0% 2 Mechanical Engineering Quiz 15 1 / 50 Reversed joule cycle is called_________________? Bell Coleman cycle Rankine cycle Brayton cycle Carnot cycle 2 / 50 Pick up wrong statement about desired properties of a good fuel__________________? ease in storing produce minimum smoke and gases high ignition point high calorific value 3 / 50 A point on a link connecting double slider crank chain traces a____________________? circle straight line parabola ellipse 4 / 50 The energy distribution of an ideal reflector at higher temperatures is largely in the range of ___________________? remains same at all wavelengths shorter wavelength longer wavelength wavelength has nothing to do with it 5 / 50 The technique of value analysis can be applied to____________________? complicated items only crash programmer items only any item simple items only 6 / 50 Fourier?s law of heat conduction is valid for_________________? regular surfaces having non-uniform temperature gradients three dimensional cases only two dimensional cases only one dimensional cases only 7 / 50 The working fluid in ai turbine is___________________? in two phases in a single phase in three phases in the form of air and water mixture 8 / 50 According to fan laws, for fans having constant wheel diameter, the pressure varies________________? square of fan speed directly as fan speed cube of fan speed square root of fan speed 9 / 50 When two springs are in series (having stiffness K), the equivalent stiffness will be________________? 2K K KIA K/2 10 / 50 Corrosion resistance of steel is increased by addition of________________? vanadium, aluminium tungsten, molybdenum, vanadium, chromium chromium and nickel sulphur, phosphorus, lead 11 / 50 Thermal conductivity of water in general with rise in temperature ____________________? increases may increase or decrease depending on temperature decreases remains constant 12 / 50 String diagram is used_________________? where processes require the operator to be moved from one place to another for checking the relative values of various layouts when a group of workers are working at a place all of the above 13 / 50 The maximum frictional force which comes into play when a body just begins to slide over another surface is called________________? rolling friction limiting friction sliding friction kinematic friction 14 / 50 To avoid moisture troubles, the branch connections from compressed air lines should be taken from_________________? right side of main bottom side of main left side of main top side of main 15 / 50 Coefficient of friction is the_________________? angle between normal reaction and the resultant of normal reaction and the limiting friction the friction force acting when the body is just about to move the friction force acting when the body is in motion ratio of limiting friction and normal reaction 16 / 50 The pressure at the end of compression in the case of diesel engine is of the order of___________________? 12kg/cmz 20 kg/cmz 35 kg/cm 6 kg/cm 17 / 50 The main purpose of reheating in gas turbine is to__________________? reduce turbine size increase power output increase temperature increase speed 18 / 50 Ammonia-absorption refrigeration cycle requires__________________? very little work input zero work input nearly same work input as for vapour compression cycle maximum work input 19 / 50 The rated life of a bearing varies___________________? directly as load inversely as square of load inversely as cube of load inversely as fourth power of load 20 / 50 In riveted boiler joints, all stresses, shearing, bearing and tensile are based on the_________________? size of the drilled or reamed hole smaller of the two size of rivet average of size of rivet and hole 21 / 50 A standard ice point temperature corresponds to the temperature of ___________________? mixture of ice and water Under equilibrium conditions ice at ? 4?C solid and dry ice water at 0?C 22 / 50 The specific volume of steam with increase in pressure decreases_____________________? slowly first and then rapidly rapidly first and then slowly inversely linearly 23 / 50 On Mollier chart, flow through turbine is represented by ________________? horizontal straight line straight inclined line curved line vertical straight line 24 / 50 Characteristic gas constant of a gas is equal to______________________? Cp ? Cv Cp + Cv C/Cv Cv/Cp 25 / 50 An ideal air compressor cycle with clearance on p-v diagram can be represented by following processes_______________? two adiabatic and two isobaric two adiabatic, one isobaric and one constant volume, one adiabatic, two isobaric, and one constant volume one adiabatic, one isobaric and two constant volume 26 / 50 According to Rowan plan, if H = hourly rate, A = actual time and S = standard time, then wages will be___________________? HA + ^^-H HA + ^^-H HA HA + (S~A) HA 27 / 50 The evaporation of 15.653 kg of