0% 0 Chemical Engineering Basics Quiz 3 1 / 50 Brazing is the joining of metals_______? Both A. & B. With a non-ferrous filler Neither A. nor (B) Without melting the base metal 2 / 50 Brittleness induced due to the presence of sulphur in steel can be reduced by adding_______? Manganese Vanadium Copper Magnesium 3 / 50 Atomic ________ is a whole number for an element? Number Radius None of these Weight 4 / 50 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? 110 45 60 85 5 / 50 Change in volume of metals from absolute zero temperature to their melting points is_____? Less for high melting point metals Almost same for all metals Less for low melting point metals Different for different metals 6 / 50 Austempering of steel requires it to be heated to 875?C followed by sudden cooling to 250- 525?C, thereby changing austenite to_____? Bainite Sorbite Troostite Martensite 7 / 50 Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of_______? 65% tungsten & 35% zirconium 90% tungsten carbide and 10% cobalt 70% aluminium oxide & 30% silica 30% nickel, 15% chromium & 55% tungsten 8 / 50 Baffles provided on the shell side of a shell and tube heat exchanger are meant for _______? Both A & B Providing support for the tubes Improving heat transfer Preventing the fouling of tubes & stagnation of shell side fluid 9 / 50 Angular displacement can be measured suitably by a________? Shaft encoder Linear variable differential transducer (LVDT) Tachometer Stroboscope 10 / 50 An abrupt and sudden fall in the reading of barometer is an indication of the______? Clear weather Storm Cold wave Rain 11 / 50 An alloy of Fe ? 0.4 % C is___________? Eutectoid steel Cast iron Hypo-eutectoid steel Hyper-eutectoid steel 12 / 50 Case hardening is not done by_________? Electroplating Both ?B? & ?C? Nitriding Hot dipping 13 / 50 Brittleness induced due to the presence of sulphur in steel can be reduced by adding______? Vanadium Manganese Magnesium Copper 14 / 50 Biological shield in a nuclear reactor is generally provided to protect against the___________? Electrons Gamma rays & neutrons ?-rays ?-rays 15 / 50 Carbon is present in the form of _________ in grey cast iron ? Flakes Cementite Nodular aggregates of graphite Spheroids 16 / 50 As per the Indian boiler regulation (IBR), the type of joint preferred for the circumferential joint is the ______ joint ? None of these Lap Welded Butt 17 / 50 Auto collimator is used to check______? Roughness Flatness Rotor balancing Angle 18 / 50 Cascade control is_____? All A, B & C The continuous adjustment of the set point index of an automatic control loop by a primary(master) controller Useful to control flow from temperature Used when changes in process conditions cause serious upsets in the controlled variable 19 / 50 Bad odour in sanitary latrines is reduced by periodically sprinkling_______? Bleaching powder Lime powder Aluminium sulphate None of these 20 / 50 Boiling point of water gets lowered at high altitudes (e.g., hills), because _____? Atmospheric pressure is low None of these Temperature is low Atmospheric pressure is high 21 / 50 Annealing of white cast iron produces _______ iron? Nodular Grey Spheroidal Malleable 22 / 50 Boiler tube size is specified by its thickness and _______ diameter ? Outside None of these Inside Mean 23 / 50 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 ? 35 5 20 10 24 / 50 Batch process is preferred over continuous process, when the_____? Same equipment cannot be used for several processes of the same nature Product yields and quality cannot be achieved in continuous process, because of long residence time All (A), B. & (C) Sales demand of product is not steady 25 / 50 Cemented carbide tools are not suitable for cutting_____? Cast iron Brass Steel Aluminium 26 / 50 Case hardening of a material is___________? Carried out to get extreme hardness in its core Followed by tempering or carburising Preceded by its tempering Done to get a soft ductile interior with a very hard surface 27 / 50 An approximately ______ process exemplifies the flow of a gas through a very long pipe of uniform cross-section ? Adiabatic Isochoric Isentropic Isothermal 28 / 50 Boiler draught of 10 mm water column is equivalent to_______? 10 kgf/mm2 10 kgf/m2 1 kgf/m2 1 kgf/mm2 29 / 50 An oxidation process is accompanied with decrease in the______? Number of electrons Number of ions Oxidation number All A , B. & C. 30 / 50 Capacity & power requirement for an air compressor working at high altitude compared to sea-level will be________? Either more or less; depends on the climatic conditions Same More Less 31 / 50 Blast furnace slag is mainly molten__________? Sand Calcium silicate Magnesium silicate Iron pyrite 32 / 50 Cementite is in the lamellar form in the _______ phase of steel ? Pearlitic Ferritic Martenistic Bainitic 33 / 50 Brazing filler metal used for joining steel plates__________? Melts below the melting points of base metals Melts below 300?C Is copper phosphorous alloy Is copper 34 / 50 Blasting of tri-nitro-toluene (TNT) is done by mixing it with ammonium________? Sulphate Chloride Carbonate Nitrate 35 / 50 Atomic __________ of an element is a whole number ? Volume Number Weight Radius 36 / 50 Catalyst used in the catalytic converter employed in automobiles to convert CO into CO2 and for complete oxidation of un-burnt hydrocarbons is_____? Platinum Nickel Cobalt Vanadium 37 / 50 Cast iron contains ______ percent carbon? 2.5 5.25 3.75 4.75 38 / 50 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_________? Plus overhead cost Only Plus selling expenses Plus variable cost 39 / 50 Cassiterite is an ore of__________? Molybdenum Tin Lead Chromium 40 / 50 At absolute zero temperature, for any reaction involving condensed phases ? ? H? = 0 , ? S? = 0 ? S? = 0 , ? E? = 0 ? S? = 0 , ? Cp? = 0 ? G? = 0 , ? H? = 0 41 / 50 Carnot cycle is also termed as the constant __________ cycle in thermodynamics? Volume Pressure Entropy Heat 42 / 50 As the fluid flow rate increases, the float of the Rotameter______? Rotates at higher speed Drops down in the tube Rotates at lower speed Rises in the tube 43 / 50 Austempering process results in the formation of _________ structure ? Carburised Martensitic Stressed Bainitic 44 / 50 An example of unsteady non uniform flow is the flow of liquid under pressure through a___________? None of these Tapering pipe at constant flow rate Long pipeline of constant diameter Tapering pipe at either decreasing or increasing flow rate 45 / 50 Carbon supply in pack carburising process is in the form of _____? Hydrocarbon oil Calcium carbide Charcoal Graphite 46 / 50 Basic open hearth furnace (BOF) is not used for producing _______ steel? Killed None of these High alloy Rimming 47 / 50 Blow off cock is provided in steam boiler to ______? Guard the boiler in case of abnormal rise in steam pressure Regulate the supply of water in boiler Drain out water and sludge during its repair Put out the fire in the furnace when the water level in the boiler falls to unsafe limit 48 / 50 Calorific value of ______ are almost same? Coal gas & natural gas Lignite & anthracite coal Petrol & diesel Lignite & coal gas 49 / 50 At 100% relative humidity, the dew point temperature of moist air is__________? More than the wet bulb temperature Equal to the ambient temperature Less than the wet bulb temperature Equal to the wet bulb temperature 50 / 50 At the point of boundary layer separation in fluid flow, the _______? Density variation is maximum Velocity gradient is flat Shear stress is zero Shear stress is maximum Provide Your Information Your score is The average score is 0% LinkedIn Facebook Twitter 0% Restart quiz Send feedback Share on facebook Facebook Share on twitter Twitter Share on whatsapp WhatsApp PrevChemical Engineering Basics Quiz 2 Chemical Engineering Basics Quiz 4Next
