Materials & Processed
1- the difference between die casting and permanent mold casting is that:
a) lighter alloys such as aluminum cannot be cast in permanent molds
b) the permanent mold process is limited to thickness over 0.015”
c) the mold in the die cast process is destroyed after use
d) pressure is applied to the liquid metal in the die-cast process
2- Which of the processes listed below is used the most frequently to bond honeycomb cores to
the outer sheets?
a) Adhesive bonding
b) Diffusion bonding
c) Brazing
d) Friction welding
3- Corrosion attacks metals by
a) Indirect chemical action
b) Electro chemical reaction
c) Galvanic action
d) Oxygen content
4- In the making of seamless or electric resistance welded (ERW) pipe or tubing. The most
common discontinuities are oriented
a) Transverse to the pipe or tube axis
b) Parallel to the pipe or tube axis
c) Parallel to the maximum shear stress plane
d) Perpendicular to the maximum shear stress plane
5- Which of the following is true regarding the investment or lost wax casting process?
a) Tolerances are typically plus or minus 1/16”
b) Per-entrant angles cannot be produced during casting and must be machined
c) Large castings up to 8 feet in diameter are easily produced
d) In many cases tolerances are sufficient without further machining
6- Carbon steel is:
a) Non-ferritic, cubic faced
b) An alloy
c) Non-ferritic, martensitic.
d) Pearlitic
1
,
7- When inspecting complex solder joint, the normal NDT method used is:
a) Eddy Current
b) Acoustic Emission
c) VT
d) UT
8- Electrical discharge machining is useful in NDT testing because it can produce:
a) Fine surface finishes
b) Small holes and notches
c) Sharp reductions in cross sectional area
d) Natural flaws for precision calibration blocks
9- Which of the following alloy would have a negative effect on the corrosion resistance of steel:
a) Silicon
b) Nickel
c) Molybdenum
d) Sulfur
10- In the international system of units, the distinction between upper- and lower-case letter
should be observed. For example, the meanings of the prefix m (Milli) and M (Mega) differ
by:
a) 2 orders of magnitude
b) 6 orders of magnitude
c) 9 orders of magnitude
d) 12 orders of magnitude
11- Which of the following materials has the highest electrical conductivity?
a) Aluminum (Pure)
b) Lead (Pure)
c) Copper (Pure)
d) Silver (Pure)
12- A process that joins tow members together by using capillary action to flow the filler material
is called:
a) Soldering if the temperature does not exceed 800 F
b) Brazing if the temperature does not exceed 800 F
c) Resistance welding
d) Oxyfuel gas welding
2
1- the difference between die casting and permanent mold casting is that:
a) lighter alloys such as aluminum cannot be cast in permanent molds
b) the permanent mold process is limited to thickness over 0.015”
c) the mold in the die cast process is destroyed after use
d) pressure is applied to the liquid metal in the die-cast process
2- Which of the processes listed below is used the most frequently to bond honeycomb cores to
the outer sheets?
a) Adhesive bonding
b) Diffusion bonding
c) Brazing
d) Friction welding
3- Corrosion attacks metals by
a) Indirect chemical action
b) Electro chemical reaction
c) Galvanic action
d) Oxygen content
4- In the making of seamless or electric resistance welded (ERW) pipe or tubing. The most
common discontinuities are oriented
a) Transverse to the pipe or tube axis
b) Parallel to the pipe or tube axis
c) Parallel to the maximum shear stress plane
d) Perpendicular to the maximum shear stress plane
5- Which of the following is true regarding the investment or lost wax casting process?
a) Tolerances are typically plus or minus 1/16”
b) Per-entrant angles cannot be produced during casting and must be machined
c) Large castings up to 8 feet in diameter are easily produced
d) In many cases tolerances are sufficient without further machining
6- Carbon steel is:
a) Non-ferritic, cubic faced
b) An alloy
c) Non-ferritic, martensitic.
d) Pearlitic
1
,
7- When inspecting complex solder joint, the normal NDT method used is:
a) Eddy Current
b) Acoustic Emission
c) VT
d) UT
8- Electrical discharge machining is useful in NDT testing because it can produce:
a) Fine surface finishes
b) Small holes and notches
c) Sharp reductions in cross sectional area
d) Natural flaws for precision calibration blocks
9- Which of the following alloy would have a negative effect on the corrosion resistance of steel:
a) Silicon
b) Nickel
c) Molybdenum
d) Sulfur
10- In the international system of units, the distinction between upper- and lower-case letter
should be observed. For example, the meanings of the prefix m (Milli) and M (Mega) differ
by:
a) 2 orders of magnitude
b) 6 orders of magnitude
c) 9 orders of magnitude
d) 12 orders of magnitude
11- Which of the following materials has the highest electrical conductivity?
a) Aluminum (Pure)
b) Lead (Pure)
c) Copper (Pure)
d) Silver (Pure)
12- A process that joins tow members together by using capillary action to flow the filler material
is called:
a) Soldering if the temperature does not exceed 800 F
b) Brazing if the temperature does not exceed 800 F
c) Resistance welding
d) Oxyfuel gas welding
2
