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.Management Sciences
Category: Engineering Materials
Which of the following element results in presence of free graphite in C.I_________________?
A. carbon
B. sulphur
C. silicon
D. manganese
E. phosphorous
Phosphor bronze contains____________________?
A. 0.5% of phosphorous
B. 1% phosphorous
C. 2.5% phosphorous
D. 5% phosphorous
E. none of the above
Babbit metal is a_________________?
A. lead base alloy
B. tin base alloy
C. copper base alloy
D. all of the above
E. A. and C. above
Malleability of a material can be defined as ______________________?
A. ability to undergo large permanent deformations in compression
B. ability to recover its original form
C. ability to undergo large permanent deformations in tension
D. all of the above
E. none of the above
Ductile cast iron___________________?
A. contains 1.7 to 3.5% carbon in free state and is obtained by the slow cooling of molten cast iron
B. is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable
C. is produced by annealing process. It is soft, tough and easily machined metal
D. is produced by small additions of magnesium (or creium) in the ladle. Graphite is in nodular or spheroidal form and is well dispersed throughout the material
E. none of the above
Cast iron has_________________?
A. high tensile strength
B. its elastic limit close to the ultimate breaking strength
C. high ductility
D. all of the above
E. none of the above
Large forgings, crank shafts, axles normally contain carbon up to________________?
A. 0.05 to 0.20%
B. 0.20 to 0.45%
C. 0.45 to 0.55%
D. 0.55 to 1.0%
E. 1.0 to 1.2%.
Which of the following represents the allotropic forms of iron__________________?
A. alpha iron, beta iron and gamma iron
B. alpha iron and beta iron
C. body centred cubic a-iron and face centred cubic a-iron
D. alpha iron, gamma from and delta iron
E. none of the above
Which is false statement about normalizing. Normalizing is done to _________________?
A. refine grain structure
B. reduce segregation in casting
C. improve mechanical properties
D. induce stresses-
E. relieve internal stresses
Connecting rod is usually made of_________________?
A. aluminium
B. low carbon steel
C. medium carbon steel
D. high carbon steel
E. cast iron
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