0% 1 Mechanical Engineering Quiz 28 1 / 50 The same volume of all gases would represent their____________________? molecular weights densities specific weights gas characteristic constants 2 / 50 Center of gravity of a solid cone lies on the axis at the height _____________________? one-third of the total height above base one-half of the total height above base three-eighth of the total height above the base one-fourth of the total height above base 3 / 50 One ton refrigeratiqn corresponds to_________________? 80 kcal/min 50 kcal/min 50 kcal/kr 80 kcal/hr 4 / 50 The calorific value of gaseous fuels is expressed in terms of__________________? kcal kcal/kg kcal/m? kcal/m2 5 / 50 A nuclear fission is initiated when the critical energy as compared to neutron binding energy of the atoms is_________________? same less more there is no such criterion 6 / 50 Farad is the unit of___________? capacitance None of these inductance voltage 7 / 50 In cross or regular lay ropes_________________? direction of twist of wires in strands is opposite to the direction of twist of strands direction of twist of wires and strands are same wires are not twisted wires in two adjacent strands are twisted in opposite direction 8 / 50 Mixture of ice and water form a________________________? open system isolated system closed system heterogeneous system 9 / 50 100% efficiency of a thermal cycle cannot be achieved because of __________________? leakage non-availability of ideal substance it is not possible to achieve 0?K temperature frictional losses 10 / 50 If d is the normal diameter of a bolt in mm, then the initial tension in kg in a bolt used for making a fluid tight joint as for steam engine cover joint is calculated by the relation_______________? 168 d 138 d 124 d 102 d 11 / 50 The pressure?of a gas in terms of its mean kinetic energy per unit volume E is equal to________________? 2E/3 3E/4 E/3 E/2 12 / 50 The vapor compression refrigerator employs the following cycle_________________? Rankine Reversed Rankine Carnot Reversed Carnot 13 / 50 Which of the following statements is correct ? All the reversible engines have same efficiency Both Rankine and Caront cycles have same efficiency between same temperature limits All the irreversible engines have same efficiency All reversible engines working between same temperature limits have same-efficiency 14 / 50 The internal reaction in bottom 80 cm length will be________________? different in both cases data are not sufficient to determine same zero in first case same in both cases 15 / 50 For which material the Poisson?s ratio is more than unity_________________? none of the above copper steel aluminium 16 / 50 Bin card is used in__________________? foundry shop administrative wing workshop stores 17 / 50 Caking coals are those which __________________________? show little or no fusing action form lumps or masses of coke burn freely burn completely 18 / 50 With single Hooke?s joint it is possible to connect two shafts, the axes of which have an angular misalignment up to ________________? 10? 40? 20? 30? 19 / 50 During base load operation, the best method of controlling compressor is ___________________? constant speed unloader start-stop motor variable speed relief valve 20 / 50 Cast iron has_________________? its elastic limit close to the ultimate breaking strength high tensile strength all of the above high ductility 21 / 50 The included angle in unified of American National threads is___________________? 47? 55? 60? 29? 22 / 50 Ball bearing type screws are found in following application_____________________? crane steering mechanism screw jack aeroplane engines 23 / 50 In vapor compression cycle, the condition of refrigerant is high pressure saturated liquid________________? before passing through the condenser before entering the expansion valve after passing through the expansion or thiottle valve after passing through the condenser 24 / 50 In a flooded evaporator refrigerator, an accumulator at suction of compressor is used to___________________? superheat the vapour collect liquid refrigerant and prevent it from going to compressor detect liquid in vapour collect vapours 25 / 50 In automobiles the power is transmitted from gear box to differential through _________________? Knuckle joint Hooke?s joint universal joint bevel gear 26 / 50 Flow of water in a pipe about 3 metres in diameter can be measured by__________________? orifice plate venturi pitot tube rotameter 27 / 50 Latent heat of dry steam at atmospneric pressure is equal to____________________? 539 kcal/kg 100 kcal/kg 427 kcal/kg 539 BTU/lb 28 / 50 Brittle coating technique is used for_________________? protecting metal against wear and tear determining brittleness experimental stress analysis protecting metal against corrosion 29 / 50 Basic constituents of Monel metal are _________________? nickel, copper zinc, tin, lead nickel, lead and tin nickel, molybdenum 30 / 50 In the case of petrol engine at maximum output, the percentage of CO in exhaust gases is ____________________? Considerable percent 5-10% Depends on load and quality of fuel Zero 31 / 50 Military organisation is known as_______________________? line organisation functional organisation all of the above line and staff organisation 32 / 50 Stress concentration in static loading is more serious in__________________? ductile materials depends on other factors equally serious in both cases brittle materials 33 / 50 The crystal structure of gamma iron is_________________? body centred cubic cubic structure face centred cubic hexagonal close packed 34 / 50 Heat is closely related with___________________? temperature liquids energy entropy 35 / 50 The locus of a point on a thread unwound from a cylinder will be___________________? cycloidal a straight line a circle involute 36 / 50 Reciprocating air compressor is best suited for___________________? large quantity of air at high pressure small quantity of air at high pressure small quantity of air at low pressure large quantity of air at low pressure 37 / 50 The thermal efficiency of a simple gas turbine for a given turbine inlet temperature with increase in pressure ratio_____________________? increases first decreases and then increases decreases first increases and then decreases 38 / 50 One kg of steam sample contains 0.8 kg dry steam; it?s dryness fraction is__________________? 0.6 0.8 0.2 1 39 / 50 In isochronous governing, speed droop is_______________? 100% 50% 5% 30% 40 / 50 The following type of carburettor is preferred_______________? vertical type eccentric type concentric type horizontal type 41 / 50 A perfect gas at 27?C is heated at constant pressure till its volume is double. The final temperature is________________? 654?C 54?C 327?C 108?C 42 / 50 Cobalt in steel __________________? improves cutting ability and reduce hardenability refines grain size and produces les tendency to carburisation, improve corrosion and heat resistant proper ties improves wear resistance, cuttinability and toughness gives ductility, toughness, tensile strength and anti corrosion property: 43 / 50 Travel charts provide__________________? an approximate estimate of the handling which must be done at a particular station an idea of the flow of materials at various stages a compact estimate of the handling which must be done between various work sections the information for changes required in rearranging material handling equipment 44 / 50 Davis steering gear consists of__________________? turning pairs rolling pairs sliding pairs higher pairs 45 / 50 In a throttling process_________________? internal energy of steam changes heat transfer takes place none of the above work is done by the expanding steam 46 / 50 The m.e.p. of a petrol engine first increases as the fuel air ratio is increased and then decreases on further increase in fuel air ratio. The M.E.P is maximum in the zone of________________? rich mixture unpredictable lean mixture chemically correct mixture 47 / 50 If the opposite links of a four bar linkage are equal, the links will always form a_________________? parallelogram rectangle pentagon triangle 48 / 50 Process of austempering results in__________________? carburised structure martenistic structure formation of bainite structure lamellar layers of carbide distributed throughout the structure 49 / 50 Carnot cycle efficiency depends upon________________? working condition condition of engine temperature range of operation properties of the medium/substance used 50 / 50 The increase in pressure _________________? .does not affect the boiling point of a liquid lowers the boiling point of a liquid reduces its volume raises the boiling point of a liquid Provide Your Information Your score is The average score is 28% LinkedIn Facebook Twitter 0% Restart quiz Send feedback Share on facebook Facebook Share on twitter Twitter Share on whatsapp WhatsApp PrevMechanical Engineering Quiz 27 Mechanical Engineering Quiz 29Next
