0% 1 Mechanical Engineering Quiz 29 1 / 50 The work done per unit mass of air in compression will?be least when n is equal to______________? 1 1.3 1.2 , 1.4 2 / 50 In a _____________ , both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram? compound die combination die progressive die simple die 3 / 50 Constantant an alloy used in thermocouples is an alloy of __________________? copper and tin copper and nickel copper and iron copper and zinc 4 / 50 Which of the following do not have identical dimensions ? Moment of a force and angular momentum Torque and work Momentum and impulse Torque and energy 5 / 50 Ratio of compression is the ratio of__________________? absolute discharge pressure to the ab-solute intake pressure gauge discharge pressure to the gauge intake pressure stroke volume and clearance volume pressures at discharge and suction cor-responding to same temperature 6 / 50 For a product layout the material handling equipment must _________________? be a general purpose type employ conveyor belts, trucks, tractors etc. be designed as special purpose for a particular application have full flexibility 7 / 50 The following types of materials are usually the most ductile__________________? hexagonal close-packed lattice face-centred cubic lattice body-centred cubic lattice all of the above 8 / 50 Which of the following is expected to have highest thermal conductivity_______________? solid ice melting ice water steam 9 / 50 Basic hole is one_________________? whose upper deviation is zero whose lower as well as upper deviations are zero does not exist whose lower deviation is zero 10 / 50 For a floating body to be in stable equilibrium, its metacentre should be___________________? above the center of gravity above the center of buoyancy below the center of buoyancy below the center of gravity 11 / 50 Which of the following refrigerants has lowest freezing point_______________? Freon-12 Freon-22 NH3 C02 12 / 50 The example of rolling pair is________________? ball bearing and roller bearing ball and socket joint bolt and nut lead screw of a lathe 13 / 50 One gram of uranium will produce energy equivalent to approximately____________________? 100 tonnes of high grade coal 1 tonne of high grade coal 10 tonnes of high grade coal 4.5 tonnes of high grade coal 14 / 50 ?Open pairs are those which have__________________? point or line contact between the two elements when in motion elements of pairs not held together mechanically surface contact between the two ele-ments when in motion two elements that permit relative motion 15 / 50 A square surface 3 m x 3 m lies in a vertical line in water pipe its upper edge at water surface. The hydrostatic force on square surface is____________________? 9,000 kg 27,000 kg 13,500 kg 18,000 kg 16 / 50 No liquid can exist as liquid at____________________? ? 273 ?K zero pressure vacuum centre of earth 17 / 50 The change in evaporator temperature in a refrigeration cycle, as compared to change in condenser temperature, influences the value of C.O.P_____________________? less equally. unpredictable more 18 / 50 The biggest size of thermal power unit operating in India is ________________? 100 MW 30 MW 500 MW 60 MW 19 / 50 The basic requirement of a good combustion chamber is___________________? low volumetric efficiency low compression ratio high power output and high thermal efficiency high compression ratio 20 / 50 Bernoulli equation deals with the law of conservation of__________________? mass energy momentum work 21 / 50 An ideal gas as compared to a real gas at very high pressure occupies_________________? more volume same volume unpredictable behaviour less volume 22 / 50 Artificial radioactive isotopes find application in________________? nucleonic devices nuclear fission power generation medical field 23 / 50 Freezing temperature of petrol is usually__________________? less than ? 30?C 10?C 0?C ? 10?C 24 / 50 A fission chain reaction in uranium can be developed by________________? accelerating fast neutrons using moderator slowing down fast neutrons so that Uz fission continues by slow motion neutrons absorbing all neutrons 25 / 50 Uranium-233 is produced__________________? by neutron irradiation of thorium by neutron irradiation of Uz as basic raw material artificially 26 / 50 The conditions for the stable equilibrium of a floating body are___________________? the center of buoyancy and the center of gravity must lie on the same vertical line a righting couple should be formed the meta-center should lie above the center of gravity all the above are correct 27 / 50 All the four operations in two stroke engine are performed in following number of revolutions of crank shaft______________________? One Four Two Half 28 / 50 The bituminous coal is non-caking if its carbon content is_______________? 