0% 1 Mechanical Engineering Quiz 20 1 / 50 Log mean temperature difference in case of counter flow compared to parallel flow will be________________? same less depends on other factors more 2 / 50 The weight of a body is due to ___________________? gravitational pull exerted by the earth forces experienced by body in atmosphere centripetal force of earth gravitational force of attraction towards the center of the earth 3 / 50 The property of a material by virtue of which it can be beaten or rolled into plates is called _________________? elasticity ductility malleability plasticity 4 / 50 In a prismatic member made of two materials so joined that they deform equally under axial stress, the unit stresses in two materials are ? equal proportional to their respective moduli of elasticity inversely proportional to their moduli of elasticity average of the sum of moduli of elas-ticity 5 / 50 In which of the following boilers, the draught in furnace is increased by utilising exhaust steam from engine__________________? lancashire boiler babcock and wilcox boiler locomotive boiler cochran boiler 6 / 50 For a two stage compressor* if index of compression for higher stage is greater than index of compression for lower stage, then the optimum pressure as compared to ideal case will___________________? remain unaffected increase decrease other factors control it 7 / 50 Ackermann steering gear consists of_______________? sliding pairs turning pairs rolling pairs higher pairs 8 / 50 The following cycle is used for air craft refrigeration___________________? Brayton cycle Joule cycle Reversed-Brayton cycle Carnot cycle 9 / 50 The C.G. of a right circular solid cone of height h lies at the following distance from the base________________? h/2 J/3 h/4 h/6 10 / 50 The theoretically correct air fuel ratio for petrol engine is of the order of___________________? 9:01 12:01 6:01 15:01 11 / 50 For ship vessel industry the following layout is best suited_________________? plant layout process layout fixed position layout product layout 12 / 50 On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process ________________? involves no change in volume takes place at constant pressure takes place at constant temperature takes place at constant entropy 13 / 50 Heat and work are ____________________? system properties intensive properties path functions point functions 14 / 50 The ratio of heat flow Q1/Q2 from two walls of same thickness having their thermal conductivities as ATj ? 2K2 will be ________________? 0.5 2 0.25 I 15 / 50 A perfect gas____________________? has constant viscosity is in compressible none of the above has zero viscosity 16 / 50 Hydraulic accumulator is used for____________________? generally high pressures to operate hydraulic machines accumulating oil supplying large quantities of oil for very short duration supplying energy when main supply fails 17 / 50 Which of the following layouts is suited for mass production_________________? fixed position layout product layout process layout plant layout 18 / 50 Air refrigeration operates on_____________________? Carnot cycle Brayton cycle Rankine cycle Reversed Carnot cycle 19 / 50 A thin mild steel wire is loaded by adding loads in equal increments till it breaks. The extensions noted with increasing loads will behave as under_________________? increase uniformly first increase and then decrease uniform throughout increase uniformly first and then increase rapidly 20 / 50 The grouping of activities into organisational units is called_________________? departmentatidn higher level management corporate plans functional authority 21 / 50 Which law states that the specific heat of a gas remains constant at all temperatures and pressures______________________? Boyle?s Law Regnault?s Law Charles? Law Joule?s Law 22 / 50 Kinematic pairs are those which have__________________? point or line contact between the two elements when in motion surface contact between the two ele-ments when in motion two elements that permit relative mo-tion elements of pairs not held together mechanically 23 / 50 In a typical medium speed 4-stroke cycle diesel engine________________? compression starts at bottom dead center and ends at top dead center compression starts at 10? before bottom dead center and, ends just before top dead center may start and end anywhere compression starts at 35? after bottom dead center and ends at top dead center 24 / 50 If a system after undergoing a series of processes, returns to the initial state then__________________? process is executed in closed system cycle sum of heat and work transfer will be zero process is thermodynamically in equilibrium its entropy will change due to irreversibility 25 / 50 Compression ratio of LD engines is ___________________? volume displaced by piston per stroke and clearance volume in cylinder ratio of pressure after compression and before compression the ratio of volumes of air in cylinder before compression stroke and after compression stroke swept volume/cylinder volume 26 / 50 An engine has a normal speed of 960 r.p.m. and no load speed of 1000 r.p.m. The speed droop of governor will be about___________________? 