Previous Years GATE Questions on Engineering Materials 2002-2011

Solved Gate Questions on Engineering Materials

Question 1. The ductility of a material with work hardening

(A) Increases

(B) Decreases

(C) Remains unaffected

(D) Unpredictable

GATE-ME-2002

Hint

Question 2. Hardness of steel greatly improves with

(A) Annealing

(B) Cyaniding

(C) Normalizing

(D) Tempering

GATE-ME-2003

Hint

Question 3. During heat treatment of steel, the hardness of various structures in increasing order is

(A) Martensite, fine pearlite, coarse pearlite,spherodite

(B) Fine pearlite, coarse pearlite, spherodite, martensite

(C) Martensite, , coarse pearlite, fine pearlite, spherodite

(D) Spherodite, coarse pearlite, fine pearlite, martensite

GATE-ME-2003

Hint

Question 4. From the list given below, choose the most appropriate set of heat treatment process and the corresponding process characteristics

 

(A) P-3, Q-1,  R-5

(B) P-4, Q-3,  R-2

(C) P-4, Q-1,  R-2

(D) P-1, Q-5,  R-4

GATE-ME-2004

Hint

Question 5. Grey cast iron blocks  are to be cast in sands moulds. Shrinkage allowance for pattern making is 1 %. The ratio of the volume of pattern to that of casting will be

(A) 0.97

(B) 0.99

(C) 1.01

(D) 1.03

GATE-ME-2004

Hint

Question 6. The percentage of carbon in grey cast iron is in the range  of

(A) 0.25 to 0.75 percent

(B) 1.25 to 1.75 percent

(C) 3 to 4 percent

(D) 8 to 10 percent

GATE-ME-2004

Hint

Question 7. When the temperature of a solid metal increases.

(A) Strength of the metal decreases but ductility increases.

(B) Both strength and the ductility of the metal decreases.

(C) Both strength and the ductility of the metal increases.

(D) Strength of the metal increases but ductility decreases.

 

GATE-ME-2005

Hint

Question 8. Match the items in column I and II.

 

(A) P-4, Q-5, R-3, S-2

(B) P-3, Q-5, R-1, S-4

(C) P-2, Q-4, R-3, S-5

(D) P-4, Q-2, R-1, S-3

GATE-ME-2006

Hint

Question 9. The ultimate tensile strength of a material is 400 MPa and the elongation up to maximum load is 35%. If the material obeys power law of hardening, then the rue stress –true strain relation (stress in MPa) in the plastic deformation range is :

(A) 

(B) 

(C)

(D)

GATE-ME-2006

Hint

Question 10. The main purpose of spheroidising treatment is to improve

(A) Hardenability of low carbon steels

(B) Machinability of low carbon steels

(C) Hardenability of high carbon steels

 (D) Machinability of high carbon steels

GATE-ME-2006

Hint

Question 11. If a particular Fe-C alloy contains less than 0.83 % carbon, it is called

(A) High speed steel

(B) Hypoeutectoid steel

(C) Hypereutectoid steel

(D) Cast iron

GATE-ME-2006

Hint

Question 12. The effective number of lattice points in the unit cell of simple cubic, body centered cubic, and face centered cubic  space lattices, respectively are

(A) 1,2,2

(B) 1,2,4

(C) 2,3,4

(D) 2,4,4

GATE-ME-2009

Hint

Question 13. The material property which depends only on the basic crystal structure is

(A) Fatigue strength

(B) Work hardening

(C) Fracture strength

(D) Elastic constant

GATE-ME-2010

Hint

Question 14. The operation in which oil is permeated into the pores of a powder metallurgy product is known as

(A) Mixing

(B) Sintering

(C) Impregnation

(D)Infiltration

GATE-ME-2011

Hint

Question 15. The crystal structure of austenite is

(A) Body centered Cubic

(B) Face centered Cubic

(C) Hexagonal closed packed

(D) Body centered tetragonal

GATE-ME-2011

Hint

Answer Keys