The bank of tubes located at the back of the domestic refrigerators are the _______________ tubes?

Question: At the point of boundary layer separation in fluid flow, the
[A].

shear stress is maximum.

[B].

velocity gradient is flat.

[C].

density variation is maximum.

[D].

shear stress is zero.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Heating the hypoeutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called
[A].

tempering

[B].

hardening

[C].

annealing

[D].

normalising

Answer: Option C

Explanation:

No answer description available for this question.

Question: Boiling temperature of carbon dioxide at atmospheric pressure is __________ °C.
[A].

-30.5

[B].

-78.5

[C].

-183.5

[D].

-10.5

Answer: Option B

Explanation:

No answer description available for this question.

Question: In connection with corrosion of metals, passivation is the process that
[A].

intensifies deterioration.

[B].

changes the composition of the metal.

[C].

inhibits further deterioration.

[D].

none of these.

Answer: Option C

Explanation:

No answer description available for this question.