2% 4% 8% ?4% 27 / 50 Micromotion study is__________________? subdivision of an operation into therbligs and their analysis minute and detailed motion study analysis of one stage of motion study enlarged view of motion study 28 / 50 Klein?s construction can be used to determine acceleration of various parts when the crank is at_________________? all of the above right angles to the link of the stroke outer dead centre inner dead centre 29 / 50 The most important objective behind plant layout is_____________________? to provide conveniently located shops economy in space overall simplification, safety of integration maximum travel time in plant 30 / 50 Hot air standard diesel cycle efficiency with increase in value of C?_______________? remains unaffected increases decreases depends on other factors 31 / 50 The normal stress in a fluid will be constant in all directions at a point only if__________________________? it has uniform viscosity it is incompressible it has zero viscosity it is at rest 32 / 50 The maximum discharge through a chimney occurs when the height of chimney is_____________________? outside temperature is very low around 200 meters equal to the height of the hot gas column producing draught infinitely long 33 / 50 White metal contains__________________? 88% copper and 10% tin and rest zinc alloy of tin, lead and cadmium silver and chromium 63 to 67% nickel and 30% copper 34 / 50 The unit of mass in S.I. units is ____________________? gram kilogram quintal tonne 35 / 50 Templates are used for_________________? flow of material copying complicated profiles a planning layout advancing a programme in automatic machines 36 / 50 Father of industrial engineering is_________________? Newton Taylor Gnatt Jeck Gilberth 37 / 50 The first law of thermodynamics is the law of_________________? conservation of mass conservation of energy conservation of momentum conservation of heat 38 / 50 Aircraft body is usually fabricated by_________________? welding casting precasting rivetting 39 / 50 A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is _________________? 0.6 0.83 0.3 0.4 40 / 50 The C.G. of a right circular solid cone of height h lies at the following distance from the base______________? J/3 h/2 h/6 h/4 41 / 50 Temperature of steam at around 540?C can be measured by ____________________? thermocouple thermometer thermistor radiatiouv pyrometer 42 / 50 Cylindrical cams can be classified as_________________? none of the above reciprocating tangent circular 43 / 50 Medium specific speed of a pump implies it is_________________? mixed flow pump any one of the above axial flow pump centrifugal pump 44 / 50 Which of the following plans motivates supervisors by paying a premium on time saved by workers_________________? Halsey plan Haynes plan Rowan plan Emerson?s plan 45 / 50 Pick up the correct statement? thrust in turbo-jet is produced by nozzle exit gases air-fuel ratio in a gas turbine is 100 : 1 closed cycle gas turbine is an I.C engine gas turbine uses same working fluid over and over again 46 / 50 Gases have___________________? no value of specific heat only one value of specific heat three values of specific heat two values of specific heat 47 / 50 In ordetjo obtain superheated steam, a superheater is added in an existing boiler. As as result, furnace vacuum will _________________? improve worsen remain unaffected may improve/worsen depending on size unpredictable 48 / 50 The fluid forces considered in the Navier Stokes equation are__________________? gravity, pressure and viscous gravity, viscous and turbulent gravity, pressure and turbulent pressure, viscous and turbulent 49 / 50 In centrifugal pumps, maximum efficiency is obtained when the blades are_________________? straight radial bent forward bent backward 50 / 50 Ram-jet engine__________________? is not self-operating at zero^flight speed is self-operating at zero flight speed produces a jet consisting of plasma requires no air for its operation Provide Your Information Your score is The average score is 56% LinkedIn Facebook Twitter 0% Restart quiz Send feedback Share on facebook Facebook Share on twitter Twitter Share on whatsapp WhatsApp PrevMechanical Engineering Quiz 19 Mechanical Engineering Quiz 21Next
