Gaseous diffusivity at atmospheric pressure is of the order of __________ cm2/second.

Question: Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m2 .k), when the insulation thickness is __________ mm.
[A].

15

[B].

25

[C].

10

[D].

30

Answer: Option B

Explanation:

No answer description available for this question.

Question: Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of
[A].

90% tungsten carbide and 10% cobalt.

[B].

70% aluminium oxide & 30% silica.

[C].

30% nickel, 15% chromium & 55% tungsten.

[D].

65% tungsten & 35% zirconium.

Answer: Option A

Explanation:

No answer description available for this question.

Question: __________ cycle is the most efficient thermodynamic cycle.
[A].

Diesel

[B].

Otto

[C].

Rankine

[D].

Carnot

Answer: Option D

Explanation:

No answer description available for this question.