0% 3 Mechanical Engineering Quiz 10 1 / 50 The ultimate tensile strength of low carbon steel by working at a high strain rate will_________________? remain constant decrease increase first increase and then decrease 2 / 50 Monte Carlo solutions in queuing theory are extremely useful in queuing problems_________________? that can?t be analysed mathematically all of the above involving multistage queuing to verify mathematical results 3 / 50 The metallic structure of mild steel is_________________? body centred cubic cubic structure face centred cubic hexagonal close packed 4 / 50 A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span___________________? 5.0 cm 2.5 cm 3.0 cm 4.0 cm 5 / 50 Pulverized fuel is used for___________________? medium sized units less radiation loss more calorific value better burning 6 / 50 In which case the air-fuel ratio is likely to be maximum _________________? 2-stroke engine 4-stroke diesef engine gas turbine 4-stroke petrol engine 7 / 50 In PERT analysis, critical path is obtained by joining events having___________________? zero sldck #NAME? dummy activities #NAME? 8 / 50 Connecting rod is usually made of_________________? low carbon steel high carbon steel medium carbon steel aluminium 9 / 50 Petrol is distilled at a temperature in range of__________________? 65 ? 220?C 220-350?C 30 ? 65?C 350-450?C 10 / 50 A neutral flame is obtained by supplying___________________? more volume of acetylene and less volume of oxygen more volume of oxygen and less volume of acetylene equal volumes of oxygen and acetylene none of the above 11 / 50 As a result of detonation in an I.C engine, following parameter attains very high value _____________________? rate of rise of temperature peak pressure peak temperature rate of rise of pressure 12 / 50 A diesel engine as compared to petrol engine (both running ar rated load) is ____________________? more efficient equally efficient unperdictable less efficient 13 / 50 The normal stress is same in all directions at a point in a fluid_______________? irrespective of the motion of one fluid layer relative to an adjacent layer when there is no motion of one fluid layer relative to an adjacent layer only when the fluid is frictionless only when the fluid is incompressible and has zero viscosity 14 / 50 Which tool is used to measure gap size in a rough alignment? Feeler gage Dial indicator Measuring tape Inside caliper 15 / 50 Kinematic viscosity is equal to_________________? 1/dynamicviscosity x density density/dynamic viscosity dynamicviscosity x density dynamic viscosity/density 16 / 50 Inertia force acts___________________? opposite to the direction of ace ing force perpendicular to the accel< force in any direction w.r.t. accel* force depending on the magnit two along the direction of accel* force 17 / 50 The pour point of diesel oil must be_________________? more than 100?C has no such relation higher than above lower than the coldest atmospheric temperature at which oil is to be pumped 18 / 50 Wrought iron is________________? highly resistant to corrosion heat treated to change its properties hard high in strength 19 / 50 Which of the following parameters is constant for a mole for most of the gases at a given temperature and pressure___________________? volume entropy mass enthalpy 20 / 50 The compression ratio in a gas turbine is of the roder of____________________? 5:01 8:01 3.5 : 1 12:01 21 / 50 Pick up the wrong statement? Fast reactor uses moderator Slow or thermal neutrons have energy of the order or 0.025 eV Fast neutrons have energies above 1000 eV In a heterogeneous or solid-fuel reactor, the fuel is mixed in a regular pattern within moderator. 22 / 50 Kinematic pairs are those which have two elements that ______________? permit relative motion have surface contact have line contact are held together 23 / 50 Solids and liquids have___________________? no value of specific heat None one value of specific heat (ft) two values of specific heat three values of specific heat 24 / 50 I.S. specifies following total number of grades of tolerances__________________? 16 20 18 22 25 / 50 Corioli?s component of acceleration exists whenever a point moves along a path that has________________? tangential acceleration centripetal acceleration rotational motion linear displacement 26 / 50 Amongst the following, the fissionable materials are________________? U235andPu235 U238andPu239 U233andPu239 U23iandPu233 27 / 50 Francis turbine is best suited for_____________________? low head installation up to 30 m high head installation above 180 m medium head application from 24 to 180 m all types of heads 28 / 50 Elastic nut is a locking device in which__________________? through slots are made at top and a cotter-pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at other end a slot is cut partly in middle of nut and then slot reduced by tightening a