0% 4 Mechanical Engineering Quiz 6 1 / 50 Center of pressure on an inclined plane is___________________? at the centroid at metacentre below the centroid above the centroid 2 / 50 An ideal air compressor cycle without clearance on p-v diagram can be represented by following processes________________? two adiabatic and two isobaric one adiabatic, one isobaric and two constant volume one adiabatic, two isobaric, and one constant volume two adiabatic, one isobaric and one constant volume 3 / 50 Heat is transferred by all three modes of transfer, viz, conduction, convection and radiation in _________________? boiler steam condenser electric heater melting of ice 4 / 50 Isochoric process is one in which___________________? free expansion takes place very little mechanical work is done by the system all parameters remain constant no mechanical work is done by the system 5 / 50 The behaviour of gases can be fully determined by___________________? 4 laws 3 laws 1 law 2 laws 6 / 50 Unit of thermal diffusivity is_________________? m2/hr?C m2/hr kcal/m.hr?C kcal/m2 hr 7 / 50 Fusible plug for boilers is made of fusible metal containing tin, lead, and___________________? copper aluminium nickel bismuth 8 / 50 For fluctuating loads, welsuited bearing is_________________? needle roller bearing thrust bearing ball bearing roller bearing 9 / 50 The compression ratio of motor cars is___________________? 13 10 5 7 10 / 50 The value of shear stress which is induced in the shaft due to the applied couple varies____________________? from maximum at the center to mini-mum at the cricumference from minimum at the centro to maxi-mum at the circumference from maximum at the center to zero at the circumference from zero at the center to maximum at the circumference 11 / 50 Nodular iron has____________________? low melting point high maehinability high tensile strength all of the above 12 / 50 Out of the following, from where you will prefer to take intake for air compressor_________________? from an air conditioned room maintained at 20?C from outside atmosphere at 1?C from a side where cooling tower is located nearby from coal yard side 13 / 50 The pressure at which latent heat of vaporisation of water is zero, is_________________? below atmospheric pressure 1 kg/cm2 100 kg/cm2 225.6 kg/cm2 14 / 50 The domestic refrigerator uses following type of compressor ____________________? miniature sealed unit centrifugal axial piston type reciprocating 15 / 50 The amount of heat flow through a body by conduction is_______________? all of the above directly proportional to the surface area of the body directly proportional to the temperature difference on the two faces of the body dependent upon the material of the body 16 / 50 The diameter of internal flue tubes in a Lancashire boiler compared to its shell is_________________? one-fourth two-fifth one-third one-half 17 / 50 In mottled cast iron, carbon is available in__________________? partly in free and partly in combined state combined form free form nodular form 18 / 50 Inventory management consists of__________________? state of merchandise methods of stroing and maintenance etc stock control system effective running of stores all of the above 19 / 50 If a gas vapour is allowed to expand through a very minute aperture, then such a process is known as__________________? throttling free expansion hyperbolic expansion adiabatic expansion 20 / 50 The air entry velocity m a rocket as compared to aircraft is_________________? more less same zero 21 / 50 According to fan laws, for the fans having constant wheel diameters, the power demand varies_______________? square of fan speed directly as fan speed cube of fan speed square root of fan speed 22 / 50 I kgf/cm2 is equal to________________? 760 mm Hg 1 mm Hg zero mm Hg 735.6 mm Hg 23 / 50 Which of the following engines can work on very lean mixture__________________? C.I. engine S.I. engine four stroke engine two stroke engine 24 / 50 In jet engines the products of combustion after passing through the gas lurbine are discharged into_______________? atmosphere back to the compressor discharge nozzle vacuum 25 / 50 Taps, dies and drills contain carbon________________? below 1% above 2.2% below 0.5% above 1% 26 / 50 Volumetric efficiency of air compressors is of the order of________________? 