MCQOPTIONS
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MCQOPTIONS
This section includes 2253 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. |
Sand used to stop the green sand from sticking to the pattern is termed as the ______________ sand? |
| A. | Parting |
| B. | Synthetic |
| C. | Loam |
| D. | Dry |
| Answer» B. Synthetic | |
| 302. |
Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode________________? |
| A. | Occurs higher in the electro-chemical series of metals |
| B. | Is exemplified by magnesium plate |
| C. | Is much cheaper than the cathodic base material to be guarded against corrosion |
| D. | All A, B. & C. |
| Answer» E. | |
| 303. |
Runge-Kutta method is used to solve a/an __________________________? |
| A. | Ordinary differential equation of nth order |
| B. | Simultaneous non-linear equation |
| C. | Linear differential equation |
| D. | None of these |
| Answer» C. Linear differential equation | |
| 304. |
_______________ rubber is generally used for making ‘O’ rings used for vacuum sealings? |
| A. | Natural |
| B. | Neoprene |
| C. | Butadiene |
| D. | Nitrile |
| Answer» C. Butadiene | |
| 305. |
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 | |
| 306. |
Reynolds number of a fluid flowing in a circular pipe is 10,000. What will be the Reynolds number when the fluid velocity is decreased by 30% & the pipe diameter is increased by 30% ? |
| A. | 9,100 |
| B. | 13,000 |
| C. | 7,000 |
| D. | 2,550 |
| Answer» B. 13,000 | |
| 307. |
Resistance of an electrical conductor is proportional to its (where, l = length and A = crosssectional area of the conductor)________________? |
| A. | A |
| B. | l |
| C. | A2 |
| D. | Both A. & B. |
| Answer» E. | |
| 308. |
Resilience of a bolt can be increased by increasing its __________________? |
| A. | Length |
| B. | Shank diameter |
| C. | Head diameter |
| D. | None of these |
| Answer» B. Shank diameter | |
| 309. |
Removal of non-condensable from steam or other vapour is termed as the ________________ process? |
| A. | Condensation |
| B. | Deaeration |
| C. | Scavenging |
| D. | Exhaust |
| Answer» C. Scavenging | |
| 310. |
Regeneration of molecular sieve requires it to be heated to a temperature of about __________________ °C? |
| A. | 80-120 |
| B. | 200-300 |
| C. | 600-800 |
| D. | 1000-1100 |
| Answer» E. | |
| 311. |
Reduction in the grain size reduces the _________________ of the material? |
| A. | Fatigue resistance |
| B. | Tensile strength |
| C. | Creep resistance |
| D. | All A, B. & C |
| Answer» E. | |
| 312. |
Recrystallisation temperature of steel is ______________________ °C? |
| A. | 50 |
| B. | 300 |
| C. | 500 |
| D. | 800 |
| Answer» E. | |
| 313. |
Rankine cycle comprises of two isothermal and two ___________________ processes? |
| A. | Isobaric |
| B. | Polytropic |
| C. | Isentropic |
| D. | None of these |
| Answer» E. | |
| 314. |
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 | |
| 315. |
Quartz is a ________________ material ? |
| A. | Diamagnetic |
| B. | Ferromagnetic |
| C. | Ferroelectric |
| D. | Piezoelectric |
| Answer» E. | |
| 316. |
Property responsible for the talcum powder to cling to the skin is the__________________? |
| A. | Capillary action |
| B. | Adhesion |
| C. | Cohesion |
| D. | Surface tension |
| Answer» C. Cohesion | |
| 317. |
________________ property of steel increases by addition of large amount of silicon in it? |
| A. | Mechanical |
| B. | Machining |
| C. | Magnetic |
| D. | Refractory |
| Answer» D. Refractory | |
| 318. |
_________________ property of a material is determined by the Herbert Pendulum device? |
| A. | Hardness |
| B. | Tensile |
| C. | Toughness |
| D. | Compressive |
| Answer» B. Tensile | |
| 319. |
Projection welding & stud welding is categorised as the _______________ welding? |
| A. | Pressure |
| B. | Thermit |
| C. | Resistance |
| D. | Arc |
| Answer» D. Arc | |
| 320. |
Production of one ton of paper in Indian paper industry consumes about ____________ kWh of electricity ? |
| A. | 300 |
