0% 0 Mechanical Engineering Quiz 39 1 / 50 Aeroplanes employ following type of compressor_______________? axial flow combination of above radial flow centrifugal 2 / 50 If E is the duration, ES and EF are die earliest start and finish times, LS and LF are latest start and finish times, then the following relation holds good______________________? EF=ES+D all of the above LS=LF-D LF = LS + D 3 / 50 A circle passing through the pitch point with its center at the center of cam axis is known as___________________? prime circle outer circle pitch circle base circle 4 / 50 A specimen of aluminium metal when observed under microscope shows __________________? H.C.P. structure F.C.D crystal structure a complex cubic structure B.C.crystalline structure 5 / 50 The vapor pressure of refrigerant should be_________________? equal to atmospheric pressure lower than atmospheric pressure higher than atmospheric pressure could be anything 6 / 50 Rivets are made of following type of material_________________? ductile resilient hard tough 7 / 50 The general rule for rating refrigeration systems (excepting for C02 system) is to approximate following h.p. per ton of refrigeration__________________? 0.1 to 0.5 h.p. per ton of refrigeration 2 to 5 h.p. per ton of refrigeration 1 to 2 h.p. per ton of refrigeration 0.5 to 0.8 h.p. per ton of refrigeration 8 / 50 A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to___________________? 25 100 50 250 9 / 50 In S.J. unit, one ton of refrigeration is equal to___________________? 21 kJ/min 210 kJ/min 420 kJ/min 840 kJ/min 10 / 50 Breeder reactor has a conversion ratio of_____________________? zero unity less than unity more than unity 11 / 50 The maximum compression ratio in an actual single stage axial flow comperssor is of the order of________________? 01:01.2 1:10 1:05 1:02 12 / 50 The units of moment of inertia of an area are__________________? kg/m2 m3 m4 kg m2 13 / 50 The salient feature of functional organisation is________________? separation of planning and design part each individual maintains functional efficiency strict adherence to specification all of the above 14 / 50 The units of dynamic or absolute viscosity are__________________? metres2 per sec newton-sec2 per meter newton-sec per meter kg sec/meter 15 / 50 In multi-V-belt transmission, if one of the belt is broken, we have to change the_________________? there is no need of changing any one as remaining belts can take care of transmission of load broken belt and its adjacent belts all the belts broken belt 16 / 50 The time required to complete a job is established and a bonus is paid to the worker based on the exact % of time saved. This type of incentive plan is known as_________________? Halsey Premium Plan Taylor Plan Rowan Plan Dry work Plan 17 / 50 Resilience of a material is important, when it is subjected to________________? combined loading shock loading thermal stresses fatigue 18 / 50 Ratio of indicated H.P. and brake H.P. is known as_________________? adiabatic efficiency volumetric efficiency isothermal efficiency mechanical efficiency 19 / 50 According to Stefan-Boltzmann law, ideal radiators emit radiant energy at a rate proportional to___________________? square of temperature absolute temperature fourth power of absolute temperature fourth power of temperature 20 / 50 Natural uranium is made up of__________________? 99.282% U235, 0.712% U234, 0.006% U238 99.282% U238, 0.712% U235, 0.006% U234 99.282% U234, 0.712% U238, 0.006% U235 99.282% U235, 0.712% U238, 0.06%? U234 21 / 50 A cam with a roller follower would con stitute following type of pair______________? open pair lower pair higher pair close pair 22 / 50 Francis, Kaplan and propeller turbines fall under the category of___________________? Mixed flow turbines Axial flow turbines Impulse turbines Reaction turbines 23 / 50 The process by which a heavy nucleus is splitted into two light nuclei is known as_________________? fusion splitting fission disintegration 24 / 50 The horse power required in above case will be___________________? B.H.P./0.75 0.75 B.H.P. same 1.5 B.H.P. 25 / 50 If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either___________________? at least two of them must meet be all parallel all the above are correct meet in a point 26 / 50 Ductility of a material can be defined as__________________? ability to recover its original form ability to undergo large permanent deformations in tension ability to undergo large permanent deformations in compression all of the above 27 / 50 A tube has the following advantage over pipe_________________? all of the above greater shock absorption