Torque tubes are used for transmitting:
Torsion loads. Where an angular or twisting motion is needed . Tension of the control cables is measured with:
Special tensiometers which enable tension measure without disassemble. . The purpose of pulley in control cable system is:
To guide and support cable for its change of direction. . What means cable designation 3/8, 7x19?
This is a steel cable of outer diameter 3/8 inch, with 7 strands, 19 wires in each strand. . Which is the most important advantages of control cables:
Lightweight, high loadable, need only limited space, operates with no play . Which are the most disantvantages of control cables?
Cable extends with the time, sensitive to temperature changes after longer operation. . Which is the function of the turnbuckle in the control cable assembly?
To adjust the length and tension of the cable. . If pulley is too Large for the cable:
Then pulley will be more worn out at the center of the groove. . Hardness refers to
Ability of a material to resist abrasion, penetration and cutting action. . What is strength refers to?
It is ability of material to resist to deformation. . Brittleness is the property of material:
Very hard steel, cast iron, cast aluminum. . Of which material highly loaded parts as landing gear and engine mounts are made?
Steel. . The best properties of high carbon steel parts is achieved by
Forging with heat treatment. . Steels contain 0,5% to 1.05% of carbon are treated as
High carbón steels. . Which are the locations of use of INCONEL?
Where parts are exposed to high temperatures. . Extruding is a process where Material is forced through an opening in a die . Annealing is the process
Of softening of material. . Which are the properties of ferrous materials?
Having iron as a main constituent. . Tempering is always applied
After hardening of material. . Which is the fastest quenching media?
Brine. . Which property of metallic materials is elasticity?
That deformation disappears after removal of the load. . Which property of metalic materials is hardness?
Property which indicates, at which force material permits penetration of another material through its surface. . Which property of metalic materials is toughness?
That material require high amount of load and plastic deformation to brake. . Carburising is a process where
Carbon is added into surface of low carbon steels. . With respect to ferrous metals which of the following is true? Iron is a main element and ferrous metals are magnetic. . Brine as cooling media is usually made of
5% to 10% of salt in water. . Properties of metals are? Hardness, strength, ductility, brittleness, elasticity, heat resistance. . What is elasticity?
Property which enables the material to return in its original size and shape after force that causes it is removed. . Carbon steel is iron?
which possesses up to 1% of carbon. . Thermal expansión is? (1.3) Increase of material dimensions when heated up. . Nickel in carbon steels increase Hardness. . Chromium in carbon steels increase
Corrosion resistance properties. . Stainless steels
Have corrosión resistance properties. . Fusibility is
Ability of metal to melt under heat. . Conductivity is the property of metal
Which allows heat and/or electricity be transferred through it. . Ferrous materials are the ones which
Have iron as main constituent. . Inconel is the material that possesses
More than 50% of nickel. . Density is
Is the weight per unit volume of material. . Strength is ability of material to
Resist deformation. . Aluminium melts at app. 1100°F. . Steels melt at app 2600°F. . Is glass considered brittle Yes. . During the Rockwell hardness test, what dimension is measured?
The depth of the indent. . Which of the following are all hardness testing machines?
Rockwell, Vickers and Brinell. . What type of a test involves streching material until it breaks? TENSILE STRENGTH TESTING . Fatigue is
Weakness in materials caused by repeated variations of stress. . Impact testing
Measures the amount of energy needed for test part to fracture and fail. . Micro cracks caused by metal fatigue Can be found by use of NDT methods. . Non-ferrous metals are:
All metals which have elements other than iron as their base or principal constituent. . Alclad is a metal consisting of Pure aluminum surface layers on an aluminum alloy core. .
|