| B. | 800 |
| C. | 1400 |
| D. | 2000 |
| Answer» D. 2000 | |
| 321. |
Production of a hollow product by inflation of a tube or parison is called the _______________ process? |
| A. | Blow moulding |
| B. | Calendaring |
| C. | Extrusion |
| D. | Injection |
| Answer» B. Calendaring | |
| 322. |
Probability of cavitation occuring becomes very high, when the local _______________ resulting ?_x005F_x000D_in water bubbles formation, which on rupture cause cavitation |
| A. | Pressure falls below the vapour pressure |
| B. | Pressure becomes very high |
| C. | Temperature becomes low |
| D. | All A, B & C |
| Answer» E. | |
| 323. |
Principal alloying elements of cast tool alloys which have very high wear resistance & high temperature strength are ? |
| A. | Cobalt, chromium & tungsten |
| B. | Cobalt, chromium & nickel |
| C. | Molybdenum, tungsten & chromium |
| D. | Cobalt, zirconium & molybdenum |
| Answer» B. Cobalt, chromium & nickel | |
| 324. |
Primary designation of steel is based on its__________________? |
| A. | Hardness & tensile strength |
| B. | Carbon content |
| C. | Iron content |
| D. | Alloying elements content |
| Answer» E. | |
| 325. |
Pressure required to increase the density of water by about 1% is ____________________ atmosphere? |
| A. | 10 |
| B. | 50 |
| C. | 200 |
| D. | 1000 |
| Answer» D. 1000 | |
| 326. |
Presence of nickel & chromium in steel does not raise its _________________? |
| A. | Elastic limit |
| B. | Machining properties |
| C. | Ductility |
| D. | Resilience |
| Answer» B. Machining properties | |
| 327. |
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. | |
| 328. |
Powder metallurgy technique is used in the production of ____________________ tools ? |
| A. | Tungsten carbide |
| B. | High carbon steel |
| C. | High speed steel |
| D. | Drilling |
| Answer» B. High carbon steel | |
| 329. |
Powder metallurgy process does not make metal powder by_________________________? |
| A. | Atomisation |
| B. | Grinding/milling |
| C. | Hammering |
| D. | Electrolytic deposition |
| Answer» D. Electrolytic deposition | |
| 330. |
Powder metallurgy is used to produce__________________? |
| A. | High precision components with complex cavities and sharp features |
| B. | Components of large size |
| C. | Porosity free components |
| D. | Components of such alloys whose constituents do not form alloys readily |
| Answer» D. Components of such alloys whose constituents do not form alloys readily | |
| 331. |
Potable water means the water used for____________________? |
| A. | Fire-fighting |
| B. | Cooling |
| C. | Drinking |
| D. | Evaporation to produce steam |
| Answer» D. Evaporation to produce steam | |
| 332. |
Plastics as a material of construction suffer from the drawback of low_________________? |
| A. | Machinability |
| B. | Density |
| C. | Strength |
| D. | Plastic deformation |
| Answer» D. Plastic deformation | |
| 333. |
Plasma is_____________________? |
| A. | A high temperature neutral gas |
| B. | Nothing but ionised gas |
| C. | A source of steady and highest controllable pressure |
| D. | Formed at very low temperature |
| Answer» C. A source of steady and highest controllable pressure | |
| 334. |
Plants produce carbohydrates from the CO2 present in the atmosphere by_________________? |
| A. | Polymerisation |
| B. | Photochemical reaction |
| C. | Oxidation |
| D. | None of these |
| Answer» C. Oxidation | |
| 335. |
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 | |
| 336. |
______________ pipe is the most suitable for carrying sanitary drainage? |
| A. | Stainless steel |
| B. | Reinforced cement concrete |
| C. | Cast iron |
| D. | Asbestos cement |
| Answer» D. Asbestos cement | |
| 337. |
Pick out the wrong statement ? |
| A. | A ferromagnetic material becomes paramagnetic above the ‘Curie temperature’ |
| B. | Permanent magnets are made of hard materials, whereas electromagnets require soft magnetic materials |
| C. | Soft magnetic materials (e.g., pure iron) have higher permeability and low hysterisis loss and coercive forces |
