0% 3 Mechanical Engineering Quiz 8 1 / 50 Endurance limit or fatigue limit is the maximum stress that a member can withstand for an infinite number of load applications without failure when subjected to________________? static loading completely reversed loading dynamic loading combined static and dynamic loading 2 / 50 If n = number of members andy = number of joints, then for a perfect frame, n =________________? 2/-3 3/-2 j-2 2j-l 3 / 50 A boiling water reactor uses following as fuel________________? enriched uranium U thorium plutonium 4 / 50 A chain comprises of 5 links having 5 joints. Is it kinematic chain ? no data are insufficient to determine it it is a marginal case yes 5 / 50 A nuclear unit becoming critical means_______________? there is danger of nuclear spread chain reaction that causes automatic splitting of the fuel nuclei has been established it is generating power to rated capacity it is capable of generating much more than rated capacity 6 / 50 Which is false statement about advantages of multistage compressor in comparison to single stage compressor_________________? lower volumetric efficiency less loss of air due to leakage past the cylinder less power requirement better mechanical balance 7 / 50 Combustion in compression ignition engines is____________________? heterogeneous None laminar homogeneous 8 / 50 The knock in diesel engine occurs due to____________________? instantaneous and rapid burning of the first part of the charge instantaneous atuo iginition of last part of charge reduction of delay period delayed burning of the first part of the charge 9 / 50 A two stroke crank compressed engine has following ports in the cylinder_______________? transfer port only suction port and transfer port suction port, exhaust port and transfer port suction port and exhaust port 10 / 50 Cold rolled steel sheets contain carbon of the following order___________________? 0.20% 0.40% 0.10% 0.60% 11 / 50 Which is more viscous lub oil_________________? SAE 80 SEA 30 SAE 4? SAE 50 12 / 50 A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is________________? Brine Carbon dioxide Ammonia Freon 13 / 50 Mach number is significant in_____________________? supersonics, as with projectiles and jet propulsion simultaneous motion through two fluids where there is a surface of dis-continuity, gravity force, and wave making effects, as with ship?s hulls full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc. all of fhe above 14 / 50 According to Avogadro?s Hypothesis ______________________? product of the gas constant and the molecular weight of an ideal gas is constant the molecular weights of all the perfect gases occupy the same volume under same conditions of pressure and temperature the sum of partial pressure of mixture of two gases is sum of the two gases have two values of specific heat 15 / 50 Heat flows from one body to other when they have_________________? different heat contents different atomic structure different temperatures different specific heat 16 / 50 The draw of cotter need not exceed_________________? 20 mm 10 mm 5 mm 3 mm 17 / 50 An engine indicator is used to determine the following___________________? speed temperature m.e.p. and I.H.P. volume of cylinder 18 / 50 During a tensile test on a specimen of 1 cm cross-section, maximum load observed was 8 tonnes and area of cross-section at neck was 0.5 cm2. Ultimate tensile strength of specimen is___________________? 4 tonnes/cm2 16 tonnes/cm2 8 tonnes/cm2 22 tonnes/cm2 19 / 50 Water and sediment in fuel oil can be removed by _______________________? heating the oil in the settling tanks burning the oil cooling the oil in the settling tanks suspension 20 / 50 If p = bearing pressure on projected bearing area, z = absolute viscosity of lubricant, and N = speed of journal, then the bearing characteristic number is given by________________? p/ZN N/Zp ZN/p Z/pN 21 / 50 The stress at which extension of the material takes place more quickly as compared to the increase in load is called______________? elastic point of the material plastic point of the material breaking point of the material yielding point of the material 22 / 50 The difference of pressure between the inside and outside of a liquid drop is _______________? p = Txr p = T/2r p = 2T/r p = T/r 23 / 50 Capillary action is due to the_________________? surface tension all of the above cohesion of the liquid adhesion of the liquid molecules and the molecules on the surface of a solid 24 / 50 Bomb calorimeter is used to determine ___________________? Higher calorific value at constant pressure Lower calorific value at constant pressure Higher calorific value at constant volume Lower calorific value at constant volume , 25 / 50 String diagram is used when__________________? idle time is to be reduced team of workers is working at a