A. has a fixed structure under all conditions
B. exists in several crystal forms at different temperatures
C. responds to heat treatment
D. has its atoms distributed in a random pattern
E. none of the above
Related Mcqs:
- For the allotropic forms of iron, the points of arrest are __________________?
A. the points where no further change oc-curs
B. constant for all metals
C. the points where there is no further flow of metal
D. the points of discontinuity
E. the points where major changes take place - 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 - The ability of a material to resist softening at high temperature is known as____________________?
A. creep
B. hot tempering
C. hot hardness
D. fatigue
E. superhardening - 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 - Which of the following is the binding material in cemented carbides___________________?
A. cobalt
B. nickel
C. vanadium
D. iron
E. carbon - An example of amorphous material is____________?
A. zinc
B. lead
C. silver
D. glass
E. brass - Amorphous material is one___________________?
A. in which atoms align themselves in a geometric pattern upon solidification
B. in which there is no definite atomic structure and atoms exist in a random pattern just as in a liquid
C. which is not attacked by phosphorous
D. which emits fumes on melting
E. none of the above - Argentite is the principal ore or raw material for _________________?
A. aluminium
B. tin
C. zinc
D. lead
E. silver - Surveying tapes are made of a material having low coefficient of expansion and enough strength. The alloy used is__________________?
A. silver metal
B. duralumin
C. Hastelloy
D. monel metal
E. invar - Ductility 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
