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.
| 651. |
Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of_____________________? |
| A. | 90% tungsten carbide and 10% cobalt |
| B. | 70% aluminium oxide & 30% silica |
| C. | 30% nickel, 15% chromium & 55% tungsten |
| D. | 65% tungsten & 35% zirconium |
| Answer» B. 70% aluminium oxide & 30% silica | |
| 652. |
Capacity & power requirement for an air compressor working at high altitude compared to sea-level will be_______________? |
| A. | More |
| B. | Less |
| C. | Same |
| D. | Either more or less; depends on the climatic conditions |
| Answer» C. Same | |
| 653. |
______________ cannot increase the fatigue strength of a material? |
| A. | Grain refining |
| B. | Grain coarsening |
| C. | Surface hardening |
| D. | Shot peening |
| Answer» C. Surface hardening | |
| 654. |
_________________ can replace tungsten in high speed steel ? |
| A. | Chromium |
| B. | Vanadium |
| C. | Cobalt |
| D. | Molybdenum |
| Answer» D. Molybdenum | |
| 655. |
Calorific value of ____________________ are almost same? |
| A. | Lignite & anthracite coal |
| B. | Lignite & coal gas |
| C. | Petrol & diesel |
| D. | Coal gas & natural gas |
| Answer» D. Coal gas & natural gas | |
| 656. |
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 | |
| 657. |
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 | |
| 658. |
Breakeven point represents the condition, when the company runs under no profit no loss condition. In break even analysis, total cost comprises of fixed cost________________? |
| A. | Only |
| B. | Plus variable cost |
| C. | Plus overhead cost |
| D. | Plus selling expenses |
| Answer» C. Plus overhead cost | |
| 659. |
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) | |
| 660. |
Brazing filler metal used for joining steel plates_________________? |
| A. | Melts below the melting points of base metals |
| B. | Melts below 300°C |
| C. | Is copper phosphorous alloy |
| D. | Is copper |
| Answer» B. Melts below 300°C | |
| 661. |
Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than ? |
| A. | 5 |
| B. | 10 |
| C. | 20 |
| D. | 35 |
| Answer» D. 35 | |
| 662. |
Boiling point of water gets lowered at high altitudes (e.g., hills), because ___________________? |
| A. | Temperature is low |
| B. | Atmospheric pressure is low |
| C. | Atmospheric pressure is high |
| D. | None of these |
| Answer» C. Atmospheric pressure is high | |
| 663. |
Boiler tube size is specified by its thickness and _____________________ diameter ? |
| A. | Outside |
| B. | Inside |
| C. | Mean |
| D. | None of these |
| Answer» B. Inside | |
| 664. |
Boiler draught of 10 mm water column is equivalent to_____________________? |
| A. | 1 kgf/m2 |
| B. | 10 kgf/m2 |
| C. | 10 kgf/mm2 |
| D. | 1 kgf/mm2 |
| Answer» C. 10 kgf/mm2 | |
| 665. |
Blow off cock is provided in steam boiler to ____________________? |
| A. | Guard the boiler in case of abnormal rise in steam pressure |
| B. | Drain out water and sludge during its repair |
| C. | Regulate the supply of water in boiler |
| D. | Put out the fire in the furnace when the water level in the boiler falls to unsafe limit |
| Answer» C. Regulate the supply of water in boiler | |
| 666. |
Blasting of tri-nitro-toluene (TNT) is done by mixing it with ammonium_______________? |
| A. | Nitrate |
| B. | Sulphate |
| C. | Carbonate |
| D. | Chloride |
| Answer» B. Sulphate | |
| 667. |
Blast furnace slag is mainly molten_________________? |
| A. | Sand |
| B. | Magnesium silicate |
| C. | Calcium silicate |
| D. | Iron pyrite |
| Answer» D. Iron pyrite | |
| 668. |
Biological shield in a nuclear reactor is generally provided to protect against the__________________? |
| A. | α-rays |
