Engineering Materials objective questions with answers part4

Q1. A cold chisel is made of
(A) mild steel
(B) cast iron
(C) high carbon
(D) german silver

Q2. An engineer’s hammer is made of
(A) cast iron
(B) forged steel
(C) mild steel
(D) high carbon steel

Q3. Inconel is an alloy of
(A) nickel, chromium and iron
(B) nickel, copper
(C) nickel, chromium
(D) nickel, zinc

Q4. By severely deforming a metal in a particular direction it becomes
(A) ductile
(B) homogeneous
(C) isotropic
(D) anisotropic.

Q5. Solder is an alloy consisting of
(A) tin, antimony, copper
(B) tin and copper
(C) tin and lead
(D) lead and zinc

Q6. Cyaniding is the process of
(A) reacting steel surface with cyanide salts
(B) adding carbon and nitrogen by heat treatment of steel to increase its surface hardness
(C) obtaining cyanide salts
(D) making corrosion resistant steel

Q7. Induction hardening is the process of
(A) hardening surface of workpiece to ob-tain hard and wear resistant surface
(B) heating and cooling rapidly
(C) increasing hardness throughout
(D) inducing hardness by continuous process

Q8. The loss of strength in compression with simultaneous gain in strength in tension due to overloading is known as
(A) hysteresis
(B) creep
(C) visco elasticity
(D) Boeschinger effect

Q9. Process of austempering results in
(A) formation of bainite structure
(B) carburised structure
(C) martenistic structure
(D) relieving of stresses throughout a component

Q10. Weld decay is the phenomenon found with
(A) cast iron
(B) mild steel
(C) wrought iron
(D) stainless steel.

Q11. Materials after cold working are subjected to following process to relieve stresses
(A) hot working
(B) tempering
(C) normalising
(D) annealing

Q12. Hardness of upper bainite (acicular structure) is about
(A) RC 65
(B) RC 48
(C) RC 57
(D) RC 80

Q13. Carbon in iron is an example of
(A) substitutional solution
(B) interstitial solid solution
(C) intermetallic compounds
(D) all of the above

Q14. Brass is an example of
(A) substitutional solid solution
(B) interstitial solid solution
(C) intermetallic compounds
(D) all of the above

Q15. Which is false statement about annealing. Annealing is done to
(A) harden steel slightly
(B) improve machining characteristic
(C) soften material
(D) permit further cold working

Q16. Argentite is the principal ore or raw material for
(A) aluminium
(B) tin
(C) zinc
(D) silver.

Q17. Hardness of lower bainite (tempered martensite) is about
(A) RC 65
(B) RC 48
(C) RC 57
(D) RC 80

Q18. 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

Q19. Vanadium in high speed steels
(A) promotes decarburisation
(B) provides high hot hardness
(C) forms very hard carbides and thus in-creases wear resistance
(D) promotes retention of austenite

Q20. 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