0% 0 Chemical Engineering Basics Quiz 2 1 / 50 A material being tested for endurance strength is subjected to the ________ load ? Dynamic Impact Static & dynamic Completely reversed 2 / 50 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_______? 3CaO. SiO2 5CaO. 3 Al2O3 3CaO. Al2O3 2CaO. SiO2 3 / 50 A fluid is termed as the Newtonian fluid, when the shear stress is __________ the velocity gradient ? Directly proportional to Inversely proportional to None of these Independent of 4 / 50 A fire tube boiler is limited to a maximum steam pressure of about _______ kg/cm2 ? 18 38 52 6 5 / 50 All the atoms of the world comprise of electrons, proton & neutron except that of _______ atom in which neutron is absent ? Helium Hydrogen Neon Deuterium 6 / 50 A furnace is made of a refractory brick wall of thickness 0.5 metre and thermal conductivity 0.7 W/m.?K For the same temperature drop and heat loss, this refractory wall can be replaced by a layer of diatomaceous earth of thermal conductivity 0.14 W/m.K and thickness _______ metre? 0.25 0.01 0.5 0.1 7 / 50 A pycnometer is used for the measurement of__________? Flow rate of molten metal Composition of alloys Specific gravity of a liquid Concentration of a solution 8 / 50 A compact estimate about the amount of materials handling between various work stations is obtained from the_______? Travel chart Gantt chart Bin chart String diagram 9 / 50 A jig is used while ___________ a hole? Enlarging Drilling Counter boring Boring 10 / 50 Alcohols are not suitable as diesel engine fuel because the cetane number of alcohols is______? Zero None of these Very low which prevents their ignition by compression Very high which prevents their ignition by compression 11 / 50 Addition of ________ to steel does not help in improving its machinability ? Silicon Lead Phosphorous Sulphur 12 / 50 A material is capable of resisting softening at high temperature, because of its property termed as______? Hot temper Creep Hot hardness Fatigue 13 / 50 Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid will cease to exist as liquid at_________? Earth?s centre 0?K High vacuum Zero pressure 14 / 50 A steam pipe is intended to be insulated with two layers of insulating materials of different thermal conductivities. For minimum heat transfer to take place__________? The better insulating material should be put outside Steam temperature is considered before deciding as to which insulating material is to be put inside (i.e., just next to the pipe) The better insulation material should be put just next to pipe (i.e., inside) Either of the insulating material could be put on either side 15 / 50 A metal having a Poisson?s ratio = 0.3 is elastically deformed under uniaxial tension. If the longitudinal strain = 0.8, then the magnitude of thickness strain is_________? 0.8 -0.24 0.08 -0.8 16 / 50 A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalent bonds resulting in ________ electrons ? Lack of free None of these Excess of Decrease in 17 / 50 A cylindrical rod subjected to a tensile strain within the elastic limit undergoes a volume change. If the volume strain is equal to half the tensile strain, then the Poisson?s ratio of the rod is_____? 0.25 0.44 0.33 0 18 / 50 Ammonia leakage in the refrigeration system is detected by__________? Its smell Sulphur stick, which on detection gives white smoke Soap solution Using chemical reagents 19 / 50 All of the following alloying elements of steel increases hardness but sacrifice ductility, except_________? Nickel Chromium Vanadium Molybdenum 20 / 50 A gas which is collected over water becomes moistened due to water vapor, exerts its own partial pressure at the gas temperature, which is termed as its________? Vapor pressure Aqueous tension Saturated humidity Absolute humidity 21 / 50 Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with be_________? 18.5 : 1 12.5 : 1 9.5 : 1 15.5 : 1 22 / 50 Absolute zero pressure can be attained at a temperature of_____? None of these 50?K 0?C 0?R 23 / 50 Addition of ______ to steel does not help in improving its machinability? Sulphur Lead Silicon Phosphorous 24 / 50 Aluminium is extracted from______? Bauxite Galena Chalcocite None of these 25 / 50 A reduction in thermal resistance during heat transfer does not occur in the_____? None of these Convection heat transfer by stirring the fluid and cleaning the heating surface Conduction heat transfer by reduction in the material thickness and increase in the thermal conductivity Radiation heat transfer by increasing the temperature and reducing the emissivity 26 / 50 A solar cell converts the sunlight directly into _______ energy? Mechanical Chemical Electrical Thermal 27 / 50 According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear stress is equal to ________ times the yield stress ? ?2 0.5 2 ?3/2 28 / 50 Alloys having more than 80% copper are generally more________? Machinable Prone to season cracking Abrasion resistant Corrosion resistant 29 / 50 According to thermodynamic Fahrenheit scale, the fundamental interval between ice point to steam point is___________? 273? 212? 32? 180? 30 / 50 A material in which the atoms are arranged regularly in some directions but not in others, is termed as ?mesomorphous material?; an example of which is__________? Silver Lead Mica Glass 31 / 50 A solid aluminium ball, when quenched in a water bath maintained at 40?C, cools down from 550?C to 450?C in 20 seconds. The expected temperature of the ball after next 20 seconds may be about ______ ?C? 320 370 300 340 32 / 50 Alloying elements present in Haynes stellite, which has superior performance than high speed steel, are______? Tungsten, chromium & cobalt Tungsten, molybdenum & nickel Nickel, cobalt & chromium Manganese, chromium & cobalt 33 / 50 Age hardening is connected with_________? Duralumin Babbitt metal Stainless steel Gun metal 34 / 50 Ammonia gas can be dried by_____? Quick lime CaCl2 Concentrated H2SO4 PCl5 35 / 50 A dummy activity is used in PERT network to describe the_______? Necessary time delay Resource restriction Precedence relationship Resource idleness 36 / 50 Adhesives___________? None of these Can?t be used in the form of pressure sensitive tapes Cure instantaneously after application on a surface Can?t join two dissimilar metals 37 / 50 Air standard Otto cycle is more efficient than the diesel cycle for the same___________? Compression ratio & pressure Heat addition & pressure Heat addition & compression ratio Cylinder dimension & rpm 38 / 50 Air-petrol ratio in an automotive petrol engine is around _________? 25:01:00 4:01 22:01 14:01 39 / 50 Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about ______? 29:01:00 23:01 9:01 17:01 40 / 50 A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material ? Steel Rubber Brass Glass 41 / 50 A spring material should have low___________? Deflection value Fatigue resistance None of these Elastic limit 42 / 50 A high pressure boiler generates steam at a pressure greater than _______ kg/cm2 ? 50 30 10 80 43 / 50 Addition of _______ to steel does not impart hardness? Silicon Chromium Nickel Copper 44 / 50 A material being tested for endurance strength is subjected to the ______ load? Dynamic Static & dynamic Impact Completely reversed 45 / 50 Alloy powder manufactured by the following process have spherical shapes ? Electrochemical deposition Atomisation Gaseous reduction Mechanical attrition 46 / 50 A particle is settling in a liquid under Stokesian conditions. The free falling velocity of the particle is proportional to______? Particle diameter (Particle diameter)2 (Particle diameter)3 ?(Particle diameter) 47 / 50 A material subjected _________ must have high resilience? Tension Fatigue Vibration Shock loading 48 / 50 A dense structure of grinding wheel is not used for the_______? Ductile material Hard materials Brittle materials Finishing cuts 49 / 50 A jet engine turbine blade is normally manufactured by______? Forging Pressure die casting Shell moulding Investment casting 50 / 50 A form of stress corrosion failure termed as ?season cracking? is generally observed in ___________? Thermosetting polymers Brasses Borosilicate glasses High carbon steels 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 1 Chemical Engineering Basics Quiz 3Next