| B. | β-rays |
| C. | Gamma rays & neutrons |
| D. | Electrons |
| Answer» D. Electrons | |
| 669. |
Batch process is preferred over continuous process, when the___________________? |
| A. | Product yields and quality cannot be achieved in continuous process, because of long residence time |
| B. | Sales demand of product is not steady |
| C. | Same equipment cannot be used for several processes of the same nature |
| D. | All (A), B. & (C) |
| Answer» C. Same equipment cannot be used for several processes of the same nature | |
| 670. |
Basic open hearth furnace (BOF) is not used for producing ______________ steel? |
| A. | Killed |
| B. | Rimming |
| C. | High alloy |
| D. | None of these |
| Answer» D. None of these | |
| 671. |
Baffles provided on the shell side of a shell and tube heat exchanger are meant for _____________________? |
| A. | Providing support for the tubes |
| B. | Improving heat transfer |
| C. | Both A & B |
| D. | Preventing the fouling of tubes & stagnation of shell side fluid |
| Answer» D. Preventing the fouling of tubes & stagnation of shell side fluid | |
| 672. |
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 | |
| 673. |
Auto collimator is used to check____________________? |
| A. | Flatness |
| B. | Angle |
| C. | Rotor balancing |
| D. | Roughness |
| Answer» C. Rotor balancing | |
| 674. |
Austempering process results in the formation of ________________ structure ? |
| A. | Martensitic |
| B. | Bainitic |
| C. | Carburised |
| D. | Stressed |
| Answer» C. Carburised | |
| 675. |
Austempering of steel requires it to be heated to 875°C followed by sudden cooling to 250- 525°C, thereby changing austenite to___________________? |
| A. | Sorbite |
| B. | Bainite |
| C. | Martensite |
| D. | Troostite |
| Answer» C. Martensite | |
| 676. |
Atomic _________________ of an element is a whole number ? |
| A. | Weight |
| B. | Number |
| C. | Volume |
| D. | Radius |
| Answer» C. Volume | |
| 677. |
Atomic _______________ is a whole number for an element? |
| A. | Number |
| B. | Weight |
| C. | Radius |
| D. | None of these |
| Answer» B. Weight | |
| 678. |
At the point of boundary layer separation in fluid flow, the _____________________? |
| A. | Shear stress is maximum |
| B. | Velocity gradient is flat |
| C. | Density variation is maximum |
| D. | Shear stress is zero |
| Answer» B. Velocity gradient is flat | |
| 679. |
At absolute zero temperature, for any reaction involving condensed phases ? |
| A. | Δ G° = 0 , Δ H° = 0 |
| B. | Δ H° = 0 , Δ S° = 0 |
| C. | Δ S° = 0 , Δ E° = 0 |
| D. | Δ S° = 0 , Δ Cp° = 0 |
| Answer» D. Δ S° = 0 , Δ Cp° = 0 | |
| 680. |
At 100% relative humidity, the dew point temperature of moist air is_________________? |
| A. | Less than the wet bulb temperature |
| B. | More than the wet bulb temperature |
| C. | Equal to the wet bulb temperature |
| D. | Equal to the ambient temperature |
| Answer» C. Equal to the wet bulb temperature | |
| 681. |
As the fluid flow rate increases, the float of the Rotameter____________________? |
| A. | Rises in the tube |
| B. | Rotates at higher speed |
| C. | Rotates at lower speed |
| D. | Drops down in the tube |
| Answer» B. Rotates at higher speed | |
| 682. |
As per the Indian boiler regulation (IBR), the type of joint preferred for the circumferential joint is the _____________ joint ? |
| A. | Butt |
| B. | Lap |
| C. | Welded |
| D. | None of these |
| Answer» C. Welded | |
| 683. |
As per international norms, the maximum permissible value of noise level in the industrial environment is _____________ decibels as measured at a distance of 1.5 meters from the source of noise? |
| A. | 110 |
| B. | 85 |
| C. | 60 |
| D. | 45 |
| Answer» C. 60 | |
| 684. |
