0% 1 Mechanical Engineering Quiz 34 1 / 50 Heating value of fuel used is as on fired basis. If it is reported for dry or moisture free fuel, then latter should be multiplied by the following factor to correct for as fired value ___________________? 1 ? moisture content 1 + moisture content (1- moisture content) (1 + moisture content) 2 / 50 Balls for ball bearings are made of_________________? mild steel stainless steel cast iron carbon-chrome steel 3 / 50 The output of a diesel engine can be increased without increasing the engine revolution or size in following way_________________? supercharging increasing flywheel size feeding more fuel heating incoming air 4 / 50 The power available for take off and climb in case of turbojet engine as compared to reciprocating engine is ___________________? may be less or more depending on ambient conditons same less more 5 / 50 Efficiency of a Carnot engine is given as 80%. If the- cycle direction be reversed, what will be the value of COP of reversed Carnot cycle_________________? 0.8 0.5 0.25 1.25 6 / 50 Lower pairs are those which have___________________? point or line contact between the two elements when in motion surface contact between the two elements when in motion elements of pairs not -held together mechanically two elements that permit relative motion 7 / 50 Ignition timing of a multicylider petrol engine can be adjusted by_________________? adjusting the spark plug gap adjusting ignition coil position rotating the distributor rotating the crank 8 / 50 Temperature of gases at end of compression as compared to exhaust gases in a gas turbine is_________________? equal lower can?t be compared higher 9 / 50 The property of fluid by virtue of which it offers resistance to shear is called________________? adhesion viscosity surface tension cohesion 10 / 50 The unit of length in S.I. units is________________? meter kilometer millimeter centimeter 11 / 50 The major axis of elliptical manholes on the shell should be provided___________________? on dished end anywhere longitudinally circumferentially 12 / 50 A 75 cc engine has following parameter as 75 cc ___________________? fuel tank capacity cylinder volume lub oil capacity swept volume 13 / 50 Which is the false statement about the properties of instantaneous center____________________? at the instantaneous center of rotation, one rigid link rotates instantaneously relative to another for the configuration of mechanism considered the double centre can be denoted either by 02 or Ol2, but proper selection should be made the two rigid links which have no linear velocity relative to each other at this center have the same linear velocity to the third rigid link the two rigid links have no linear velocities relative to each other at the instantaneous centre 14 / 50 All the terms of energy in Bernoulli?s equation have dimension of_______________? mass work length energy 15 / 50 The vapour pressure over the concave surface is______________________? equal to the vapour pressure over the plane surface greater than the vapour pressure over the plane surface zero less man the vapour pressure over the plane surface 16 / 50 Rupture stress is________________? maximum load/original cross-sectional area load at breaking point/A breaking stress load at breaking point/neck area 17 / 50 Addition of copper to aluminium results in_____________________? improvement of corrosion resistance one of the best known age and precipitation-hardening systems improvement of casting characteristics improving machinability 18 / 50 In the equation of virtual work, following force is neglected_______________________? reaction of any smooth surface with which the body is in contact reaction at a point or an axis, fixed in space, around which a body is con-strained to turn reaction of a rough surface of a body which rolls on it without slipping all of the above 19 / 50 The basis for measuring thermodynamic property of temperature is given by___________________? first law of thermodynamics third law of thermodynamics zeroth law of thermodynamics second law of thermodynamics 20 / 50 Rivets are generally specified by_______________? diameter of head nominal diameter thickness of plates to be riveted length of rivet 21 / 50 High specific speed of turbine implies it is__________________? Francis turbine impulse turbine any one of the above propeller turbine 22 / 50 The termal efficiency of a petrol engine at design load is around_________________? 