0% 4 Mechanical Engineering Quiz 7 1 / 50 The diameter of cylindrical shell of the Lancashire boiler is of the order of__________________? 1 tp 1.25m 1 to 1.75 m 1.75 to 2.75 m 2 to 4 m 2 / 50 The following is the inversion of slider crank chain mechanism______________________? all of the above oscillating cylinder engine hand pump Whitworth quick return mechanism 3 / 50 In nodular iron, graphite is in the form of_____________________? flakes free carbon cementite spheroids 4 / 50 The part load efficiency of a carburettor is,___________________? Poor Constant Optimum Maximum 5 / 50 In standard taper roller bearings, the angle of taper of outer raceway is___________________? 8? 15? 5? 25? 6 / 50 Any point on a link connecting double slider crank chain will trace a ________________? ellipse parabola straight line circle 7 / 50 The ideal efficiency of simple gas turbine cycle depends on________________? all of the above pressure ratio minimum cycle temperature maximum cycle temperature 8 / 50 Plutonium is produced________________? by neutron irradiation of Uz as basic raw material by neutron irradiation of throium artificially 9 / 50 The usual clearance provided in hydrodynamic bearing per mm of diameter of shaft is___________________? 1 micron 0.01 micron 0.1 micron 10 microns 10 / 50 In designing air preheater, the important design consideration is that_________________? handling and maintenance should be easier heat transfer area should be optimum approach temperature should be as low as possible stack gases should not be cooled to the dew point 11 / 50 Which of the following is more appropriate for a moderator. One which_________________? does not absorb neutrons absorbs neutrons accelerates neutrons eats up neutrons 12 / 50 The intensity of stress which causes unit strain is called_______________? modulus of rigidity unit stress bulk modulus modulus of elasticity 13 / 50 An ideal flow of any fluid must fulfill the following____________________? Pascal? law Newton?s law of motion Continuity equation Newton?s law of viscosity 14 / 50 The technique for establishing and maintaining priorities among the various jobs of any project is known as___________________? slotting technique for scheduling short interval scheduling event flow scheduling technique critical ratio scheduling 15 / 50 Vertical lines on pressure-enthalpy chart show constant_______________? total heat lines pressure lines temperature lines entropy lines 16 / 50 When trying to turn a key into a lock, following is applied _____________________? non-coplanar forces couple lever coplanar force 17 / 50 Rotary compressor is best suited for_____________________? large quantity of air at low pressure small quantity of air at high pressure small quantity of air at low pressure large quantity of air at high pressure 18 / 50 The fatigue limit of a material____________________? remains same irrespective of surface conditions is dependent upon yield strength of material is greatly decreased by poor surface conditions depends mainly on core composition 19 / 50 Violent sound pulsations within the cylinder of an IC. engine are caused due to_________________? heavy turbulence improved scavenging detonation heavy supercharging 20 / 50 The maximum temperature in the I. engine cylinder is of the order of ________________? 2000-2500?C 1000- 1500?C 1500-2000?C 500- 1000?C 21 / 50 Basic solution is one which has pH value___________________? greater than 7 equal to 7 pH value has nothing to do with basic solution less than 7 22 / 50 Angle of action of cam is defined as the angle ____________________? of rotation of the cam for a definite displacement of the follower during which the follower returns to its initial position through which the cam rotates during the period in which the follower remains in the highest position moved by the cam from beginning of ascent to the termination of descent 23 / 50 The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is__________________? four times half double same 24 / 50 A slider crank chain consists of following numbers of turning and sliding pairs_________________? 2, 2 4, 0 3, 1 I, 3 25 / 50 When heat is transferred from one particle of hot body to another by actual motion of the heated particles, it is referred to as heat transfer by ___________________? convection conduction and convection radiation conduction 26 / 50 The crystal structure of brass is_________________? H.C.P. Orthorhombic crystalline structure F.C.C. B.C.C. 27 / 50 According to principle of transmissibility of forces, the effect of a force upon a body is_________________? the same at every point in its line of action maximum when it acts at the center of gravity of a body different at different points in its line of action minimum when it acts at the C.G. of the body 28 / 50 The process of diffusion of one liquid into the other