GATE (Graduate Aptitude Test in Engineering) Mechanical Engineering: Questions 60 - 63 of 170

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Question 60

Appeared in Year: 2011

Question

MCQ▾

A cubic casting of 50 mm side undergoes volumetric solidification shrinkage and volumetric solid contraction of 4 % and 6 % respectively. No riser is used. Assume uniform cooling in all directions. The side of the cube after solidification and contraction is

Choices

Choice (4)Response

a.

48.32 mm

b.

49.94 mm

c.

49.96 mm

d.

49.90 mm

Question 61

Structure and Properties of Engineering Materials

Appeared in Year: 1998

Question

Match List-Ⅰ List-Ⅱ▾

Match the following:

List-ⅠList-Ⅱ
(A)

USM

(i)

Ion displacement

(B)

ECM

(ii)

Melting and vaporization

(C)

LBM

(iii)

Erosion/Brittle fracture

(D)

EDM

(iv)

vapourisation

Choices

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

a.

  • (iii)
  • (i)
  • (iv)
  • (ii)

b.

  • (iii)
  • (ii)
  • (iv)
  • (i)

c.

  • (ii)
  • (i)
  • (iv)
  • (iii)

d.

  • (i)
  • (ii)
  • (iii)
  • (iv)

Question 62

Appeared in Year: 2008

Question

MCQ▾

While cooling, a cubical casting of side 40 mm undergoes 3 % , 4 % and 5 % volume shrinkage during the liquid state, phase transition and solid state, respectively. The volume of metal compensated from the riser is

Choices

Choice (4)Response

a.

2 %

b.

8 %

c.

9 %

d.

7 %

Question 63

First and Second Laws of Thermodynamics

Appeared in Year: 1993

Question

MCQ▾

An insulated rigid vessel contains a mixture of fuel and air . the mixture is ignited by a minute spark . the contents of vessel experience

Choices

Choice (4)Response

a.

increase in temperature , pressure and energy

b.

decrease in temperature , pressure and energy

c.

increase in temperature and pressure but no change in energy

d.

increase in temperature and pressure but decrease in energy

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