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.
| 351. |
*/*_In extrusion of metals, which of the following statement is true ?? |
| A. | Speed of the extruded material is same as that of ram speed |
| B. | Redundant work is a function of the die angle |
| C. | Relative motion between the billet surface and the container wall is always present |
| D. | Hollow ram is used for indirect extrusion |
| Answer» E. | |
| 352. |
*/*_Which of the following is an example of stress corrosion ?? |
| A. | Season cracking of brass |
| B. | Caustic embrittlement of steel |
| C. | Both (a) & (b) |
| D. | Neither (a) nor (b) |
| Answer» D. Neither (a) nor (b) | |
| 353. |
*/*_Speed of a submarine in deep sea & that of an aeroplane is measured by a/an? |
| A. | Pitot tube |
| B. | Hot wire anemometer |
| C. | Rotameter |
| D. | Stroboscope |
| Answer» B. Hot wire anemometer | |
| 354. |
*/*_Pick out the wrong statement. If the net positive suction head (NPSH) requirement of a pump is not satisfied, then? |
| A. | It will deliver low discharge of liquid |
| B. | Its efficiency will not be affected |
| C. | It will not develop sufficient head to raise water |
| D. | It will be cavitated |
| Answer» C. It will not develop sufficient head to raise water | |
| 355. |
*/*_To improve the machinability of steel, it is generally subjected to? |
| A. | Spherodising |
| B. | Tempering |
| C. | Normalising |
| D. | Annealing |
| Answer» B. Tempering | |
| 356. |
*/*_Compression ratio of an I.C. engine is the ratio of the? |
| A. | Clearance volume to the volume swept by piston per stroke |
| B. | Volume of air in cylinder before compression to that after compression |
| C. | Pressure after compression to that before compression |
| D. | None of these |
| Answer» C. Pressure after compression to that before compression | |
| 357. |
*/*_Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure.? |
| A. | Hexagonal close, packed (hcp) |
| B. | Face centred cubic (fcc) |
| C. | Body centred cubic (bcc) |
| D. | Simple cubic |
| Answer» E. | |
| 358. |
*/*_Grain hardness is measured by the __________ hardness testing method.? |
| A. | Knoop |
| B. | Rockwell F |
| C. | Shore sceleroscope |
| D. | Vicker's |
| Answer» B. Rockwell F | |
| 359. |
*/*_Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts same. Shafts made by __________ have residual stresses.? |
| A. | Forging |
| B. | Cold rolling |
| C. | Hot rolling |
| D. | Casting |
| Answer» C. Hot rolling | |
| 360. |
*/*_Fibrous fracture is normally encountered in the __________ materials.? |
| A. | Hard |
| B. | Elastic |
| C. | Ductile |
| D. | Brittle |
| Answer» D. Brittle | |
| 361. |
*/*_Scab is a defect developed during __________ of metals.? |
| A. | Forging |
| B. | Sand casting |
| C. | Machining |
| D. | Welding |
| Answer» C. Machining | |
| 362. |
*/*_Melting point & boiling points of liquid oxygen are respectively - 218.8°C & - 183°C, while the same for liquid nitrogen is - 210°C & - 195.8°C respectively. The difference in melting points of liquid oxygen & liquid nitrogen is not equal to 8.8? |
| A. | °C |
| B. | °F |
| C. | °K |
| D. | °R |
| Answer» C. ¬¨‚àûK | |
| 363. |
*/*_A jet engine turbine blade is normally manufactured by? |
| A. | Forging |
| B. | Shell moulding |
| C. | Investment casting |
| D. | Pressure die casting |
| Answer» D. Pressure die casting | |
| 364. |
*/*_A fine grained grinding wheel should not be used for grinding __________ materials.? |
| A. | Hard |
| B. | Brittle |
| C. | Soft & ductile |
| D. | None of these |
| Answer» D. None of these | |
| 365. |
*/*_Knocking tendency in a petrol engine decreases with increasing? |
| A. | Supercharging |
| B. | Compression ratio |
| C. | Wall temperature |
| D. | Engine speed |
| Answer» E. | |
| 366. |
*/*_The main charge in blast furnace is usually? |
| A. | Iron ore & coke |
| B. | Iron ore, coke & air |
| C. | Limestone, coke & iron ore |
| D. | Limestone, sand & iron ore |
