5th Six Month Final Flashcards
105-1. A metals ability to change shape without breaking is called malleability or
ductility
105-2. The ability of a metal to return to its original shape after being deformed is called
elasticity
105-3. A solid and a liquid can exist together at the? Adding heat melts more of the solid, but does not change the?
melting point
Temperature
105-4. Alloys that contain iron as the base metal are known as?
steel
105-5. The speed and ease with which a metal can be cut on a machine tool is called its?
machinability
105-6. The maximum amount of stress a material can exert is called its
yield strength
105-7. Ts=F/A=
9,000lbs / 0.2 sq. in.=
45,000 psi
105-8. At high temperatures, an extremely slow, continuous distortion of certain metals produces another type of failure called?
creep
105 - 9. What is the mass of a material per unit of volume?
Density
105 - 10. What is the ratio between the density of a given material and the density of water called?
Specific gravity
105 - 11. Permanent mold casting use?
both metal cores and sand cores
105 - 12. What kind of force makes the metal flow away from the center and against the sides of the mold?
Centrifugal
105 - 13. Die casting is the most _________ of all casting methods. It is used in casting metals having no iron in them. These metals are called _________ metals.
rapid
nonferrous
105 - 14. The most common method of ________ is called upsetting.
cold forging
105 - 15. What is usually made from rod stock. The rod stock may be pulled through a tapered die.
Wire
105 - 16. Cast iron has a high carbon content with a relatively low melting point which makes it easier to cast than ________ and will break easily.
steel
105 - 17. A high carbon content makes the molten iron easy to
Break
105 - 18. Malleabilized iron is ________ and less brittle than white cast iron but it has ________ resistance to wear than gray iron.
softer
better
105 - 19. _________ __________ cast iron is used in making parts that must be hard and tough but not brittle.
High-alloy
105 - 20. What kind of furnaces include the open hearth, the basic oxygen, and the electric furnace.
Steelmaking
105 - 21. Of all the elements that may be included in steel, _________ is the most important.
carbon
105 - 22. Both the AISI and the SAE coding systems identifies each code number by the ________ ________ of one kind of ________.
chemical composition
steel
105 - 23. To make a spark test you simply hold the piece of metal against a spinning grinding wheel. The ________ _________ within the sparks will help you identify the metal.
color bursts
105 - 24. __________ quality sheet metals have a matte finish that holds paint well
Commercial
105 - 25. All Stainless steel’s contain?
chromium
105 - 26. Uneven heating and cooling causes _________, warp, and even crack in the area around the weld
Distortion
105 - 27. You can anneal the star drill by slowly heating it with an oxacetylene torch to a temperature above it’s critical temperature and allow it to?
cool very slowly.
105 - 28. With your broken gear fully annealed, you may now grind off the edges in preparation for welding. By ________ the whole gear to this temperature you can greatly reduce internal stresses that would otherwise build up during welding
heating
105 - 29. Low-carbon steels are more often .
forged
105 - 30. Steels containing ________ to _________ __________ are used as cutting tools and hand tools
0.55 to 1.00% carbon
105 - 31. _________ _________ makes the alloys even harder and stronger.
Cold working
105 - 32. A copper alloy containing a little lead is much ?
easier to machine
105 - 33. _________ __________ contains 36% to 50% zinc
Beta brass
105 - 34. Muntz metal is the __________ of the brasses
strongest
105 - 35. The copper alloy most widely used for casting is called
ounce metal
105 - 36. Aluminum _________ coating forms rapidly on its surface when metal is exposed to air.
oxide
105 - 37. Four digit number in system to describe aluminums. The _________ digit indicates the main alloying element
first
105 - 38. Thin layers of aluminum can be rolled onto a base metal to improve its appearance, or durability, or both. This process is called?
Cladding
105 - 39. Aluminum’s strength decreases greatly as the __________ of metal rises.
temperature
105 - 40. Intermediate temperature solders melt at temperatures of _________ to _________.
500*
To
700*
105 - 41. Magnesium is extracted from brines and ores by two methods _________ and _________
electrolysis
reduction
105 - 42. __________ has a lower temperature strength than EK, EZ, and ZE alloys
AZ
105 - 43. The letter “a” following the alloy designation indicates an _________ sheet.
annealed
105 - 44. Magnesium gas welding should be used only for _________ repairs
emergency
105 - 45. The usual melting and casting methods cannot be used for _________. An arc melting process is used in an atmosphere of inert gas called_________
titanium
argon
105 - 46. Various proportions of the lead and tin are alloyed to make?
solder
105 - 47. Lead wool can be used instead of molten lead to form a metallic cold _______.
seal
105 - 48. __________ is used in toasters.
Nichrome
105 - 49. __________ is widely used as a corrosion resistant coating for steel sheet the process is called galvanizing.
Zinc
105 - 50. The proper lubricants to use when machining zinc include?
lard oil
106 - 1. A liquid has a __________ volume but it’s shape can _________.
fixed
change
106 - 2. In the metric system, _________ is measured in kilograms per cubic meter (kg/m^3).
density
106 - 3. _________ is a cooling process
Evaporation
106 - 4. A __________ liquid is one that has a low boiling point
volatile
106 - 5. The solubility is usually _________ at the boiling point of a liquid.
zero
106 - 6. All plastics can be __________ as either thermoplastics or thermosets
classified
106 - 7. When choosing a plastic material, the __________ of the material is important
performance
106 - 8. Reinforcing- apply the _________ to the inside surface of a filament wound tank
patch
106 - 9. When drilling plastic, reduce the feed rate just before the drill point
penetrates the other side of the material.