78-81% 85-90% 81-85% 90-95% 29 / 50 An open vessel of water is accelerated up an inclined plane. The free water surface will__________________? make an angle in opposite direction to inclination of inclined plane any one of above is possible be horizontal make an angle in direction of inclination of inclined plane 30 / 50 The possible loading in various members of framed structures are_________________? all of the above shear or tension buckling or shear compression or tension 31 / 50 Acceptance sampling is widely used in________________? job production all of the above batch production mass production 32 / 50 The Young?s modulus of a wire is defined as the stress which will increase the length of wire compared to its original length________________? one-fourth half same amount double 33 / 50 The stress necessary to initiate yielding is_________________? considerably lesser than that necessary to continue it lesser than that necessary to stop it greater than that necessary to stop it considerably greater than that necessary to continue it 34 / 50 The number of links in pantograph mechanism is equal to______________? 3 4 2 5 35 / 50 Which of the following is not wage incentive plan_________________? Emerson plan Taylor plan differential piece rate system Rowan plan 36 / 50 An important property of high silicon (12 ? 18%) cast iron is the high__________________? tenacity brittleness plasticity hardness 37 / 50 A sample of metal weighs 219 gms in air, 180 gms in water, 120 gms in an unknown fluid. Then which is correct statement about density of metal__________________? metal will float in water metal is twice as dense as unknown fluid metal is twice as dense as water density of metal can?t be determined 38 / 50 The connecting rod bolts are tightened up with initial tension greater than the external load so that___________________? bolts are weakest elements bolts will not loosen during service the resultant load on the bolt would not be affected by the external cyclic load joint may not open up 39 / 50 To obviate axial thrust, following gear drive is used_____________________? double helical gears having opposite teeth mutter gears double helical gears having identical teeth single helical gear in which one of the teeth of helix angle a is more 40 / 50 Universal gas constant is defined as equal to product of the molecular weight of the gas and_______________? specific heat at constant volume gas constant specific heat at constant pressure ratio of two specific heats 41 / 50 The specific gravity of diesel oil Is_________________? 1 0.5 0.85 0.7 42 / 50 Tungsten in steel________________? improves wear resistance, cutting ability and toughness refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties improves cutting ability and reduces hardenability gives ductility, toughness, tensile strength and anticorrosion properties 43 / 50 The unit of energy in S.I. units is________________? watt joule joule/s joule/m 44 / 50 Kinematic pairs are those which have___________________? two elements having Coroili?s com-ponent two elements having relative motion minimum of two instantaneous centres two elements held together mechani-cally 45 / 50 Pick up the correct statement. Dummy activity on a PERT/CPM chart means, it_________________? consumes resources but no time is a dangling event consumes time, but no resources consumes neither time nor resources 46 / 50 Air injection in I.C engines refers to injection of___________________? supercharging air only liquid fuel only liquid fuel and air 47 / 50 The shell diameter and length of locomotive boiler are_______________? 2 m, 4 m 1 m, 4 m 1.5 m, 4 m 1.5 m, 6 m 48 / 50 If the compression ratio of an engine working on Otto cycle is increased from 5 to 7, the %age increase in efficiency will be________________? 8% 4% 14% 2% 49 / 50 A force is completely defined when we specify_______________? magnitude all of the above direction point of application 50 / 50 An actual engine is to be designed having same efficiency as the Carnot cycle. Such a proposition is___________________? impossible feasible possible, but with lot of sophistications possible Provide Your Information Your score is The average score is 70% LinkedIn Facebook Twitter 0% Restart quiz Send feedback Share on facebook Facebook Share on twitter Twitter Share on whatsapp WhatsApp PrevMechanical Engineering Quiz 28 Mechanical Engineering Quiz 30Next
