0% 0 Chemical Engineering Basics Quiz 4 1 / 50 Circular cross section machine parts which are symmetrical about the axis of rotation are made by hot_______? Spinning Extrusion Piercing Drawing 2 / 50 Colour comparator is used to measure the_____? None of these Electrode potential Colour intensity pH value 3 / 50 Current employed in resistance welding ranges from ______ kVA/cm2? 10.5 to 15.5 7.5 to 8.5 4.5 to 6.2 1.2 to 2.5 4 / 50 Compressed dry air is used as the cutting fluid, while machining______? None of these Aluminium Steel Cast iron 5 / 50 Coarse grained steels have______? Very high toughness High density No tendency to distort Low toughness 6 / 50 Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the ___________ method? Sum of the years digit Sinking fund Diminishing balance Multiple straight line 7 / 50 Electrical conductivities of semi-conductors are of the order of _______ ohm/cm ? 15-Oct 1015 3-Oct 103 8 / 50 Cold chisel?s hammers are made of_____? Forged steel High carbon steel Mild steel High speed steel 9 / 50 Corrosion rate cannot be lowered by reducing the _________ of the corroding medium? Concentration None of these Velocity Temperature 10 / 50 Dryness fraction of dry steam is__________? 0.5 0 ? 1 11 / 50 Cobalt ? 60 is used as a source of ______ in medical therapy & industrial radiography? ?-rays ?-rays X-rays ?-rays 12 / 50 Electrometallurgical methods of metal extraction is normally used for those metals_____? Which stands higher in the electrochemical series of the metal Which fall in the category of alkali & alkaline earth metals Whose oxide/ore is not reduced by carbon All A, B. & C. 13 / 50 Common salt is produced from sea water in India generally by the _________ method? Electrolytic None of these Freeze drying Solar evaporation 14 / 50 Desalination of water___________? None of these Makes it non-potable Makes it potable Means distillation of water 15 / 50 Corrosion of metals cannot be prevented by its___________? Alloying Aluminising Chromising Tempering 16 / 50 Coating thickness in case of galvanising of steel sheet generally corresponds to the deposition of ________ gms of zinc per m2 of steel strip ? 1500-3000 120-500 10-May 1000-1500 17 / 50 Damage to metal surface by mechanical action is called______? Pitting Corrosion Erosion None of these 18 / 50 Electrochemical corrosion can occur, only if _________ is present in contact with metal? Gaseous medium Oxygen Liquid medium Air 19 / 50 Copper deposits are found in India at the following location ? Ramagundam Khetri Kolar Kudremukh 20 / 50 Cold heading or upsetting is categorised as the _________ process ? Rolling Bending Extrusion Forging 21 / 50 Consumable electrodes are used in the ______ welding? Arc Thermit Gas Resistance 22 / 50 Cupola produces __________ iron? Wrought Carbon free Cast Pig 23 / 50 Co-efficient of performance of a Carnot cycle refrigerator operating between ? 23?C and + 27?C is _________? 1.5 5 0.5 3 24 / 50 Dislocation cross-slip is difficult in those materials, which have_____? Coarse grain size High work hardening rate Large number of slip systems Low stacking fault energy 25 / 50 Cold working of a material results in increase in hardness, which is termed as the _______ hardening ? Age Cold Work Induction 26 / 50 Diamagnetic materials_____? Are non-magnetic and cannot be magnetised Are magnetised by eddy currents only Are magnetised in direction opposite to the magnetic field Can be magnetised in one direction only 27 / 50 Constituents of stellite are ______? Cobalt, chromium & tungsten Nickel, cobalt & vanadium Zinc, copper & nickel Zinc, aluminium & nickel 28 / 50 During sensible heating of humid air___________? Dry bulb & wet bulb temperature increases Dew point remains constant Relative humidity increases Both B & C 29 / 50 Dephosphorization of molten pig iron is favoured by_________? Oxidising and neutral slag Reducing and basic slag Oxidising and basic slag High activity co-efficient of phosphorous in metal 30 / 50 Cold cracking in the heat affected zone of a high strength steel weld can take place because of the_____? Sufficient hydrogen present in the welding arc Relatively high sulphur content in the base metal Retained austenite Martensite formation 31 / 50 Direct conversion of thermal energy to electrical energy is facilitated by the______? Fuel cells Magneto hydrodynamic generator Photo voltaic cell None of these 32 / 50 Cold chisel & hammers are made of__________? Forged steel High speed steel High carbon steel Mild steel 33 / 50 Dew point temperature always gives an indication of the ___________ of the moist air ? Coolness Moisture content Latent heat Dryness 34 / 50 During sensible cooling of air, its wet bulb temperature ? Increases & the dew point decreases Increases but dew point remains constant Decreases but dew point remains constant Decreases & the dew point increases 35 / 50 During decarburising of a plain carbon steel, the thickness of ferrite layer growth is proportional to______? Square root of time Time Cube of time Square of time 36 / 50 Dies for wire drawing are generally made of___________? Mild steel Carbides High carbon steel Stainless steel 37 / 50 Density in the solid state is slightly less than that in its liquid state, in case of______? None of these Mercury Water Carbon dioxide 38 / 50 Dowtherm is a______? Product of coal tar distillation High temperature heating medium (a petroleum product) None of these Very heat sensitive material 39 / 50 Coating provided on the electrodes used in the arc welding is not expected to__________? Prevent electrode from contamination Provide protective atmosphere to weld Add alloying elements Stabilise the arc 40 / 50 Closeness of packing is maximum in case of ______ crystal lattice? Face centred Body centred Simple cubic None of these 41 / 50 Chlorine acts as a bleaching agent only in the presence of ________? Moisture Sunlight Pure oxygen Dry air 42 / 50 Corrosion is______? An uncontrollable phenomenon Same as erosion A chemical phenomenon A physical phenomenon 43 / 50 Drossing is a _________ operation? Dressing Smelting Dressing Roasting 44 / 50 Difference at any instant between the value of the controlled variable and the set point is called the___________? Differential gap Error ratio Deviation Derivative time 45 / 50 Chromium molybdenum steel cannot be welded using _______ welding ? Thermit Oxy-acetylene Electrical resistance Any of these 46 / 50 Diameter of the rivet to be provided on a 20 mm. thick boiler plate will be _______ mm? 30 20 10 40 47 / 50 Diffusion co-efficient of a metal in a solid solution depends upon its ? Temperature Neither A. nor B. Both A. & B. Composition 48 / 50 Earing is a defect found in steels after the following metal working operation ? Wire drawing Deep drawing Rolling Extrusion 49 / 50 Dislocations are ________ defects? None of these Volume Point Line 50 / 50 Dry saturated steam can be converted into super heated steam by______? Increasing its cross-sectional area of flow Passing it through a pressure reducing valve None of these Forcing it downwards through a vertical tube 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 3 Chemical Engineering Basics Quiz 5Next
