# Chemical Engineering - Process Equipment and Plant Design

### Exercise :: Process Equipment and Plant Design - Section 5

16.

The thermal stress in a metallic bar does not depend upon the

 A. changes in temperature. B. cross-sectional area. C. both (a) and (b). D. neither (a) nor (b).

Explanation:

No answer description available for this question. Let us discuss.

17.

The minimum baffle height should be

 A. equal to the impeller diameter. B. twice the impeller diameter. C. twice the tank diameter. D. 3/4 of the tank height.

Explanation:

No answer description available for this question. Let us discuss.

18.

For turbulent flow (NRe > 2100) of low viscosity fluid (μ > 20cp) in steel pipes, the optimum inside pipe diameter is given by(where, Q = fluid flow rate, ft3/sec.ρ = fluid density, lb/ft3 μ = fluid viscosity, centipoise Di = optimum inside pipe diameter, inches)

 A. Di, opt = 3.9 Q0.45 ρ0.13 B. Di, opt = 3.9 Q0.45 . μ0.95 C. Di, opt = 4.7 Q0.36 . μ3.2ρ0.13 D. Di, opt = 3 Q0.36 . μ0.88

Explanation:

No answer description available for this question. Let us discuss.

19.

To avoid the tearing off the plate of an edge, the margin (i.e., the minimum distance from the centre of the rivet hole to the nearest edge of the plate) should be equal to

 A. 0.5 d B. d C. 1.5 d D. 2.5 d

Explanation:

No answer description available for this question. Let us discuss.

20.

The normal range of velocity of water in pipes is __________ m/sec.

 A. 0.1-0.5 B. 1-2 C. 10-50 D. 15-30