
| 640. |
_ M10 index of coke indicates its$? |
| A. | Compressive strength |
| B. | Hardness |
| C. | Abrasion resistance |
| D. | Impact strength |
| Answer» D. Impact strength | |
| 641. |
_ To counteract the bad effects of strain hardening on a cold formed part, it must be$? |
| A. | Tempered |
| B. | Normalised |
| C. | Annealed |
| D. | Hardened |
| Answer» D. Hardened | |
| 642. |
_ The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature of air.$? |
| A. | Ambient |
| B. | Dry bulb |
| C. | Dew point |
| D. | Wet bulb |
| Answer» D. Wet bulb | |
| 643. |
_ __________ can not be forged.$? |
| A. | High speed/carbon steel |
| B. | Cast iron |
| C. | Wrought iron |
| D. | Mild steel |
| Answer» C. Wrought iron | |
| 644. |
_ On being hit with a hammer, __________ will readily fracture.$? |
| A. | Brass |
| B. | Mild steel |
| C. | Cast iron |
| D. | Lead |
| Answer» D. Lead | |
| 645. |
_ The most commonly used material for sewers for carrying sewage in the normal situation is$? |
| A. | Asbestos cement |
| B. | Stainiess steel |
| C. | Stoneware |
| D. | Cast iron |
| Answer» D. Cast iron | |
| 646. |
_ Out of the following, the rays having the lowest wavelength is the$? |
| A. | Radio waves |
| B. | Ultrasonic waves |
| C. | Infra red rays |
| D. | X-rays |
| Answer» B. Ultrasonic waves | |
| 647. |
_ Steel balls are manufactured by cold heading. After cold forming, they are subjected to$? |
| A. | Tempering |
| B. | Normalising |
| C. | Stress-relieving |
| D. | Artificial ageing |
| Answer» D. Artificial ageing | |
| 648. |
_ Function of fusible plug in a boiler is to$? |
| A. | Drain out water and sludge from the boiler during repair |
| B. | Put off fire in the furnace when water level in the boiler falls to unsafe limit |
| C. | Guard the boiler in case of abnormal rise in steam pressure |
| D. | All of the above |
| Answer» C. Guard the boiler in case of abnormal rise in steam pressure | |
| 649. |
_ The life of a ball bearing is inversely proportional to$? |
| A. | (load)1 |
| B. | (load)2 |
| C. | (load)3 |
| D. | (load)0.33 |
| Answer» D. (load)0.33 | |
| 650. |
_ Which of the following material handling equipments is not suitable for moving materials in varying paths?$? |
| A. | Hand trolley |
| B. | Belt conveyor |
| C. | Crane |
| D. | Truck |
| Answer» C. Crane | |