3. The text contains different mistakes: 4 — in spelling, 3 — in grammar. Cor-
rect the mistakes and rewrite the text.
Casting is one of the main manufacturing proceses. Casting is a process
of poring molten metall into a mold where it solidify into the shape of a mold.
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Casting was well establish in the Bronze Age when it was use to form bronze
pieces now found in muzeums.
4. Answer these multiple-choice questions about engineering materials tech-
nology.
1.
What operations does forging include?
A. casting, forging, pressing
B. drawing out, upsetting, squeezing in compression dies
C. forming, cutting, joining
2.
What processes does final metallurgy embrace?
A. rolling, forging, drawing
B. rolling, extrusion, drawing
C. forging, casting, drawing
3.
What kinds of casting do you know?
A. sand casting, spin casting, shell casting, die casting
B. mold casting, sand casting, die casting, spin casting
C. sand casting, shell-mold casting, die casting, spin casting
4.
What temperatures can forging operations be performed at?
A. at various temperatures
B. above the recrystallization temperature
C. below the recrystallization temperature
5.
What processes does metalworking include?
A. forming, cutting
B. forming, joining
C. forming, cutting, joining
6.
What is extrusion?
A. is a process when material is pushed through a die of the desired cross
section
B. is a process in which metal stock is passed through a pair of rolls
C. is a process which uses tensile forces to stretch metal
7.
What is drawing?
A. is a process when material is pushed through a die of the desired cross
section
B. is a process in which metal stock is passed through a pair of rolls
C. is a process which uses tensile forces to stretch metal
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