0% 6 Mechanical Engineering Quiz 3 1 / 50 In the Halsey system of wage incentive plan, a worker is ________________? ensured of minimum wages never a loser not paid any bonus till his efficiency paid as per efficiency 2 / 50 The value of Poisson?s ratio for steel is between_________________? 0.23 to 0.27 0.4 to 0.6 0.01 to 0.1 0.25 to 0.33 3 / 50 A one dimensional flow is one which_________________? is uniform flow takes place in straight lines is steady uniform flow involves zero transverse component of flow 4 / 50 Strain is defined as the ratio of__________________? any one of the above change in length to original length change in volume to original volume change in cross-sectional area to original cross-sectional area 5 / 50 In oilness bearings________________? the oil film is maintained by supplying oil under pressure grease required to be applied after some intervals the oil film pressure is generated only by the rotation of the journal do not require external supply of lubricant 6 / 50 The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at the centriod, if___________________? all of the above the area is inclined the area is vertical the area is horizontal 7 / 50 Which of the following is not the correct method of increasing fatigue limit __________________? cold working shot peening surface decarburisation nitriding of surface 8 / 50 Acidic solution is one which has pH value__________________? less than 7 greater than 7 equal to 7 pH value has nothing to do with neutral solution 9 / 50 Equivalent evaporation is the amount of water evaporated in a boiler from and at ____________________? saturation temperature at given pressure 100?C 0?C room temperature 10 / 50 If a refractory contains high content of silicon, it means refractory is__________________? neutral basic brittle acidic 11 / 50 Break-even analysis can be used for__________________? there is no such criterion average of above two run analysis long run analysis short run analysis 12 / 50 Which of the following elements does not impart hardness to steel__________________? chromium nickel copper silicon 13 / 50 Air-fuel ratio in a jet engine will be of the order of__________________? 20:01 60:01:00 10:01 15:01 14 / 50 Rankine?s theory of failure is applicable for following type of materials___________________? ductile plastic elastic brittle 15 / 50 The ratio of the increase in pressure in rotor blades to total increase in pressure in the stage is called__________________? pressure coefficient slip factor degree of reaction pressure ratio 16 / 50 Each fission of U235 produces following number of fast neutrons per fission________________? 1 neutron 1 ? neutrons 1 ? 2 neutrons 2 ? neutrons 17 / 50 Angle of dwell of cam is defined as the angle________________? moved by the cam from the instant the follower begins to rise, till it reaches its highest position during which the follower returns to its initial position of rotation of the cam for definite dis?placement of the follower through which the cam rotates during the period in which the follower remains in the highest position 18 / 50 Operation of McLeod gauge used for low pressure measurement is based on the principle of_________________? Pascal?s law gas law Boyle?s law Charle?s law 19 / 50 For starting an axial flow pump, its delivery valve should be____________________? could be either open or closed closed open depends on starting condition and flow desired 20 / 50 Metals are good conductors of heat because________________? they contain free electrons their atoms collide frequently their atoms-are relatively far apart they have high density 21 / 50 Works cost implies________________? factory cost primary cost primary cost + factory expenses factory expenses 22 / 50 Micromotion study involves following number of fundamental hand motions_______________? 20 16 12 8 23 / 50 Flexible coupling is used because _____________________? it is easy to engage and disengage it is easy to disassemble it prevents shock transmission and eliminates stress reversals it transmits shocks gradually 24 / 50 Iron is ____________________? paramagnetic ferroelectric ferromagnetic dielectric 25 / 50 Pipes for bicycle frames are made of___________________? hot rolled steel forged steel cold rolled steel cast steel 26 / 50 According to fan laws, for fans having constant wheel diameter, the air or gas capacity varies______________________? directly as fan speed square of fan speed cube of fan speed square root of fan speed 27 / 50 Hart mechanism has________________? four links eight links twelve links six links 28 / 50 An important characteristic of absorption system of refrigeration is__________________? quiet operation cooling below 0?C very little power consumption noisy operation 29 / 50 A boiler shell 200 cm diameter and plate thickness 1.5 cm is subjected to internal pressure of 1.5 MN/m , then the hoop stress will be_________________? 100 MN/m2 200 MN/m2 30 MN/m2 50 MN/m2 30 / 50 The correct sequence for descending order of machinability is _____________________? wrought iron, grey cast iron, low carbon steel grey cast iron, low carbon steel, wrought iron wrought iron,low carbon steel, grey cast iron low carbon steel, grey cast iron, wrought iron 31 / 50 The efficiency of Diesei cycle with decrease in cut off_________________? decreases first increases and then decreases increases remains unaffected 32 / 50 If a material fails below its yield point, failure would be due to___________________? creep sudden loading fatigue straining 33 / 50 The fast breeder reactor uses the following moderator__________________? no moderator is used demineralised water heavy water carbon dioxide 34 / 50 Idler pulley is used___________________? for increasing -velocity ratio for applying tension for changing the direction of motion of the belt all of the above 35 / 50 The ultimate tensile strength and yield strength of most of the metals, when temperature falls from 0 to l00?C will _________________? first increase and then decrease increase decrease remain same 36 / 50 The theoretically correct mixture of air and petrol is approximately ________________? 0.500694444 0.334027778 0.625694444 0.834027778 37 / 50 The critical pressure at which latent heat of vaporisation is zero is________________? 1 kgf/cm2 100 kgf/cm2 225.65 kgf/cm2 273 kgf/cm2 38 / 50 The bulk modulus of elasticity___________________? is large when fluid is more compressible increases with pressure has the dimensions of 1/pressure is independent of pressure and viscosity 39 / 50 LMTD in case of counter flow heat exchanger as compared-to parallel flow heat exchanger is _________________? depends on the area of heat exchanger higher same lower 40 / 50 Modulus of rigidity is defined as the ratio of_________________? longitudinal stress and longitudinal strain lateral stress and lateral strain volumetric stress and volumetric strain shear stress and shear strain 41 / 50 The e.g. of a link in any mechanism would experience_________________? both angular and linear accelerations linear acceleration no acceleration angular acceleration 42 / 50 Gusset stays in a boiler are provided to____________________? prevent the bulging of flat surfaces prevent leakage of hot flue gases support furnace freely from top avoid explosion in furnace 43 / 50 In vapour compression cycle, the conditii of refrigerant is saturated liquid________________? before entering the expansion valve after passing through the expansion throttle valve after passing through the condenser before passing through the condensei 44 / 50 Which of the following is not the intensive property___________________? temperature heat density pressure 45 / 50 For manometer, a better liquid combination is one having ___________________? lower surface tension higher surface tension high density and viscosity surface tension is no criterion 46 / 50 Coulomb friction is the friction between _________________? two lubricated surfaces bodies having relative motion two dry surfaces solids and liquids 47 / 50 Which of the following has sliding motion________________? crank cross-head connecting rod crank pin 48 / 50 Cork is a good insulator because it has___________________? free electrons atoms colliding frequency porous body low density 49 / 50 Maximum principal stress theory is applicable for_____________________? elastic materials brittle materials all of the above ductile materials 50 / 50 The term scavenging is generally associated with______________________? 4-stroke cycle engines aeroplane engines high efficiency engines 2-stroke cycle engines 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 2 Mechanical Engineering Quiz 4Next