| D. | Tungsten steel and alnico are not hard magnetic materials |
| Answer» E. | |
| 338. |
Pick out the wrong statement about the machinability of metals. Machinability of a metal ? |
| A. | Decreases with increase in strain hardening tendencies |
| B. | Decreases with increase in hardness, in general |
| C. | Depend on the composition, microstructure and physical & mechanical properties |
| D. | Decreases with increases in tensile strength & decrease in grain size |
| Answer» E. | |
| 339. |
Pick out the wrong statement about coating/electroplating of metals ? |
| A. | Phosphate coating is used as an excellent base for paints & enamels |
| B. | Phosphate coating is less corrosion resistant than chromate coating |
| C. | The base metal to be electroplated is normally made the cathode of the electrolytic cell and coating metal is made the anode |
| D. | Calorising is the process of coating steel with chromium |
| Answer» E. | |
| 340. |
Pick out the wrong statement about nucleate boiling ? |
| A. | Bubble generation is by expansion of entrapped gas/vapour at small cavities in the surface |
| B. | Surface temperature is greater than the saturation temperature of the liquid |
| C. | Heat transfer from the surface of the liquid is less than that in film boiling |
| D. | The temperature is less than that of film boiling |
| Answer» E. | |
| 341. |
Pick out the wrong conversion of absolute & kinematic viscosities ? |
| A. | 1 stoke = 1 cm2/sec |
| B. | 1 N.sec/m2 = 10 paise |
| C. | 1 stoke = 1 m2/sec |
| D. | 1 m2/sec = 104 stokes |
| Answer» D. 1 m2/sec = 104 stokes | |
| 342. |
Pick out the correct statement about the condensation? |
| A. | Filmwise condensation gives a lower heat transfer rate than the dropwise condensation |
| B. | Suitable coating or vapour additive is used to promote film wise condensation |
| C. | If a condensing liquid does not wet the surface dropwise, even then condensation will take place on it |
| D. | Reynolds number of condensing liquid is based on its mass flow rate |
| Answer» C. If a condensing liquid does not wet the surface dropwise, even then condensation will take place on it | |
| 343. |
Pick out the correct combination about the role of various additives used in polymers ? |
| A. | Plasticiser: increases the polymer strength |
| B. | Heat stabiliser: increases the maximum service temperature |
| C. | Fillers: Does not affect the property of polymer but increases its weight |
| D. | Lubricants: increases the flexibility of polymers |
| Answer» D. Lubricants: increases the flexibility of polymers | |
| 344. |
Photographic plates are coated with _____________________? |
| A. | Silver nitrate |
| B. | Silver halide |
| C. | Calcium silicate |
| D. | Metallic silver |
| Answer» C. Calcium silicate | |
| 345. |
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 | |
| 346. |
Percentage of argon (by volume) in dry atmospheric air is about________________? |
| A. | 0.09 |
| B. | 0.3 |
| C. | 0.57 |
| D. | 0.94 |
| Answer» E. | |
| 347. |
Pearlite comprises of__________________? |
| A. | 87% cementite & 13% Fe |
| B. | 87% ferrite & 13% cementite |
| C. | 93.33% ferrite & 6.67% C |
| D. | 87% ferrite & 13% C |
| Answer» C. 93.33% ferrite & 6.67% C | |
| 348. |
Particle nature of cathode rays is proved due to the fact that they ________________? |
| A. | Travel in a straight line |
| B. | Get deflected by magnetic electric field |
| C. | Produce fluorescence |
| D. | Heat the exposed material |
| Answer» C. Produce fluorescence | |
| 349. |
Parallel straight line pattern of temperature distribution for both hot and cold fluids is observed in case of heat exchanger of the type________________? |
| A. | Parallel flow with equal heat capacities |
| B. | Counter flow with equal heat capacities |
| C. | Counter flow with unequal heat capacities |
| D. | Parallel flow with unequal heat capacities |
| Answer» C. Counter flow with unequal heat capacities | |
| 350. |
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 | |