The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe) ?

Question: Circulation of liquid metal (i.e. molten sodium) in a liquid metal cooled nuclear reactor is done by a/an __________ pump.
[A].

electromagnetic

[B].

axial flow

[C].

diaphragm

[D].

reciprocating

Answer: Option A

Explanation:

No answer description available for this question.

Question: Out of the following, the materials having maximum magnetic permeability is
[A].

silicon steel (Si = 4%)

[B].

cast iron

[C].

wrought iron

[D].

mild steel

Answer: Option A

Explanation:

No answer description available for this question.

Question: Friction factor for fluid flow in pipe does not depend upon the
[A].

pipe length.

[B].

pipe roughness.

[C].

fluid density & viscosity.

[D].

mass flow rate of fluid.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Copper is not present as an alloying constituent in
[A].

silicon bronze

[B].

constantan

[C].

nichrome

[D].

delta metal

Answer: Option C

Explanation:

No answer description available for this question.

Question: __________ of austenite decreases the hardenability in steel.
[A].

Fine grains

[B].

Coarse grains

[C].

Homogeneity

[D].

Dissolved elements (except cobalt)

Answer: Option D

Explanation:

No answer description available for this question.

Question: One face of a furnace wall is at 1030°C and the other face is exposed to room temperature (30°C). If the thermal conductivity of furnace wall is 3 W . m-1 . k-1 and the wall thickness is 0.3 m, the maximum heat loss (in W/m) is
[A].

100

[B].

900

[C].

9000

[D].

10000

Answer: Option D

Explanation:

No answer description available for this question.