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2012_OL1_1.3_E_Student_017717_Marker_42.pdf

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1 ©Lifting Equipment Engineers Association 2012 - training\1-3e3e0000 LEEA Correspondence Courses ASSIGNMENT 1.3 Please note: Use the up and down cursor keys to move between fields in this form. Enter your name and student number in the spaces below. Name: SONU VARGHESE GEORGE Student number: 17717 Each question has several answers, only one of which is correct. Select your answer by typing # in the box. When complete, save the
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    1 © Lifting Equipment Engineers Association 2012 - training\1-3e3e0000  LEEA Correspondence Courses  ASSIGNMENT 1.3   Please note: Use the up and down cursor keys to move between fields in this form. Enter your name and student number in the spaces below. Name: SONU VARGHESE GEORGE Student number: 17717   Each question has several answers, only one of which is correct. Select your answer by typing # in the box. When complete, save the file using the same name. Then use the upload facility to return it for marking. 1. The single most important property of materials used in the manufacture of lifting equipment is: Toughness # Strength Brittleness Ductility 2. Ductility is: The tendency to fracture without visible plastic deformation The ability of a material to return to its srcinal dimensions after the removal of the stress The ability to resist rupture when a load is applied # The ability to undergo cold plastic deformation, usually as the result of tension 3. Strength is: The tendency to fracture without visible plastic deformation The ability of a material to return to its srcinal dimensions after removal of the stress # The ability to resist rupture when a load is applied The ability to undergo cold plastic deformation, usually as the result of tension 4. Brittleness is: # The tendency to fracture without visible plastic deformation The ability of a material to return to its srcinal dimensions after removal of the stress The ability to resist rupture when a load is applied The ability to undergo cold plastic deformation, usually as the result of tension 5. A material needs to display hardness so that: It will resist shock loads It will not deform under load # It will resist wear and abrasion It will corrosion resistant 6. It is generally true that a tough material will also be: # Strong Elastic Plastic Malleable    2 © Lifting Equipment Engineers Association 2012 - training\1-3e3e0000  7. Materials that are elastic will: # Return to their srcinal dimensions when the stress is removed Retain their new dimensions when the stress is removed  Also be malleable Tend to become brittle 8. Ferrite is the base element of: Polymers Brass and bronze # Iron and steel  Aluminium 9. The inclusion of up to 1% phosphorous in bronze makes it: Weaker # Stronger More prone to corrosion Un-machineable 10. Cast iron is: Ideal for the manufacture of chain fittings as it has high tensile strength Highly resistant to corrosion # Used to make jack bodies as is has high compressive strength Widely used in lifting equipment manufacture as it is easily welded 11. Typical uses of cast iron in lifting equipment are: Shackle and eyebolt manufacture Chain and chain sling manufacture # Trolley wheel and rope sheave manufacture The manufacture of end stops and travel stops for cranes and runways 12. A ‘killed steel’ is one which: # Has been treated to remove the oxygen during smelting Has been overheated during rolling so removing the carbon Has become plastic due to repeated rolling Has become very ductile due to constant hammering 13. Steels with a carbon content of 0.25% to 0.33% are known as: Mild steels # Higher tensile steels  Alloy steels Stainless steels 14. Higher tensile steel is: Weaker than wrought iron One third weaker than mild steel Stronger than alloy steel # One third stronger than mild steel    3 © Lifting Equipment Engineers Association 2012 - training\1-3e3e0000  15. A steel with added nickel, chromium and molybdenum is known as: Mild steel Higher tensile steel High tensile steel #  Alloy steel 16. A high carbon content in iron and steel: Makes it very easy to weld Makes it impossible to weld # Makes it less easy to weld Makes it liable to smelt when welded 17. Metals with little or no iron in their composition are known as: Polymers Plastics Ferrous metals # Non-ferrous metals 18. Sisal is the product of: The cotton plant The wild banana tree # Cactus Cannabis grass 19. The use of timber for loadbearing structural members is: To be recommended due to its low cost when compared to steel # Effectively banned Common for derrick cranes Common for gantries and runways 20. Chemically based man-made materials, of long chain like molecules, with a carbon backbone are known as: Latex Neoprene # Polymers Plantain Marking  Answers still shown in black were correct  Answers now shown in red were incorrect – the correct answers are shown in blue Result  100%  
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