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