0% 1 Mechanical Engineering Quiz 31 1 / 50 Which is the false statement about true stress-strain method______________? It does not exist It is more sensitive to changes in both metallurgical and mechanical conditions It can be correlated with stress-strain values in other tests like torsion, impact, combined stress tests etc. It gives, a more accurate picture of the ductility 2 / 50 Stress relaxation is- the phenomenon ___________________? in which stress remains constant on in-creasing load in which deformation tends to loosen the joint and produces a stress reduced in which parts are not loaded stress reduces on increasing load 3 / 50 In a static fluid ___________________? only normal stresses can exist linear deformation is small resistance to shear stress is small fluid pressure is zero 4 / 50 Angle of friction is the_______________________? angle between normal reaction and the resultant of normal reaction and the limiting friction ratio of limiting friction and normal reaction the ratio of minimum friction force to the friction force acting when the body is just about to move the ratio of minimum friction force to friction force acting when the body is in motion 5 / 50 The most popular firing order in case of four cylinder in-line I.C engine is__________________? 1-2-4-3 1-4-2-3 1-2-3-4 1-3-2-4 6 / 50 When a ship travels in a sea, which of the effect is more dangerous___________________? rolling pitching steering all of the above 7 / 50 Tangential acceleration direction is_________________? opposite to angular velocity perpendicular to angular velocity along the angular velocity may be any one of these 8 / 50 According to Gay-Lussac law for a perfect gas, the absolute pressure of given mass varies directly as____________________? volume, if temperature is kept constant temperature absolute absolute temperature, if volume is kept constant 9 / 50 The transistor is made of___________________? germanium gold copper silver 10 / 50 Which is false statement about annealing. Annealing is done to________________? relieve stresses soften material harden steel slightly improve machining characteristic 11 / 50 A turbine pump is basically a centrifugal pump equipped additionally with_________________? adjustable blades vaned diffusion casing inlet guide blades backward curved blades 12 / 50 02 content in atmospheric air on volume basis is___________________? 40% 23% 21% 30% 13 / 50 The efficiency of a Carnot engine depends on_______________________? temperatures of source and sink design of engine working substance size of engine 14 / 50 An open system is one in which____________________? both energy and mass cross the boundaries of the system mass does not cross boundaries of the system, though energy may do so neither mass nor energy crosses the boundaries of the system mass crosses the boundary but not the energy 15 / 50 Newton?s law of viscosity is a relationship between____________________? shear stress and viscosity pressure, velocity and viscosity shear stress, velocity and viscosity shear stress anctthejiate of angular distortion 16 / 50 Replacement studies are made on the fol-lowing basis_________________? total life average method annual cost method rate of return method any one of the above 17 / 50 A diathermic wall is one which____________________? prevents thermal interaction encourages thermal interaction discourages thermal interaction permits thermal interaction 18 / 50 Water at pressure of 4 kg/cm2 and 160?C temperature when exposed to atmosphere will_________________? boil cool down flash i.e. get converted into steam remain as it was 19 / 50 The time which results in the least possible direct cost of an activity is known as________________? slow time crash time normal time standard time 20 / 50 Axial flow compressor has the following advantage over centrifugal compressor__________________? higher pressure ratio per stage higher average velocities larger air handling ability per unit frontal area aerofoil blades are used 21 / 50 The precess of breaking up or a lipuid into fine droplets by spraying is called___________________? atomisation carburetion ionisation vaporisation 22 / 50 A 4-stroke diesel engine needs about following amount of air_________________? 