lighter and easier to handle smoother inside walls 28 / 50 During polytropic process_________________? work is done all of the above heat transfer takes place across cylinder walls steam may be wet, dry or superheated after expansion 29 / 50 Stress concentration is caused due to_____________________? pitting at?points or areas at which loads on a member are applied all of the above abrupt change of section variation in properties of material from point to point in a member 30 / 50 While steam expands in turbines, theoretically the entropy________________? remains constant increases behaves unpredictably decreases 31 / 50 Product layout is employed for____________________? all of the above batch production continuous production effective utilization of machine 32 / 50 In the Halsey 50-50 plan, the following are rewarded more___________________? past average workers all of the above past poor workers past good workers 33 / 50 The ratio of limiting friction and normal reaction is known as _____________________? coefficient of friction angle of repose angle of friction sliding friction 34 / 50 A hydraulic accumulator normally consists of________________? two cylinders, two rams and a storage device two co-axial rams and two cylinders a cylinder and a ram a cylinder, a piston, storage tank and control valve 35 / 50 Carbon steel is_______________? an alloy of iron and carbon with varying quantities of phosphorus and sulphur extensively used for making cutting tools refined from cast iron made by adding carbon in steel 36 / 50 Ferrite material is____________________? the most fissionable material the material which absorbs neutrons and undergoes spontaneous changes leading to the formation of fissionable material basic raw material for nuclear plants the basic fuel for nuclear paints 37 / 50 Pick up the wrong statement ? large gas turbines employ axial flow compressors axial flow compressors have instability region of operation axial flow compressors are more stable than centrifugal type compressors but not as efficient axial flow compressors have high capacity and efficiency 38 / 50 Brass (alloy of copper and zinc) is an example of__________________? interstitial solid solution intermetallic compounds substitutional solid solution all of the above 39 / 50 Which of the following equations is not in conformity with others______________? organisation performance x motivation = profits attitude x situation = motivation knowledge x skill = ability ability x motivation = performance 40 / 50 The nuclear power plant at Tarapur has the following reactor________________? pressurised water sodium graphite boiling water fast breeder 41 / 50 The connecting rod bolts are tightened up so that tightening stress _________________? is about yield point divided by safety factor is 50% of yield point is just sufficient to hold parts together approaches yield point 42 / 50 Reheating in multistage expansion gas turbine results in____________________? maximum work output reduction in compressor work high thermal efficiency decrease of heat loss in exhaust 43 / 50 Whether any core is required in wire ropes________________? no sometimes rarely yes 44 / 50 The most commonly used moderator in nuclear plants is___________________? graphite graphite and concrete heavy water concrete and bricks 45 / 50 PMTP (predetermined motion time systems) include___________________? WFS (work factor systems) BNTS (basic motion time study) all of the above MTM (method time measurement) 46 / 50 It is required to connect two parallel shafts, the distance between whose axes is small and variable. The shafts are coupled by_______________? flexible coupling Oldham?s coupling knuckle joint universal joint 47 / 50 Minimum work in compressor is possible when the value of adiabatic index n is equal to_________________? 1 0.75 1.35 1.27 48 / 50 The clearance volume of the air compressor is kept minimum because____________________? it results in minimum work it permits isothermal compression it allows maximum compression to be achieved it greatly affects volumetric efficiency 49 / 50 In micromotion study, therblig is described by_______________? an activity standard symbol and colour a symbol an event 50 / 50 The total emissivity power is .defined as the total amount of radiation emitted by a black body per unit_______________? temperature area time thickness Provide Your Information Your score is The average score is 0% LinkedIn Facebook Twitter 0% Restart quiz Send feedback Share on facebook Facebook Share on twitter Twitter Share on whatsapp WhatsApp PrevMechanical Engineering Quiz 38 Mechanical Engineering Quiz 40Next