| Answer» D. Limestone, sand & iron ore | |
| 367. |
*/*_The type of pump used for lifting large quantity of sewage is a __________ pump.? |
| A. | Gear |
| B. | Centrifugal |
| C. | Reciprocating |
| D. | Plunger |
| Answer» C. Reciprocating | |
| 368. |
*/*_The pH value is the measure of hydrogen ion concentration in a solution. The term pH stands for the __________ in the solution.? |
| A. | Power of hydrogen ion concentration |
| B. | Percentage of hydrogen ions |
| C. | Presence of hydrogen ions |
| D. | None of these |
| Answer» B. Percentage of hydrogen ions | |
| 369. |
*/*_Midrex process of sponge iron production uses reformed natural gas as the reducing agent, which uses iron ore in the form of? |
| A. | Lumps |
| B. | Pellets |
| C. | Briquettes |
| D. | Sinter |
| Answer» C. Briquettes | |
| 370. |
*/*_A thin, flat & square plate measuring 2 m x 2 m is freely hanging in ambient air at 25°C. It is exposed to the solar radiation falling on one side of the plate at the rate of 500 W/m ². The plate temperature will remain constant at 30°C, if the convective heat transfer co-efficient is __________ W/m² °C.? |
| A. | 50 |
| B. | 100 |
| C. | 150 |
| D. | 200 |
| Answer» C. 150 | |
| 371. |
*/*_Which of the following is an inedible oil ?? |
| A. | Corn oil |
| B. | Tallow oil |
| C. | Olive oil |
| D. | Cotton seed oil |
| Answer» C. Olive oil | |
| 372. |
*/*_The path and movements followed by men, materials & equipments in executing the activities is indicated by the? |
| A. | Travel charts |
| B. | Man-machine charts |
| C. | String diagram |
| D. | Flow diagram |
| Answer» E. | |
| 373. |
*/*_Maximum permissible air velocity in pipelines is about __________ metre/second.? |
| A. | 5 |
| B. | 10 |
| C. | 20 |
| D. | 40 |
| Answer» C. 20 | |
| 374. |
*/*_Heat flow across a hollow sphere of inner radius 'r‚ÇÅ' and outer radius 'r‚ÇÇ' is directly proportional to? |
| A. | (r‚ÇÇ - r‚ÇÅ)/(r‚ÇÅ - r‚ÇÇ) |
| B. | (r‚ÇÇ . r‚ÇÅ)/(r‚ÇÇ - r‚ÇÅ) |
| C. | (r‚ÇÅ + r‚ÇÇ)/(r‚ÇÅ . r‚ÇÇ) |
| D. | (r‚ÇÅ . r‚ÇÇ)/(r‚ÇÅ + r‚ÇÇ) |
| Answer» C. (r‚Äö√á√Ö + r‚Äö√á√á)/(r‚Äö√á√Ö . r‚Äö√á√á) | |
| 375. |
*/*_A good abrasive? |
| A. | Should be friable |
| B. | Should have low refractoriness |
| C. | Is made up of large size of crystals |
| D. | Should be soft |
| Answer» B. Should have low refractoriness | |
| 376. |
*/*_Vibration upto 100 kilo hertz can be most accurately measured by a __________ type accelerometer.? |
| A. | Preloaded spring |
| B. | Piezoelectric |
| C. | Bonded strain gauge |
| D. | None of these |
| Answer» C. Bonded strain gauge | |
| 377. |
*/*_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 | |
| 378. |
*/*_When metals are heated to high temperature, their __________ increases in general.? |
| A. | Atomic vibration |
| B. | Creep strength |
| C. | Yield stress & ultimate tensile strength |
| D. | Toughness & stiffness |
| Answer» B. Creep strength | |
| 379. |
*/*_In case of brasses, with decreasing zinc percentage and increasing copper percentage, its __________ increases.? |
| A. | Percentage elongation |
| B. | Brinell hardness |
| C. | Tensile strength |
| D. | All of the above |
| Answer» B. Brinell hardness | |
| 380. |
*/*_In Newton's law of viscosity, which states that the shear stress is proportional to the __________ Co-efficient of viscosity is called dynamic or absolute viscosity(where, V = velocity, Vg = velocity gradient ).? |
| A. | V² |
| B. | 1/V² |
| C. | 1/Vg |
| D. | Vg |
| Answer» E. | |
| 381. |
*/*___________ number is sometimes used in place of Grashoff number in free convection heat transfer.? |
| A. | Stanton |
| B. | Brinkman |
| C. | Rayleigh |
| D. | Nusselt |
| Answer» D. Nusselt | |
| 382. |
*/*_Co-efficient of performance of a Carnot cycle refrigerator operating between - 23°C and + 27°C is? |
| A. | 3 |
| B. | 5 |
| C. | 0.5 |
| D. | 1.5 |
| Answer» C. 0.5 | |
| 383. |
*/*_Boiler rating is normally done in terms of? |
| A. | Steam temperature & pressure |
