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  • Johndeil Jay Trazo

  • 問題数 48 • 11/1/2023

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    問題一覧

  • 1

    A heavy rotating body which saves as a reser absorbing and rebuting in energy

    Flywheel

  • 2

    Which of the following is not the use of spring

    measure the thickness

  • 3

    the ratio pf mean diameter of coil over the coil diameter is known as

    spring index

  • 4

    the overall lenght of the spring when it is compressed until all adjacent coils touched

    solid length

  • 5

    the length of the coil spring under no load is known as

    free length

  • 6

    in genera, the steel springs are made of relatively high carbon steel usually

    more than 0.5%

  • 7

    when heat treated wire is coiled cold it should be stress releived for bending stresses after cooling by being heated at some

    500F

  • 8

    a low cost spring material, suitable where service is not severe and dimensional precision is not needed

    Hard drawn wire spring

  • 9

    a hard drawn also 80% reduction but it is made of high grade steel

    music wire

  • 10

    a spring wire with good quality for impact loads and moderately high temperature is known as

    chromium silicon

  • 11

    a type of coil where the helical coil is wrapped into a circle forming an annular ring

    garter spring

  • 12

    a type of spring where thin flat strip wound up on itself as a plane spiral, usually anchored at the inside

    motor spring

  • 13

    a type of spring made in the form of dished washed

    Belleville spring

  • 14

    in laminated spring the strips are provided in different lengths for

    economy

  • 15

    an elastic stored stored energy machine element that when released, will recover its basic form

    spring

  • 16

    when a spring is made of ductile material the curvature factor would be

    unity

  • 17

    the solid length plus the clearance plus the maximum deflection is called

    free length

  • 18

    the majority of coils springs are made of coil tempered carbon steel wire containing carbon

    0.60 to 0.70

  • 19

    experimental results indicate that the actual frequency of the spring is form

    10 to 15%

  • 20

    according to w.m Griffith the critical frequency of the spring should behold atleast ________ times the frequency of application of a perioduc load

    20

  • 21

    the actual number of coil is ____ in a squared and ground ends

    n+2

  • 22

    the solid length of squared ends is

    (n+3)d

  • 23

    the free length of ground ends is

    np

  • 24

    the shortest length for the spring during normal operation is known as

    operating length

  • 25

    the relationship between the force exerted by a spring and its deflection is called

    spring rate

  • 26

    the ration of the mean diameter of the spring to the wire diameter is called

    spring index

  • 27

    refera to the axial distance from a point on one coil to the corresponding point on the next adjacent coil

    pitch

  • 28

    the spring index for general industrial uses should be

    8 to 10

  • 29

    the spring index of valve and clutch is

    5

  • 30

    refers to the space between adjacent coils when the spring is compressed to its operating length

    coil clearance

  • 31

    the most practical spring designs produce a pitch angle is less than

    12 deg

  • 32

    engine valves get shut by means of

    valve spring

  • 33

    which of the following material to be used for leaf and coil springs

    AISI 4063

  • 34

    the length of coil spring times the effective number of coil is called

    active length

  • 35

    for the springs subjected to light service, the factor of safety of ___ is suggested

    1.5

  • 36

    refers to a flat or curved made of thin superimposed plates and forming q cantilever or beam of uniform strength

    laminated spring

  • 37

    cross wire grooves are types which

    absorb shocks because of the road unevenness

  • 38

    the _______ of the parallel connection of spring is always constant

    elongation

  • 39

    speedometer drive is generally taken from

    front wheel

  • 40

    typical hub length falls between

    1.25D to 2.4D

  • 41

    the recommended coefficient of fluctuation of flywheels for punching, sheering, and pressing machine is

    0.05 to 0.10

  • 42

    attached to the rear end of the crankshaft is the

    flywheel

  • 43

    the kind of energy stored in the flywheel is

    kinetic energy

  • 44

    the function of flywheel is

    all of the above

  • 45

    in many flywheel designs about ____ per cent of the weight is concentrated in the hub and arms.

    30

  • 46

    a large rotary machine parts whose function is to store energy and to produced uniform angular velocity of the shaft of reciprocating engine is known as

    flywheel

  • 47

    a massive wheel, which by its inertia assists in securing uniform motion of machinery by resisting sudden changes of speed

    flywheel

  • 48

    the function of a flywheel is to

    complete the unuseful stroke