through a semi-permeable membrane is called_______________________? surface tension osmosis viscosity cohesion 29 / 50 Austenite rs a combination of_________________? ferrite and cementite ferrite and austenite ferrite and iron graphite cementite and gamma iron 30 / 50 The first method invented for planning projects was________________? critical path method (CPM) bar chart method programme evaluation and review technique (PERT) milestone chart 31 / 50 The strain energy stored in a body due to suddenly applied load compared to when it is applied gradually is____________________? eight times four times twice same 32 / 50 Turbofan engine employs ____________________ ? solid fuel firing one air stream two or more air streams no air stream 33 / 50 Sulphur content of fuels is very important to the plant operators because it____________________? promotes complete combustion has highly corrosive effect retards electric precipitation has high heating value 34 / 50 In open combustion chamber in diesel engines____________________? the shape and layout of the piston crown, the inlet port, and the valve produce the turbulent effect on fuel mixture fuel is injected at atmospheric pres?sure only a part of air charge is contained in an auxiliary chamber in which the fuel starts to burn with insufficient air which due to explosion tendency mixes thoroughly into main cylinder charge fuel is injected into an auxiliary chamber that is separated from the cylinder by an orifice or throat 35 / 50 In accelerated circulation type boiler________________? None water is supplied in drum and through downcomers? located in atmospheric conditon it passes to the water wall and rises to durm in the from of mixture of water and steam heating takes place at bottom and the water supplied at bottom gets converted into the mixture of stdam bubbles and hot water which rise to durm feed pump is employed to supplement natural circulation in water wall type furnace 36 / 50 At low temperatures (say 75?C) the notched-bar impact value of steel____________________? decreases markedly increases markedly remains same depends on heat treatment carried out 37 / 50 In an isothermal process, the internal energy________________? first increases and then decreases increases remains constant decreases 38 / 50 Standard time as compared to normal time is_______________? greater smaller equal there is no such correlation 39 / 50 A single force and a couple acting in the same plane upon a rigid body_________________? are equivalent balance each other cannot balance each other produce moment of a couple 40 / 50 The refrigerant for a refrigerator should have ___________________? high sensible heat high latent heat low latent heat high total heat 41 / 50 The C.G. of a solid hemisphere lies on the central radius 3r________________? at distance ? from the plane base 3r at distance ? from the plane base or at distance ? from the plane base 3r at distance ? from the plane base 3r 42 / 50 Form coefficient of spring is _____________________? its capability of storing energy concerned With strength of wire of spring load required to produce unit deflection ratio of coil diameter to wire diameter 43 / 50 In the opposed piston diesel engine, the combustion chamber is located________________? None between the pistons above the piston (/;) below the piston any when 44 / 50 Depending on the radiating properties, body will be transparent when________________? p = 0, x = 0 and a = 1 X = 0, a + p = 1 p = 0, T= l,anda = 0 p=l,x = 0,anda = 0 45 / 50 The deflection of a cantilever beam under load W is 8. If its width is halved, then the deflection under load W will be________________? 2-Aug 48 4-Aug 28 46 / 50 Belt slip may occur due to________________? driving pulley too small heavy load all of the above loose belt 47 / 50 Which of the following is not the unit of power ? kcal/sec kW (kilowatt) hp (horse power) kcal/kg sec 48 / 50 The term ?value? in value engineering refers to_______________? utility of the product manufactured cost of the product total cost of the product selling price of the product 49 / 50 Boiler H.P. is defined as the ________________ ? work done in evaporating 1 kg of steam per hour from and at 100?C into dry saturated steam work done by 1 kg of steam at saturation condition the evaporation of 15.65 kg of water per hour from and at 100?C into dry saturated steam steam evaporation rate per kg of fuel fired 50 / 50 The ultimate tensile stress of mild steel compared to ultimate compressive stress is__________________? more or less depending on other factors same more less Provide Your Information Your score is The average score is 79% LinkedIn Facebook Twitter 0% Restart quiz Send feedback Share on facebook Facebook Share on twitter Twitter Share on whatsapp WhatsApp PrevMechanical Engineering Quiz 6 Mechanical Engineering Quiz 8Next
