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