50% 90% 30% 40% 23 / 50 A riveted joint in which the number otrivets decrease from innermost to outer most row is called__________________? chain riveted joint diamond riveted joint criss-cross riveted joint zig-zag riveted joint 24 / 50 Tensile strength of a mild steel specimen can be roughly predicted from following hardness test_________________? Vicker Shore?s sceleroscope Rockwell Brinell 25 / 50 Statistical quality control techniques are based on the theory of___________________? quality probability statistics all of the above 26 / 50 Casting of a centrifugal pump is designed so as to minimize________________? friction loss cavitation static head loss of kinetic energy 27 / 50 The safe twisting moment for a compound shaft is equal to the _________________? mean value maximum calculated value extreme value minimum calculated value 28 / 50 The flow in which conditions do not change with time at any point, is known as_________________? one dimensional flow uniform flow turbulent flow steady flow 29 / 50 Inter cooling in compressors__________________? cools the delivered air enables compression in two stages is the standard practice for big compressors results in saving of power in compressing a given volume to given pressure 30 / 50 The crest diameter of a screw thread is same as _____________________? major diameter minor diameter pitch diameter core diameter 31 / 50 Foundry crucible is made of_________________? german silver mild steel lead graphite 32 / 50 Water contained in a beaker can be made to boil by passing steam through it__________________? at a pressure below the firuosphejric pressure any pressure at atmospheric pressure at a pressure greater than atmospheric pressure 33 / 50 The type of coupling used to join two shafts whose axes are neither in same straight line nor parallel, but intersect is______________________? Oldham?s coupling chain coupling universal coupling flexible coupling 34 / 50 The ultimate analysis of fuel lists _____________________? fuel constituents as percents by volume of moisture, volatile, fixed carbon and ash various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as per-cents by volume various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as per-cents by weight fuel constituents as percents by weight of moisture, volatile, fixed carbon and ash 35 / 50 Enriched uranium is one in which__________________? %age of U has been artificially increased %age of U234 has been artificially in-creased %age of U235 has been artificially in-creased extra energy is pumped from outside 36 / 50 The leaks in a refrigeration system using Freon are detected by____________________? using reagents smelling halide torch which on detection produces greenish flame lighting sulphur sticks which on detection gives white smoke 37 / 50 In the case of compression ignition engine, the %age of CO in exhaust gases is________________? Depends on load 5-10% Considerable percent Zero 38 / 50 Emissivity of a white polished body in comparison to a black body is________________? same depends upon the shape of body lower higher 39 / 50 Which of the following layouts is suited to job production__________________? plant layout product layout fixed position layout process layout 40 / 50 Normal heptane_______________? helps to resist auto-ignition does not affect auto-ignition accelerates auto-ignition has no relation with auto-ighition 41 / 50 For an irreversible gas turbine cycle, the efficiency and work ratio both depend on___________________? minimum cycle temperature alone pressure ratio alone maximum cycle temperature alone both pressure ratio and maximum cycle temperature 42 / 50 The simplex method is the basic method for__________________? linear programming value analysis model analysis operation research 43 / 50 Boyle?s law i.e. pV = constant is applicable to gases under ___________________? all ranges of pressures high range of pressures only small range of pressures steady change of pressures 44 / 50 The work ratio of simple gas turbine cycle depends on_________________? minimum cycle temperature maximum cycle temperature all of the above pressure ratio 45 / 50 The forces, which meet at one point, but their lines of action do not lie in a plane, are called_________________? non-coplanar non-concurrent forces coplanar non-concurrent forces intersecting forces non-coplanar concurrent forces 46 / 50 To transmit power from one rotating shaft to another whose axes are neither parallel nor intersecting, use__________________? bevel gear spiral gear spur gear worm gear 47 / 50 PERT stands for k (fit) project evaluation and review technique__________________? project examination and review technique process execution and reporting technology project evaluation and reporting technique project execution and results technique 48 / 50 The capacity of compressor will be highest when its intake temperature is___________________? anything. atmospheric highest lowest 49 / 50 Isothermal compression though most efficient, but is not -practicable because_________________? compressor has to run at very slow speed to achieve it it does not increase pressure much it is impossible in practice ityrequires very big cylinder 50 / 50 In an ideal machine, the output as compared to input is_______________? less equal may be less or more depending on efficiency more Provide Your Information Your score is The average score is 56% LinkedIn Facebook Twitter 0% Restart quiz Send feedback Share on facebook Facebook Share on twitter Twitter Share on whatsapp WhatsApp PrevMechanical Engineering Quiz 33 Mechanical Engineering Quiz 35Next
