1. #1

    Give me a few Technical questions that are related to Basic Mechanical Concepts?

    mechanaical basic objective technical questions

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  3. #2
    Join Date
    Jan 2012

    Re: Give me a few Technical questions that are related to Basic Mechanical Concepts?

    Quote Originally Posted by Unregistered View Post
    mechanaical basic objective technical questions

    Test your mechanical technical knowledge by answering the following questions with the reason for that answer:

    1.machine tool drives are generally given in:

    a) arithmetic progression b)geometric progression
    c) harmonic progression d)none of the above

    2.finite element analysis is used in

    a) accurate measurement b)stress analysis
    c)metallurgy d)none of the above

    3.coolant is generally not used while machining

    a) low carbon steel b)high carbon steel
    c) cast iron d)alloy steel

    4.Machinability of steel is improved by the presence of

    a)nickel b)tungsten
    c)sulphur d)chromium

    5.negative rake angle

    a)increases cutting force b)decreases cutting force
    c)no effect on cutting force d)none of the above

    6.the hardest tool material used is

    a)coated carbide b)high speed steel
    c)boron nitride d)diamond

    7.stick slip phenomenon is associated with

    a)spindle rotation b)belt drives
    c)slide movement d)none of the above

    8.Gear hobbing is

    a)shaping process b)generating process
    c)forming process

    9.cutting speed of H.S.S tools while cutting low carbon steel

    a)40m/min b)250m/min
    c)500m/min d)none

    10.cutting speed of carbide tools while cutting low carbon steel

    a)40m/min b)250m/min
    c)500m/min d)80m/min

    11.straightness that can be achieved over a length of 300mm by grinding

    a).005 -.01mm b)0.1-0.2mm
    c)0.05-0.1mm d)0.5-0.8mm

    12.the circularity that can be achieved by finish turning on a standard centre lathe is

    a)0.005-0.008mm b)0.0-0.08mm
    c)0.1-0.2mm d)0.2-0.3mm

    13.honing can correct

    a)oviality b)taper
    c)straightness of bore d)axial curvature

    14.Machine tool sliding surfaces are finish matched by

    a)surface grinding b)fine milling
    c)slide way grinding d)scraping

    15.Close sliding fit is given by

    a)H7/g6 b)H7/h6
    c)H9/p6 d)H7/k6

    16.60H6 can be achieved by

    a)turning b)boring
    c)drilling d)internal grinding

    17.The displacement accuracy which can be achieved on a jig boring machine

    a)5/µm b)50/µm c)100/µm

    18.Hardness value in cast iron can be measured in

    a)shore b)BHN c)Rockwell d)none

    19.Auto collimator is used to measure

    a)dia upto 0.001mm b)lengths
    c)straightness d)Involute error

    20.Surface finish is measured by

    a)comparator b)planograph
    c)sprit level d)none

    21.The outside diameter of a 20 teeth 3 module gear is

    a)54 b)60 c)63 d)70

    22.Herring bone gear is used for

    a)High speed transmission b)noise free transmission
    c)Better load transmission d)none

    23.In a right angle transmission by helical gears, the hand of the helix of the gears are

    a)same b)opposite c)Immaterial d)none

    24.Worm drive is always self-locking

    a)True b)false

    25.Most hydrostatic bearings normally work under

    a)constant flow system b)constant pressure system
    c)constant temperature system d)constant volume system

    26.Ball bearings are not generally used in crank shafts of automobiles because

    a)of high cost b)of high speed c)cannot be assembled d)none

    27.Bronze is used in journal bearings essential to

    a)reduce friction b)reduce heat
    c)eliminate oxidization d)eliminate seizing

    28.The spindle of high precision cylindrical grinder is mounted on

    a)Ball bearing b)Taper roller bearing
    c)Hydrostatic bronze bearing d)needle bearing

    29.To accelerate the flow of gases

    a)nozzle is used b)diffuser is used
    c)dia of pipe to increased d)none of these will help

    30.Hydraulic accumulator

    a)acts as an accumulator b)acts as a storage for hydraulic energy
    c)acts as a pressure relief d)none


    31.When ice which is floating in water, melts, does the level to water

    a)go up b)go down c)remain the same.

    32.Hammer blow in pipe happens due to

    a)friction in pipes b)change in temperature
    c)stoppage of flow d)none

    33.Temperature rise in fluid flow causes

    a)reduction in viscosity b)increase in viscosity c)no effect

    34.Ratio between velocity of sound and velocity of any object is

    a)prandtl number b)Reynolds number
    c)avagadro’s number d)mach number

    35.Cavitaion effect in flow occurs due to

    a)excess pressure b)excess temperature
    c)excess flow d)none

    36.In electrical locomotives ultimate transmission is by

    a)AC Motor b)DC Shunt Motor
    c)DC Series Motor d)Synchronous motor

    37.Four beams of identical sections and lengths are made of cast iron, aluminium,steel and hardened steel. The beams are fixed at both ends; for a uniformly distributed load which will deflect least

    a)cast iron b)aluminium c)steel d)hardened steel

    38.Geneva mechanism is used for obtaining

    a)Intermittent motion b)accelerating motion
    c)continuous motion d)none

    39.Corioles component is associated with

    a)Displacement b)acceleration
    c)velocity d)none

    40.Effect of increase of outside diameter of a helical compression spring on its rigidity is

    a)increased rigidity b)decreased rigidity
    c)no effect d)dry friction

    41.Jominey curve is related to the study of

    a)hydraulics b)thermodynamics
    c)electrical d)none

    42.TTT diagram is used in

    a)surface finish b)heat treatment

    thankyou !!!

  4. #3
    Join Date
    Jun 2012

    Re: Give me a few Technical questions that are related to Basic Mechanical Concepts?

    what is the acceleration at the point of contact of a disc rolling without slipping on a floor.

    what are the forces acting on a body that is flying in the air.

    when the pressure is 1atm. what does a pressure gauge show the reading as?

    bernoulli's equation is applicable to only --------------------- fluids.

    which side of a venturimeter is longer?

    cavitation in turbines can be reduced by -------------

    pumps are used for ------------------ and compressors are used for-----------------------

    The number of power strokes in one cycle of a two stroke engine is------------------------

    the entropy of a body is zero at ------------------------

    the highest efficiency is obtained in --------------------- cycle.

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