| B. | Steam output (tons/hr) |
| C. | Heat transfer rate (kcal/hr) |
| D. | Heat transfer area (m²) |
| Answer» C. Heat transfer rate (kcal/hr) | |
| 384. |
*/*_Earing is a defect found in steels after the following metal working operation (s).? |
| A. | Deep drawing |
| B. | Rolling |
| C. | Extrusion |
| D. | Wire drawing |
| Answer» B. Rolling | |
| 385. |
*/*_Multistage compression is necessary for high efficiency,? |
| A. | If the ratio of the delivery pressure to the intake pressure exceeds 5:1 |
| B. | When large amount of gas is to be compressed |
| C. | When the delivered gas is desired at very high velocity |
| D. | None of these |
| Answer» B. When large amount of gas is to be compressed | |
| 386. |
*/*_Difference at any instant between the value of the controlled variable and the set point is called the? |
| A. | Deviation |
| B. | Derivative time |
| C. | Error ratio |
| D. | Differential gap |
| Answer» B. Derivative time | |
| 387. |
*/*_Electrode potential is not concerned with the measurment of? |
| A. | PH value |
| B. | Temperature |
| C. | Viscosity |
| D. | Density |
| Answer» C. Viscosity | |
| 388. |
*/*_Maxwell's thermodynamic relations applies to the? |
| A. | Chemical systems in equilibrium |
| B. | Mechanical systems in equilibrium |
| C. | Irreversible thermodynamic processes |
| D. | Reversible thermodynamic processes |
| Answer» B. Mechanical systems in equilibrium | |
| 389. |
*/*_Leakage in a cooking gas cylinder is detected by? |
| A. | Radio-isotopes |
| B. | Pouring soap solution on the surface and locating the gas bubbles |
| C. | Halide torch |
| D. | Pungent smell of mercaptans present in the gas |
| Answer» E. | |
| 390. |
*/*_Eutectoid composition of carbon steel at room temperature is? |
| A. | Cementite |
| B. | Pearlite |
| C. | Martensite |
| D. | Ferrite |
| Answer» C. Martensite | |
| 391. |
*/*_Addition of __________ to steel does not help in improving its machinability.? |
| A. | Sulphur |
| B. | Silicon |
| C. | Lead |
| D. | Phosphorous |
| Answer» C. Lead | |
| 392. |
*/*_The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as? |
| A. | Rigid |
| B. | Tough |
| C. | Ductile |
| D. | Plastic |
| Answer» D. Plastic | |
| 393. |
*/*_Which of the following emissions in the exhaust gas of an I.C. engine causes the formation of photochemical smog?? |
| A. | Nitrogen oxides |
| B. | Hydrocarbons |
| C. | Both A & B |
| D. | Carbon monoxide |
| Answer» D. Carbon monoxide | |
| 394. |
*/*_Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron.? |
| A. | Manganese |
| B. | Phosphorous |
| C. | Magnesium |
| D. | Chromium |
| Answer» D. Chromium | |
| 395. |
*/*_Babbit lining is used on brass/bronze bearings to increase the? |
| A. | Antifriction properties |
| B. | Compressive strength |
| C. | Bearing resistance |
| D. | Wear resistance |
| Answer» E. | |
| 396. |
*/*_Ingrannular corrosion occurs __________ stainless steel.? |
| A. | In all types of steels except |
| B. | At the surface of |
| C. | Along grain boundaries of |
| D. | In the core of |
| Answer» D. In the core of | |
| 397. |
*/*_The ability of a substance to assume two or more crystalline structure is called? |
| A. | Isomorphism |
| B. | Polymorphism |
| C. | Amorphism |
| D. | Isomerism |
| Answer» C. Amorphism | |
| 398. |
*/*_Old cycle handles are coated with nickel using? |
| A. | Cementation |
| B. | Spray coating |
| C. | Galvanising process |
| D. | Tinning process |
| Answer» C. Galvanising process | |
| 399. |
*/*_Use of water as a manometric liquid suffers from the disadvantage of its? |
| A. | Low vapour pressure |
| B. | Corrosive nature |
| C. | High vapour pressure |
| D. | High boiling point |
| Answer» D. High boiling point | |
| 400. |
*/*_Which of the following forces does not act on a fluid at rest?? |
| A. | Viscous force |
| B. | Gravity force |
| C. | Hydrostatic force |
| D. | Surface tension force |
| Answer» B. Gravity force | |