GATE (Graduate Aptitude Test in Engineering) Mechanical Engineering: Questions 69 - 73 of 170

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Question 69

Stress and Strain Diagrams for Engineering Materials

Appeared in Year: 1990

Question

MCQ▾

When one percent plane carbon steel is slowly cooled from the molten state to 740 Celsius , the resulting structure will contain

Choices

Choice (4)Response

a.

austenite and cementite

b.

pearlite and cementite

c.

austenite and ferrite

d.

ferrite and cementite

Question 70

Structure and Properties of Engineering Materials

Appeared in Year: 1999

Question

MCQ▾

In Electro-Discharge Machining (EDM) , the tool is made of

Choices

Choice (4)Response

a.

Copper

b.

High Speed Steel

c.

Plain Carbon Steel

d.

Cast Iron

Question 71

Irreversibility and Availability

Write in Short

Short Answer▾

A gas of 5 bar pressure and volume of 1 cm expands isothermally in a piston cylinder to a volume of 5 cm. Determine the work done by the gas. (Assume the reversible expansion)

Question 72

Appeared in Year: 1992

Question

MCQ▾

The two main criteria for selecting the electrolyte in Electrochemical Machining (ECM) is that the electrolyte should

Choices

Choice (4)Response

a.

Not allow dissolution of cathode material

b.

Have high electrical conductivity

c.

Be chemically stable

d.

Both c. and b. are correct

Question 73

Appeared in Year: 2009

Question

Match List-Ⅰ List-Ⅱ▾

Match the items in Column I and Column II .

List-Ⅰ (Column I)List-Ⅱ (Column II)
(A)

Riser

(i)

Support for the core

(B)

Metallic Chaplets

(ii)

Progressive solidification

(C)

Exothermic Padding

(iii)

Control cooling of critical sections

(D)

Metallic Chills

(iv)

Reservoir of the molten metal

Choices

Choice (4)Response
  • (A)
  • (B)
  • (C)
  • (D)

a.

  • (iii)
  • (ii)
  • (iv)
  • (i)

b.

  • (iv)
  • (i)
  • (iii)
  • (ii)

c.

  • (iv)
  • (ii)
  • (i)
  • (iii)

d.

  • (iii)
  • (iv)
  • (i)
  • (ii)

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