____________________ 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 | |
| 685. |
Annealing of white cast iron produces _____________________ iron? |
| A. | Grey |
| B. | Nodular |
| C. | Malleable |
| D. | Spheroidal |
| Answer» D. Spheroidal | |
| 686. |
Angular displacement can be measured suitably by a______________________? |
| A. | Shaft encoder |
| B. | Linear variable differential transducer (LVDT) |
| C. | Stroboscope |
| D. | Tachometer |
| Answer» B. Linear variable differential transducer (LVDT) | |
| 687. |
An oxidation process is accompanied with decrease in the____________________? |
| A. | Number of electrons |
| B. | Oxidation number |
| C. | Number of ions |
| D. | All A , B. & C. |
| Answer» B. Oxidation number | |
| 688. |
An example of unsteady non uniform flow is the flow of liquid under pressure through a__________________? |
| A. | Tapering pipe at constant flow rate |
| B. | Tapering pipe at either decreasing or increasing flow rate |
| C. | Long pipeline of constant diameter |
| D. | None of these |
| Answer» C. Long pipeline of constant diameter | |
| 689. |
An approximately _____________ process exemplifies the flow of a gas through a very long pipe of uniform cross-section ? |
| A. | Adiabatic |
| B. | Isothermal |
| C. | Isentropic |
| D. | Isochoric |
| Answer» C. Isentropic | |
| 690. |
An alloy of Fe – 0.4 % C is__________________? |
| A. | Cast iron |
| B. | Hypo-eutectoid steel |
| C. | Hyper-eutectoid steel |
| D. | Eutectoid steel |
| Answer» C. Hyper-eutectoid steel | |
| 691. |
An abrupt and sudden fall in the reading of barometer is an indication of the____________________? |
| A. | Storm |
| B. | Rain |
| C. | Clear weather |
| D. | Cold wave |
| Answer» B. Rain | |
| 692. |
‘Amortization’ in respect of financial obligation of a company means the_____________________? |
| A. | Liquidation of financial obligations on instalment basis |
| B. | Commitment of financial obligation on priority |
| C. | Liquidation of all the obsolete equipments of the company |
| D. | Modernisation of the plant equipments |
| Answer» B. Commitment of financial obligation on priority | |
| 693. |
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 | |
| 694. |
Ammonia gas can be dried by___________________? |
| A. | PCl5 |
| B. | Quick lime |
| C. | CaCl2 |
| D. | Concentrated H2SO4 |
| Answer» C. CaCl2 | |
| 695. |
Aluminium is extracted from____________________? |
| A. | Chalcocite |
| B. | Bauxite |
| C. | Galena |
| D. | None of these |
| Answer» C. Galena | |
| 696. |
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 Al2O3 |
| B. | 3CaO. Al2O3 |
| C. | 3CaO. SiO2 |
| D. | 2CaO. SiO2 |
| Answer» B. 3CaO. Al2O3 | |
| 697. |
Alloys having more than 80% copper are generally more______________________? |
| A. | Abrasion resistant |
| B. | Corrosion resistant |
| C. | Prone to season cracking |
| D. | Machinable |
| Answer» C. Prone to season cracking | |
| 698. |
Alloying elements present in Haynes stellite, which has superior performance than high speed steel, are____________________? |
| A. | Nickel, cobalt & chromium |
| B. | Tungsten, chromium & cobalt |
| C. | Manganese, chromium & cobalt |
| D. | Tungsten, molybdenum & nickel |
| Answer» C. Manganese, chromium & cobalt | |
| 699. |
Alloy powder manufactured by the following process have spherical shapes ? |
| A. | Electrochemical deposition |
| B. | Gaseous reduction |
| C. | Atomisation |
| D. | Mechanical attrition |
| Answer» D. Mechanical attrition | |
| 700. |
All the atoms of the world comprise of electrons, proton & neutron except that of ______________ atom in which neutron is absent ? |
| A. | Deuterium |
| B. | Hydrogen |
| C. | Neon |
| D. | Helium |
| Answer» C. Neon | |