screw hard fiber or nylon cotter is recessed in the nut and becomes threaded as the nut is stewed on the bolt causing a tight grip one small nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming 29 / 50 Inventory control in production, planning and control aims at________________? discounts allowed in bulk purchase achieving optimisation acceptable customer service at low capital investment in inventory ensuring against market fluctuations 30 / 50 Turn buckle has____________________? no threads left hand threads on both ends left hand threads on one end and right hand threads on other end right hand threads on bout ends 31 / 50 A key is subjected to side pressure as well at shearing forces. These pressures are called_________________? crushing stresses bearing stresses resultant stresses fatigue stresses 32 / 50 Blast furnace produces following by reduction of iron ore_______________? cast iron malleable iron wrought iron pig iron 33 / 50 Pick up the correct statement about relationship between various floats______________________? independent float > free float independent float < free float free float = total float independent float = total float 34 / 50 Structural steel contains following principal alloying elements__________________? lead, tin, aluminium nickel, chromium and manganese tungsten, molybdenum and phosphorous zinc, sulphur, and chromium 35 / 50 Free air is the air at________________? atmospheric conditions at any specific location 0?C and standard atmospheric conditions 15?C and 1 kg/cm2 20?C and 1 kg/cm2 and relative humidity of 36% 36 / 50 In axial flow fans and turbines, fluid enters and leaves as follows________________? axially, axially radially, radially axially, radially radially, axially 37 / 50 The Ackermann steering mechanism is preferred to the Davis type in automobiles because____________________? the former is having turning pair the former is most rigid the former is mathematically accurate the former is most economical 38 / 50 In actual machines_____________________? mechanical advantage is unity mechanical advantage is greater than velocity ratio mechanical advantage is equal to velocity ratio mechanical advantage is less than velocity ratio 39 / 50 Auto-ignition reaction time for petrol engine first decreases with increase in fuel air ratio, reaches a minimum value and then increases with subsequent increase in fuel air ratio. The minimum value occurs in the region of________________? Lean mixture Unpredictable Chemically correct fuel air ratio Rich mixture 40 / 50 Efficiency of a riveted joint is the ratio of its strength (max. load it can resist without failure) to the strength of the unpunched plate in_________________? compression tension bearing any one of the above 41 / 50 In order that a cycle be reversible, following must be satisfied ________________? when beat is being rejected, temperature of cold source and working sub-stance should be same all of the above free expansion or friction resisted expansion/compression process should not be encountered when heat is being absorbed, temperature of hot source and working sub?stance should be same 42 / 50 Thermal conductivity of wood depends on_______________? all of the above moisture density temperature 43 / 50 A diesel engine has_________________? 1 valve 4 valves 2 valves 3 valves 44 / 50 Which of the following is independent of sales forecast______________? inventory control production planning production control productivity 45 / 50 On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be___________________? towards the wall at its upper end upwards at its upper end downwards at its upper end away from the wall at its upper end 46 / 50 In vapor compression refrigeration system, refrigerant occurs as liquid between_________________? compressor and evaporator condenser and expansion valve compressor and condenser expansion valve and evaporator 47 / 50 The efficiency of a nuclear power plant in comparsion to a conventional thermal power plant is________________? more may be less or mote depending on size less same 48 / 50 Gnatt charts are used for_________________? linear programming scheduling and routing production schedule forecasting sales 49 / 50 The composition of silver solder is ___________________? silver, lead, zinc silver, tin, nickel silver, copper, zinc silver, copper, aluminium 50 / 50 Which is correct statement about reaction time for autoignition of fuel and the fuel air ratio__________________? chemically correct mixture has mini-mum reaction time rich mixture has high reaction time all of the above lean mixture has high reaction time Provide Your Information Your score is The average score is 60% LinkedIn Facebook Twitter 0% Restart quiz Send feedback Share on facebook Facebook Share on twitter Twitter Share on whatsapp WhatsApp PrevMechanical Engineering Quiz 9 Mechanical Engineering Quiz 11Next