place all of the above material handling is to be done 26 / 50 Routing assists engineers in deciding in advance___________________? the flow of material in the plant the methods of proper utilization of manpower the layout of factory facilities the methods of proper utilization of machines 27 / 50 Steel made from phosphatic iron is_________________? hard brittle ductile tough 28 / 50 The C.O.P of a refrigeration cycle with increase in evaporator temperature, keeping condenser temperature constant, will______________________? decrease increase remain unaffected may increase or decrease depending on the type of refrigerant used 29 / 50 The main advantage of line organisation is its_______________? defined responsibilities at all levels effective command and control rigid discipline in the organisation all of the above 30 / 50 The C.G. of a plane lamina will not be at its geometrical centre in the case of a__________________? square circle equilateral triangle right angled triangle 31 / 50 Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the_________________? force of friction force of cohesion force of diffusion force of adhesion 32 / 50 Time study is__________________? method of fixing time for workers time taken by workers to do a job the appraisal, in terms of time, of the value of work involving human effort machine setting time 33 / 50 A large Roynold number is indication of________________? laminar flow smooth and streamline flow highly turbulent flow steady flow 34 / 50 Drop forging dies contain carbon of the order of_________________? 0.7 to 0.9% 0.1 to 0.2% 0.6 to 0.7% 0.25 to 0.5% 35 / 50 Antifriction bearings are__________________? thin lubricated bearings hydrodynamic bearings none of the above sleeve bearings 36 / 50 Critical Path Net Work helps an engineer_________________? to concentrate his attention on critical activities all of the above to divert the resources from non-critical advanced activities to critical activities to be cautious for avoiding any delay in the critical activities to avoid delay of the whole project 37 / 50 Micro motion study is__________________? study of man and machine conducted simultaneously motion study* observed on enhanced time intervals analysis of a man-work method by using a motion picture camera with a timing device in the field of view motion study of a sequence of operations conducted systematically 38 / 50 Which of the following depreciation system ensures that the interest be charged on the cost of machine asset every year on the book value, but the rate of depreciation every year remains constant_____________________? A-B-C charging method annuity charging method straight line method sinking fund method 39 / 50 A particle moves along a straight line such that distance (x) traversed in t seconds is given by x = t2 (t ? 4), the acceleration of the particle will be given by the equation __________________? 3t2+2t 6f-4 6f-8 3t2-lt 40 / 50 The ratio of absolute viscosity to mass density is known as_________________? viscosity index kinematic viscosity coefficient of viscosity specific viscosity 41 / 50 Density of water is maximum at__________________? 4?C 100?C 0?C 0?K 42 / 50 Work study is concerned with_________________? improving production capability motivation of workers improving present method and finding standard time improving production planning and control 43 / 50 Presence of moisture in a refrigerant affects the working of___________________? evaparator expansion valve compressor condenser 44 / 50 Molecular volume of any perfect gas at 600 x 103 N/m2 and 27?C will be ____________________? 400 m3/kg mol 4.17m3/kgmol 41.7 m3/kg mol 0.15 m3/kg mol 45 / 50 An example of amorphous material is____________? silver lead glass zinc 46 / 50 Work done is zero for the following process_________________? constant volume throttling free expansion all Of the above 47 / 50 The compression ratio in a jet engine varies proportional to ____________________? altitude Vspeed speed speed 48 / 50 A key capable of tilting in a recess milled out in a shaft is known as______________________? wood-ruff key flat saddle key gib head key feather key 49 / 50 Detonation is caused by the following unstable compounds______________________? peroxides, aldehydes, oxides and sul-phides ketones and sulphur compounds aldehydes, oxides and ketones peroxides, aldehydes and ketones 50 / 50 The mean effective pressure obtained from engine indicator indicates the________________? average pressure minimum pressure instantaneous pressure at any instant maximum pressure developed Provide Your Information Your score is The average score is 83% LinkedIn Facebook Twitter 0% Restart quiz Send feedback Share on facebook Facebook Share on twitter Twitter Share on whatsapp WhatsApp PrevMechanical Engineering Quiz 7 Mechanical Engineering Quiz 9Next
