Process Equipment And Plant Design - Study Mode

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[#131] The minimum shell thickness for tank ≤ 15 metres diameter is limited to __________ mm, for reasons of elastic stability.

(A) 2

(B) 5

(C) 10

(D) 15

Correct Answer

(B) 5

[#132] Diameter of rivet hole (d, mm) and the plate thickness (t, mm) are related by Unwin's formula as

(A) d = 1.1 t

(B) d = 1.6$$sqrt { ext{t}} $$

(C) d = 1.5 t

(D) d = 3$$sqrt { ext{t}} $$

Correct Answer

(B) d = 1.6$$sqrt { ext{t}} $$

[#133] In a shell and tube heat exchanger, the overall heat transfer co-efficient is proportional to the tube side (volumetric flow rate) 0.8 . This is valid, only when the ratio of the tube side film resistance to the total resistance is almost equal to

(A) ∞

(B) 1

(C) 20.8

(D) 2

Correct Answer

(B) 1

[#134] The retention time of material in a rotary dryer depends upon its

(A) Rpm

(B) Slope & length

(C) Flights arrangement

(D) All of the above

Correct Answer

(D) All of the above

[#135] In case of bubble cap distillation column of diameter greater than 1.2 metres, the cap diameter is roughly about __________ cms.

(A) 10

(B) 20

(C) 30

(D) 35

Correct Answer

(A) 10