75 cc per min. per h.p. 7500 cc per min. per h.p. 750 cc per min. per h.p. 75000 cc per min. per h.p. 23 / 50 Which of the following variables controls the physical properties of a perfect gas_________________? pressure all of the above volume temperature 24 / 50 The balanced draft furnace is one using _________________________? forced draft fan and chimney induced draft fan and forced draft fan induced draft fan and chimney any one of the above 25 / 50 Tandem drawing of wires and tubes is necessary because_________________? it is not possible to reduce at one stage annealing is needed between stages surface finish improves after every drawing stage accuracy in dimensions is not possible otherwise 26 / 50 To avoid an interruption in the flow of a syphon, an air vessel is provided__________________? at the inlet at the outlet at the summit ay nay point between inlet and outlet 27 / 50 Which of the following is the primary fuel________________? U238 U Ulii Pu: 28 / 50 Gas turbine blades are given a rake___________________? opposite to the direction of motion of blades equal to zero depending on the velocity in the direction of motion of blades 29 / 50 If a gas is heated against a pressure, keeping the volume constant, then work done will be equal to__________________? zero pressure x volume ? ve #NAME? 30 / 50 A perpetual motion machine is___________________? a hypothetical machine whose opera-tion would violate the laws of thermodynamics a non-thermodynamic machine a hypothetical machine a thermodynamic machine 31 / 50 The hottest point in a gas turbine is______________________? at the tip in the center at the base between ~ to i of the blade height 32 / 50 An ideal flow of any fluid must satisfy __________________? boundary layer theory Pascal law Newton?s law of viscosity continuity equation 33 / 50 The angle of taper on draft tube is greater than 8? greater than 5? less than 8? greater than 15? 34 / 50 Sulphur content in diesel oil should not be more than_________________? 0.01% 1% 10% 5% 35 / 50 In the lever of third order, load W, effort P and fulcrum F are oriented as follows_________________? W, P and F all on one side F between W and P W between P and F P between W and F 36 / 50 Plutonium-239 is produced__________________? by neutron irradiation of thorium artificially by neutron irradiation of IT* as basic raw material 37 / 50 A hot short metal is_________________? brittle when hot ductile at high temperature brittle when cold brittle under all conditions 38 / 50 The total strain energy stored in a body is termed as__________________? modulus of resilience resilience proof resilience toughness 39 / 50 Mining industry usually employs following motive power___________________? diesel engine petrol engine A.C electric motor compressed air 40 / 50 An air compressor may be controlled by____________________? throttle control any one of the above clearance control blow-off control 41 / 50 CPM is the___________________? event oriented technique activity oriented technique target oriented technique time oriented technique 42 / 50 The most practical fuel for a thermo-nuclear reactor, both from econocical and nuclear consideration is____________________? deuterium uranium thorium plutonium 43 / 50 Steady flow occurs when___________________? the direction and magnitude of the velocity at all points are identical the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane the velocity of successive fluid particles, at any point, is the same at successive periods of time the magnitude and direction of the velocity do not change from point to point in the fluid 44 / 50 Does the supply of scavenging air at a density greater than that of atmosphere mean engine is supercharged ? yes no to some extent unpredictable 45 / 50 The diameter of fire tube of Cornish boiler compared to its shell is__________________? one half one third one-fifth two-fifth 46 / 50 A liquid would wet the solid, if adhesion forces as compared to cohesion forces are________________? less at low temperature and more at high temperature more equal less 47 / 50 Material handling and plant location is analysed by________________? Gnatt chart Emerson chart travel chart bin chart 48 / 50 In a forced vortex, the velocity of flow everywhere within the fluid is__________________? non-zero finite minimum maximum zero 49 / 50 The commonly used material for shielding is__________________? lead or concrete graphite or cadmium lead and tin thick galvanised sheets 50 / 50 If a number of forces act simultaneously on a particle, it is possible _____________________? to replace them by a single force to replace them by a single force through C.G. not a replace them by a single force to replace them by a couple Provide Your Information Your score is The average score is 74% LinkedIn Facebook Twitter 0% Restart quiz Send feedback Share on facebook Facebook Share on twitter Twitter Share on whatsapp WhatsApp PrevMechanical Engineering Quiz 30 Mechanical Engineering Quiz 32Next
