GATE Mechanical Engineering: Questions 55 - 59 of 68

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Question number: 55

» Manufacturing and Industrial Engineering » Metal Casting » Solidification and Cooling

MCQ▾

Question

The hot tearing in a metal casting is due to

Choices

Choice (4) Response

a.

low coefficient of thermal expansion

b.

wide range of solidification temperature

c.

high fluidity

d.

high melt temperature

Question number: 56

» Manufacturing and Industrial Engineering » Metal Casting » Design of Patterns

Appeared in Year: 1999

MCQ▾

Question

Which of the following materials requires the largest shrinkage allowance, while making a pattern for casting?

Choices

Choice (4) Response

a.

Brass

b.

Cast Iron

c.

Plain Carbon Steel

d.

Aluminum

Question number: 57

» Manufacturing and Industrial Engineering » Metal Casting » Moulds

Appeared in Year: 2009

Match List-Ⅰ List-Ⅱ▾

Question

Match the following iten:
List-Ⅰ List-Ⅱ

(A)

Metallic Chaplets

(i)

Control cooling of critical sections

(B)

Exothermic Padding

(ii)

Reservoir of the molten metal

(C)

Metallic Chills

(iii)

Progressive solidification

(D)

Riser

(iv)

Support for the core

Choices

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

a.

  • (iv)
  • (i)
  • (iii)
  • (ii)

b.

  • (ii)
  • (iii)
  • (iv)
  • (i)

c.

  • (iii)
  • (ii)
  • (iv)
  • (i)

d.

  • (ii)
  • (i)
  • (iv)
  • (iii)

Question number: 58

» Manufacturing and Industrial Engineering » Metal Casting » Design of Patterns

Appeared in Year: 2004

MCQ▾

Question

Gray cast iron blocks 200 x 100 x 10 mm are to be cast in sand moulds. Shrinkage allowance for pattern making is 1%. The ratio of the volume of pattern to that of the casting will be

Choices

Choice (4) Response

a.

0.99

b.

0.97

c.

1.03

d.

1.01

Question number: 59

» Manufacturing and Industrial Engineering » Metal Casting » Solidification and Cooling

Appeared in Year: 2012

MCQ▾

Question

In sand casting, fluidity of the molten metal increases with

Choices

Choice (4) Response

a.

increase in sand grain size

b.

decrease in pouring rate

c.

increase in degree of superheat

d.

increase in thermal conductivity of the mould

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