106 - 10. Patching- clean __________ __________ of the material with solvent to remove oils and dirt.
both sides
106 - 11. With Elastomers, __________ of the original shape is recovered almost immediately
most
106 - 12. Chemicals called __________ reduce deterioration caused by oxidation
antioxidants
106 - 13. Properties of rubber- class T resists damage by extreme
high and low temperatures
106 - 14. The _________ sulfur used the __________ the vulcanized product.
less
softer
106 - 15. Flexibility is important in the coatings for certain __________ and __________.
wires and cables
106 - 16. A radial cut is produced by cutting a log __________, with the cut going through or very near the _________ of the log.
lengthwise
centerline
106 - 17. Measurements of _________ __________ refer to the actual length of a board.
running feet
106 - 18. Best veneer quality of plywood is?
N - natural finish veneer
106 - 19. Each Knot ________ the wood.
weakens
106 - 20. In _________, the pilot hole should be only half as deep as the length of the screw.
softwoods
106 - 21. Air entrained concrete is for building structures?
exposed to severe cold.
106 - 22. Cinder block is used?.
above ground
106 - 23. Type N is a __________
___________ mortar.
medium strength
106 - 24. Special plasters include those with vermiculite or perlite aggregates provide _________
__________ and __________.
fire protection
insulation
106 - 25. To determine correct glass size for a window pane, measure the sash and deduct ?
1/16 to 1/8 inch.
106 - 26. ___________ Insulation and some synthetic products will burn.
Vegetable
106 - 27. Installing blanket insulation- use _________ __________ or a ___________ _________ to cut the insulation. Use proper cutting tools
large shears or a sharp knife
106 - 28. Reducing machine vibration. The remaining vibration can be reduced by __________ ___________ or ducts with lead sheet.
wrapping pipes
106 - 29. An asphalt coating serves as an insulation adhesive ________ _________
above ground.
106 - 30. The best fire protection is using building materials that cannot burn and are chemically treated. And should have the best possible fire extinguishing equipment
All of the above
106 - 31. Try to use one that is similar to the previous coating that will _________ _________ by providing long-lasting protection to the material
reduce maintenance
106 - 32. Surface preparation is the single most important factor for success in applying a _________ __________
protective coating.
106 - 33. White blasting creates the __________ __________ _________.
best anchor pattern
106 - 34. Safety colors and their uses. __________ is for safety- safety showers, first aide stations, first aid kit’s, gas masks, safety instruction signs, and structures.
Green
106 - 35. Color codes for piping- _________ is for fire protection, water, foam, and carbon dioxide.
red
106 - 36. PH scale- numbers __________ seven indicate acidity.
below
106 - 37. _________ ___________ __________is the safest industrial cleaning solvent
Dry cleaning solvent
106 - 38. Synthetic lubricants offer more heat and fire resistance and are better for
high temperature uses
106 - 39. Cyanide is the most dangerous chemical in .
electroplating
106 - 40 To __________ __________ ________, you should always use grounding devices on hoses, nozzles, tanks, and metal containers use only approved grounding devices
avoid fuel fires
106 - 41. Curing is the
completion of all chemical and physical reactions that affect bonding.
106 - 42. Water soluble gums and starches from plants are made into natural vegetable glues called .
mucilage
106 - 43. __________ __________ __________ is a high strength Adhesive joints and has the greatest surface area
bevel lap joint
106 - 44. rubber tapes are good for
Electrical repairs
106 - 45. High temperature tapes are coated with fluorocarbon Or silicone adhesives and are used where service conditions include
High temperatures
106 - 46. __________ is chemically inert at room temperature
Carbon
106 - 47. __________ ___________ carry electric current to and from the rotating armature of the motor
Carbon Brushes
106 - 48. Noisy operating electrical equipment often indicates
brush problems.
106 - 49. Nonporous seals do not allow any liquid or gas to penetrate the seal material where.
even a tiny leak would be harmful
106 - 50. Position the packing joints ________* apart when installing two rings
180*
417 - 1. the only purpose of filler rod is to
Supply filler metal to the joint
417 - 2. In the __________ process, a consumable rod is used and special materials in the electrode coating create a gaseous cloud that shields the ara area from atmospheric contamination
SMAW Shielded Metal Arc Welding
417 - 3. A __________ weld is triangular in cross section and is used in joints that have two surfaces approximately at right angles to each other
Fillet
417 - 4. Parts of the weld include the toe, root, and _________.
Throat
417 - 5. Joint __________ is joint alignment, spacing, and edge preparation
Fitup
417 - 6. Good housekeeping is when you
Do not allow hoses and cables to cross areas where people walk
417 - 7. Keep all ________ out of the welding area
Combustibles
417 - 8. Never position your head directly over rising fumes. You should
Hold your head off to the side
417 - 9. Sturdy ________ or __________ _________ not only protect u from burns but also insulate against electric shock
Leather or canvas gloves
417 - 10. When should you have a qualified technician check the regulator?
When the regulator connection still leaks after reasonable tightening
417 - 11. An oxyfuel welding outfit consists of a
Torch
417 - 12. As added protection against flying sparks you should wear
Boots or high cut shoes
417 - 13. One of the first steps in setting up an oxyfuel welding outfit is
Crack the cylinder valves momentarily to blow out and dirt or dust
417 - 14. A neutral flame has a small, brilliant __________ cone next to the tip, surrounded by a large _________ flame envelope
White
Blue
417 - 15. Shutdown procedure : close the __________ control valve on the _________ first, then close the fuel gas control valve
Oxygen
Torch