water per hour from and at 100?C is called_________________? one boiler h.p. evaporative capacity factor of evaporation equivalent evaporation 28 / 50 The product of either force of couple with the arm of the couple is called_________________? resultant couple resulting couple moment of the forces moment of the couple 29 / 50 A body floats in stable equilibrium ____________________? when its meatcentric height is zero metacentre has nothing to do with position of e.g. for determining stability when the metancentre is above e.g. when its e.g. is below it?s center of buoyancy 30 / 50 The Scott-Russell mechanism consists of_________________? sliding and rotary pairs sliding pairs only turning and rotary pairs sliding and turning pairs 31 / 50 Muntz metal contains copper and zinc in the ratio of________________? 60:40:00 50:50:00 0.888888889 40 : 60 32 / 50 The alloy used for making electrical resistances and heating elements is____________________? invar nichrome magnin elinvar 33 / 50 Diesel cycle consists of following four processes_________________? two isothermals and two isentropics two isentropics and two constant pressures two isentropics, one constant volume and one constant pressure two isentropics, and two constant volumes. 34 / 50 The Klein?s method of construction for reciprocating engine mechanism _______________? utilises a quadrilateral similar to the diagram of mechanism for reciprocating engine is based on acceleration diagram enables determination of Corioli?s component is a simplified form of instantaneous center method 35 / 50 To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than____________________? 10.0 m above the hydraulic gradient 6.4 m above the hydraulic gradient 5.0 above the hydraulic gradient 2.4 m above the hydraulic gradient 36 / 50 Most high speed compression engines operate on __________________? Special type of air cycle Diesel cycle Dual combustion cycle Otto cycle 37 / 50 In vapor compression cycle, the condition of refrigerant is very wet vapor________________? after passing through the expansion or throttle valve before entering the compressor after passing through the condenser before passing through the condenser 38 / 50 Boiler stays are used to___________________? prevent flat surfaces under pressure from tearing apart provide support for boiler take care of failure in compression take care of failure in shear 39 / 50 A perfect black body is one which_______________? abslprbs heat radiations of all wave lengths falling on it is black in colour transmits all heat radiations reflects all heat 40 / 50 The risk of radioactive hazard is greatest in the turbine with following reactor___________________? gas cooled boiling water pressurised water liquid metal cooled 41 / 50 The property of a fluid which enables it to resist tensile stress is known as___________________? surface tension adhesion compressibility cohesion 42 / 50 The basic difference between PERT and CPM is that_____________? critical path is determined in PERT only costs are considered on CPM only and not in PERT guessed times are used in PERT and evaluated times in CPM PERT deals with events and CPM with activities 43 / 50 A centrifugal compressor works on the principle of__________________? centripetal action conversion of kinetic energy into pres?sure energy conversion of pressure energy into kinetic energy None 44 / 50 Railway rails are normally made of_______________? tungsten steel high carbon mild steel alloy steel 45 / 50 The work ratio of a gas turbine plant is defined as the ratio of__________________? none actual heat drop and isentropic heat drop net work output and heat supplied (6) net work output and work done by tur?bine net work output and isentropic heat drop 46 / 50 Which of the following plants is smallest and lightest for genrating a given amount of power__________________? gas turbine plant petrol engine diesel engine? steam power plant 47 / 50 The safety valve on boiler drum compared to safety valve on super heater is set at ________________? lower/higher depending on steam flow same value lower value higher value 48 / 50 In V-belt drive, belt touches______________? at sides only both at bottom and sides could touch anywhere at bottom 49 / 50 For steel, the ultimate strength in shear as compared to ultimate strength in tension is ___________________? 2-Jan same 3-Jan 3-Feb 50 / 50 Adiabatic compression is one in which___________________? work done is maximum no heat leaves or enters the compressor cylinder during cornpression temperature during compression remains constant temperature rise follows a linear relationship Provide Your Information Your score is The average score is 80% LinkedIn Facebook Twitter 0% Restart quiz Send feedback Share on facebook Facebook Share on twitter Twitter Share on whatsapp WhatsApp PrevMechanical Engineering Quiz 14 Mechanical Engineering Quiz 16Next
