0% 3 Mechanical Engineering Quiz 10 1 / 50 I.S. specifies following total number of grades of tolerances__________________? 18 22 20 16 2 / 50 As a result of detonation in an I.C engine, following parameter attains very high value _____________________? peak temperature rate of rise of pressure peak pressure rate of rise of temperature 3 / 50 Which of the following is independent of sales forecast______________? production control inventory control productivity production planning 4 / 50 Petrol is distilled at a temperature in range of__________________? 30 ? 65?C 65 ? 220?C 220-350?C 350-450?C 5 / 50 In which case the air-fuel ratio is likely to be maximum _________________? 4-stroke diesef engine 4-stroke petrol engine 2-stroke engine gas turbine 6 / 50 The pour point of diesel oil must be_________________? more than 100?C lower than the coldest atmospheric temperature at which oil is to be pumped has no such relation higher than above 7 / 50 Amongst the following, the fissionable materials are________________? U23iandPu233 U238andPu239 U233andPu239 U235andPu235 8 / 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___________________? 4.0 cm 3.0 cm 2.5 cm 5.0 cm 9 / 50 The ultimate tensile strength of low carbon steel by working at a high strain rate will_________________? first increase and then decrease remain constant increase decrease 10 / 50 The Ackermann steering mechanism is preferred to the Davis type in automobiles because____________________? the former is most economical the former is most rigid the former is having turning pair the former is mathematically accurate 11 / 50 The efficiency of a nuclear power plant in comparsion to a conventional thermal power plant is________________? less same more may be less or mote depending on size 12 / 50 In vapor compression refrigeration system, refrigerant occurs as liquid between_________________? condenser and expansion valve expansion valve and evaporator compressor and evaporator compressor and condenser 13 / 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_________________? tension any one of the above bearing compression 14 / 50 Pulverized fuel is used for___________________? medium sized units less radiation loss more calorific value better burning 15 / 50 A diesel engine as compared to petrol engine (both running ar rated load) is ____________________? more efficient equally efficient less efficient unperdictable 16 / 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 17 / 50 In axial flow fans and turbines, fluid enters and leaves as follows________________? radially, radially axially, radially radially, axially axially, axially 18 / 50 Pick up the wrong statement? In a heterogeneous or solid-fuel reactor, the fuel is mixed in a regular pattern within moderator. Fast neutrons have energies above 1000 eV Slow or thermal neutrons have energy of the order or 0.025 eV Fast reactor uses moderator 19 / 50 Kinematic pairs are those which have two elements that ______________? permit relative motion are held together have line contact have surface contact 20 / 50 Corioli?s component of acceleration exists whenever a point moves along a path that has________________? centripetal acceleration tangential acceleration rotational motion linear displacement 21 / 50 Monte Carlo solutions in queuing theory are extremely useful in queuing problems_________________? to verify mathematical results all of the above involving multistage queuing that can?t be analysed mathematically 22 / 50 Inertia force acts___________________? along the direction of accel* force in any direction w.r.t. accel* force depending on the magnit two opposite to the direction of ace ing force perpendicular to the accel< force 23 / 50 A diesel engine has_________________? 3 valves 4 valves 2 valves 1 valve 24 / 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 incompressible and has zero viscosity only when the fluid is frictionless 25 / 50 A neutral flame is obtained by supplying___________________? none of the above equal volumes of oxygen and acetylene more volume of oxygen and less volume of acetylene more volume of acetylene and less volume of oxygen 26 / 50 Which tool is used to measure gap size in a rough alignment? Measuring tape Feeler gage Dial indicator Inside caliper 27 / 50 A key is subjected to side pressure as well at shearing forces. These pressures are called_________________? bearing stresses fatigue stresses crushing stresses resultant stresses 28 / 50 Connecting rod is usually made of_________________? aluminium low carbon steel medium carbon steel high carbon steel 29 / 50 Francis turbine is best suited for_____________________? high head installation above 180 m medium head application from 24 to 180 m low head installation up to 30 m all types of heads 30 / 50 Pick up the correct statement about relationship between various floats______________________? independent float = total float independent float > free float free float = total float independent float < free float 31 / 50 In order that a cycle be reversible, following must be satisfied ________________? when heat is being absorbed, temperature of hot source and working sub?stance should be same when beat is being rejected, temperature of cold source and working sub-stance should be same free expansion or friction resisted expansion/compression process should not be encountered all of the above 32 / 50 Which of the following parameters is constant for a mole for most of the gases at a given temperature and pressure___________________? mass enthalpy volume entropy 33 / 50 Elastic nut is a locking device in which__________________? a slot is cut partly in middle of nut and then slot reduced by tightening a screw 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 one small nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming 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 34 / 50 The metallic structure of mild steel is_________________? body centred cubic hexagonal close packed face centred cubic cubic structure 35 / 50 Blast furnace produces following by reduction of iron ore_______________? wrought iron malleable iron pig iron cast iron 36 / 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________________? Rich mixture Lean mixture Chemically correct fuel air ratio Unpredictable 37 / 50 Gnatt charts are used for_________________? linear programming production schedule scheduling and routing forecasting sales 38 / 50 Inventory control in production, planning and control aims at________________? discounts allowed in bulk purchase achieving optimisation ensuring against market fluctuations acceptable customer service at low capital investment in inventory 39 / 50 Wrought iron is________________? highly resistant to corrosion heat treated to change its properties high in strength hard 40 / 50 The composition of silver solder is ___________________? silver, tin, nickel silver, copper, zinc silver, copper, aluminium silver, lead, zinc 41 / 50 In PERT analysis, critical path is obtained by joining events having___________________? zero sldck #NAME? #NAME? dummy activities 42 / 50 The compression ratio in a gas turbine is of the roder of____________________? 5:01 12:01 8:01 3.5 : 1 43 / 50 Structural steel contains following principal alloying elements__________________? lead, tin, aluminium nickel, chromium and manganese tungsten, molybdenum and phosphorous zinc, sulphur, and chromium 44 / 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 45 / 50 In actual machines_____________________? mechanical advantage is equal to velocity ratio mechanical advantage is greater than velocity ratio mechanical advantage is less than velocity ratio mechanical advantage is unity 46 / 50 Kinematic viscosity is equal to_________________? 1/dynamicviscosity x density density/dynamic viscosity dynamic viscosity/density dynamicviscosity x density 47 / 50 Solids and liquids have___________________? three values of specific heat None no value of specific heat one value of specific heat (ft) two values of specific heat 48 / 50 Free air is the air at________________? 0?C and standard atmospheric conditions 20?C and 1 kg/cm2 and relative humidity of 36% 15?C and 1 kg/cm2 atmospheric conditions at any specific location 49 / 50 Thermal conductivity of wood depends on_______________? moisture all of the above density temperature 50 / 50 Which is correct statement about reaction time for autoignition of fuel and the fuel air ratio__________________? all of the above chemically correct mixture has mini-mum reaction time rich mixture has high reaction time 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