60-70% 20-30% 40-50% 70-90% 27 / 50 The process layout is best suited where______________? machines are arranged according to sequence of operation mass production is envisaged few number of non-standardised units are to be produced specialisation exists 28 / 50 Ethyl fluid is used_______________________? to increase the octane rating of the fuel as a defrosting agent as a superior type of fluid compared to others to increase the cetane rating of the fuel 29 / 50 Which of the following is the property of a system___________________? internal energy pressure and temperature all of the above volume and density 30 / 50 Routing is essential in the following type of industry_________________? process industry mass production industry assembly industry job order industry 31 / 50 The unit of power in S.I. units is______________? kilogram meter/sec watt newton meter joule 32 / 50 Percentage reduction of area in performing tensile test on cast iron may be of the order of__________________? 50% 0% 25% 15% 33 / 50 From a circular plate of diameter 6 cm is cut out a circle whose diameter is a radius of the plate. Find the e.g. of the remainder from the center of circular plate____________________? 1.0 cm 2.5 cm 1.5 cm 0.5 cm 34 / 50 Axial flow compressor resembles____________________ ? centrifugal pump reciprocating pump sliding vane compressor turbine 35 / 50 Highest temperature encountered in refrigeration cycle should be________________? above critical temperature near critical temperature of refrigerant None much below critical temperature 36 / 50 In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The distance between fixed pivots of crank and followers is________________________? slightly more than 95 mm 95 mm 45 mm slightly less than 95 mm 37 / 50 Pick up the wrong statement ? centrifugal compressors have a wider stable operating range than axial flow compressors centrifugal compressors deliver prac-tically constant pressure over a considerable range of capacities Axial flow compressors have a sub-stantially constant delivery at variable pressures axial flow compressors are bigger in diameter compared to centrifugal type 38 / 50 A fast breeder reactor__________________? uses graphite rods as moderator has no moderator uses ferrite material as moderator has powerful moderator 39 / 50 Sense of tangential acceleration of a link_________________? is perpendicular to that of velocity could be either same or opposite to velocity is opposite to that of velocity is same as that of velocity 40 / 50 Automobile steering gear is an example of____________________? lower pair turning pair sliding pair higher pair 41 / 50 The cam shaft of a four stroke I. engine running at 1500 rmp will run at __________________? 750 rpm any value independent of engine speed 3000 rpm 1500 rpm 42 / 50 Which of the following pipes is least corrosion resistant__________________? wrought iron brass mild steel cast iron 43 / 50 The artificial activity; which indicates that an activity following it cannot be started unless, the preceding activity is complete, is known as_________________? event dummy artificial free float 44 / 50 The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will__________________? decrease increase may increase or decrease depending on the type of refrigerant used remain unaffected 45 / 50 Diesel engine can work on very lean air fuel ratio of the order of 30 : 1. A petrol engine can also work on such a lean ratio provided__________________? it is properly designed can not work as it is impossible best quality fuel is used flywheel size is proper 46 / 50 Center of gravity of a thin hollow cone lies on the axis at a height of ___________________? one-half of the total height above base one-fourth of the total height above base one-third of the total height above base three-eighth of the total height above the base 47 / 50 In a compressor, free air delivered is the actual volume delivered at the stated pressure reduced to ____________________? intake temperature and pressure conditions 0?C and 1 kg/cm2 20?C and 1 kg/cm2 N.T.P. conditions 48 / 50 Motion study involves analysis of________________? actions of operator all of the above tooling and equipment layout of work place 49 / 50 The specific fuel consumption for a petrol engine first decreases with increase in fuel air ratio and then increases with further increase in fuel air ratio. The minimum value occurs in the range of__________________? lean mixture rich mixture unpredictable chemically correct mixture 50 / 50 Two coplanar couples having equal and opposite moments_________________? are equivalent produce a couple and an unbalanced force balance each other can not balance each other Provide Your Information Your score is The average score is 66% LinkedIn Facebook Twitter 0% Restart quiz Send feedback Share on facebook Facebook Share on twitter Twitter Share on whatsapp WhatsApp PrevMechanical Engineering Quiz 5 Mechanical Engineering Quiz 7Next
